Research Article Open Access

Effect of Inner Diameter and Inclination Angles on Operation Limit of Closed-Loop Oscillating Heat-Pipes with Check Valves

P. Meena1, S. Rittidech1 and P. Tammasaeng1
  • 1 ,
American Journal of Engineering and Applied Sciences
Volume 1 No. 2, 2008, 100-103

DOI: https://doi.org/10.3844/ajeassp.2008.100.103

Submitted On: 12 July 2008 Published On: 30 June 2008

How to Cite: Meena, P., Rittidech, S. & Tammasaeng, P. (2008). Effect of Inner Diameter and Inclination Angles on Operation Limit of Closed-Loop Oscillating Heat-Pipes with Check Valves . American Journal of Engineering and Applied Sciences, 1(2), 100-103. https://doi.org/10.3844/ajeassp.2008.100.103

Abstract

This research was to study the effect of inner diameter and inclination angles on operation limit of a closed loop oscillating heat pipes with check valves (CLOHP/CV). A set of CLOHP/CV was made of copper tubes in combination of following dimension: 1.77 and 2.03 mm inside diameter: 10 turn, with R123 was used as the working fluid. The working fluid was filled in the tube at the filling ratio of 50%. The inclination angles were 0, 20, 40, 60, 80 and 90° with 5 equal lengths for evaporator, adiabatic and condenser sections. The evaporator section was given heat by heater while the condenser section was cooled by volume water in a cold bath. The adiabatic section was properly insulated. In the test operation, it could be concluded as follows. It indicated that when the inner diameter changed from 1.77-2.03 mm the critical temperature increased. And when increase the inclination angles from 0 until to 90° the critical temperature increased.

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Keywords

  • Closed-looped oscillating heat-pipe
  • check valves
  • inner diameter
  • inclination angles
  • operation limit
  • critical state
  • copper tubes