Quote:
Originally posted by jtroutma
My only problem with that argument Gmat with that link is that.... those are cars and engines running at temperatures that we never want to get even close to.
Our systems run at much lower temperatures and much closer to ambient than a car radiator system runs at. For a car cooling system, I agree. But I think that with our system we need to also take into account that we have much lower heat sources, lower efficency radiators, AND water temps much closer to ambient.
That is where I am running into a problem with that argument.
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And whats the difference with cars ?
1 - our rads are the same
2 - pumps have about the same rate
3 - car cooling gets less efficient due to boiling water problems. But one wants to avoid this in most engines...
4 - from an engineering standview those systems are *exactly* the same, same formulas, same setup, same problems, etc...
Please explain clearly the difference.
Dont forget the Q=UAdT ...
(edit) hint: our dT is lower. That means our Q (heat tranfer) is lower. And so what, work at a given dT and see what reducing U (direct factor of flow) or A (area) does to Q...