Yeah. You may be right. Throwing 2kW of heat at this doesn't seem that
unreasonable to me. The warmed solution goes back into the tank, and after
it's all up to 68F then the output of the pump would be 86F, which seems
downright toasty! I'm not counting losses, and I have no idea if these
numbers are right. It just seemed like an interesting idea in my imagination.
-Steve
At 11:42 AM 1/14/02 -0800, Randall Young wrote:
>I haven't tried it, and I hate to knock things I haven't tried, but unless
>my envelope has slipped a digit, it may not be practical. Assuming your
>solvent weighs about 7 lb/gallon, your parts washer flows about 1 gpm, and
>the specific heat of the solvent is about 1 calorie/gram/degree C (same as
>water, actual value is probably slightly lower), I get 200 watts required to
>raise the flow by 1 degree C. So, to go from 50F to 68F (which would still
>feel cold), you would need 2kW of heater.
>
>The HF 20 gallon parts washer says it flows 50 gph. So for the same heat
>input (and a full 20 gallons of solvent), it's only going to take 25 minutes
>or so to warm the whole tank up. I think I'd go for less solvent in the
>tank (I only use 5 gal or so at a time), and maybe a timer that turns the
>tank heater on before I want to use it. It usually takes me a while to get
>the part off, anyway <g>
>
>Randall
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