Saturated refrigerant 134a flows in the evaporator tube at 2 °C. The evaporator is made of thin copper tube with d=1 cm outer diameter. Aluminum annular fins having a diameter of D=2.5 cm are attached to the surface of the pipe. The ambient is at 25°C and the heat transfer coefficient is h-40. a. Determine the heat loss per unit length of the evaporator tube, if fins are 0.5 mm thick and the fin density is 200 fins per meter.

Saturated refrigerant 134a flows in the evaporator tube at 2 °C. The evaporator is made of thin copper tube with d=1 cm outer diameter. Aluminum annular fins having a diameter of D=2.5 cm are attached to the surface of the pipe. The ambient is at 25°C and the heat transfer coefficient is h-40. a. Determine the heat loss per unit length of the evaporator tube, if fins are 0.5 mm thick and the fin density is 200 fins per meter.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter40: Typical Operating Conditions

Section: Chapter Questions

Problem 9RQ: The evaporator design temperature may in some cases operate at a slightly ____(higher or lower)...

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