Steady Sate Modeling of LHP and Analysis

Abstract:

An ammonia-stainless steel steady state modeling of loop heat pipe was established, the impacts on the LHP operating temperature induced by alterable heat loads under 3 operating cases (the different position between evaporator and condenser, the changing of ambient temperature and the changing of heat sink temperature) were analyzed and conclusions were made. Changing the position between evaporator and condenser has a significant influence on the LHP operating temperature. Anti-gravity operation will reduce the performance of the LHP, this phenomenon is obviously in low heat load range. Further more, increasing of fluid pressure drop in the loop will induce decreasing of the LHP performance. The temperature difference between ambient and heat sink will influence the transition heat load (from variable conductance mode to fixed conductance mode), the bigger the temperature difference the higher the transition heat load.

• Periodical: Advanced Materials Research (Volumes 430-432)
• Pages: 1834-1838
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.430-432.1834
• Online since: January 2012
• Authors: Yan Chen, Wei Chang, Shu Sheng Zhang, Chun Sheng Guo
• Keywords: LHP, Numerical Simulation, Steady State Modeling

References

[1] Yu.F. Gerasimov, Yu.E. Dolgirev, Yu.F. Maydanik, et al., Determination of the vapor temperature in loop heat pipes with separate channels, Izvestiya vuzov 'Energetika, 6 (1978) 123–127, in Russian.

[2] H.X., Zhang , T., Ding, et al, Experimental investigation on start-up of loop heat pipe, Science in CHINA, Ser. E, Engineering & Materials Science, 35 (1), 2005, pp.17-30.

[3] Kiseev, B.M., and Pogorelov, N.P., A study of loop heat pipe thermal resistance. 10th international heat pipe conference, September (1997).

[4] Yu.F. Maidanik, Yu.G. Fershtater, N.N. Solodovnik, Design and investigation of loop heat pipes for terrestrial and space application, SAE paper 941407, (1994).

DOI: 10.4271/941407

[5] A. Pal, Y.K. Joshi, M.H. Beitelmal, C.D. Patel, T.M. Wenger, Design and performance Evaluation of a compact thermosyphon, IEEE Transactions on Components and Packaging Technologies 25 (4) (2002) 601e606.

DOI: 10.1109/tcapt.2002.807997

[6] V.V. Vlassov, R.R. Riehl, Mathematical model of a loop heat pipe with cylindrical evaporator and integrated reservoir, Applied Thermal Engineering 28 (2008) 942e954.

DOI: 10.1016/j.applthermaleng.2007.07.016

[7] L. Bai, G. Lin, D. Wenb, J. Feng, Experimental investigation of startup behaviors of a dual compensation chamber loop heat pipe with insufficient fluid inventory, Applied Thermal Engineering 29 (2009) 1447e1456.

DOI: 10.1016/j.applthermaleng.2008.06.019