Page 430 - Handbook of Energy Engineering Calculations
P. 430
Calculation Procedure:
1. Determine the heat transferred in the heat exchanger
Use the relation, heat transferred, Btu/h = (flow rate, lb/h)(outlet temperature
– inlet temperature) (liquid specific heat)(1.8 to convert from °C to °F).
Substituting for this heat exchanger, we have, heat transferred = (32,800)(90
– 45)(0.9)(1.8) = 2,391,120 Btu/h (2522.6 kJ/h). This is the rate of heat
transfer from the hot fluid to the cool fluid.
2. Find the shellside outlet temperature
The temperature decrease of the hot fluid = (rate of heat transfer)/(flow rate,
