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Hot end loss at pulse tube refrigerators

✍ Scribed by J. Gerster; M. Thürk; L. Reißig; P. Seidel

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
142 KB
Volume
38
Category
Article
ISSN
0011-2275

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✦ Synopsis

Most pulse tube refrigerators need an additional heat exchanger at the hot end of the working space in contrast to other refrigerators with regenerators. There is a periodic, alternate gas flow which passes through this hot heat exchanger. Due to this fact the hot heat exchanger has to be considered not only with a desired recuperative effect but also with a regenerative effect. This regenerative effect of the hot end heat exchanger acts as a loss. In this contribution the so-called hot end loss is described by means of an orifice pulse tube refrigerator and is compared with that of a four valve pulse tube refrigerator. Experimental investigations on a four valve pulse tube refrigerator verify this loss. An orifice pulse tube refrigerator without hot end loss is presented.

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