Fuel gas compressors installed in cogeneration systems must be highly reliable and efficient machines, like the other main components, such as gas turbines, gas engines, etc. In the range of gas flow rate and pressure conditions generally required for such systems, the oil-injected screw compressor is often the most suitable compressor type for these requirements. Advantages of oil injected screw compressors are: improved compression efficiency; low discharge gas temperature; high reliability; simple mechanical construction; which all result from injection of lubricant into the compressor. Injected lubricant is discharged together with compressed gas on the high-pressure side but the oil is separated by a fine oil separation system down to a level that causes no problems for the downstream combustion equipment. The oil-injected screw compressor is equipped with an integral stepless capacity control by means of a slide valve, which makes part-load operation possible with reduced power consumption and improves overall system efficiency. As cogeneration systems, which are energy efficient and environmentally sound, are now increasing in number, so oil-injected screw compressors are expected to be used more widely.

Issue Section:
Gas Turbines: Cogeneration
Topics:
Compressors, Design, Gaseous fuels, Screws, Cogeneration systems, Lubricants, Combustion, Compression, Construction, Energy consumption, Gas engines, Gas flow, Gas turbines, High pressure (Physics), Machinery, Pressure, Reliability, Separation (Technology), Stress, System efficiency, Temperature, Valves
1.
Arbon, I. M., 1993, “An Introductory Guide to the Design and Application of Rotary Screw Compressors in the Oil & Gas Process Industry,” MEP, United Kingdom.
2.
Billet, C. T., and Fielding, R. M., 1984, “A Quantitative Method to Determine Oil Carryover From High Efficient Coalescing Filters,” I.C.E.C., Perdue Univ., W. Lafayette, IN.
3.
Dreksler, M. Y., and Scheel, L. F., 1976, “A Technique for Rotating Rotary Compressors,” ASME Conference, Mexico City, Mexico.
4.
Gauhar, M. A., 1988, “An Introduction to the Oil-Flooded Screw Compressors,” Technical paper of MYCOM CORPORATION, Torrance, CA.
5.
Kasahara
K.
,
1975
, “
Screw Compressor
,”
Journal of Refrigeration
, Japan, Vol.
XX
, pp.
XX–OO
XX–OO
.
6.
Kohnosu, M., and Watanabe, A., 1983, “A Cogeneration System for High-Rise Building Using Dual Fuel Gas Turbine,” GTSJ paper. I.G.T.C. Tokyo, Japan.
7.
Tolfa, J. C., 1989, “Synthetic Lubricants Suitable for Use in Process and Hydrocarbon Gas Compressors,” presented at the STLE National Meeting, Atlanta, GA.
8.
Yamamoto
S.
,
1978
, “
Screw Type Compressors
,”
Journal of Refrigeration and Air-Conditioning Technology
, Japan, Vol.
XX
, pp.
XX–OO
XX–OO
.
This content is only available via PDF.
Copyright © 1995
 by The American Society of Mechanical Engineers
You do not currently have access to this content.