Question: Please ans B Problem 1(15 points): Hot water is used to heat air in a double-pipe heat exchanger. The heat transfer coefficients on the water

Please ans B

Problem 1(15 points): Hot water is used to heat air in a double-pipe heat exchanger. The heat transfer coefficients on the water side and on the air side are 100 Btu/hr.ft?.F and 20 Btu/hr.ft.OF respectively. The heat exchanger pipe is 2-inch, schedule 40 steel (k= 54 W/m K) with water inside. a) Calculate the overall heat transfer coefficient based on the outer diameter. Express you answer in Btu/hr.ft2.F and W/m2 C. Show work. b) Assume that a fouling factor of 1,000 Btu/hr.ft2.F based on the tube outside diameter has developed over time, calculate the overall heat transfer coefficient based on the outer diameter. Express you answer in Btu/hr.ft2.F and W/m2C

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