Experiment to determine properties of packed particle beds and regenerators at cryogenic temperaturesStudies related to the development of magnetic refrigeration and heat pump systems in temperature ranges from 4 K to ambient temperature and above have been conducted, taking into account the testing of the properties of packed-particle beds and regenerators at cryogenic temperatures as low as 4 K as an essential part of these studies. The present paper provides a description of the developed experimental apparatus and presents the results of recent measurements on packed-particle beds in the liquid helium and liquid nitrogen temperature ranges. Attention is given to a schematic of the apparatus and the data acquisition system, the various modes of gas flow, a schematic of a typical test bed with thermocouple positions, the calculation of transient heat transfer rates at different positions in the bed, the governing equations, and the procedures used for solving these equations.
Document ID
19850044357
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Barclay, J. A. (Los Alamos Scientific Lab. NM, United States)
Overton, W. C., Jr. (Los Alamos Scientific Lab. NM, United States)
Stewart, W. F. (Los Alamos National Laboratory Los Alamos, NM, United States)
Sarangi, S. (Indian Institute of Technology, Kharagpur, India; Los Alamos National Laboratory, Los Alamos NM, United States)