Buffered rotary valve system of GM-type pulse tube refrigerator

Abstract

The buffered rotary valve system was invented to make a valved refrigeration system more efficient. This paper introduces its basic design and operation process, and describes the experimental performance results. The mass flow rate was reduced and the coldhead temperature at no load condition became lower than that of the conventional rotary valve system even though the improvement was not so much as we expected. The experimental results are discussed with the effect of the orifice reservoir of double inlet PTR (Pulse Tube Refrigerator), and the prospect of buffered rotary valve system is suggested.