Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Water enters at 20 ℃ at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be heated by hot air that enters the heat exchanger at 90 ℃ at a rate of 0.3 kg/s. The overall heat transfer coefficient based on the inner side of the tube to be 100 W/m2. ℃. The length of the tube is 14 m and the internal diameter of the tube is 1.4 cm. Determine the outlet temperature of the water. The specific heats of the water and air are given to be 4.18 and 1.01 kJ/kg.℃, respectively. Select one: a. 32.7 ℃ b. 30.5 ℃ c. 24.3 ℃ d. 28.8 ℃
Water enters at 20 °C at a rate of 0.1 kg/s
in a double-pipe counter flow heat
exchanger is to be heated by hot air that
enters the heat exchanger at 90 °C at a
rate of 0.3 kg/s. The overall heat transfer
coefficient based on the inner side of the
tube to be 100 W/m2. °C. The length of
the tube is 14 m and the internal
diameter of the tube is 1.4 cm.
Determine the outlet temperature of the
water. The specific heats of the water
and air are given to be 4.18 and 1.01 kJ/
kg.°C, respectively.
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Transcribed Image Text:Water enters at 20 °C at a rate of 0.1 kg/s in a double-pipe counter flow heat exchanger is to be heated by hot air that enters the heat exchanger at 90 °C at a rate of 0.3 kg/s. The overall heat transfer coefficient based on the inner side of the tube to be 100 W/m2. °C. The length of the tube is 14 m and the internal diameter of the tube is 1.4 cm. Determine the outlet temperature of the water. The specific heats of the water and air are given to be 4.18 and 1.01 kJ/ kg.°C, respectively.
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