Analysis and evaluation of integrated energy system

Future energy supplies are uncertain, especially in view of environmental problems, fuel prices, and energy demand. In this paper two types of novel energy plants and a novel energy system have been proposed to cope with these conditions. The first type can utilize multiple kinds of fossil fuels and economically remove CO 2 and the second can produce multiple kinds of final energy to cope with fluctuations in the energy demand. Characteristics of a novel energy system (a Flexibly Integrated Energy System; FIES), which includes novel energy plants as described in the foregoing, have been investigated with a linear programming model. A reference system has also been represented which behaves similarly to the present energy system for comparison. Computed results have demonstrated that CO 2 emissions can be reduced more economically and efficiently than in the reference system if it is combined with CO 2 removal systems.