Cooling Techniques For Walk-in And Drive-in Environmental Test Chambers By Bemco Inc
Bemco Cascade DX (direct growth within the heat exchanger) cooling techniques are much like Single Stage DX except two refrigeration methods are provided. The primary stage (the “High Stage” refrigeration system) condenses the second stage (the “Low Stage” refrigeration system) while the second stage cools the method – as an illustration the chamber air. An early article describing the principals of operation of the sort of system is offered right here.
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Within the valve cavity 24 is a stress operated closure member 33, here proven as a diaphragm which may be made of aluminum or different appropriate material, with a heart portion 34 biased toward valve closing position as shown in FIG. 6 and a peripheral portion 35 clamped between the upper and decrease valve parts 36 and 37 and retained there by the securing bolts 38 and 41. In one embodiment of such a diaphragm utilizing liquid carbon dioxide as the liquid cryogen the peripheral portion 35 was 0.062 inch thick aluminum and was 0.006 inch higher at the middle 34. This increased middle 34 as shown in solid lines in FIG. 6 biased the diaphragm towards closed position.
