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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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questions about fuel and generators (incl. a legal one)
Hello, I am considering taking a house 'off grid', and would be
grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Cheers, john |
#2
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questions about fuel and generators (incl. a legal one)
On Apr 10, 8:52*am, John Nagelson wrote:
Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? I'd be amazed if any of these ways of making electriciity was cheaper than buying it off the grid. I'd also be amazed if any of them was better for the environment than buying it from the grid. I would worry about the noise - the continuous humm of even a well silenced generator is quite wearing for those who live within earshot. Using those fuels for direct heating is another matter. For electricity I'd use PV panels, possibly a wind turbine if I lived somewhere extremely windy. I used to live off grid on a boat and did heating by coal and oil and electricity from PV. Cooking from bottled gas. You can get oil fired boilers that do not use any electricty (Kabola for example). Robert |
#3
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questions about fuel and generators (incl. a legal one)
On Apr 10, 9:13*am, RobertL wrote:
On Apr 10, 8:52*am, John Nagelson wrote: Using those fuels for direct heating is another matter. *For electricity I'd use PV panels, possibly a wind turbine if I lived somewhere extremely windy. I used to live off grid on *a boat and did heating by coal and oil and electricity from PV. Cooking from bottled gas. *You can get oil fired boilers that do not use any electricty (Kabola for example). I'll be using solid fuel and maybe also oil for heating. Very interested in an oil-fired boiler that does not use electricity. Where does the force come from to work the water pump? Does it include a small generator to output a current to do this? (I've always thought that would be a good idea). Or does it do it without involving electricity at all?? Cheers, John (still looking into PVs too) |
#4
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 02:04:20 -0700 (PDT), John Nagelson
wrote: On Apr 10, 9:13*am, RobertL wrote: On Apr 10, 8:52*am, John Nagelson wrote: Using those fuels for direct heating is another matter. *For electricity I'd use PV panels, possibly a wind turbine if I lived somewhere extremely windy. I used to live off grid on *a boat and did heating by coal and oil and electricity from PV. Cooking from bottled gas. *You can get oil fired boilers that do not use any electricty (Kabola for example). I'll be using solid fuel and maybe also oil for heating. Very interested in an oil-fired boiler that does not use electricity. Where does the force come from to work the water pump? Does it include a small generator to output a current to do this? (I've always thought that would be a good idea). Or does it do it without involving electricity at all?? It could work by natural convection of the water, as all central heating did before the 60s, when water pumps were too noisy. You needed large diameter pipes and put the boiler low down - often in the basement. -- Max Demian |
#5
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questions about fuel and generators (incl. a legal one)
On Apr 10, 10:04*am, John Nagelson wrote:
On Apr 10, 9:13*am, RobertL wrote: On Apr 10, 8:52*am, John Nagelson wrote: Using those fuels for direct heating is another matter. *For electricity I'd use PV panels, possibly a wind turbine if I lived somewhere extremely windy. I used to live off grid on *a boat and did heating by coal and oil and electricity from PV. Cooking from bottled gas. *You can get oil fired boilers that do not use any electricty (Kabola for example). I'll be using solid fuel and maybe also oil for heating. Very interested in an oil-fired boiler that does not use electricity. Where does the force come from to work the water pump? Does it include a small generator to output a current to do this? (I've always thought that would be a good idea). Or does it do it without involving electricity at all?? My boat had a Kabola stove. This burned red diesel and was fed by gravity - there is a small float chamber with an adjustable needle valve to control the flow. The oil drips into a thing like a chip pan where it evaporates abd burns. The radators were fed by gravity (convenction). I believe yo ucan run it on buring oil or kerosene as well. With the Kabola, about half the heat comes out of the boiler itself, so you should put that in the main room, not in an outhouse. THis is the one I had: http://www.kuranda.co.uk/kabola-heat...a-e5-100..html Robert |
#6
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questions about fuel and generators (incl. a legal one)
John Nagelson wrote:
On Apr 10, 9:13 am, RobertL wrote: On Apr 10, 8:52 am, John Nagelson wrote: Using those fuels for direct heating is another matter. For electricity I'd use PV panels, possibly a wind turbine if I lived somewhere extremely windy. I used to live off grid on a boat and did heating by coal and oil and electricity from PV. Cooking from bottled gas. You can get oil fired boilers that do not use any electricty (Kabola for example). I'll be using solid fuel and maybe also oil for heating. Very interested in an oil-fired boiler that does not use electricity. Where does the force come from to work the water pump? Gravity feed. Any good range type system - aga or rayburn - adapted for oil will do space heating very very well with no need for elelctricity, though our aga does modulate the oil flow between 'high' and 'low' with an electric themostat. It also solves most of your cooking needs. If you use a large bore gravity feed to a hot water tank, that does hot water as well. Heating other bits of the house? Well if you have chimneys or put in steel flues, the solid fuel wood burner stoves are fabulous if you have access to your own wood supply. That takes electricity out of the heating/cooking systems completely. Leaving a lower amount needed for mostly lights, and electronics stuff. |
#7
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 01:13:41 -0700 (PDT), RobertL wrote:
On Apr 10, 8:52*am, John Nagelson wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? I'd be amazed if any of these ways of making electriciity was cheaper than buying it off the grid. I'd also be amazed if any of them was better for the environment than buying it from the grid. I would worry about the noise - the continuous humm of even a well silenced generator is quite wearing for those who live within earshot. Quite. We have a house that's "on grid" but was "off" for a while a couple of years ago. To get around the problem we used a 2.5kW petrol genny. A back-of-the-enveope calculation at the time showed that the cost of fuel made our electricity x10 - x14 more expensive than from a commercial supplier. Although I can't prove it, I am firmly convinced that the generator was much less efficient than a power station - using any fuel. It also didn't have any of the scrubbing tech. that commercial power stations have, or a catalytic convertor - so it emitted a load of unpleasant stuff into the atmoshpere, apart from the CO2. There's also the worry about generator failure. If that's your only source of power, when (not if) it breaks down, or you run out of fuel than you're stuffed. I would expect that a generator rated for continous running would be many times more expensive than the ones you get at B&Q. -- .................................................. ......................... .. never trust a man who, when left alone ...... Pete Lynch . .. in a room with a tea cosy ...... Marlow, England . .. doesn't try it on (Billy Connolly) ..................................... |
#8
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questions about fuel and generators (incl. a legal one)
Peter Lynch wrote:
On Thu, 10 Apr 2008 01:13:41 -0700 (PDT), RobertL wrote: On Apr 10, 8:52 am, John Nagelson wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? I'd be amazed if any of these ways of making electriciity was cheaper than buying it off the grid. I'd also be amazed if any of them was better for the environment than buying it from the grid. I would worry about the noise - the continuous humm of even a well silenced generator is quite wearing for those who live within earshot. Quite. We have a house that's "on grid" but was "off" for a while a couple of years ago. To get around the problem we used a 2.5kW petrol genny. A back-of-the-enveope calculation at the time showed that the cost of fuel made our electricity x10 - x14 more expensive than from a commercial supplier. Although I can't prove it, I am firmly convinced that the generator was much less efficient than a power station - using any fuel. You're right. The efficency of producing electricity in bulk is about 35%, that's higher than the efficiency of an internal combustion engine alone, nevermind the generator part. I wonder if you could use a Stirling engine and use that to run a generator. The Stirling engine can have an efficiency of up to about 80% and can run on almost any heat source. If you're off the grid maybe you could park it on top of the aga or something and have the cold cylinder outside through a wall |
#9
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questions about fuel and generators (incl. a legal one)
Hello, I am considering taking a house 'off grid'
Why? There is no way you will generate electricity cheaper than that from the grid. |
#10
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questions about fuel and generators (incl. a legal one)
John Nagelson wrote:
Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Here you go, off the shelf: http://www.machinemart.co.uk/shop/ca...ven-generators £5k This heavy duty, diesel engine powered generator provides either main or emergency back up power for domestic, commercial and industrial premises. Robust construction, rugged yet technologically superior components and a Lister engine ensures dependability and years of reliable service. * 16.8kVA output at 230v single phase * Lister 4-stroke air cooled diesel engine * Heavy duty self regulating brushless alternators (1500rpm, 50Hz) * 12 volt, key switch electric start * Alternator mounted control panel with ammeter, voltmeter & overload circuit breaker * Mounted on heavy gauge iron base * Standard accessories include engine mounted fuel tank, silencer, battery 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Cheers, john |
#11
Posted to uk.d-i-y,uk.legal
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questions about fuel and generators (incl. a legal one)
John Nagelson wrote:
Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? What you are considering can only be practical if you can use the heat produced by the engine, as in a CHP generator. The problem with small diesel generators, especially cheap ones, is that they tend to be air cooled and even the water cooled ones run at a low temperature compared to a boiler. If they run too hot the engine will fail prematurely and you will need to change the oil frequently. To use solid fuel in a steam engine would be grossly inefficient compared to IC engines, and introduced problems with the use of live steam if you are aiming for the hoghest efficiency. This would need you to be trained and certified to operate such machinery. I suspect "forget it" is the better advice here. It would be possible to use a Stirling engine generator using the flue gasses from a solid fuel fire but AFAIR the only Stirling engine generators available at the moment work with natural gas only, cost a lot and provide very low generating capacity, typically around 1KVA. There's no practical difference between running an engine on diesel or kerosene. And if you use a kerosene stationary engine to provide electricity for your home you can use the same heating oil as is used in boiler. However you will effectively be throwing away 60%+ of the energy content of the fuel, whereas a good oil-fired boiler is 90% efficient. Using cooking oil is possible but may well damage the engine. Only the manufacturer can tell you. If you want to use cooking oil in winter it will have to be either heated or converted to biodiesel by esterifcation. The process is striaghtforward for a chemist but involves handling large quantities of strong alkali and is not recommended for amateurs. You would also need "quite a bit" of kit and to register with HMCE as a fuel producer in order to qualify for the small fuel producer fuel duty exemption, although since you don't want to use the fuel in a car they may waive registration. You'd have to ask them. Don't even think about any of this unless you can think of a way to scavenge and use the waste heat from the engine. And when it comes to a generator your sugestion of a small "Honda" diesel is inappropriate. A true Honda will cost a lot, generators in an open frame sold as "Honda" often only have a Honda motor and are incredibly noisy, usually greater than 109dbA. Regulation on these generators is poor, and you will have to put up with flickering lights even at the best of times. If you connect or disconnect a significant load (microwave, kettle) you will bown out for a time then the engine will really start to hammer as it takes up the load. If you are doign this the minimum generator capacity you should be looking at is 6KVA, it would probably be better to consider 12KVA. You shoudl also consider an alternator/inverter type generator which is electronically regulated to give a stable voltage to avoid the brownouts and flickering. You will also need to get a generator with a decent sound suppression cabinet, which can get the noise level down below 40dBA. This may still be intrusive at night and if you have neighbours they will complain, and if you don't do something about the noise they will take it up with the local authority. If you were au fait with what you intend to do, I suspect you wouldn't need to ask these questions. I suggest you go and learn some more about generators, efficiency, noise and CHP issues before you contemplate such an installation. |
#12
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson
wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? Diesel generators are available that will run on some grades of paraffin. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? At the size you need, almost impossible. 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Easy to get a diesel generator - I have no idea whether you could legally run it on red diesel, but it is quite likely that it would be legal. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? No matter what fuel you use, it will almost certainly cost you more just in running costs to supply a single domestic dwelling than buying from an electricity supplier in the normal way. A big problem with a single genny is that it must be large enough to supply your peak load. A generator that size is very inefficient most of the day when the load is low. There are ways to overcome that issue, but the required equipment is so expensive that it would not save enough to pay for itself over its expected life. Other things to consider are cost of servicing and whether you can install the generator in such a way that its operation 24/7 will not disturb your neighbours. For premises that need more electricity than a domestic dwelling, there are ways to save on cost by *augmenting* the grid from internally generated power. There are generators that "bolt on" to the back end of a (very large) gas central heating system to use energy that would otherwise be wasted, for example. An on-site generator can also be used to sell surpluss electricity back to the national grid. This needs arrangements to be made - not least of which is ensuring that you do not power the grid when the mains has been isolated by the electricity company so that they can work on the lines! In most locations, about the only cost-effective energy you can make at home is from a solar powered water heater. AFAICS any other scheme availabe at the present will cost you more than you could hope to save. -- Cynic |
#13
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questions about fuel and generators (incl. a legal one)
Cynic (Cynic ) gurgled happily, sounding much like
they were saying: A big problem with a single genny is that it must be large enough to supply your peak load. A generator that size is very inefficient most of the day when the load is low. Yes, but given... An on-site generator can also be used to sell surpluss electricity back to the national grid. ....can the over-size generator not be providing income by selling that surplus capacity back to the grid? I s'pose it would depend on the exact cost of generating versus the price paid by the grid as to whether it would be profitable... |
#14
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questions about fuel and generators (incl. a legal one)
...can the over-size generator not be providing income by selling that surplus capacity back to the grid? I s'pose it would depend on the exact cost of generating versus the price paid by the grid as to whether it would be profitable... It wouldn't be. And even if it was, the tariffs would be fixed so it wouldn't be. |
#15
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 11:33:17 +0000 (UTC), Adrian
wrote: A big problem with a single genny is that it must be large enough to supply your peak load. A generator that size is very inefficient most of the day when the load is low. Yes, but given... An on-site generator can also be used to sell surpluss electricity back to the national grid. ...can the over-size generator not be providing income by selling that surplus capacity back to the grid? I s'pose it would depend on the exact cost of generating versus the price paid by the grid as to whether it would be profitable... You don't have a hope of generating electricity as cheaply as a large power station, so you'll be losing money, but it *might* reduce the overhead of an underloaded genny running 24/7. IIUC the cost of the equipment needed before you will be permitted to connect your genny to the grid is pretty high. A better way is to have a large battery bank that powers the house, with the generator cutting in automatically when the charge gets below a set amount and runs just long enough to recharge the batteries. An invertor with sufficient output to power a house is very expensive, so are large capacity batteries. Maybe best to do it the old-fashioned way and use the batteries to power a brushless DC motor that drives an AC generator rather than using an electronic invertor. The diesel or paraffin generator would be DC and connected to the batteries via a charging circuit and battery charge monitor. For standing batteries you might go for a bank of open lead-acid cells in a small outbuilding. The plates can be removed from the container of each cell and replaced separately when needed (the old plates sold for recycling), and the acid can be filtered and the container cleaned periodically. The plates would probably last 3 to 5 years between replacements. You'll not get the cost down below what you pay for on-grid electricity though, and using home-generated power should only be contemplated if you don't have access to a grid supply. DIY electricity only becomes cost-effective in factories that need *huge* amounts of power. -- Cynic |
#16
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questions about fuel and generators (incl. a legal one)
Most of the potential problems in doing this, as highlighted on this
thread, are to do with needing 240VAC. If you can get by with 12vdc you reduce the cost & complexity manifold. Genset / Photovoltaics would recharge your battery bank. Think about it - LCD televisions that use an external 'brick' PSU are often 12vdc, as are a lot of consumer appliances. Lighting would be a doddle with LEDs. What will catch you out are fridge/freezers, washing machines & the like. |
#17
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 06:12:02 -0700 (PDT), Phil
wrote: Most of the potential problems in doing this, as highlighted on this thread, are to do with needing 240VAC. If you can get by with 12vdc you reduce the cost & complexity manifold. Genset / Photovoltaics would recharge your battery bank. Think about it - LCD televisions that use an external 'brick' PSU are often 12vdc, as are a lot of consumer appliances. Lighting would be a doddle with LEDs. Lighting is no problem with 12V (though you'll probably have to DIY if you want LED lighting), but if you look at the output voltage of all the "bricks" you have, ITYF that the voltages vary greatly from 5V to 24V or even higher. A 12V "brick" is one of the most common, but I'd be surprised if as many as half of the ones you have are at that voltage. OTOH low power 12V invertors are cheap enough that you could buy one for each item that uses a "brick" PSU. What will catch you out are fridge/freezers, washing machines & the like. Yup, and they need a very sizable invertor. Don't go by their rated power consumption - with many appliances it is the switch-on surge current required that limits them to needing a *big* invertor. Vacuum cleaners are also big-power items. You can buy 12V fridges, freezers and microwave ovens for boats and caravans, but they are a heck of a price! Small 12V kettles are also available. You can buy PC PSUs that run from 12V - again many times the price of the equivalent mains units. You can also get gas and paraffin fridges and freezers, which would probably be better than running from 12V. The battery for a house would probably have to be very sizable if to want to keep the charge cycle down to an hour or two per day. Batteries on continuous cycles do not last all that long. Just the cost of replacing the battery bank every 3 to 5 years is quite likely more than your electricity bills over the same period! -- Cynic |
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questions about fuel and generators (incl. a legal one)
Cynic, in article js4sv3lj0anbh6iu6sdg87o3ui3fhlu77l@
4ax.com, says... Lighting is no problem with 12V (though you'll probably have to DIY if you want LED lighting), but if you look at the output voltage of all the "bricks" you have, ITYF that the voltages vary greatly from 5V to 24V or even higher. A 12V "brick" is one of the most common, but I'd be surprised if as many as half of the ones you have are at that voltage. OTOH low power 12V invertors are cheap enough that you could buy one for each item that uses a "brick" PSU. .... and be careful that the device can run off a 12v battery source, which ranges from some 11v to over 14v from discharged to charging. "12V" is actually getting quite flat (25-30%) for lead-acid... -- JohnW. Replace the obvious with co.uk in 2 places to mail me. |
#19
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questions about fuel and generators (incl. a legal one)
On 10 Apr, 14:34, Cynic wrote:
On Thu, 10 Apr 2008 06:12:02 -0700 (PDT), Phil wrote: Most of the potential problems in doing this, as highlighted on this thread, are to do with needing 240VAC. If you can get by with 12vdc you reduce the cost & complexity manifold. Genset / Photovoltaics would recharge your battery bank. Think about it - LCD televisions that use an external 'brick' PSU are often 12vdc, as are a lot of consumer appliances. Lighting would be a doddle with LEDs. Lighting is no problem with 12V (though you'll probably have to DIY if you want LED lighting), but if you look at the output voltage of all the "bricks" you have, ITYF that the voltages vary greatly from 5V to 24V or even higher. *A 12V "brick" is one of the most common, but I'd be surprised if as many as half of the ones you have are at that voltage. *OTOH low power 12V invertors are cheap enough that you could buy one for each item that uses a "brick" PSU. What will catch you out are fridge/freezers, washing machines & the like. Yup, and they need a very sizable invertor. *Don't go by their rated power consumption - with many appliances it is the switch-on surge current required that limits them to needing a *big* invertor. *Vacuum cleaners are also big-power items. You can buy 12V fridges, freezers and microwave ovens for boats and caravans, but they are a heck of a price! *Small 12V kettles are also available. *You can buy PC PSUs that run from 12V - again many times the price of the equivalent mains units. You can also get gas and paraffin fridges and freezers, which would probably be better than running from 12V. The battery for a house would probably have to be very sizable if to want to keep the charge cycle down to an hour or two per day. Batteries on continuous cycles do not last all that long. *Just the cost of replacing the battery bank every 3 to 5 years is quite likely more than your electricity bills over the same period! -- Cynic Putting the cart before the horse ! If you wanted to go off-grid, what I am saying is that you should consider designing your house & appliances from the outset to use only 12vdc. Phil. |
#20
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questions about fuel and generators (incl. a legal one)
On 10 Apr, 15:52, Phil wrote:
If you wanted to go off-grid, what I am saying is that you should consider designing your house & appliances from the outset to use only 12vdc. Why only 12V? Go DC by all means, but 48V is easy and even "mains voltage" DC systems with battery backup are practical, so long as you know what you're doing ("mains" switches don't like breaking a DC load). Distributing any sort of useful power at low voltages gets difficult from the high current, extra losses and extra cabling costs. If you really are going for Hobbit-technology and building the lot from recycled car batteries, but a separate battery and automatic charger into each light fitting and keep the premises wiring at 240V AC from the genset. You'd be using a bunch of batteries anyway, the wiring costs make it sensible to distribute them close to the loads. |
#21
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questions about fuel and generators (incl. a legal one)
On 10 Apr, 17:05, Andy Dingley wrote:
On 10 Apr, 15:52, Phil wrote: If you wanted to go off-grid, what I am saying is that you should consider designing your house & appliances from the outset to use only 12vdc. Why only 12V? Go DC by all means, but 48V is easy and even "mains voltage" DC systems with battery backup are practical, so long as you know what you're doing ("mains" switches don't like breaking a DC load). Distributing any sort of useful power at low voltages gets difficult from the high current, extra losses and extra cabling costs. If you really are going for Hobbit-technology and building the lot from recycled car batteries, but a separate battery and automatic charger into each light fitting and keep the premises wiring at 240V AC from the genset. *You'd be using a bunch of batteries anyway, the wiring costs make it sensible to distribute them close to the loads. 12vdc because of the range of items that already use it, with careful choice. As I said, my idea was to plan the entire house wiring from scratch to cope, not to retrofit to cope with the OTT loads we all have now; ie./ it wouldn't necessarily be a 1:1 functional replacement. Phil. |
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questions about fuel and generators (incl. a legal one)
Cynic wrote:
snip You can buy 12V fridges, freezers and microwave ovens for boats and caravans, but they are a heck of a price! Small 12V kettles are also available. You can buy PC PSUs that run from 12V - again many times the price of the equivalent mains units. Surely the PC is the easy part - there are car adaptors for most laptops. Andy |
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 20:18:31 +0100, Andy Champ
wrote: Cynic wrote: snip You can buy 12V fridges, freezers and microwave ovens for boats and caravans, but they are a heck of a price! Small 12V kettles are also available. You can buy PC PSUs that run from 12V - again many times the price of the equivalent mains units. Surely the PC is the easy part - there are car adaptors for most laptops. I was referring to the PSU in a full size PC. -- Cynic |
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson
wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: uk.rec.engines.stationary Mike -- http://www.corestore.org 'As I walk along these shores I am the history within' |
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questions about fuel and generators (incl. a legal one)
On Apr 10, 11:12*am, Mike Ross wrote:
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: uk.rec.engines.stationary Mike --http://www.corestore.org 'As I walk along these shores I am the history within' Not the least of concerns is fuel storage and leakage from same. Leaks from tanks and fuel lines have here (Canada) cost householders in some cases thousands! In many instances not being covered by homeowners liability insurance. When 'oil' is used, household insurance premiums can often be higher if liquid fuel is used because of the potential for leaks. By certain mandated dates; storage tanks, in most provinces of Canada, must now have a 'sump' and/or be constructed in such a way that there is a weir or catchment around them, capable of holding 100% of the full contents. The catchment device often being integral with the tank. As a result tanks now cost much more than in the past, are bigger and more unwieldy etc. Oil that leaks into the ground can travel long distances and pollute the property of others. In several instances the excavation s have been huge and have extended onto other properties at great cost for restoration! In one case in St. John's Newfoundland, the hole was so large that the owners built a complete sub-ground basement and addition to their home in an area that had been an oil soaked parking lo ! It is understood that in some cases leakage only became apparent when increasing costs for fuel oil caused homeowners to check the 'quantities' of oil being bought! Thus oil leakage had been going on for some time! Electricity produced by water power would seem the 'safest' from an environmental viewpoint. But then there is usually flooding and water back up! Sometimes with dire consequences. The next safest being, and perhaps less polluting, being nuclear? But then there was Chernobyl, and 3 Mile island etc. etc. Must go and throw on another bit of wood scrap and plug in the electric kettle for a cuppa! Maybe the somw will be gone in another few weeks; maybe by early-mid May! |
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questions about fuel and generators (incl. a legal one)
On Apr 10, 11:12*am, Mike Ross wrote:
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: uk.rec.engines.stationary Mike --http://www.corestore.org 'As I walk along these shores I am the history within' Not the least of concerns is fuel storage and leakage from same. Leaks from tanks and fuel lines have here (Canada) cost householders in some cases thousands! In many instances not being covered by homeowners liability insurance. When 'oil' is used, household insurance premiums can often be higher if liquid fuel is used because of the potential for leaks. By certain mandated dates; storage tanks, in most provinces of Canada, must now have a 'sump' and/or be constructed in such a way that there is a weir or catchment around them, capable of holding 100% of the full contents. The catchment device often being integral with the tank. As a result tanks now cost much more than in the past, are bigger and more unwieldy etc. Oil that leaks into the ground can travel long distances and pollute the property of others. In several instances the excavation s have been huge and have extended onto other properties at great cost for restoration! In one case in St. John's Newfoundland, the hole was so large that the owners built a complete sub-ground basement and addition to their home in an area that had been an oil soaked parking lot! It is understood that in some cases leakage only became apparent when increasing costs for fuel oil caused homeowners to check the 'quantities' of oil being bought! Thus oil leakage had been going on for some time! Electricity produced by water power would seem the 'safest' from an environmental viewpoint. But then there is usually flooding and water back up! Sometimes with dire consequences. The next safest being, and perhaps less polluting, being nuclear? But then there was Chernobyl, and 3 Mile island etc. etc. Must go and throw on another bit of wood scrap on the wood stove and plug in the electric kettle for a cuppa! Maybe the snow will be gone in another few weeks; maybe by early-mid May! |
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson
wrote: Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? You could run a diesel engine on paraffin mixed with lubricating oil but I would be concerned about damage to the engine. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? Not really practical as it would involve getting a steam engine to drive the genny 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? This is the best, if noisiest idea. Get hold of a Lister Start-o-matic which automatically switches on when a light or power switch is put on in the house. Contact R. A. Lister & Co of Dursley, Gloucestershire and find out if they are still available. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? It is both feasable and legal but is a lot of hassle. Diesel oil for stationary engines has no duty on it and you buy it from a distributor in bulk. I don't know whether it has VAT or not. It is called Gas Oil although it is ordinary diesel but dyed red. Cheers, john This is quite normal but unless you use wind power or hydro-electricity, it is likely to be more expensive than mains. From a legal point of view, you can generate your electricity from any fuel you like except, possibly, nuclear energy which is tightly regulated. I have answered your specific questions above. |
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 16:07:46 +0100, Alasdair wrote:
4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? It is both feasable and legal but is a lot of hassle. Well aside from having to collect it in 20l containers rather than delivered in bluk I can't see cooking oil being any more hassle. The ethics of using food for fuel is another matter... Diesel oil for stationary engines has no duty on it ... Red diesel does have duty on it but only 9.69p/l(*) compared to the 50p+/l of road (white) diesel. (*) 10.07p/l if the rise that was due on 1st April happened. The 2p rise on road fuel duty was delayed in the Budget, I don't know if this one was. The HMR&C site hasn't been updated yet... I don't know whether it has VAT or not. It is called Gas Oil although it is ordinary diesel but dyed red. Yes it has VAT at 17.5% applied after the duty. -- Cheers Dave. |
#29
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questions about fuel and generators (incl. a legal one)
John Nagelson wrote:
Hello, I am considering taking a house 'off grid', and would be grateful for help with some of the following questions: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? Its virtually the same as red diesel, so a diesel genny is a good thing to try. In the power cuts of the 70's the place I worked aty had one..we tried a ford 2 liter petrol but it couldn't take running at decent power continuously, and it was swapped for a truck motor. I think about 3-4 litres. Perkins probably. You probably don't need more than about 10KVAwhich is about 15bhp, so a small economical diesel around 1 lites and a tad is probably not a bad choice. Cut one out of a scrapper car, along with mounts, and hook up to a generator..you will need to run it at 3000 RPM, which is not a bad rev range for a diesel. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? Almost impossible: you need blown boiler steam type plant. Mind you if you DO put a steam turbine in teh back yard, you can burn all sorts of stuff on it, but beware. Boilers need stringent sfatey ceks and a lot of 'chimney sweeping'. The main reaoson they vanished from railways was the super high maintenance. 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Buy heating oil. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Dunno about legal, but those sorts of oils do bad things to diesel injectors. Anorther possibility is a crap small gas turbine out of a small aircarft. I dont know of anything between 'model jets' and 'fukls size airfract jets' but there maty in fact be something. If you can use teh waste heat these aren't a bad bet. In any case whatever you use, pump any coolant or exhaust stuff into a heat exchanger for hot water and CH usage. Cheers, john |
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questions about fuel and generators (incl. a legal one)
On Thu, 10 Apr 2008 18:51:24 +0100, The Natural Philosopher wrote:
Cut one out of a scrapper car, along with mounts, and hook up to a generator..you will need to run it at 3000 RPM, which is not a bad rev range for a diesel. 3000 rpm on my diesel car engine is thrashing it a bit it's happier at around 2250... The 3000rpm also assume direct drive and two(?) pole alternator. You can get 4 pole which run at 1500rpm. I think the Lister sets run at 1500rpm. You can also gear it with a box or pullys and belt. The biggest snag with a scrapper engine will be keeping the rpm constant (or at least within a few percent) with step changes in load. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? Almost impossible: you need blown boiler steam type plant. You could use a conventional steam engine, there is a sequence of development pictures and text of just that on the web somewhere. Generates a reasonable amount of power as well. I suspect I may have followed a link recently posted in uk.rec.engines.stationary. Even relatively low pressure boilers have some hefty safety regulations to comply with though. Boilers going bang is not good, bye bye building sort of not good... 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Buy heating oil. Or Red diesel. Heating oil for domestic heating attract 5% VAT, I suspect other uses should have VAT applied at 17.5%. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Dunno about legal, but those sorts of oils do bad things to diesel injectors. Legal in a stationary engine and legal up to 2500l/rolling year in a road vehicle without telling HMR&C. You do need to keep records though. Bear in mind that even cheapo cooking oil is still about 80p/l. Red diesel is less than that I think somewhere around 60p/l, might be a bit more. It's not so much the injectors as the pump seals. Some are OK with VO others fail in short order. In any case whatever you use, pump any coolant or exhaust stuff into a heat exchanger for hot water and CH usage. I'd agree with that, dump the "waste" heat into a heat bank/store of some sort. But look at those fuel prices, a litre of 28sec oil burnt in an hour produces just over 10kW. So even at 100% effciency you are looking at 6 to 8p/unit. If you can get 50% you'd be doing well, 12 to 16p/unit... -- Cheers Dave. |
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questions about fuel and generators (incl. a legal one)
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Dave Liquorice" saying something like: The biggest snag with a scrapper engine will be keeping the rpm constant (or at least within a few percent) with step changes in load. 'Hoof' engine governor. You can find one on ebay.com -- Dave |
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questions about fuel and generators (incl. a legal one)
On Fri, 11 Apr 2008 14:02:31 +0100, Grimly Curmudgeon
wrote: 'Hoof' engine governor. You can find one on ebay.com Welland governors are reasonably accurate. -- Alasdair. |
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questions about fuel and generators (incl. a legal one)
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember Alasdair saying something like: On Fri, 11 Apr 2008 14:02:31 +0100, Grimly Curmudgeon wrote: 'Hoof' engine governor. You can find one on ebay.com Welland governors are reasonably accurate. Depends on what the surplus situation is. Hoof are easily available cheaply and are quite good for mounting on VW diesels. I'll have a look for Welland, ta. -- Dave |
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questions about fuel and generators (incl. a legal one)
We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember John Nagelson saying something like: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? Don't, just don't. Kerosene has nothing like the same lubricity as diesel, and you run the risk of wrecking your injection pump. Kerosene can be used if you are utterly sure of what you're doing, by adding mineral oil to it in the right proportion. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? Steam raising is fraught with danger, but not impossible. The fact you are asking the question points that you are not that able to do it safely. 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Red diesel is the thing for that, but HM Gov have bumped up the price of it now. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Of course it is - safe, practicable and legal too. You really need to do some research on your own, though. As a starting point, do a google search for this very subject and spend a couple of weeks absorbing knowledge. -- Dave |
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questions about fuel and generators (incl. a legal one)
Grimly Curmudgeon wrote:
We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember John Nagelson saying something like: 1) how easy is it to run an generator fuelled by PARAFFIN(known in the US as 'kerosene', i.e. '28sec', the type of oil used in most oil- powered domestic heating systems in the UK)? Don't, just don't. Kerosene has nothing like the same lubricity as diesel, and you run the risk of wrecking your injection pump. Kerosene can be used if you are utterly sure of what you're doing, by adding mineral oil to it in the right proportion. 2) how easy is it to get hold of, and run, a generator fuelled by SOLID FUEL, e.g. coal or wood or both? Steam raising is fraught with danger, but not impossible. The fact you are asking the question points that you are not that able to do it safely. 3) how easy is it to run a generator fuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Red diesel is the thing for that, but HM Gov have bumped up the price of it now. 4) what about running an oil-fuelled generator on cheapo COOKING OIL? Is this practicable? Is it legal? Of course it is - safe, practicable and legal too. You really need to do some research on your own, though. As a starting point, do a google search for this very subject and spend a couple of weeks absorbing knowledge. -- Dave As has been said many times, taking an on-grid house off grid pretty much never makes sense. Just one thing I'd say though: a lot of people are talking about 10kVA plus gensets. If you want as much power as now minus heating, already, that's what it will take, but the norm is to dramatically reduce consumption first, such that 1.5kW peak is enough, and this can come from an invertor. Laptops replace desktops, 500w microwaves (1kW input) replace 800w, etc One or 2 not mentioned yet: Space heating: solar air & solid fuel. Space cooling: plant shading, whitewash, whole house fan, night time solar panels refrigeration: gas Hot water: concentrating solar, heat scavenging (invertor, genny etc) Lighting: fluorescent / CFL, not LED Washing machine: wind driven agitation if long wash times are acceptable NT |
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questions about fuel and generators (incl. a legal one)
"John Nagelson" wrote in message ... Hello, I am considering taking a house 'off grid', Why? |
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questions about fuel and generators (incl. a legal one)
On Apr 10, 9:36*am, "Anthony R. Gold" wrote:
On Thu, 10 Apr 2008 00:52:43 -0700 (PDT), John Nagelson wrote: 2) how easy is it to get hold of, and run, ageneratorfuelled by SOLID FUEL, e.g. coal or wood or both? That sounds VERY hard, requiring a boiler and steam turbine. Yes indeed - basically a steam engine, but there were a lot about in the UK until about 1950, although I guess maintenance would be a problem! 3) how easy is it to run ageneratorfuelled by DIESEL? And surely if you do, you don't have to pay petrol-station prices? Is there a legal way to avoid paying the excise? Diesel and kerosene are essentially the same but with different tax rates. Many thanks for this info, which is new to me! This means I could get a Honda diesel generator and keep the paraffin in the kind of tank used for fuelling heating systems. 4) what about running an oil-fuelledgeneratoron cheapo COOKING OIL? Is this practicable? Is it legal? I guess legal but smelly (assuming you mean used oil) with the same noise issues as fuel oil but also problems with moisture contamination and corrosion, securing a reliable source and performing whatever filtering and purification are needed. *It may also have problems of solidifying in cold weather. I meant buying big bottles of economy cooking oil from Asda's, as some people do for unlawful use in their cars. I think using it in a generator would be lawful (unless someone on uk. legal otherwise). You never asked about LPG/propane which is another possibility. *I run a 40kW LPG generator with automatic transfer just as a backup during power failures in a place where the power does fail all too regularly. Quite a lot of kW! Hadn't considered LPG. Is it poss to get smaller generators using this as fuel? Cherers, John |
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questions about fuel and generators (incl. a legal one)
I meant buying big bottles of economy cooking oil from Asda's, as some people do for unlawful use in their cars. I think using it in a generator would be lawful (unless someone on uk. legal otherwise). Perfectly legal for road use since changes in the revenue regulations: http://www.hmrc.gov.uk/briefs/excise-duty/brief4307.htm However the price of new vegetable oil has doubled in the last 12 months or so to around £1 / litre - so only just compares favourably with road diesel - and is totally uneconomic compared to kerosene for non-road applications. |
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questions about fuel and generators (incl. a legal one)
On Apr 10, 10:24*am, " wrote:
I meant buying big bottles of economy cooking oil from Asda's, as some people do for unlawful use in their cars. I think using it in a generator would be lawful (unless someone on uk. legal otherwise). Perfectly legal for road use since changes in the revenue regulations: http://www.hmrc.gov.uk/briefs/excise-duty/brief4307.htm Someone who buys it from Asda's as cooking oil still needs to pay 27.1 pence per litre to the government in tax if they use it as vehicle fuel: http://www.vegoilmotoring.com/eng/legal-stuff John |
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questions about fuel and generators (incl. a legal one)
Someone who buys it from Asda's as cooking oil still needs to pay 27.1 pence per litre to the government in tax if they use it as vehicle fuel: http://www.vegoilmotoring.com/eng/legal-stuff John Out of date website. New regulations came into force 30th June 2007. |
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