Preliminary feasibility studies, based on refrigeration thermodynamics, have been conducted for candidate power conditioning components in a 1MWe terrestrial/transportable cryogenic power system. The cryogenic power system being considered has a superconducting generator for high power applications such as the power source for a Ground Based Radar (GBR) System. While the superconducting generator operates at 77 deg K or lower, the present analysis indicates that significant benefits cannot be derived by cooling the various components of the power conditioning system to such low temperatures. It was found that, by operating the power conditioning component at 150 deg K instead of at 77 deg k the overall system efficiency was not jeopardized by way of large input power requirements to dissipate small refrigerator loads. This is an acute problem as current cryogenic refrigeration systems allow for very low levels of energy dissipation while performing at about 7 to 10 % of the Carnot coefficients of performance between 300 deg K and 77 deg K.
Effects of refrigeration in a transportable cryogenic aerospace application
Effekte der Kälteerzeugung bei einer transportablen kryogenischen Luft- und Raumfahrtanwendung
1995
6 Seiten, 7 Bilder, 2 Tabellen, 12 Quellen
Conference paper
English
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