My mum´s house, built 1974, has a conventional oil fired central
heating system which supplies hot water to a cylinder and radiators.
The house is in an area with very good wind resource. I want to install
a small wind turbine to supplement the oil fired heating system. The
wind turbine I wish to use has a maximum power output of 1.4kW. The DC
output voltage can be either 12v, 24v or 48v. In windy weather it can
produce 33kW per day.

I wonder what is the best way to tie the wind power into the central
heating system. I have considered the following possibilities:

1. Install a suitable low voltage 1.5kW water heater in or connected to
the cylinder. This should provide lots of hot water but no much thru
the radiators. Can you recomend a suitable water heater?

2. Install a suitable low voltage 1.5kW water heater on the cold water
input pipe to the boiler. Leave the boiler on low so that the pump will
circulate the water thru the radiators and cylinder. Can you recommend
a suitable water heater?

I would greatly appreciate any advice you may have.

Thanks in anticipation.

On 14 Mar 2006 11:48:17 -0800, wrote:

In windy weather it can produce 33kW per day.

kilowatt what?


--

Matt wrote:
On 14 Mar 2006 11:48:17 -0800, wrote:


In windy weather it can produce 33kW per day.


kilowatt what?



Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.


To the OP - good luck, mate. I'd look towards the higher voltage setting
(48v) to simplify distribution, then check this link for a US
distributor of a 48v, 30A (1440W) water heating element:-

http://www.realgoods.com/renew/shop/...204/ts/1025078

On Tue, 14 Mar 2006 20:46:30 UTC, Mike Dodd
wrote:

Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.

The point being made was that the units were mixed - 1.4kW is the power
rating. He probably meant 33kWh (kilowatt-hours) per day, of course (1.4
x 24 isn't far off that).

The measurement of 1.4kW/hr is meaningless, as a watt is (simply) a
measure of power output, not total power - kilowatts *per hour* cannot
mean anything sensible here. Again, I suspect that you also mean
kilowatt-hours (kWh), in other words a certain number of kilowatts
sustained for a pewriod of an hour.

So there!
--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
Avenue Supplies, http://avenuesupplies.co.uk

Bob Eager wrote:
On Tue, 14 Mar 2006 20:46:30 UTC, Mike Dodd
wrote:


Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.


The point being made was that the units were mixed - 1.4kW is the power
rating. He probably meant 33kWh (kilowatt-hours) per day, of course (1.4
x 24 isn't far off that).

The measurement of 1.4kW/hr is meaningless, as a watt is (simply) a
measure of power output, not total power - kilowatts *per hour* cannot
mean anything sensible here. Again, I suspect that you also mean
kilowatt-hours (kWh), in other words a certain number of kilowatts
sustained for a pewriod of an hour.

So there!

Agreed. Remind me to engage brain next time

Mike Dodd wrote:

Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.

I think perhaps you need to brush up on your basic physics - your (and
the OP's) usage of kW makes no sense.

--
Grunff

Grunff wrote:
Mike Dodd wrote:

Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.


I think perhaps you need to brush up on your basic physics - your (and
the OP's) usage of kW makes no sense.


As previous reply - yes, needed to engage brain. Sad thing is not just
basic physics but classically trained with E&E eng through Uni. Was too
eager to jump onto a non-value-added reply. You're quite right, though,
that original units were ambiguous / wrong. The basic premise, however,
that the OP wanted to heat his mother's water by 1.4kWhr all day should
still be obvious, and the link to the American website (pah!) with the
48v heater element still addresses the OP's query. "no sense" -
agreed, the details were incorrect, however, would not require a massive
leap of faith to understand and answer OP's question.

Mike Dodd wrote:
Grunff wrote:

I think perhaps you need to brush up on your basic physics - your (and
the OP's) usage of kW makes no sense.


As previous reply - yes, needed to engage brain.


Needless to say, I posted that before your reply to Bob had reached my
server - I wasn't just hammering the point home :-)


--
Grunff

The message
from Mike Dodd contains these words:

Huh?, thought that was pretty obvious from the OP - 33kW per day.

Nope - still doesn't make sense. Do you reckon he means 33kW
continuously for a whole day - that'd be 792kWh.

Or perhaps it's 33 kWh in a day - that's an average of a little less
than 1.4kW continuously across a day.

--
Skipweasel
Pay no attention to the man behind the curtain.

"Guy King" wrote in message
...
The message
from Mike Dodd contains these words:

Huh?, thought that was pretty obvious from the OP - 33kW per day.

Nope - still doesn't make sense. Do you reckon he means 33kW
continuously for a whole day - that'd be 792kWh.

What do you think? What do you *really* think?

Or perhaps it's 33 kWh in a day - that's an average of a little less
than 1.4kW continuously across a day.

--
Skipweasel
Pay no attention to the man behind the curtain.

The message
from Matt contains these words:

In windy weather it can produce 33kW per day.

kilowatt what?

Seconds?

--
Skipweasel
Pay no attention to the man behind the curtain.

wrote:

I would greatly appreciate any advice you may have.

Why not use something easier like....
http://www.renewabledevices.com/swift/index.htm

Then, Electricity supplier dependent, just use generated power to
supplement daily electricity use (including immersion heater or
whatever), and sell un-used power back to the electricity company.

That's what I am hoping to do as and when we get plans drawn up for
house/garage/roof changes. As we get the full force of prevailing
S.Westerly winds coming up the Severn.

--
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On 14 Mar 2006 11:48:17 -0800, wrote:

My mum=B4s house, built 1974, has a conventional oil fired central
heating system which supplies hot water to a cylinder and radiators.
The house is in an area with very good wind resource. I want to install
a small wind turbine to supplement the oil fired heating system. The
wind turbine I wish to use has a maximum power output of 1.4kW. The DC
output voltage can be either 12v, 24v or 48v. In windy weather it can
produce 33kW per day.

I wonder what is the best way to tie the wind power into the central
heating system. I have considered the following possibilities:

1=2E Install a suitable low voltage 1.5kW water heater in or connected to
the cylinder. This should provide lots of hot water but no much thru
the radiators. Can you recomend a suitable water heater?

2=2E Install a suitable low voltage 1.5kW water heater on the cold water
input pipe to the boiler. Leave the boiler on low so that the pump will
circulate the water thru the radiators and cylinder. Can you recommend
a suitable water heater?

I would greatly appreciate any advice you may have.

Thanks in anticipation.

Use the wind turbine to power the lighting via a set of storage
batteries.

Use the electricity saved to run an immersion heater!

sponix

I would greatly appreciate any advice you may have.

Spend what you would have spent on a wind turbine on insulation, draft
proofing and the construction of a porch. Then buy a windmill for 50p
from a toy shop, build a sandcastle in the back garden and plonk it in
the top.

As an alternative stick the money you would have spent on a wind
turbine in a high interest savings account.



--