Abstract
A sorption compressor requires heat switches to thermally isolate the cells during heating, and to connect them to a heat sink during cooling. The requirements for these heat switches are discussed and related to important compressor parameters. It is shown that under certain conditions a sorption compressor can be operated without heat switches at all. Furthermore, the static heat transfer behaviour of a gas gap is modelled in detail and compared with experiments on a 300 μm gas gap. Finally, the dynamics that limit the switching speed are discussed.
Keywords
Heat Transfer Coefficient Thermal Resistance Heat Sink Thermal Mass Sorption Material
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References
- 1.Burger, J.F., ter Brake, H.J.M., Elwenspoek, M., Rogalla, H., Microcooling: Study on the application of micromechanical techniques, Cryocoolers 9, Plenum Press, New York (1997), pp. 687–696.Google Scholar
- 2.Burger, J.F., Holland, H.J., Wade, L.A., ter Brake, H.J.M., Rogalla, H., Thermodynamic considerations on a microminiature sorption cooler, Cryocoolers 10, Plenum Press, New York (1998).Google Scholar
- 3.Chan, C.K., Self-actuated heat switches for redundant cryocoolers, Proc. 2nd Interagency Meeting on Cryocoolers, Easton MD (1986).Google Scholar
- 4.Bard, S., Jones, J.A., Regenerative sorption compressors fro cryogenic refrigeration, Advances in. cryogenic engineering, Vol. 35, Plenum Press, New York (1990).Google Scholar
- 5.Johnson, D.L., Wu, J.J., Feasibility demonstration of a thermal switch for dual temperature IR focal plane cooling, Cryocoolers 9, Plenum Press, New York (1997).Google Scholar
- 6.Kashani, A., Helvensteijn, B.P.M., McCormack, F.J., Spivak, A.L., Helium liquid-and gas-gap heat switches, Proc. 7th Cryocooler Conf. (1992), pp. 355–370.Google Scholar
- 7.Roth, A., Vacuum technology, Elsevier, Amsterdam (1990).Google Scholar
- 8.Corruccini, R.J., Gaseous heat conduction at low pressures and temperatures, Vacuum (1959).Google Scholar
- 9.Wade, L.A., Performance, reliability, and life of hydride compressor components for 10 to 30 K. sorption Cryocoolers, Adv. in Cryogenic Eng., vol. 39, Plenum Press, (1994), pp. 1483–1490.Google Scholar
- 11.Bowman, R.C., Personal communication (1998).Google Scholar
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© Kluwer Academic Publishers 2002