Boots – shoes – and leggings
Patent
1987-05-19
1989-04-25
Lall, Parshotam S.
Boots, shoes, and leggings
364494, 364550, 415 11, F04D 2702
Patent
active
048253804
ABSTRACT:
A supervisory computer is provided for controlling a compressor wherein a computer generated set point manipulates flow in a recycle line from the compressor outlet to inlet. The supervisory computer manipulates the recycle flow so as to prevent the compressor from surging due to changes in flow rate, pressure or the molecular weight of the gas being compressed. The molecular weight of the gas is calculated on-line from actual measurements of flow, pressure, temperature and speed along with compressor performance data that is prestored in the computer. In addition the supervisory computer automatically maintains a minimum flow for the compressor that is as close as possible to the surge limit without danger of putting the compressor into surge due to changes in flow, pressure or molecular weight of the gas being compressed.
REFERENCES:
patent: 4156578 (1979-05-01), Agar et al.
patent: 4203701 (1980-05-01), Abbey
patent: 4230437 (1980-10-01), Bellinger et al.
patent: 4493608 (1985-01-01), Paul
Staroselsky, et al., "Improved Surge Control for Centrifugal Compressors" Chemical Engineering, May 21, 1979, pp. 175-184.
Bogatie George E.
Lall Parshotam S.
Phillips Petroleum Company
Ramirez Ellis B.
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