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
DOI :  10.14445/22315381/IJETT-V49P264

Citation 

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.

Reference
[1] Chaudhry, H. N., Hughes, B. R., & Ghani, S. A. (2012). A review of heat pipe systems for heat recovery and renewable energy applications. Renewable and Sustainable Energy Reviews, 16(4), 2249-2259.
[2] Faghri, A. (2012). Review and advances in heat pipe science and technology. Journal of heat transfer, 134(12), 123001.
[3] Yau, Y. H., & Ahmadzadehtalatapeh, M. (2010). A review on the application of horizontal heat pipe heat exchangers in air conditioning systems in the tropics. Applied Thermal Engineering, 30(2), 77-84.
[4] Reay, D., McGlen, R., & Kew, P. (2013). Heat pipes: theory, design and applications. Butterworth-Heinemann.
[5] R.S. Gaugler, US Patent 2350348. Applied 21 December 1942, Published 6 June 1944
[6] G.M. Grover, US Patent 3229759. Filed 1963.
[7] G.M. Grover, T.P. Cotter, G.F. Erickson, Structures of very high thermal conductance, J. App. Phys. 35 (1964) 1990.
[8] Development of a simplified heat pipe numerical model and case study/experimental validation using a long ‘wicked’heat pipe. International journal of energy research, 28(14), 1293-1311.
[9] Zhang, X. M. (2004). Experimental study of a pulsating heat pipe using FC-72, ethanol, and water as working fluids. Experimental Heat Transfer, 17(1), 47-67.
[10] Kobayashi, T., Ogushi, T., Haga, S., Ozaki, E., & Fujii, M. (2003). Heat transfer performance of a flexible looped heat pipe using R134a as a working fluid: proposal for a method to predict the maximum heat transfer rate of FLHP. Heat Transfer—Asian Research, 32(4), 306-318.
[11] Wang, E. H., Zhang, H. G., Fan, B. Y., Ouyang, M. G., Zhao, Y., & Mu, Q. H. (2011). Study of working fluid selection of organic Rankine cycle (ORC) for engine waste heat recovery. Energy, 36(5), 3406-3418.
[12] Shafahi, M., Bianco, V., Vafai, K., & Manca, O. (2010). An investigation of the thermal performance of cylindrical heat pipes using nanofluids. International journal of heat and mass transfer, 53(1), 376-383.
[13] [Wannapakhe, S., Rittidech, S., Bubphachot, B., & Watanabe, O. (2009). Heat transfer rate of a closed-loop oscillating heat pipe with check valves using silver nanofluid as working fluid. Journal of Mechanical Science and Technology, 23(6), 1576-1582.
[14] Qu, J., Wu, H. Y., & Cheng, P. (2010). Thermal performance of an oscillating heat pipe with Al 2 O 3–water nanofluids. International Communications in Heat and Mass Transfer, 37(2), 111-115.
[15] Yan, Y. Y., Lio, H. C., & Lin, T. F. (1999). Condensation heat transfer and pressure drop of refrigerant R-134a in a plate heat exchanger. International Journal of Heat and Mass Transfer, 42(6), 993-1006

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