Gas compressor

About: Gas compressor is a research topic. Over the lifetime, 91817 publications have been published within this topic receiving 552209 citations.

Vortex air cleaner and self-cleaning barrier filter assembly for supercharged engines

Abstract: An air cleaner assembly is provided for supercharged engines including a supercharger compressor, comprising a vortex air cleaner upstream of the supercharger compressor, and a rotatable barrier filter cartridge that is self-cleaning downstream of the supercharger compressor.

Scroll Compressor Analytical Model

Abstract: The efficiency of the scroll compressor which employs the axial and the radial sealing techniques is competitive with that of the other rotary and the reciprocating compressors. The bearing load and the torque are smooth so that quiet operation is realized. 'l'herefore the machine is suitable particularly for air conditioning application. The authors have studied the scroll compressor which utilizes an involute of a circle. The displacement volume is calculated. The axial, tangential and radial pressure components are then obtained by assuming the isentropic or polytropic processes. The equations of motion are established for the orbiting scroll and the Oldham coupling. These equations are solved analytically and the motion of the orbiting scroll and the Oldham coupling is calculated. The motion of the orbiting scroll is influenced by the inertia force of the Oldham coupling, and the radial sealing force changes with a frequency twice that of the rotation. The overturning moment \lhich acts on the orbiting scroll is estimated, and the stability condition for the orbiting scroll is clarified. INTRODUCTION The scroll machine was invented by Creuxll in 1905 and is currently attracting the designers' attention because of its high efficiency and smooth operation. Application for car compressors and air conditioning is commercialized in Japan2l ,3), 4) and further development is expected. Axial and radial sealing are the most critical techniques and have been recognized from the old days. Creuxll referred to the tip seal (steam-tight in Reference (1)) which was pressed axially by the spring. The radial sealing techniques are 487 also known;S) ,6) they employ the centrifugal force of the rotating parts or produce the radial component from the pressure load by a mechanism like the swing link. The idea of the scroll fluid machinery was introduced; it was eguipped with axial and tangential sealing7),8). The practical development of this scroll compressor was also conducted9 l ,10). The scroll compressor appeared on the market in 1981 utilizing these two sealing techniques2l . The authors realized that the scroll compressor has inherent advantages (good sealing, smooth operation, stillness, no valve, simple structure, low rubbing speed, etc.) and analyzed the machine theoretically. The displacement volume is obtained from the geometric character of the involute of a circle. The tangential, radial and axial pressure loads are calculated by assuming the isentropic or polytropic compression processes. The motion of the orbiting scroll and the Oldham coupling has not been studied so far. To clarify the design conditions, the equations of motion are established for these two parts of the scroll compressor, including the friction. The equations are solved analytically and the forces acting on the orbiting scroll and the Oldham coupling are calculated. The inertia force of the Oldham coupling istransmitted to the orbiting scroll. The radial sealing force is necessarily influenced and changes with a frequency twice that of the rotation. The overturning moment which acts on the orbiting scroll is estimated, and the stability condition is given for the orbiting scroll. GEOMETRIC THEORY OF SCROLL COMPRESSOR Oisplacement Volume and Build-in Volume Ratio The major geometric parameters of the scroll are shown in Fig. 1. y a fbllus cl a Ba!e Cirde SOOII Atdl Scroll Thickness Scroll~ I 1\UTber d Sat>lls4 1:1 lrM:lklle IniTial twje )

Lng expander cycle process employing integrated cryogenic purification

Abstract: A process and apparatus for the liquefaction of natural gas wherein raw feedstock is cryogenically fractionated to remove essentially all of the carbon dioxide and C5 hydrocarbons therefrom, and wherein the cryogenically purified feedstock is cooled and liquefied under pressure in a cryogenic heat exchanger The pressurized cold liquid from the heat exchanger is isenthalpically expanded to reduce the pressure and further cool the liquid while at the same time flashing a minor gas fraction Refrigeration for the liquefaction of the natural gas is supplied by a circulating refrigerant stream which is compressed and workexpanded to obtain the necessary cooling The minor flash gas portion of the liquefaction step is commingled with the circulating refrigerant stream so that the analysis of the refrigerant stream is always rich in the lighter portions of the liquefaction stream, thus aiding in maintaining refrigeration temperature differentials to drive the liquefaction step The work-expanded refrigerant portion undergoes a compression cycle and is work-expanded in a series of expansion turbines The expansion turbines furnish at least part of the power necessary to drive the compressor system in the refrigerant gas cycle

Method and system for separating and injecting gas in a wellbore

Abstract: A method and system for increasing oil production from an oil well producing a mixture of oil, water, gas, and/or solids through a wellbore penetrating an oil-bearing formation containing an oil-bearing zone and a selected injection zone, by separating from the mixture of oil, water, gas, and/or solids in the oil well at least a portion of the gas to produce a first separated gas and a first portion of an oil-enriched mixture; directing the first portion of the oil-enriched mixture through a bypass passageway having an outlet in fluid communication with a surface so that the first portion of the oil-enriched mixture bypasses a turbine in the oil well; driving the turbine with the first separated gas; driving a compressor in the oil well with the turbine; separating from the first separated gas in the oil well at least a portion of the gas to produce a second separated gas and a second portion of an oil-enriched mixture; compressing with the compressor the second separated gas to a pressure greater than a pressure in the selected injection zone to produce a compressed gas; injecting the compressed gas into the selected injection zone; and recovering at least a major portion of the first portion of the oil-enriched mixture and the second portion of the oil-enriched mixture.