H223 Numerical Analysis of Liquid-Vapor Thermo-Fluid Behavior in a Loop Heat Pipe Evaporator with Pore Network Model : Modeling in a low heat-load mode

2013 ◽  
Vol 2013 (0) ◽  
pp. 423-424
Author(s):  
Masahito Nishikwara ◽  
Hosei Nagano ◽  
Marc Prat
Keyword(s):  
Numerical Analysis ◽  
Heat Pipe ◽  
Network Model ◽  
Heat Load ◽  
Pore Network ◽  
Pore Network Model ◽  
Loop Heat Pipe ◽  
Fluid Behavior ◽  
Load Mode ◽  
Liquid Vapor

Effect of Sintering Temperature and Time in Nickel Wick for Loop Heat Pipe with Flat Evaporator

2014 ◽  
Vol 602-605 ◽  
pp. 528-532
Author(s):  
Shen Chun Wu ◽  
Chang Yu Wu ◽  
Weie Jhih Lin ◽  
Jia Ruei Chen ◽  
Yau Ming Chen
Keyword(s):  
Heat Pipe ◽  
Constant Temperature ◽  
Heat Load ◽  
Sintering Temperature ◽  
Performance Testing ◽  
Effective Porosity ◽  
Temperature Curve ◽  
Loop Heat Pipe ◽  
Maximum Heat ◽  
Load Increase

This paper specifically addresses the effect of changing the constant temperature region of the sintering temperature curve in manufacturing nickel powder capillary structure (wick) on the performance of a flat loop heat pipe (FLHP). The sintering temperature curve is composed of three regions: a region of increasing temperature, a region of constant temperature, and a region of decreasing temperature, with the sintering time and temperature in the region of constant temperature having significant effect on the permeability of the wick. In this study, for wick manufacturing the temperatures in this region tested range from 550°C to 650°C and the time from 30 minutes to 60 minutes. The properties and internal parameters of the wick are measured, and the wick is placed into FLHP for performance testing. Experimental results show that at sintering temperature of 550°C and lasting about 45 minutes, maximum heat load is 200W, minimum thermal resistance is 0.32°C/W, permeability is , porosity is 66%, effective porosity is 3.8and heat flux is around 21W/cm2; related literatures have only reported maximum heat load increase of 25%.

Sign in / Sign up

Export Citation Format

Share Document