Development of a cryogenic heat exchanger

摘要

In the period December 1994 to July 1996, a cryogenic heat exchanger had been developed by Microtecnica, under a direct contract to ESA/CNES. The heat exchanger has been designed to prewarm liquid oxygen using HFC-134a. The main tasks were the trade-off of the thermal path concept, the definition of the structural configuration, the selection of manufacturing methods and the component testing. Two test benches have been realized for the circulation of the oxygen (by AirLiquide) and for the circulation the HFC-R134a. No mechanical failures or thermodynamic malfunctions have been encountered during all the test campaigns. The performances are applicable for fuel cells and manned systems.