Refrigeration – Processes – Reducing pressure on compressed gas
Patent
1989-01-25
1990-06-19
Wayner, William E.
Refrigeration
Processes
Reducing pressure on compressed gas
62172, 62197, F28B 900
Patent
active
049341545
ABSTRACT:
A ram air cooling system for cooling electronic components in an aircraft ovides automatic switching from a high ram air speed cooling mode (ACM) to a low ram air speed cooling mode (RAM). The cooling system receives variable speed ram air during the flight of the aircraft and includes an automatically controlled valve for either directing high speed ram air to a precooling means prior to cooling the electronic components or directing low speed ram air directly to the electronic components without precooling. The automatically controlled valve is controlled by programmable logic module means for comparing the cooling efficiency of the electronic components by precooled ram air with the cooling efficiency of the electronic components by the non-precooled ram air. The cooling efficiencies are calculated from temperature measurements of the ram air at several locations in the system of the invention. Preferably, the ram air cooling means is an air turbine which extracts energy from the ram air to drive a compressor that compresses and discharges heated air that exits from the housing for the electronic components after the ram air has performed its cooling function.
REFERENCES:
patent: 2391838 (1945-12-01), Kleinhans et al.
patent: 2412110 (1946-12-01), Williams, Jr.
patent: 2453923 (1948-11-01), Mayo
patent: 2473496 (1949-06-01), Mayer
patent: 2669101 (1954-02-01), Shields
patent: 2706255 (1955-04-01), Breaux et al.
patent: 2767561 (1956-10-01), Seeger
patent: 2870964 (1959-01-01), Lindbom
patent: 2916890 (1959-12-01), Stein
patent: 2948518 (1960-08-01), Kraus
Altoz Frank E.
McClure John D.
Bechtel James B.
The United States of America as represented by the Secretary of
Tura James V.
Verona Susan E.
Wayner William E.
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