In this study, we examine the dynamic simulation model of an air conditioning system consisting of heat source equipment, a heat exchanger, transport equipment, and a room. We estimate that the efficiency of the HVAC system can be increased by optimum operation control using the dynamic model. By simulating an air-conditioning system by using a coupled dynamic system model and CFD, we examine the effect of supply air temperature reset control and demand reduction control of HVAC system that utilizes thermal sensation in an unsteady state temperature environment. We obtain the following results for the effect of supply air temperature reset control and demand reduction control of the HVAC system. Supply air temperature reset control can cause a change of uniform temperature distribution. Supply air temperature reset control does not increase the power consumption. The power consumption of the unsteady state temperature environment is 4-7% lower than that of the constant state temperature environment. The demand reduction control is the control of shifting half of the change cycle of the indoor temperature set value at each other area. Demand reduction control reduces the maximum power consumption from 49.3 kW to 41.5 kW. Using this dynamic simulation, there is a possibility of considering the optimum control method in advance.

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During the March 2011 Great East Japan Earthquake, an unexpected earthquake and tsunami occurred and caused serious damage in many areas. Therefore, establishment of a social system that is resilient to disasters and environmentally conscious is an urgent need. This study investigated photovoltaic power generation for energy conservation and evaluated the independence from electric power during times of disaster in a middle-scale office building. It is verified by analyzing the regional contribution and utilization conditions whether the building can act as a disaster preparedness center. This paper investigated electric power consumption on each floor for all seasons and the effect of electric power reduction by photovoltaic power generation. As a result, the annual photovoltaic power generation was 55.7 MW・h and it effectively met 53.5 MW・h demanded by the air conditioning, lighting, and connection loads. Thus, the electrical power consumption was reduced 20.9% and clarified the basic electrical power consumption in middle-scale office building.

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