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Research of Heat Transfer in Liquid Droplet Radiation Refrigerator for Space Station

Author: LiChao
Tutor: DongShiKui
School: Harbin Institute of Technology
Course: Engineering Thermophysics
Keywords: space heat rejection droplet radiation refrigeration coupled radiation heat transfer with phase-change unit mass heat release capacity
CLC: TK124
Type: Master's thesis
Year: 2008
Downloads: 43
Quote: 0
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Abstract


The droplet radiation refrigeration system has the following characteristics:the surface of the droplet does not have the solid outer covering and exposes directly to the space,the radiating surface area is big, the quality of entire refrigeration system reduces greatly, the surface of the droplet layer does not have the danger which pierced by the spatial fragment and punctured by the directional energy weapon, the system and the medium may load in the small container just like tub-like structure, the system can easily launch and assemble, the system and the medium can work in a very long time. Therefore, in the space station refrigeration system alternative plans, the droplet radiation refrigerator is considered that is the best choice. This article prime task is the heat transfer process analysis of the spatial droplet radiation refrigerator and the performance optimization design. The actual content is as follows:(1) Modeling of single droplet heat transfer process. In this section, under the cooling condition of radiation and convection the heat transfer mathematics and physical model of the single droplet with phase-change were built up, the enthalpy-type-source method was used to resolve the process of phase-change, and the influencing factors of single droplet heat transfer process were analyzed.(2) Analyzing and modeling of droplet radiation refrigerator heat transfer process. In this section, the mathematics and physical model of droplet radiation and phase-changes in the rectangular space were built up, the Monte Carlo Method was used to resolve radiation heat transfer source item, and the influencing factors of heat transfer process of droplet radiation refrigerator were analyzed.(3) Optimizing of thermal properties of the droplet radiation refrigerator. In this section, the best portal frame construction, the best operating temperature and unit mass heat release of droplet radiation refrigerator were compared and analyzed.

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CLC: > Industrial Technology > Energy and Power Engineering > Thermal engineering, heat > Thermal Engineering Theory > Heat Transfer
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