産業自家発電のエネルギー効率と二酸化炭素排出率に関する研究

概要

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This study was intended to find the energy and environmental efficiencies of industrial power generation systems in Japan, based on the data of the Yearbook of the Current Survey of Energy Consumption, by the Ministry of Economy, Trade and Industry (METD). Boiler-steam turbine systems account for the largest portion (73%) of the electricity produced on-site for factories' power needs, and combined heat and power (CHP) systems (16%) follow them. The power efficiencies of boiler-steam turbine power generation systems installed in 9 types of industry are in a range of 26-44% (total average : 37%), and their CO_2 emission rates are in a wider rage of 0.47-1.19 CO_2-kg/kWh (total average : 0.66 CO_2-kg/kWh). Then, the total efficiencies of CHP systems are in a range of 34-77% (total average : 62%), and their C02 emission rates are in a rage of 0.62-1.18 CO_2-kg/kWh (total average : 0.72 CO_2-kg/kWh). These results indicated that industrial boiler-steam turbine systems were not so efficient in power generation, and had slightly larger CO_2 emission rates than ones of the public power generation companies. And also, although industrial CHP systems were made sure to be useful measures for the climate changes as a whole, certain types of industry with low heat-demands hardly achieved the high performance.
兵庫県立大学の論文
2007-02-28