An experimental investigation of pulse tube refrigeration heat transfer rates
Abstract
Experiments have been performed to show that the heat exchanges between the gas and the walls are more important in the basic pulse tube than in the orifice pulse tube. It is shown that the R/delta ratio well characterizes these heat exchanges. A new concept for describing pulse tube operation is introduced which involves gas-gas heat exchanges. It is shown qualitatively that there must exist heat exchanges elsewhere than in the heat exchangers. An experimental apparatus is described which makes it possible to study these parameters and to obtain good performance. An 85-K temperature limit and a 4-W cold power at 100 K were achieved.
- Publication:
-
Advances in Cryogenic Engineering. Vol. 35B - Proceedings of the 1989 Cryogenic Engineering Conference
- Pub Date:
- 1990
- Bibcode:
- 1990ACGE...35.1231D
- Keywords:
-
- Cryogenic Cooling;
- Heat Transfer Coefficients;
- Refrigerators;
- Regenerative Cooling;
- Temperature Gradients;
- Pressure Ratio;
- Temperature Distribution;
- Working Fluids;
- Engineering (General)