Small Loop Heat Pipe with Plastic Wick for Electronics Cooling

2011 ◽  
Vol 50 (11S) ◽  
pp. 11RF02 ◽  
Author(s):  
Hosei Nagano ◽  
Masahito Nishigawara
Keyword(s):  
Heat Pipe ◽  
Electronics Cooling ◽  
Loop Heat Pipe ◽  
Small Loop

Small Loop Heat Pipe with Plastic Wick for Electronics Cooling

2011 ◽  
Vol 50 (11) ◽  
pp. 11RF02 ◽  
Author(s):  
Hosei Nagano ◽  
Masahito Nishigawara
Keyword(s):  
Heat Pipe ◽  
Electronics Cooling ◽  
Loop Heat Pipe ◽  
Small Loop

Effect of Nanoparticle Coating on the Performance of a Miniature Loop Heat Pipe for Electronics Cooling Applications

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
Trijo Tharayil ◽  
Lazarus Godson Asirvatham ◽  
S. Rajesh ◽  
Somchai Wongwises
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
Physical Vapor Deposition ◽  
Low Voltage ◽  
Circuit Breaker ◽  
Electronics Cooling ◽  
Working Fluid ◽  
Loop Heat Pipe ◽  
Transfer Coefficients ◽  
Nanoparticle Coating

The effect of nanoparticle coating on the performance of a miniature loop heat pipe (mLHP) is experimentally investigated for heat inputs of 20–380 W using distilled water as the working fluid. Applications include the cooling of electronic devices such as circuit breaker in low voltage switch board and insulated gate bipolar transistor. Physical vapor deposition method is used to coat the nanoparticles on the evaporator surface for different coating thicknesses of 100 nm, 200 nm, 300 nm, 400 nm, and 500 nm, respectively. An optimum filling ratio (FR) of 30% is chosen for the analysis. Experimental findings show that the nanoparticle coating gives a remarkable improvement in heat transfer of the heat pipe. An average reduction of 6.7%, 11.9%, 17.2%, and 22.6% in thermal resistance is observed with coating thicknesses of 100 nm, 200 nm, 300 nm, and 400 nm, respectively. Similarly, enhancements in evaporator heat transfer coefficients of 47%, 63.5%, 73.5%, and 86% are noted for the same coating thicknesses, respectively. Evaporator wall temperature decreased by 15.4 °C for 380 W with a coating thickness of 400 nm. The repeatability test ensures the repeatability of experiments and the stability of coatings in the long run.

Experimental Study on Heat Transfer Capability of a Miniature Loop Heat Pipe

2016 ◽  
Author(s):  
Guohui Zhou ◽  
Ji Li ◽  
Lucang Lv
Keyword(s):  
Heat Pipe ◽  
Heat Load ◽  
Electronics Cooling ◽  
High Heat ◽  
Working Fluid ◽  
Loop Heat Pipe ◽  
Evaporator Temperature ◽  
Liquid Line ◽  
Horizontal Orientation ◽  
Flat Evaporator

In this paper, a miniature loop heat pipe (mLHP) with a flat evaporator is illustrated and investigated experimentally, with water as the working fluid. The mLHP can be applied for the mobile electronics cooling, such as tablet computers and laptop computers, with a 1.2 mm thick ultra-thin flat evaporator and a thickness of 1.0 mm for the vapor line, liquid line and condenser. A narrow sintered copper mesh in the liquid line and a part of the condenser as the secondary wick can promote the flow of the condensed working fluid back to the evaporator. The experimental results showed that the mLHP could start up successfully and operate stably at low heat load of 3 W in the horizontal orientation, and transport a high heat load of 12 W (the heat flux of 4 W/cm2) with the evaporator temperature below 100 °C in different test orientations by natural convection, showing good operational performance against gravity field. The minimum mLHP thermal resistance of 0.32 K/W was achieved at the input heat load of 12 W in the horizontal orientation.

Thermal Performance Evaluation of a Small Loop Heat Pipe for Space Applications

2003 ◽  
Author(s):  
Michael T. Pauken ◽  
Gaj Birur ◽  
Michael Nikitkin ◽  
Faisal Al-Khabbaz
Keyword(s):  
Performance Evaluation ◽  
Heat Pipe ◽  
Thermal Performance ◽  
Loop Heat Pipe ◽  
Space Applications ◽  
Small Loop

Development of an Experimental Small Loop Heat Pipe with Polytetrafluoroethylene Wicks

2011 ◽  
Vol 25 (4) ◽  
pp. 547-552 ◽  
Author(s):  
Hosei Nagano ◽  
Fuyuko Fukuyoshi ◽  
Hiroyuki Ogawa ◽  
Hiroki Nagai
Keyword(s):  
Heat Pipe ◽  
Loop Heat Pipe ◽  
Small Loop

scholarly journals Study on Thermal Performances of a Small Loop Heat Pipe

2008 ◽  
Vol 3 (2) ◽  
pp. 355-367 ◽  
Author(s):  
Hosei NAGANO ◽  
Hiroki NAGAI ◽  
Fuyuko FUKUYOSHI ◽  
Hiroyuki OGAWA
Keyword(s):  
Heat Pipe ◽  
Loop Heat Pipe ◽  
Small Loop
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