共查询到20条相似文献,搜索用时 187 毫秒
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应用有限时间热力学理论,建立铁磁斯特林制冷循环模型,考虑有限速率热传导、回热损失和回热时间等因素,基于铁磁材料的热力学性质,导出铁磁斯特林制冷循环的优化性能,进而研究热阻及回热损失对铁磁斯特林制冷机生态学优化性能的影响,所得结论可为铁磁斯特林制冷机的研制和设计提供理论指导. 相似文献
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通过对脉管型斯特林制冷机的分析和讨论,提出了此类制冷机的物理模型,对能量方程进行了推导,并编制了程序。计算结果显示,脉管斯特林制冷机在较高的制冷温区比单纯的斯特林制冷机有更大的制冷系数和更高的制冷量。 相似文献
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空间制冷技术在星载红外遥感器中的应用与发展 总被引:9,自引:5,他引:4
介绍了星载红外遥感器对空间低温制冷技术的要求,综述了长寿命空间低温制冷技术在星载红外光学遥感器中的应用,分析了空间红外遥感器低温制冷技术的现状和发展趋势,指出我国的空间低温制冷技术正向大冷量、长寿命、高可靠性方向发展,并在此基础上讨论了中国空间低温制冷技术的发展方向和应用前景。 相似文献
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The experimental prototype described in this work is a hybrid refrigerator that combines the active magnetic refrigeration effect with the Stirling gas regenerative refrigeration effect. In this prototype, gadolinium sheets are packed in the regenerator matrix for both Stirling and active magnetic regenerative refrigeration. Experimental tests were carried out to measure the cooling performance of this hybrid prototype. The influence of the phase angle on the cooling performance was investigated, and a reasonable phase angle of 90° was determined to obtain optimal cooling performance. By combining the two refrigeration effects, a minimum cooling temperature without heat load of 3.5 °C was reached, which is lower than that of 6.5 °C for the pure Stirling refrigeration effect without the magnetic cooling effect. The results of this study show that the cooling performance is improved by 24% for the hybrid effects compared with that exploiting only the Stirling gas refrigeration effect. 相似文献
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The world-wide of refrigeration applications is the result of expanding markets, international competition and improved products based on advanced technology. This plenary lecture outlines the potential impact of technical advances in solid-state microelectronics and computers, new working fluids and space-age structural materials on refrigeration products of the 1990s. Future equipment developments that are reviewed include advanced compressors, solid-state drives, desiccant cooling systems and products such as engine-driven and Stirling heat pumps. Environmental impact of CFCs and the recent breakthroughs in superconducting materials are likely to create both disruptions and opportunities for refrigeration in the next decade.
Résumé
The world-wide of refrigeration applications is the result of expanding markets, international competition and improved products based on advanced technology. This plenary lecture outlines the potential impact of technical advances in solid-state microelectronics and computers, new working fluids and space-age structural materials on refrigeration products of the 1990s. Future equipment developments that are reviewed include advanced compressors, solid-state drives, desiccant cooling systems and products such as engine-driven and Stirling heat pumps. Environmental impact of CFCs and the recent breakthroughs in superconducting materials are likely to create both disruptions and opportunities for refrigeration in the next decade. 相似文献15.
概述回热式气体制冷技术的现状和前景,对PT,G-M,St和Boreas等各种制冷机的重大技术革新进行了扼要介绍,指出发展趋势。 相似文献
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This paper reviews recent activities in refrigeration technology in Japan. The projects described are stimulated by growing industrial needs or form part of large national projects. The JNR project on the MAGLEV train is currently the most powerful activity and it demands knowledge in all the different disciplines of cryogenics in particular on various scales of refrigeration. Research activities are also directed towards the development of Stirling cycle and magnetic refrigerators for applications in a wider area. 相似文献
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静态真空是星载斯特林制冷机在地面进行各项性能试验的必备条件,它主要由杜瓦和真空保持系统组成。主要介绍斯特林制冷机杜瓦和真空抽气系统的设计。通过试验证明,该系统能够满足斯特林制冷机进行性能试验所需的真空条件。 相似文献
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对脉管型斯特林制冷机用于普冷的可行性进行了分析研究。用实验的方法对脉管到斯特林制冷机和单纯的斯特林制冷机的性能进行了对比,得出了在245K以上温区脉管型斯特林制冷机的性能优于单纯的斯特林制冷机的重要结论.对小孔和脉管长度变化对脉管型斯特林制冷机性能的影响进行了讨论. 相似文献
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A high pressure hybrid refrigerator that combines the active magnetic refrigeration effect with the Stirling cycle refrigeration effect at room temperature is studied here. In the apparatus, a helium-gas-filled alfa-type Stirling refrigerator uses Gd sheets as the regenerator and the regenerator is put in a magnetic field varying from 0 to 1.4 T, which is provided by a Halbach-type rotary permanent magnet assembly. With an operating pressure of 5.5 MPa and a frequency of 2.5 Hz, a no-load temperature of 273.8 K was reached in 9 minutes, which is lower than that of 277.6 K for pure Stirling cycle. For the hybrid operation, cooling powers of 40.3 W and 56.4 W were achieved over temperature spans of 15 K and 12 K, respectively. For the latter case, the cooling power improves by 28.5% if compared with that exploiting only the Stirling cycle refrigeration effect. 相似文献