Abstract Regenerators in standard pulse-tube refrigerators are expensive, complicated, heavy, and contribute significantly to the losses in the cooler. In this research the regenerators are avoided by using two identical GM-type pulse-tube refrigerators operating in opposite phase. The two regenerators are replaced by one counterflow heat exchanger. This system is called Counterflow Pulse-Tube Refrigerator (CFPTR). A theoretical treatment is given for the optimization of pulse-tube refrigerators with heat exchangers and regenerators. For a single-stage system the heat exchanger performance will be compared with the regenerator performance based on irreversible entropy production. A special feature of our system is that the position of the rotary valve and the heat exchanger can be interchanged, so the valve can work both at room temperature and at low temperature. A new design principle for the rotary valve has been used. It will be described and the performance will be discussed.
Counterflow Pulse-tube Refrigerator
Cryocoolers 13 ; 251-260
2005-01-01
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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