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| Powere sources for a stirling |
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| DMIOM:
Have never been into (making) homebrew but they sometimes use low-level heating mats like these to aid fermentation. Dave |
| Bogstandard:
Jason, Now that looks a good idea, just need to find a reasonably priced one than heats continuously. Marv, I know exactly how you feel. Unfortunately, nowhere in the UK any more allows you to display with naked flame, or are very reluctant to let you do so, so I am actually making some tiny bunsens for the ones that normally have a meths or candle, hoping that will satisfy them. I used to display a fair amount at one time, but there are just a couple of local ones I would like to try to attend in the future. About the Peltier devices, good idea, will Stirlings work with cold on the bottom plate, and do low temp stirlings run when on their side or upside down, or would the friction be too much? Dave, I think they are the same as the vivarium heaters, just more expensive. John |
| mklotz:
John, Stirlings require only a temperature differential to run. They don't care which end is hot and which cold. At shows, I run my LTDs by sitting them on one of those freezer packs one can buy for use in picnic coolers. With the sun warming the top plate and the freezer pack cooling the lower plate they run quite nicely, albeit in the opposite direction of rotation from the heated lower plate configuration. My LTDs will run upside down but that may be a fluke. I suppose one could "pipe" the bottom side of the Peltier device to the (right side up) engine somehow. A thin aluminum or copper plate could act as a pipe. |
| NickG:
John, that's brilliant, really good. As Marv said, it would just run the other way if you cooled the bottom. Mine doesn't run (not that surprised, didn't have time to troubleshoot and there were a number of things I knew were iffy) but I've had to package it up for my dad's present tomorrow - pretty rubbish present though, just hope he can see that I've put quite a bit of effort into it :( . I guess I'll try to make another one for myself, maybe but got a stack of other projects to do too. Nick |
| Bogstandard:
Thanks very much for the info Marv, it gives me something else to think about now. Nick, I still haven't forgotten. When I get them finished, one of the burners, and a gas regulator, will be on it's way to you, for either your flame gulper or a hot cap Sterling, if you build one. Thank you everyone for your ideas on the heating solution. John |
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