Refrigeration – Storage of solidified or liquified gas – Spraying of cryogen
Patent
1982-08-16
1985-10-15
Capossela, Ronald C.
Refrigeration
Storage of solidified or liquified gas
Spraying of cryogen
62511, 165174, F17C 702
Patent
active
045466106
ABSTRACT:
Time dependent fluctuations in a low pressure drop heat exchanger can be prevented by incorporating an improvement into the heat exchanger and practicing a method relating to the pressure drop across the heat exchanger tubes. The improvement comprises an orifice at or near the inlet of the tube wherein the flow flowing into the tube at a liquid inflow rate enters the tube in the liquid state and is then converted while in the tube into a gaseous state at some point downstream from the orifice. The tube is characterized at a given pressure. The fluid, now in a gaseous state, exits the tube at a gas outflow rate. The orifice is disposed at the input of the tube and is sized to provide an inlet pressure drop across the orifice to the liquid which enters the tube at a magnitude equal to a fractional portion of the low pressure drop across the tube itself. This magnitude is at least large enough so that the absolute magnitude of the change in the gas outflow rate produced by any given change in the tube pressure is greater than the absolute magnitude of the change in the liquid inflow rate produced by the same given change in the tube pressure.
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