Original design of coal-bed gas/air control units for engine-generator sets

Abstract

Abstract

An original air/fuel automatic mixing control unit for a coal-bed gas internal combustion engine and its matching generator, which is different from the conventional one, is introduced. The basic design and calculation method of this novel unit are explained. On the basis of these, the units of the 12V190ZDT type engine-generator sets are calculated and designed, machined, and trial-produced. A year's service-test at the Centre of West Coal Mine Construction shows that the performances of these devices are stable and reliable, and that this method could solve many practical problems that the old unit could not; for instance, working with mid-low concentration of coal-seam gas. They also fill a gap in the field of design, calculation, development, and application of coal-bed gas devices; the economic and social benefits are also truly remarkable. Therefore, the design and calculation method obtained in this article are important for engineering applications. This paper also offers a theoretical basis for the design and development of coal-seam gas engines or sets of engine-generator.