Task (1) A. You were asked to design and manufacture a plate heat exchanger, as shown in the figure, to be used in transferring heat from hot water to cold water. Which material (copper, aluminium or polyethylene) will you choose to manufacture the inner plates of the heat exchanger to obtain the highest heat transfer? Give reason for your choice. B. Will the device be lighter in weight if it is made of copper, aluminium or polyethylene? Explain your answer. C. After you completed manufacturing the heat exchanger, you noticed that its outer surface is conductive to electricity, which may be dangerous during operation. what can you do to insulate it? D. Explain two types of degradation that could happen in the heat exchanger and discuss how to prevent them? E. Briefly explain one of the degradation types in polymers.

Task (1) A. You were asked to design and manufacture a plate heat exchanger, as shown in the figure, to be used in transferring heat from hot water to cold water. Which material (copper, aluminium or polyethylene) will you choose to manufacture the inner plates of the heat exchanger to obtain the highest heat transfer? Give reason for your choice. B. Will the device be lighter in weight if it is made of copper, aluminium or polyethylene? Explain your answer. C. After you completed manufacturing the heat exchanger, you noticed that its outer surface is conductive to electricity, which may be dangerous during operation. what can you do to insulate it? D. Explain two types of degradation that could happen in the heat exchanger and discuss how to prevent them? E. Briefly explain one of the degradation types in polymers.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.45P

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Similar questions

10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm 1D and 2.1-cm OD containing steam. The convection heat transfer coefficients on the air and steam sides of the tubes are , respectively. Calculate the overall heal transfer coefficient for the heal exchanger (a) based on the inner tube area and (b) based on the outer tube area.
Steam is produced in the copper tubes (k =223 Btu/h · ft · °F) of a heat exchanger at a temperature of 250°F by another fluid condensing on the outside surfaces of the tubes at 350°F. The inner and outer diameters of the tube are 1 in. and 1.3 in., respectively. When the heat exchanger was new, the rate of heat transfer per foot length of the tube was 2x104 Btu/h.(a) Determine the rate of heat transfer per foot length of the tube when a 0.01-in.-thick a layer of limestone (k =1.7 Btu/h·ft·°F) has formed on the inner surface of the tube after extended use.(b) Assuming that a 0.01-in.-thick limestone layer has formed on both the inner and outer surfaces of the tube
Steam is produced in the copper tubes (k =223 Btu/h · ft · °F) of a heat exchanger at a temperature of 250°F by another fluid condensing on the outside surfaces of the tubes at 350°F. The inner and outer diameters of the tube are 1 in. and 1.3 in., respectively. When the heat exchanger was new, the rate of heat transfer per foot length of the tube was 2x104 Btu/h. (a) Determine the rate of heat transfer per foot length of the tube when a 0.01-in.-thick layer of limestone (k =1.7 Btu/h·ft·°F) has formed on the inner surface of the tube after extended use. (b) Assuming that a 0.01-in.-thick limestone layer has formed on both the inner and outer surfaces of the tube. Answer: 1.45x104 Btu/h; 1.20x104 Btu/h
2. In a counterflow double-pipe heat exchanger, the hot fluid enters at 149°C and exits at 76°C. The cold fluid enters at 33°C and exits at 87°C. What is the heat exchanger effectiveness? Express your answer as a decimal value.
Define the following:a) Heat Exchanger.b) What is the difference between a condenser and heat exchanger?c) Why every condenser is not a heat exchanger?d) What are mixed and unmixed flow heat exchangers? Explain with the help of an example.