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Determine the number of fins and overall fin efficiency using Figure 2.7. (c) Determine the total heat transfer through the heat pipe.

Determine the number of fins and overall fin efficiency using Figure 2.7. (c) Determine the total heat transfer through the heat pipe.

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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3. A horizontal aluminium radial fin copper heat pipe is constructed from a 90cm-long pipe to recover heat in a heat pipe heat exchanger, as shown in the figure. The water is the working fluid in the heat pipe. The inner and outer diameters of the heat pipe are 9 mm and 50 mm (ri =5 mm), respectively. The diameter of the vapor space is 7 mm. The aluminium (kat = 205 W/mK) fin thickness and outer fin diameter are 0.1 mm and 40 mm %3! (r2= 20 mm) and the fin spacing is 2 mm. The evaporator, adiabatic region and condenser of the heat pipe are 20 cm cach and the wicking structure consists of two layers of #200- mesh copper screen with the wire diameter of 0.0012 in of the heat pipe. The copper has the thermal conductivity of 401 W/mK. The evaporator of the heat pipe is immerged in a stream of airflow at 40°C with the heat transfer coefficient of 27 W/m'K. The condenser is immerged in a stream of airflow at 23°C with the heat transfer coefficient of 27 W/m'K, respectively. (a) The total thermal resistance of the internal heat pipe. (b) Detemine the number of fins and overall fin efficiency using Figure 2.7. (c) Determine the total heat transfer through the heat pipe. d, Th. Ta/ Th. d,
Transcribed Image Text:3. A horizontal aluminium radial fin copper heat pipe is constructed from a 90cm-long pipe to recover heat in a heat pipe heat exchanger, as shown in the figure. The water is the working fluid in the heat pipe. The inner and outer diameters of the heat pipe are 9 mm and 50 mm (ri =5 mm), respectively. The diameter of the vapor space is 7 mm. The aluminium (kat = 205 W/mK) fin thickness and outer fin diameter are 0.1 mm and 40 mm %3! (r2= 20 mm) and the fin spacing is 2 mm. The evaporator, adiabatic region and condenser of the heat pipe are 20 cm cach and the wicking structure consists of two layers of #200- mesh copper screen with the wire diameter of 0.0012 in of the heat pipe. The copper has the thermal conductivity of 401 W/mK. The evaporator of the heat pipe is immerged in a stream of airflow at 40°C with the heat transfer coefficient of 27 W/m'K. The condenser is immerged in a stream of airflow at 23°C with the heat transfer coefficient of 27 W/m'K, respectively. (a) The total thermal resistance of the internal heat pipe. (b) Detemine the number of fins and overall fin efficiency using Figure 2.7. (c) Determine the total heat transfer through the heat pipe. d, Th. Ta/ Th. d,
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