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The Effect of Type of Working Fluid on the Heat Transport Capacity of a Micro Heat Pipe

[+] Author Affiliations
Sugumar Dharmalingam

National Technical University College of Malaysia, Malacca, Malaysia

Kek Kiong Tio

Multimedia University, Malacca, Malaysia

Paper No. ICMM2005-75115, pp. 175-181; 7 pages
doi:10.1115/ICMM2005-75115
From:
  • ASME 3rd International Conference on Microchannels and Minichannels
  • ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d
  • Toronto, Ontario, Canada, June 13–15, 2005
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4185-5 | eISBN: 0-7918-3758-0
  • Copyright © 2005 by ASME

abstract

In order to elucidate the effects of working fluid’s properties on the heat transport capacity of a micro heat pipe, 3 commonly used fluids are selected for this study: water, ammonia and methanol. From the results obtained, it shows that for operating temperatures lower than 50°C, ammonia is preferred, but if the operating temperature exceeds 50°C, water is more suitable in transferring heat. Over the temperature range of 20°C∼100°C, the behavior of the heat transport capacity is found to be dominated by a property which is the ratio of the working fluid’s surface tension and liquid viscosity. This property which has the dimension of velocity has a controlling effect on the working fluid’s rate of circulation and therefore, the heat transport capacity.

Copyright © 2005 by ASME
Topics: Heat , Fluids , Heat pipes

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