scholarly journals First results from solid state neutral particle analyzer on experimental advanced superconducting tokamak

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Y. B. Zhu ◽  
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W. W. Heidbrink ◽  
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A. Bortolon ◽  
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Vol 77 (10) ◽  
pp. 10F113 ◽  
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D. Liu ◽  
W. W. Heidbrink ◽  
D. S. Darrow ◽  
A. L. Roquemore ◽  
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2004 ◽  
Author(s):  
K Shinohara ◽  
D Darrow ◽  
A Roquemore ◽  
S Medley ◽  
F Cecil

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2021 ◽  
Vol 32 (7) ◽  
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Wei-Ping Lin ◽  
Pei-Pei Ren ◽  
Guo-Feng Qu ◽  
Jing-Jun Zhu ◽  
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Author(s):  
Marvin Schmidt ◽  
Andreas Schütze ◽  
Stefan Seelecke

Energy saving and environmental protection are topics of growing interest. In the light of these aspects alternative refrigeration principles become increasingly important. Shape memory alloys (SMA), especially NiTi alloys, generate a large amount of latent heat during solid state phase transformations, which can lead to a significant cooling effect in the material. These materials do not only provide the potential for an energy-efficient cooling process, they also minimize the impact on the environment by reducing the need for conventional ozone-depleting refrigerants. Our paper, presenting first results obtained in a project within the DFG Priority Program SPP 1599 “Ferroic Cooling”, focuses on the thermodynamic analysis of a NiTi-based cooling system. We first introduce a suitable cooling process and subsequently illustrate the underlying mechanisms of the process in comparison with the conventional compression refrigeration system. We further introduce a graphical solution to calculate the energy efficiency ratio of the system. This thermodynamic analysis method shows the necessary work input and the heat absorption of the SMA in stress/strain- or temperature/entropy-diagrams, respectively. The results of the calculations underline the high potential of this solid-state cooling methodology.


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