A Parametric Study of Performance Characteristics of Loop Heat Pipes

1999 ◽  
Author(s):  
Tarik Kaya ◽  
Jentung Ku
Keyword(s):  
Parametric Study ◽  
Heat Pipes ◽  
Performance Characteristics ◽  
Loop Heat Pipes

Modeling and Analysis of Supercritical Startup of a Cryogenic Loop Heat Pipe

2011 ◽  
Vol 133 (12) ◽  
Author(s):  
Lizhan Bai ◽  
Guiping Lin ◽  
G. P. Peterson ◽  
Dongsheng Wen
Keyword(s):  
Mathematical Model ◽  
Parametric Study ◽  
Heat Load ◽  
Heat Pipes ◽  
Working Fluid ◽  
Loop Heat Pipe ◽  
Modeling And Analysis ◽  
Loop Heat Pipes ◽  
Network Method ◽  
Startup Performance

Supercritical startup of cryogenic loop heat pipes (CLHPs) has been investigated both analytically and experimentally. Mathematical model of the supercritical startup has been established using the nodal network method, and parametric study is conducted where the effects of working fluid charged pressure, parasitic heat load from the ambient, etc., on the supercritical startup characteristics are incorporated and evaluated. The result improves understanding of the effects of these parameters on supercritical startup and identification of those conditions under which supercritical startup can and will occur. In addition, the modeling effort has led to an enhanced understanding of supercritical startup performance.

scholarly journals Experimental Study on Thermal Performance of a Loop Heat Pipe with Different Working Wick Materials

Energies ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2453
Author(s):  
Kyaw Zin Htoo ◽  
Phuoc Hien Huynh ◽  
Keishi Kariya ◽  
Akio Miyara
Keyword(s):  
Stainless Steel ◽  
Heat Pipes ◽  
Working Fluid ◽  
Stable Operation ◽  
Loop Heat Pipe ◽  
Heater Surface ◽  
Loop Heat Pipes ◽  
Limited Temperature ◽  
Sintered Stainless Steel ◽  
Continuous Heat

In loop heat pipes (LHPs), wick materials and their structures are important in achieving continuous heat transfer with a favorable distribution of the working fluid. This article introduces the characteristics of loop heat pipes with different wicks: (i) sintered stainless steel and (ii) ceramic. The evaporator has a flat-rectangular assembly under gravity-assisted conditions. Water was used as a working fluid, and the performance of the LHP was analyzed in terms of temperatures at different locations of the LHP and thermal resistance. As to the results, a stable operation can be maintained in the range of 50 to 520 W for the LHP with the stainless-steel wick, matching the desired limited temperature for electronics of 85 °C at the heater surface at 350 W (129.6 kW·m−2). Results using the ceramic wick showed that a heater surface temperature of below 85 °C could be obtained when operating at 54 W (20 kW·m−2).

Thermal Control with Low Power, Miniature Loop Heat Pipes

1999 ◽  
Author(s):  
Walter B. Bienert ◽  
William J. Krotiuk ◽  
Michael N. Nikitkin
Keyword(s):  
Low Power ◽  
Heat Pipes ◽  
Thermal Control ◽  
Loop Heat Pipes
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