Since87,
I hear you on the EE bit. I'm an ME, and I prefer it 'cause I can SEE what's happening (at least usually). Darn double-Es deal with all the crap that can't be DIRECTLY observed (and I'm not talking about observing a meter, LOL).
As Bill pointed out, your "model" is a little hazy, but if it works for you I suppose that's fine. Ya got the gist of the overall picture as far as I can tell.
Bill,
You mentioned that you should be able to measure the effect on the waterblock. You already are. You're trying to detect it with a thermometer rather than relying on your pressure and flow readings. If you really wish to convince yourself and measure it thermally, you're going to need a lot more pressure. Get yourself a positive displacement pump with some balls, insulate the bejeezus out of a valve, then monitor temperature and pressure on each side of the valve (along with flow rate). Once you convince yourself of the reality, you can forget about trying to measure such minute temperature changes and rely on your pressure/flow readings to determine the energy.
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