Experimental study on start-up characteristics of loop heat pipes

2005 ◽  
Vol 48 (2) ◽  
pp. 131 ◽  
Author(s):  
Hongxing ZHANG
Keyword(s):  
Experimental Study ◽  
Heat Pipes ◽  
Loop Heat Pipes ◽  
Start Up

Noncondensible Gas, Mass, and Adverse Tilt Effects on the Start-up of Loop Heat Pipes

1999 ◽  
Author(s):  
Jane Baumann ◽  
Brent Cullimore ◽  
Boris Yendler ◽  
Eva Buchan
Keyword(s):  
Heat Pipes ◽  
Loop Heat Pipes ◽  
Start Up

scholarly journals Recent Advances in Loop Heat Pipes with Flat Evaporator

Entropy ◽  
2021 ◽  
Vol 23 (11) ◽  
pp. 1374
Author(s):  
Pawel Szymanski
Keyword(s):  
Reverse Flow ◽  
Construction Materials ◽  
Poor Performance ◽  
Heat Pipes ◽  
Manufacturing Cost ◽  
Heating Zone ◽  
Loop Heat Pipes ◽  
Start Up ◽  
Flat Evaporator ◽  
Compensation Chamber

The focus of this review is to present the current advances in Loop Heat Pipes (LHP) with flat evaporators, which address the current challenges to the wide implementation of the technology. A recent advance in LHP is the design of flat-shaped evaporators, which is better suited to the geometry of discretely mounted electronics components (microprocessors) and therefore negate the need for an additional transfer surface (saddle) between component and evaporator. However, various challenges exist in the implementation of flat-evaporator, including (1) deformation of the evaporator due to high internal pressure and uneven stress distribution in the non-circular casing; (2) heat leak from evaporator heating zone and sidewall into the compensation chamber; (3) poor performance at start-up; (4) reverse flow through the wick; or (5) difficulties in sealing, and hence frequent leakage. This paper presents and reviews state-of-the-art LHP technologies; this includes an (a) review of novel manufacturing methods; (b) LHP evaporator designs; (c) working fluids; and (d) construction materials. The work presents solutions that are used to develop or improve the LHP construction, overall thermal performance, heat transfer distance, start-up time (especially at low heat loads), manufacturing cost, weight, possibilities of miniaturization and how they affect the solution on the above-presented problems and challenges in flat shape LHP development to take advantage in the passive cooling systems for electronic devices in multiple applications.

Experimental study of loop heat pipes with different working fluids in 190–260 K

2020 ◽  
Vol 178 ◽  
pp. 115530
Author(s):  
Cheng Liu ◽  
Rongjian Xie ◽  
Nanxi Li ◽  
Depu Lu ◽  
Fangjun Hong ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pipes ◽  
Working Fluids ◽  
Loop Heat Pipes

scholarly journals Experimental study on the supercritical startup of cryogenic loop heat pipes with redundancy design

2016 ◽  
Vol 118 ◽  
pp. 353-363 ◽  
Author(s):  
Yuandong Guo ◽  
Guiping Lin ◽  
Lizhan Bai ◽  
Xueqin Bu ◽  
Hongxing Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Heat Pipes ◽  
Loop Heat Pipes ◽  
Redundancy Design
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