Didn't Winston Churchhill say "Lies, Damn Lies and Statistics" ?? You can generally use statistics to "prove" whatever you want. ( A bit = like the way you fill out a tax return - Start with figuring out how much re= bate you feel you can get away with & then justify it) RP One of Sweden's biggest energy companies, Vattenfall, did a study about= this (Stirling for heat and electricity generation for residential use)= some years ago but the results was mostly negative. I'm not sure that there results can be trusted as they probably don't want this to come true for ecomnomical reasons... /Ake -----Ursprungligt meddelande----- Fr=E5n: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]F=F6r Richard.Prosser@POWERWARE.COM Skickat: den 6 april 2004 22:35 Till: PICLIST@MITVMA.MIT.EDU =C4mne: [OT]: Superb low temperature differential Stirling Engine 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----- Fr=E5n: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]F=F6r Richard.Prosser@POWERWARE.COM Skickat: den 6 april 2004 22:07 Till: PICLIST@MITVMA.MIT.EDU =C4mne: [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----- Fr=E5n: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]F=F6r Ake Hedman Skickat: den 6 april 2004 11:02 Till: PICLIST@MITVMA.MIT.EDU =C4mne: 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 120= 0 C 1200 + 273 - 300 / 1475 =3D 79% 1/3 =3D> 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 =3D 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? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads = -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads