Fluid handling – Processes – Involving pressure control
Patent
1999-03-26
2000-11-28
Chambers, A. Michael
Fluid handling
Processes
Involving pressure control
137340, 13762533, 137561A, 251127, F16L 5518
Patent
active
061521582
ABSTRACT:
This invention provides a gas wave pressure regulation method and apparatus, gaseous wave pressure regulator (GWPR), associated with a pressure energy recovery system which can be used in the processes of petrochemical and liquid natural gas (LNG) industries to recover the lost energy in a regulating process where a pressure regulation is needed to reduce the pressure level fitting the operating conditions, but the spontaneous temperature is undesirable. The said method and apparatus employ a mechanism creating a unsteady periodic flow by means of gaseous wave resonant interactions to convert the energy between the pressure drop into the form of heat without using any moving parts. The said heat is reused inside the GWPR to eliminate or diminish the temperature drop associated with the pressure regulation. The said pressure energy recovery system comprises a primary GWPR followed by a primary heat exchanger, and a secondary GWPR linked by a secondary heat exchanger operated in series. The GWPR in the present invention consists of a flow rate controlling unit, a flow induction unit, and a pressure energy converting unit. The operation of the GWPR is based on gaseous wave interactions between shock wave in high speed jets and longitudinal oscillation of gas column in resonant tubes by which the pulsating flow production can recover the pressure energy lost in the regulating process.
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