Experimental study on thermal performance of loop heat pipes with flat evaporator for LSI package
Thermal performance of a loop heat pipe (LHP) equipped with a flat evaporator and a compensation chamber integrated onto the evaporator and separated from the evaporator was experimentally investigated. The heat leak in the flat evaporator is a critical problem as it results in the degradation of the heat transport characteristics of the LHP. In this paper, the heat leak quantity during the steady-state operation of the LHP was calculated by carrying out a thermal energy balance analysis for the flat evaporator. From the results, the heat conduction along the case sidewall of the evaporator dominated the heat leak on the evaporator, and it was found that the heat leak from the heat source to the compensation chamber decreased to 5% or less of the applied input power due to the reduced heat conduction of the evaporator casing.
Mathematical modeling of loop heat pipes and experimental validation
A mathematical model to calculate the steady-state performance of a loop heat pipe (LHP) is presented. The mathematical model is based on the steady-state energy conservation equations and the pressure drop calculations along the fluid path in the LHP. The LHP operating temperature is calculated as a function of the applied power at a given LHP condition. The beat exchange between each component of the LHP and the surroundings is taken into account. Both convection and radiation environments are modeled. Experimental validation of the model is attempted by using two different LHP designs. The validity of the mathematical model is investigated for different sink temperatures and elevations. The comparison of the calculations and experimental results showed good agreement (within 5% ). The proposed method proved to be a useful tool for reliable prediction of the steady-state performance characteristics of the LHP.
Japanese women marriage migrants today : negotiating gender, identity and community in search of a new lifestyle in Western Sydney
...................................................................................................................... vi CHAPTER 1. LIFESTYLE MIGRANT, CONSEQUENT SETTLER AND MARRIAGE MIGRANT ............................................................................................. 7 1.