空间液氦温区J-T节流制冷机套管换热器优化
发布时间：2018-07-17 02:08
【摘要】：空间液氦温区J-T节流制冷机技术是目前深空探测任务的主要制冷技术,而逆流换热器是液氦温区J-T节流制冷机的关键部件之一.螺旋套管换热器结构简单,体积重量较小,在空间液氦温区J-T节流制冷机中被普遍采用.本文分析了螺旋套管换热器效率对节流循环的影响,并对换热器进行了理论分析和优化设计.分析表明减小螺旋套管换热器的管径和螺旋直径可以提高换热器的换热系数,进而提升换热器的效率.开展了相关的实验研究,实验结果验证了理论分析的正确性,证明提升套管换热器效率,可以降低节流循环对预冷量的需求,同时降低节流前温度,最终提高预冷型J-T节流制冷机的整机效率和制冷量.
[Abstract]:J-T throttling refrigerator technology is the main refrigeration technology in deep space exploration at present, and countercurrent heat exchanger is one of the key parts of J-T throttling refrigerator in liquid helium temperature region. The helical casing heat exchanger is widely used in J-T throttle chiller with simple structure and small volume and weight. In this paper, the effect of the efficiency of spiral casing heat exchanger on throttle circulation is analyzed, and the theoretical analysis and optimization design of the heat exchanger are carried out. The analysis shows that the heat transfer coefficient of the heat exchanger can be increased by reducing the diameter of the tube and the diameter of the spiral tube, and then the efficiency of the heat exchanger can be improved. The experimental results verify the correctness of the theoretical analysis. It is proved that raising the efficiency of casing heat exchanger can reduce the demand for precooling rate of throttle cycle and reduce the temperature before throttling. Finally, the efficiency and refrigerating capacity of the pre-cooled J-T throttle refrigerator are improved.
【作者单位】： 中国科学院理化技术研究所空间功热转换技术重点实验室;中国科学院大学;
【基金】：航空科学基金(20132446001) 国家重点基础研究发展计划(613322)资助
【分类号】：TB651
本文编号：2128554
[Abstract]:J-T throttling refrigerator technology is the main refrigeration technology in deep space exploration at present, and countercurrent heat exchanger is one of the key parts of J-T throttling refrigerator in liquid helium temperature region. The helical casing heat exchanger is widely used in J-T throttle chiller with simple structure and small volume and weight. In this paper, the effect of the efficiency of spiral casing heat exchanger on throttle circulation is analyzed, and the theoretical analysis and optimization design of the heat exchanger are carried out. The analysis shows that the heat transfer coefficient of the heat exchanger can be increased by reducing the diameter of the tube and the diameter of the spiral tube, and then the efficiency of the heat exchanger can be improved. The experimental results verify the correctness of the theoretical analysis. It is proved that raising the efficiency of casing heat exchanger can reduce the demand for precooling rate of throttle cycle and reduce the temperature before throttling. Finally, the efficiency and refrigerating capacity of the pre-cooled J-T throttle refrigerator are improved.
【作者单位】： 中国科学院理化技术研究所空间功热转换技术重点实验室;中国科学院大学;
【基金】：航空科学基金(20132446001) 国家重点基础研究发展计划(613322)资助
【分类号】：TB651
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