Abstract
As for pulse tube refrigerators, it is difficult to understand the phenomena in pulse tube because gas in the pulse tube oscillates exchanging heat with wall. Therefore, it is necessary to measure temperature profile in the pulse tube and to calculate enthalpy flow in order to understand the phenomena. We adopted measurement using Rayleigh scattering in order to measure the temperature profile in the pulse tube. We made a pulse tube refrigerator with quartz-glass pulse tube. The pulse tube refrigerator was refrigerated in air. Only the regenerator was covered with insulators. Therefore, the pulse tube works as heat exchanger. Under the above conditions, the temperature profile in the pulse tube has been measured and visualized. Enthalpy flow, work flow and heat flow have been calculated from the measured temperature profile. The calculated work flow plus the calculated heat flow is equal to the calculated enthalpy flow. The calculated enthalpy flow shows the level of heat exchange in the pulse tube.
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