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| Powere sources for a stirling |
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| madjackghengis:
Hi John, didn't want to push you on the issue, but I've dropped my share of carefully machined bits and pieces, and don't much care for having to redo what I've just finished. I've just gone through the whole of your log, and got a better understanding of the many issues which have come out in it. I try to salvage everything which once worked doing anything, and have several old coffee makers, disassembled, and their "hot plate" for keeping the pot warm would probably work fairly well, they have a thermostat in them, to keep it below boiling, if you put a diode that will carry ten amps, such as a 4004, you cut the heat in half, and would probably make it better for the LTD types, and even for the not so LTD, but close types. The same mod with the diode can be used in any electrical circuit of a/c, and cut your wattage in half, I've used it with an old coffee pot to keep wax melted, but not burning, for dipping sharpened tools to protect the edges, before. I've also got several "potential boilers" which have come from expresso machines, as I truly enjoy my expresso in the winter, when I can drink it, and while they don't meet esthetic standards as boilers, they probably would meet safety standards of the "safety police" who seem to poke noses into everything these days. By the way, what are you using for your displacer, if you don't mind my asking? :bugeye: mad jack |
| Bogstandard:
They are a little small in surface area Jack, I want to make a heated table to accommodate about eight to ten smallish Ltd engines. You can in fact buy small coffee mug warmers that plug into an USB port that could be used if you wanted a Ltd Sterling on your desktop. For my eggcup Stirlings, I used thin slivers of building foam (about 3mm or 1/8" thick) for the displacement pistons, but now I have some thin acrylic (2mm), which I will use when they are rebuilt. I have noticed that the foam is 'sagging' slightly and is going slightly mis-shapened after being in there a couple of years. Even very light materials succumb to gravity after a while, especially when supported at just one point. John |
| madjackghengis:
Hi John, while I've not yet built an LTD stirling, from the way most are made, it would seem pretty natural for them to run upside down just as well, since all the movement is verical except the rotation of the flywheel. That double engine Peltier device idea ought to work out pretty well as long as everything is pretty well balanced. :bugeye: mad jack |
| Bogstandard:
Jack, I just might try that out on the eggcup ones I have yet to assemble. John |
| John Stevenson:
--- Quote from: bogstandard on December 29, 2010, 05:45:19 PM --- Anyway, the bearings turned up today for me to carry on with this Division Master topic. So the postings about heat sources and Sterling engines is now closed. Many thanks to all those who contributed, it has given me a lot to think about. John --- End quote --- Thank Christ for that......................... |
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