SCFH standard cubic feet

Saturated propane vapor at 2.00 x 10 psia is fed to a well-insulated heat exchanger at a rate of 3.00 X 10 SCFH (standard cubic feet per hour). The propane leaves the exchanger as a saturated liquid (i.e., a liquid at its boiling point) at the same pressure. Cooling water enters the exchanger at 70°F. flowing cocurrently in the same direction) with the propane. The temperature difference between the outlet streams (liquid propane and water) is 15°F. 

Current air flow to reaction furnace, standard cubic foot per hour (SCFH) AP,j = Design pressure at the reaction furnace inlet, psig F(j = Design air flow to reaction furnace, SCFH... 

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