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** **## Re: Quick Easy Formula for Heat Exchangers

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### Comments

In the most basic terms, if you don't have any loss to ambient,
the heat rate you put into your exchanger must be what is coming out.
m(h2-h1)=m*(h1*-h2*)
where m=mass flow rate of fluid 1 in lbm/hr
h1=enthalpy of fluid 1 at inlet in btu/lbm
h2=enthalpy of fluid 1 at outlet in btu/lbm
*=fluid2

The more lbm/hr you can push generally increases
your heat xfer. There are more complicated formulie
when you get into the counter-flow, once-through,
twice through, etc.

Hope this helps.

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