Research Article Open Access

Effect of Evaporator Section Lengths and Working Fluids on Operational Limit of Closed Loop Oscillating Heat Pipes with Check Valves (CLOHP/CV)

P. Meena, S. Rittidech and P. Tammasaeng

Abstract

This research aims to the effect of evaporator section lengths and working fluids on operational limit of closed loop oscillating heat pipes with check valves (CLOHP/CV) with R123 Ethanol and Water were used as the working fluids. A set of CLOHP/CV was made of copper tubes in combination of following dimension: 1.77 mm inside diameter: 10 turns: 5, 10 and 15 cm equal lengths for evaporator, adiabatic and condenser sections. The working fluid was filled in the tube at the filling ratio of 50%. 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. Which the temperature at the adiabatic section was controlled at 60°C in steady-state condition. From The obtained results obtained, it could be concluded as follows. When the evaporator lengths increased from 5 cm to 10 and 15 cm the critical heat transfer flux decreased. There was working fluids change from R123 to Ethanol and water the critical heat flux decreased.

American Journal of Applied Sciences
Volume 6 No. 1, 2009, 133-136

DOI: https://doi.org/10.3844/ajassp.2009.133.136

Submitted On: 22 May 2008 Published On: 31 January 2009

How to Cite: Meena, P., Rittidech, S. & Tammasaeng, P. (2009). Effect of Evaporator Section Lengths and Working Fluids on Operational Limit of Closed Loop Oscillating Heat Pipes with Check Valves (CLOHP/CV). American Journal of Applied Sciences, 6(1), 133-136. https://doi.org/10.3844/ajassp.2009.133.136

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Keywords

  • Closed-looped oscillating heat-pipe
  • check valves
  • operational limit
  • critical heat flux