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14.20 Heat exchanger

A simple heat exchanger.

Equations:	1
Data:
TRi:	Inlet temperature of refrigerant (in Kelvins).
TRf:	Outlet temperature of refrigerant (in Kelvins).
dR/dt:	Flow of refrigerant (in cubic meters per second).
cR:	Specific heat of refrigerant (in J/kg*K).
TFi:	Initial temperature of fluid (in Kelvins).
TFf:	Outlet temperature of fluid (in Kelvins).
dF/dt:	Flow of fluid (in cubic meters per second).
cF:	Specific heat of fluid (in J/kg*K).