Compact Four-Valve Pulse Tube Refrigerator in Coaxial Configuration
The experimental results of a modified double inlet pulse tube refrigerator without a reservoir are presented in this paper. The reservoir is replaced by a special control unit with a rotary valve. The hot end heat exchanger is cooled with air by natural convection. These facts are favourable for future miniaturisation and multistaging. The estimation of the gross refrigeration power based on the enthalpy flow model is presented. The system reaches a cold end temperature of 80 K within 20 min and attained at 77 K a net refrigeration power of about 5 W.
KeywordsNeedle Valve Cooling Power Pulse Tube Enthalpy Flow Rotary Valve
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- 1.Kaiser, G., Seidel, P., Thiirk, M., “Disturbance reduction of cryo-refrigerators”, Applied Superconductivity, (1993) pp. 1617-1620.Google Scholar
- 2.Matsubara, Y., Tanida, K., Gao, J. L., Hiresaki, Y., Kaneko, M., “Four-Valve Pulse Tube Refrigerator”, Proceedings of Fourth Joint Sino-Japanese Seminar on Cryocoolers and Concerned Topics. Beijing (1993), pp. 54-58.Google Scholar
- 3.Ishizaki, Y., Ishizaki, E., “Experimental Performance of Modified Pulse Tube Refrigerator below 80 K down 23 K”, Proceedings of the 7 th International Cryocooler Conference. PL-CP—93-1001, Santa Fe (1993), pp. 140-146.Google Scholar
- 4.Seidel, P., Thürk, M, “Pulse-Tube Concept for Practical Use in Cryoelectronics”, Advances in Cryogenic Engineering, vol. 39, Plenum Press, New York, to be published.Google Scholar
- 5.Radebaugh, R., “A Review of Pulse Tube Refrigeration”, Advances in Cryogenic Engineering, vol. 35, Plenum Press, New York (1990), pp. 1191–1205.Google Scholar
- 6.Kaiser, G., Dörrer, L., Matthes, A., Seidel, P., Schmidl, F., Schneidewind, H., Thürk, M., “Cooling of HTSC Josephson Junctions and SQUID’s with Cryo-Refrigerators”, Cryogenics (ICEC-15). to be published.Google Scholar