Results 261 to 270 of about 10,659 (309)
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Refrigeration for superconductors
Proceedings of the IEEE, 2004Temperatures in the range of 0.05 to 80 K are required for most applications of superconductors. Refrigeration powers range from fractions of a watt for many electronic applications to kilowatts for some large magnet and power applications. This paper reviews the various types of refrigeration methods currently available to meet the needs of various ...
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Journal of the American Medical Association, 1946
In war, problems of shock and trauma attain even more than their usual importance. A more general understanding of the newer ideas and methods may sometimes improve therapeutic results. In 1939 Allen1proposed the theory of a dual mechanism in shock.
L W, CROSSMAN, F M, ALLEN
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In war, problems of shock and trauma attain even more than their usual importance. A more general understanding of the newer ideas and methods may sometimes improve therapeutic results. In 1939 Allen1proposed the theory of a dual mechanism in shock.
L W, CROSSMAN, F M, ALLEN
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MRS Proceedings, 1994
AbstractThe principles of thermionic refrigeration are explained. The simplest device is composed of two metal plates separated by a vacuum gap. This device is efficient at room temperature only for plates with small work functions (eø <0.3 eV).
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AbstractThe principles of thermionic refrigeration are explained. The simplest device is composed of two metal plates separated by a vacuum gap. This device is efficient at room temperature only for plates with small work functions (eø <0.3 eV).
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A multipurpose 3He refrigerator
Cryogenics, 2006Abstract We introduce a mini 3 He refrigerator, operating at ∼300 mK starting from 4.2 K without pumping on the main 4 He bath. The innovative idea is that the present one is suitable for a very fast operation; for its use, it is sufficient a storage 4 He Dewar.
L. PIZZO +3 more
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Refrigeration for Photomultipliers
Applied Optics, 1966A closed-cycle mechanical refrigeration system has been adapted to cool photomultipliers automatically. Temperature is adjustable between +50 degrees and -55 degrees C and is stable to within +/-0.30 degrees C. An important feature of the design is the flexible connection to the cold box which allows extensive freedom of motion; this freedom is ...
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Refrigerants for vapour compression refrigeration systems
Resonance, 2012With the mandate of Montreal Protocol banning ozone depleting substances, and Kyoto Protocol later on curtailing the use of substances which contribute to global warming, conventional refrigerants are to be replaced by environment-friendly working fluids.
G. Venkatarathnam, S. Srinivasa Murthy
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Performance Improvement of the Refrigerating System in Refrigeration Storage
2020A cold storage is a food cold storage for storage of perishable foods. The refrigeration effect of the cold storage does not meet the expected requirements. It is necessary to carry out operation and debugging to find out the reasons for the unsatisfactory cooling effect, and finally achieve the expected cooling effect.
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Refrigeration systems with minimum charge of refrigerant
Applied Thermal Engineering, 2007Concern for the environmental effects of HFC-refrigerants as well as the use of flammable refrigerants has resulted in a need of decreasing the refrigerant charge in refrigeration and heat pump systems. This paper discusses the possibility of such reductions, both at the systems- and the component level. It is shown that a move towards indirect systems,
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1994
The demand for ways to reliably estimate the expected efficiency and power density of magnetic refrigerators led in past years to increasing efforts to develop computational models and numerical simulation of magnetic refrigeration processes. Such methods, in addition, provide a better understanding of the loss mechanisms in magnetic refrigerators and ...
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The demand for ways to reliably estimate the expected efficiency and power density of magnetic refrigerators led in past years to increasing efforts to develop computational models and numerical simulation of magnetic refrigeration processes. Such methods, in addition, provide a better understanding of the loss mechanisms in magnetic refrigerators and ...
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R290 Refrigerant Performance in a Commercial Refrigerator
Çukurova Üniversitesi Mühendislik Fakültesi DergisiIn this study, we investigated the impact of the environmentally friendly R290 refrigerant, which has a higher Coefficient of Performance (COP), on the operating performance of the cooling system, as an alternative to the commonly used R404A refrigerant, which has a negative effect on global warming.
Turhan Saraç, Mahmut Ünaldı
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