IMPROVEMENT IN THE EFFICIENCY OF DISTRICT HEATING AND COOLING (DHC) WITH A REGIONAL STEAM NETWORK OF CHPs AND MUNICIPAL INCINERATION PLANTS IN TOKYO

Fujisaki, W.; Ichikawa, T.; Hori, E.; Cao, M.; Ojima, T.
District Hating and Cooling, Integrated energy use, Steam network, CHP, CO2
Year:
2007
Bibliographic info:
The 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings IAQVEC 2007, Oct. 28 - 31 2007, Sendai, Japan

District Heating and Cooling system (DHC) is an efficient energy system as they can supply chilled andheating water/steam effectively by integrating heating and cooling demand of neighboring buildings.However, there is possibility for further improvement of energy efficiency by integrated operation ofadjacent DHC and utilizing waste heat from municipal incinerators and CHPs. In this study, the effect ofsuch flexible use of heat and electricity in integrated DHC systems is examined. The main object is toraise total thermal efficiency and reduce CO2 emission. The results of the study showed significantreduction of primary energy consumption and CO2 emission by 12 to 36%. In addition, various sidecontributions to urban environment and city function were suggested such as mitigation of urban heatisland, improvement of business continuity plan (BCP), electric-load leveling and improvement of citylandscape.

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