抄録
In this paper, the economical and energy saving advantages of the cogeneration system, which consists of a micro gas turbine (μGT)-solid oxide fuel cell (SOFC) hybrid system, waste heat recovery devices and air-conditioning equipments, are investigated. The numerical simulation code to find out the optimal operation strategy of cogeneration system by using the linear programming technique has been developed. Assuming the installation of the cogeneration system at buildings in civilian sector of Japan, the energy demand data of a typical hotel, office building and apartment house, of which floor area are 7000m^2, used in the calculation. The climate condition data in Tokyo are also used to decide the performance of the air-conditioning machines. The power output of the hybrid system are set at 300kW for a hotel and office and 50kW for a residential building, respectively. Applying the annual grid power and town gas cost as the objective function, it is found that optimal operation leads the advantageous effect of the cost reduction against the traditional energy supply method to over 50%, and the fuel consumption reduction is simultaneously achieved. In the case of the objective function of energy saving, fuel consumption is decreased to be under 70% as the conventional system and the almost 50% cost reduction can be expected at the same time.
