DEVELOPMENT OF HIGH-EFFICIENCY CO-GENERATION SYSTEM-HIGH EFFCIENCY GAS ENGINE FOR CO-GENERATION-

Co-generation systems, which can supply electricity and heat on site, are getting popularity and the market is expected to grow in the future, since it is finding favor for their economic merit, energy-saving features, and high environmental performance(Fig.1). In Japan, the capacity increases rapidly in the recent decade, reaching 800 MW (power generation) in the service area of Tokyo Gas. Pushed by growing awareness of environmental concerns, further increase is projected [1]. In Fig. 2, co-generation systems are classified on a power generation capacity basis. Gas turbines are often applied for large-scale classes over 1MW power generation capacity. O