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Determine the rate of heat removal:
Carbon dioxide passing through heat exchanger at rate of 100kg/hr is cooled down from 8000C to 500C. Write down the steady flow energy equation. Assuming that change in pressure, potential, kinetic energies and work interaction are insignificant; determine the rate of heat removal. (Take Cp = 1.08Kj/kg-K)
Sol: Given that:
mf = 100Kg/hr = 100/3600 Kg/sec = 1/36 Kg/sec
T1 = 8000C
T2 = 500C
Cp = 1.08Kj/kg-K
Rate of heat removal = Q = ? By Applying SFEE
As change in pressure, kinetic and potential energies and flow work interaction are negligible, that is;
Now
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