Evaporation heat exchanger apparatus for removing heat
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United States of America Patent
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Oct 19, 1993
Grant Date -
N/A
app pub date -
Sep 4, 1992
filing date -
Sep 14, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Heat generated, for example, in a spacecraft under zero gravity conditions and different accelerations is discharged through an evaporation heat exchanger connected to at least one active coolant circulation circuit. The heat exchanger has a bundle of tubes axially arranged inside a cylindrical processing chamber. An evaporant passes through these tubes. A coolant flows into heat exchange contact with outer surfaces of said tubes. The outlet cross-sectional flow area for the evaporant, or rather its vapor, is variable so that the pressure of the evaporated medium, and thereby also its evaporation temperature are adjustable. The adjustment of the cross-sectional flow area for the vapor is controlled in response to the temperature of the cooling liquid or coolant where it enters into a processing chamber of the heat exchanger. Selectively closable apertures in an end plate (52) serve for changing the outlet cross-section flow area for the vapor. The apertures are, at least partially, closable by flaps which are controlled by bimetal springs responsive to the temperature of the entering coolant.
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