Share

Closed loop pulsating heat pipes. Part A: parametric experimental investigations.

Author(s) : CHAROENSAWAN P., KHANDEKAR S., GROLL M., et al.

Type of article: Article

Summary

Closed loop pulsating heat pipes (CLPHPs) are complex heat transfer devices having a strong thermo-hydrodynamic coupling governing the thermal performance. In this paper, a wide range of pulsating heat pipes is experimentally studied thereby providing vital information on the parameter dependency of their thermal performance. The influence characterization has been done for the variation of internal diameter, number of turns, working fluid and inclination angle (from vertical bottom heat mode to horizontal orientation mode) of the device. CLPHPs are heated by a constant-temperature water bath and cooled by a constant-temperature water-ethylene glycol mixture (50% each by volume). The working fluids employed are water, ethanol and R123. The results indicate a strong influence of gravity and number of turns on the performance. The thermophysical properties of working fluids affect the performance which also strongly depends on the boundary conditions of PHP operation. Part B of this paper, which deals with development of semi-empirical correlations to fit the data reported here coupled with some critical visualization results, will appear separately.

Details

  • Original title: Closed loop pulsating heat pipes. Part A: parametric experimental investigations.
  • Record ID : 2004-1626
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 23 - n. 16
  • Publication date: 2003/11

Links


See other articles in this issue (3)
See the source

Indexing