Which of the following will cause the heat transfer rate to decrease?
A. The surface area decreases.
B. The heat transfer coefficient increases.
C. The temperature difference between the fluids increases.
D. All of the above
A. Correct. The heat transfer rate will decrease if the surface area decreases.
B. Incorrect. The heat transfer rate will decrease if the heat transfer coefficient decreases.
C. Incorrect. The heat transfer rate will decrease if the difference between the fluids decreases.
D. Incorrect. The heat transfer rate will decrease if the surface area decreases, the heat transfer coefficient decreases, or the difference between the fluids decreases.
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