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Micro Cryogenic Coolers With Mixed Refrigerants
Volume 1: Advanced Packaging; Emerging Technologies; Modeling and Simulation; Multi-Physics Based Reliability; MEMS and NEMS; Materials and Processes, 2013A number of small electronic devices benefit from micro-scale low temperature operation. Recently we have developed micro cryogenic coolers (MCCs) using a low-pressure, mixed-refrigerant Joule-Thomson cycle. The cryocoolers utilizes a MEMS-enabled gas compressor coupled to a micro cold stage.
Ryan Lewis +5 more
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Optimal Design of Mixed Refrigerant Cycles
Industrial & Engineering Chemistry Research, 2008A new approach for the optimal design of mixed refrigerant cycles is presented. It is based on mathematical programming and offers significant improvements in relation to previous approaches. It includes multistage refrigerant compression, full enforcement of the minimum temperature difference in heat exchangers, simultaneous optimization of variables,
Frank Del Nogal +3 more
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The Effect of Refrigerants in the Mixed Lubrication Regime
1997Because of environmental concerns, CFC (chlorofluorocarbon) refrigerants must be replaced with HFCs (hydrofluorocarbons.) As a result, many tribological problems are caused especially in rotary piston compressors. To solve the problem, the effects of refrigerants on friction and wear characteristics of the oil and refrigerant mixtures at the mixed ...
K Mizuhara, M Tomimoto
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Properties of Gas Mixtures and Their Use in Mixed-Refrigerant Joule-Thomson Refrigerators
AIP Conference Proceedings, 2004The Joule‐Thomson (J‐T) effect has been widely used for achieving low temperatures. In the past few years, much progress has been made in better understanding the working mechanism of the refrigeration method and in developing prototypes for different applications. In this talk, there are three aspects of our research work to be discussed.
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Real-time measurement of mixing ratio of refrigerant/refrigeration oil mixture
International Journal of Refrigeration, 2006The mixing of refrigeration oil with refrigerant in a refrigeration cycle has great influence on cycle performance. A sampling method is the most general way to measure the mixing ratio of refrigerant and refrigeration oil. Since the sampling method is time-consuming and reduces the amount of refrigerant and oil in the cycle, a real-time measurement is
Mitsuhiro Fukuta +3 more
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Journal of Cleaner Production, 2018
Abstract This study progresses absorption, mixed refrigerant and mixed fluid cascade refrigeration systems in the integrated cryogenic natural gas plant. It also presents a comprehensive systematic method for designing of refrigeration cycles based on synthesis of mathematic and thermodynamic viewpoints.
Bahram Ghorbani +3 more
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Abstract This study progresses absorption, mixed refrigerant and mixed fluid cascade refrigeration systems in the integrated cryogenic natural gas plant. It also presents a comprehensive systematic method for designing of refrigeration cycles based on synthesis of mathematic and thermodynamic viewpoints.
Bahram Ghorbani +3 more
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NON-AZEOTROPIC MIXED REFRIGERANT AND REFRIGERATING APPARATUS USING NON-AZEOTROPIC MIXED REFRIGERANT
2021SEO CHANGHO +3 more
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