A shell and tube heat exchanger, with two tube passes and one shell pass, is used to cool the lubricant of an engine in a thermal power plant. The cold fluid is water driven from a river that enters...

A shell and tube heat exchanger, with two tube passes and one shell pass, is used to cool the lubricant of an engine in a thermal power plant. The cold fluid is water driven from a river that enters the tubes at 24ºC. The lubricant enters the shell with a temperature of 115ºC. We assume that the overall heat transfer coefficient "U" is 450 W/m2 ºC. If the lubricant is the minimum fluid, the effectiveness of this exchanger is ε=0.65, the NTU = 1.5, and the heat transfer area A = 8 m2, determine the oil mass flowrate Cpwater = 4178J/kg.°C, Cpoil = 2131 J/kg.°C Select one: a. 1.226 kg/s b. 1.426 kg/s c. 1.326 kg/s d. 1.126 kg/s


Extracted text: A shell and tube heat exchanger, with two tube passes and one shell pass, is used to cool the lubricant of an engine in a thermal power plant. The cold fluid is water driven from a river that enters the tubes at 24°C. The lubricant enters the shell with a temperature of 115°C. We assume that the overall heat transfer coefficient "U" is 450 W/m2 °C. If the lubricant is the minimum fluid, the effectiveness of this exchanger is ɛ=0.65, the NTU = 1.5, and the heat transfer area A = 8 m2, determine the oil mass flowrate Cpwater = 4178J/kg.°C, Cpoil = 2131 J/kg.°C Select one: a. 1.226 kg/s b. 1.426 kg/s c. 1.326 kg/s d. 1.126 kg/s