On 19/05/2021 23:23, Max Demian wrote:
On 19/05/2021 17:55, Andrew wrote:
On 18/05/2021 23:15, Tim+ wrote:
Theo wrote:
Steve Walker wrote:
Not really when modern condensing boilers are up to 94% efficient -
which is significantly better than even combined cycle generators ...
and that's before transmission losses of around 20%.

It's hard to beat heat pump efficiency of 200-400%, even with
transmission
losses.

But per kWhr, electricity is a lot more expensive than gas.

Only because the cost of all the 'green' stuff, plus all the
'warm house' freebies handed out to people on benefits are
loaded onto electricity bills. Maybe it is time to spread
them over gas and electric bills ?.

No, it's because of the second law of thermodynamics.

Efficiency = (input temp - output temp)/(input temp) for a heat engine.

A gas power station is 30-50% efficient, the rest being waste heat
unless you can use it for something like district heating.

A combined cycle plant should get your generating efficiency up into the
50% - 60% range.


--
Cheers,

John.

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