Refrigeration – Automatic control – Air compessor – cooler and expander
Patent
1994-06-21
1995-08-08
Capossela, Ronald C.
Refrigeration
Automatic control
Air compessor, cooler and expander
62402, 62 57, F28B 900
Patent
active
054388457
ABSTRACT:
A refrigeration device in which a heat load is refrigerated within a refrigeration chamber. Refrigerant is supplied, preferably, from a supply of turboexpanded air employing a compressor to compress the air and a turboexpander to expand the compressed air to a low temperature. A venturi-like device such as an ejector circulates the refrigerant within a circulation path within the refrigeration chamber so that heat is transferred from the heat load to the refrigerant. An incoming mass flow rate of the refrigerant is delivered to a high pressure inlet of the venturi-like device and a recirculation mass flow rate of the refrigerant is received within the low pressure inlet from the circulation path after the refrigerant has heat transferred thereto. A high pressure outlet discharges a mixture of the refrigerant that comprises the incoming and recirculation mass flow rates to the circulation path and prior to the heat load. Controls are provided to either control the recirculation mass flow rate of the refrigerant or a by-pass flow of refrigerant in a by-pass line communicating between the high pressure inlet and outlet. Such control acts to control circulation within the circulation path.
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Kirschner Mark J.
Lee Ron C.
Capossela Ronald C.
Cassett Larry R.
Rosenblum David M.
The BOC Group Inc.
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