Sorption compressors are basically thermal compressors and have no moving parts. Therefore, they have the potential of an extremely long life and can operate with an absolute minimum vibration level. Furthermore, they can be scaled to small dimensions without deteriorating the efficiency. In this paper the realization of a 165 K demonstrator cooler and the design of a 5 K cooler for ESA's Darwin space mission is described. The demonstrator cooler operates with small stainless steel sorption compressor cells, micromachined check valves and a micromachined Joule-Thomson cold stage. After completion of the test experiments, the various elements are now integrated in the complete cooler. Because of the minimum vibration level, sorption cooling is very attractive in many space missions. ESA's Darwin mission is a specific example in which cooler vibration should be below 10 nm. Two sorption cooler configurations for Darwin are presented in the paper. Both have two JT-stages, the first stage with hydrogen as the working fluid, the second with helium. One cooler operates with a metalhydride/hydrogen compressor, the other with a charcoal/hydrogen compressor. Both have a charcoal/helium stage to establish 5 K with a cooling power of 10 mW.
Sorption Cooling
Sorptionskühlung
2001
16 Seiten, 9 Bilder, 2 Tabellen, 16 Quellen
Aufsatz (Konferenz)
Englisch
Absorptionskältemaschine , Aktivkohle , Demonstrationsmodell , Drosselventil , experimentelles Ergebnis , Flüssighelium , Flüssigwasserstoff , Helium , Kältemaschine , Kreisprozess , mechanische Schwingung , Metallhydrid , Mikrobearbeitung , mikromechanisches Gerät , Raumfahrt , Rückschlagventil , Tagungsbericht , Tiefsttemperaturtechnik , Tieftemperatur , Tieftemperaturtechnik , Wasserstoff , Kälteleistung
Sorption Cooling of Astrophysics Science Instruments
British Library Online Contents | 1996
|High-Temperature Waste Heat Driven Cooling Using Sorption Media
SAE Technical Papers | 1993
|FILLING DEVICE FOR A SORPTION STORE AND SORPTION STORE
Europäisches Patentamt | 2016
|