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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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9.6 kW garage heater question -- coils too hot?
On Tue, 17 Jan 2006 04:29:10 GMT, Ignoramus7637
wrote: http://igor.chudov.com/projects/Garage-Heater/ I am making this garage heater so that working in my garage is less painful in winter. It has a 9.6 kW heating element. I made some photos, some with flash and some (out of focus) without flash. The ones without flash make condition of coils a little more visible. The heater is not done yet, it needs a few extras, although it is working. The case that it is in is a case from an old "die attachment evaluator". My question is, are the coils too hot or not. Any ideas? i Look at the fan on a 30,000 BTU/hr heater. Now look at your muffin fan. Then look at the squirrelcage blower in a typical residental 80,000 BTU/hr FA gas furnace. Look again at your muffin fan. The coils are not running too hot for survival; electric radiant heaters glow similarly, as do the coils or strips in a toaster. But if your objective is to heat a volume of air in a space, then you need to move some significant portion of the air in that space thru the coils in a reasonable length of time, and you need some air velocity over the coils and ductwork to do it. |
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