Influence of several irreversible losses on the performance of a ferroelectric Stirling refrigeration-cycle |
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| Affiliation: | 1. School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Sun Yat-Sen University and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China;2. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics (LAGEO/IAP), Chinese Academy of Sciences, Beijing 100029, China;3. Department of Physics, University of Maryland at Baltimore County (UMBC), Baltimore, MD 21250, United States;4. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites (LRCVES/CMA), National Satellite Meteorological Center, China Meteorological Administration (NSMC/CMA), Beijing 100081, China;5. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing (LIESMARS), Wuhan University, Wuhan 430072, China;6. Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China |
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| Abstract: | An irreversible cycle model of the Stirling refrigeration-cycle, using a ferroelectric material as the working substance, is established. Several irreversibilities due to thermal resistances between the working substance and the heat reservoirs, regenerative losses in two regenerative processes, and heat-leak loss between the heat reservoirs are taken into account. The influence of these irreversible losses on the performance of the ferroelectric Stirling refrigeration-cycle is analyzed, based on a general expression of the polarization of ferroelectric materials and a linear heat-transfer law. The cooling rate is optimized for a given power input. Some fundamental optimal relations and general performance characteristic curves of the cycle are obtained. The maximum cooling rate and other relevant performance parameters are determined. Some special cases are discussed in detail. When the regenerative losses are neglected, the results obtained may be directly used to describe the optimal performance of a ferroelectric Carnot refrigeration-cycle. Moreover, it is expounded that the calculated results are very general and also suitable for the ferroelectric Stirling and Carnot refrigeration cycles whose working substances obey the Curie–Weiss law and Curie law. |
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