Abstract A 10K cooler is being developed for space applications. It is a further extension of a Rutherford Appleton Laboratory (RAL) 20K cooler being space qualified at Matra Marconi Space Systems (MMS). New features include; optimised geometry, enhanced regenerators and a larger compressor system. This cooler differs from the 20K cooler in many ways. The larger pressure swing and lower temperatures create problems when trying to model the thermodynamic processes. In this region the regenerator and the working gas heat capacities are strong functions of temperature and this creates difficulties in the modelling. In addition the pressure swing in the cooler is high, leading to distortions in the pressure waveform in the cold end of the cooler. This paper describes some of the techniques used in developing an optimised geometry for this cooler. Various computer models have been used in conjunction with experimental data. In particular the pressure drop down the cooler has been measured in order to verify the computer model and to ensure that the pressure drop losses and regenerator geometry are correct. The hardware programme leading to a full proof of concept demonstration will be explained. The first hardware test involves the use of four MMS compressors into the standard RAL 20K cooler displacer. This doubles the compression space swept volume over the standard cooler. The outputs from the revised RAL model will be used to define the geometry of the 10K cooler. MMS will perform the detail design, manufacture and proof of concept programme.
Progress Towards the Development of a 10K Closed Cycle Cooler for Space Use
Cryocoolers 10 ; 67-76
2002-01-01
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Progress towards the Development of a 10K Closed Cycle Cooler for Space Use
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