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星载荷热控制辐冷板激光致热计算分析
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作者 唐进迎 雷武虎 +2 位作者 任晓东 张坤 张明鑫 《红外与激光工程》 EI CSCD 北大核心 2018年第12期303-310,共8页
卫星的温度变化直接影响着电子器件的工作性能,为了研究辐冷板的温升效应对电子器件温度的影响,通过分析辐冷板的散热机理和辐冷板工作特性,采用有限元分析软件,对简化后的辐冷板模型进行了激光辐照热效应计算分析。以脉冲激光作为辐射... 卫星的温度变化直接影响着电子器件的工作性能,为了研究辐冷板的温升效应对电子器件温度的影响,通过分析辐冷板的散热机理和辐冷板工作特性,采用有限元分析软件,对简化后的辐冷板模型进行了激光辐照热效应计算分析。以脉冲激光作为辐射源,对辐冷板进行照射,通过对其表面温度场进行数值模拟,得到了在脉冲激光照射下的瞬态温度场分布,并对模拟结果进行了分析和研究。发现电子器件在没有散热的情况下温度将升高64.5 K,在最大工作状态时激光的照射将严重影响热管的工作性能,而且热管的非正常工作将使电子器件温度升高,影响电子器件正常运行,为星上温度影响电子器件性能实验奠定了理论基础。 展开更多
关键词 辐冷板 脉冲激光 有限元 温度场
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Cooling performance analysis of radiant panel at different positions 被引量:2
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作者 高志宏 刘晓华 江亿 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期364-367,共4页
The influence of the panel position on the cooling performance of a radiant panel is analyzed.The coupled simulation of convection and radiation is set up by a computational fluid dynamics(CFD)method.The simulations... The influence of the panel position on the cooling performance of a radiant panel is analyzed.The coupled simulation of convection and radiation is set up by a computational fluid dynamics(CFD)method.The simulations with different panel positions and different indoor heat sources are used to calculate the cooling capacity of the radiant panel and the indoor thermal environment.The simulation results are in good agreement with the experimental results.The results show that when the indoor heat source temperature is low,the convective heat flux is the main influence factor of the cooling capacity and the radiant panel should be placed on the wall or on the ceiling.Otherwise,when the indoor heat source temperature is high,the radiation heat flux is the main factor and the radiant panel should be placed as near to the heat sources as possible. 展开更多
关键词 radiant panel panel position cooling capacity
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Thermal-environment characteristics and comfort of combined radiant-floor (Korean heating system ondol) and convective cooling system 被引量:3
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作者 LEE Kang-Guk HONG Won-Hwa 《Journal of Central South University》 SCIE EI CAS 2013年第12期3589-3603,共15页
The thermal-environment characteristics of the existing forced-convection cooling system were compared with those of the convective cooling system, which combined the radiant-floor cooling system using floor-heating p... The thermal-environment characteristics of the existing forced-convection cooling system were compared with those of the convective cooling system, which combined the radiant-floor cooling system using floor-heating panel typically applied to apartments in South Korea with the forced-convection cooling system using improved fan coil unit. The subjective warm/cool-feeling responses to the combined radiant-floor and convective cooling system in the questionnaire survey conducted among the test subjects were analyzed to establish the basic data for the combined cooling system. The results show that in the thermal-equilibrium condition, the vertical air temperature difference in the model living room is larger in the forced-convection-cooling condition. Most of the subjects feel a proper warm/cool feeling on their entire body, but they feel colder on the foot and lower body in the combined-cooling condition. 展开更多
关键词 convection cooling temperature ondol thermal comfort fan coil unit combined cooling system
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