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 1200 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