Tim Streater wrote:
In article
,
harry wrote:

On Jul 11, 7:21 pm, John Rumm wrote:
On 11/07/2012 17:08, Arfa Daily wrote:


http://m.dailymail.co.uk/money/inves...1/MIDAS-Will-f...

Anyone know anything about these, or the technology employed ? I
dunno,
but it feels like one of those "If it seems too good to be true ... "
things. Or is it just another company jumping on the eco-bollox
bandwagon
Sounds like a variation on the rent your roof scheme so that suppliers
of the kit can reap the rewards of feed in tariffs etc.

Problem is that is shifts yet more of our generation capacity to gas at
a time where they are bleating about carbon reduction.

You are missing the point.
The point is, it recovers otherwise wasted heat and generates
electricity at point of use so making the overall process very
efficient.

Which waste heat is that then, harry? My new boiler is condensing. That
means the exhaust gases are well below 100C, AIUI.

Power stations already have, and have had for a long time, high and low
pressure turbines, so that after the high pressure steam has expanded
and cooled once, the trick is repeated at a lower temp and pressure. Sad
thing is, that as temp and pressure get lower, turbine size needed gets
bigger.

I wonder how big a turbine I'd need hanging off my oil boiler flue so
that the ****er actually *rotated*.

Any engineers here care to hazard a guess?


you could use a gas turbine...model ones are a couple of thousand and
about 5% efficient.

--
To people who know nothing, anything is possible.
To people who know too much, it is a sad fact
that they know how little is really possible -
and how hard it is to achieve it.