The design and study of a reciprocating helium compressor

This paper discusses the possibility and the performance of a helium compressor modified from a commercial air conditioning, reciprocating compressor. Modifications to the compressor include an oil injection system and new type lubricant. The exhaust helium temperature will be much higher than that allowed if we just operate this compressor without any modifications. Hence a new cooling method has been developed to intensify the heat exchange of the helium gas in the cylinder with the lubricant oil so an acceptable lower discharge temperature can be obtained. A temperature reduction of more than 70 degrees C was achieved in the experiments.