Unless the other 60% of this 90% was used to heat up the water/air for the
property ;-)

Dom

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of 0xDEADBEEF
Sent: 06 April 2004 23:43
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [OT]: Superb low temperature differential Stirling Engine


Taht's all bullshit... NO heat - force coupling engine can reach more
efficiency than 30%... May be they meant 90% of this maximum 30%

At last, no fuel burning engine can be the energy generator of the future!

> I do not belive the 90 percent efficiency claimed by them. It cannot be
> that good, due to the fact that there has to be major leakage (heat)
> between the hot side and the cold side of the piston. Even if the 'block'
> is plastic, there will still be a major heat loss. A burner (heat source)
> can be 90 percent efficient, but any moving parts are going to shoot their
> claimed efficiency specs down. If the efficiency was that good, they would
> be all over the place, especially in off the grid and isolated locations.
>
> Heat (as a byproduct) can be used to make cold air as well-so the unit
> could heat in winter and cool in summer.
>
> Flame suit on, fire away.
>
> Art
>
> At 04:34 PM 4/6/04, you wrote:
> >http://www.whispergen.com/
> >Trials appear to be underway but I haven'r heard much about them for a
> > year or so.
> >Richard P
> >
> >
> >
> >
> >
> >Do you have som epointer for more info about "Whispergen"?
> >
> >/Ake
> >
> >-----Ursprungligt meddelande-----
> >Fren: pic microcontroller discussion list
> >[mailto:PICLIST@MITVMA.MIT.EDU]Fvr Richard.Prosser@POWERWARE.COM
> >Skickat: den 6 april 2004 22:07
> >Till: PICLIST@MITVMA.MIT.EDU
> >Dmne: [OT:] Superb low temperature differential Stirling Engine
> >
> >
> >[Topic Added]
> >I think this is the philosophy behind the "Whispergen" stirling
> >engines. -
> >Electricity is produced as a by-product of home heating.
> >RP
> >
> >
> >
> >Sorry 137 KWh a day is the correct value.
> >
> >-----Ursprungligt meddelande-----
> >Fren: pic microcontroller discussion list
> >[mailto:PICLIST@MITVMA.MIT.EDU]Fvr Ake Hedman
> >Skickat: den 6 april 2004 11:02
> >Till: PICLIST@MITVMA.MIT.EDU
> >Dmne: SV: SV: ] Superb low temperature differential Stirling Engine
> >
> >
> >But if you use a higher temp difference.
> >
> >In my case I warm the house with pellets and say I have a stirling
> >engine in a pre stage to my heater. pellets burn with a temp around 1200
> >C
> >
> >1200 + 273 - 300 / 1475 = 79%  1/3 => 27% This goes to the electric
> >generator.
> >
> >I guess the losses are in heat so it can be used it to warm the house.
> >
> >I use about 1000 kg of pellets a week for warming in the winter ( big
> >house ). The total energy used a day is thus 1000 * 4.8kWh = 4800 KWh
> >Say I have 20% efficiency for the electivity generator I can take out
> >960 KWh a day in electric energy!!! and have the rest left to warm the
> >house.
> >
> >Do I have a fault in my thinking here?
> >
> >
> >
> >
> >
> >
> >
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