Design and Fabrication of a Heat Pipe using Refrigerant R-134a as Working Fluid

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2017 by IJETT Journal
Volume-49 Number-7
Year of Publication : 2017
Authors : Md. Zahidul Islam, Md. Al-Mamun, Bodius Salam
  10.14445/22315381/IJETT-V49P264

MLA 

Md. Zahidul Islam, Md. Al-Mamun, Bodius Salam "Design and Fabrication of a Heat Pipe using Refrigerant R-134a as Working Fluid", International Journal of Engineering Trends and Technology (IJETT), V49(7),415-418 July 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
Heat pipe is a simple device of very high thermal conductance with no moving parts that can transfer a large amount of heat by absorbing and releasing latent heat by a phase changing working fluid. As heat pipe is advantageous in heat transfer application over ordinary process, it is a topic of interest by the researcher and is improving every day. In this experimental work, a simple heat pipe was designed and fabricated using refrigerant R-22 as working fluid. Then the performance of the heat pipe was compared with natural cooling. The comparison was also made between free and forced convection applying a constant power input of 3.825 watt. For forced convection air velocity of 3.4 m/s and 4.1 m/s was used. It is found that with the aid of a heat pipe cooling rate can be decreased by 47%. This percentage can be decreased further by forced convection even with a constant power input. It is also found that the overall thermal resistance decreases with time.

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Keywords
Heat Pipe, Refrigerant R-134a, Heat transfer, Free convection, forced convection, Overall thermal resistance.