Determine the area required in parallel flow heat exchanger to cool oil from 60C to 30C...

 

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Determine the area required in parallel flow heat exchanger to cool oil from 60°C to 30°C using water available at 20°C. The outlet temperature of the water is 26°C. The rate of flow of oil is 10 kg/s. The specific heat of the oil is 2200 J/kg K. The overall heat transfer coefficient U = 300 W/m2 K. Compare the area required for a counter flow exchanger. Parallel Flow 60'C AT, = 40 30'C AT, = 4 26'C 20'C Inlet Outlet Q= m, c, (T-T) = 10 x 2200 (60-30) J/s = 6,60,000 w Q =UA (LMTD) 40 - 4 LMTD 15.635°C 40 In 6,60,000 = 300 x A x 15.635 A= 140.71 m2 Counter Flow 60°C AT, = 34 26°C 30°C AT, = 10 20°C Inlet A Outiet Determine the area required in parallel flow heat exchanger to cool oil from 60°C to 30°C using water available at 20°C. The outlet temperature of the water is 26°C. The rate of flow of oil is 10 kg/s. The specific heat of the oil is 2200 J/kg K. The overall heat transfer coefficient U = 300 W/m2 K. Compare the area required for a counter flow exchanger. Parallel Flow 60'C AT, = 40 30'C AT, = 4 26'C 20'C Inlet Outlet Q= m, c, (T-T) = 10 x 2200 (60-30) J/s = 6,60,000 w Q =UA (LMTD) 40 - 4 LMTD 15.635°C 40 In 6,60,000 = 300 x A x 15.635 A= 140.71 m2 Counter Flow 60°C AT, = 34 26°C 30°C AT, = 10 20°C Inlet A Outiet

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