16.5 kg/s of the product at 6500C (Cp= 3.55 kJ/kg K), in a chemical plant are to be used to heat 20.5 kg/s of the incoming fluid from 1000C (Cp= 4.2 kJ/kg K). If the overall heat transfer coefficient is 0.95 kW/m2K and the installed heat transfer surface is 44 m2. Calculate the fluid outlet temperature for the counter flow and parallel flow arrangements.

Given,

ṁh=16.5 kg/s (Mass flow rate of Hot fluid)

th1=650℃=923K (Entry Temperature of Hot fluid )

Cph=3.55 kJ/kgK = 3550 kJ/kgK (Specific Heat of Hot fluid)

ṁc=20.5 kg/s (Mass flow rate of Cold Fluid)

tc1=100℃=373K (Entry temperature of cold fluid)

Cpc=4.2 kJ/kgK = 4200 J/kgK (Specific Heat of Cold Fluid) …