Cooling and heating load simulation of office building based on recent weather data: Changes in annual cooling and heating loads, peak loads during the year from 30 points throughout the nationwide during 1991 to 2018

Climate warming appears markedly in the Intergovernmental Panel on Climate Change (IPCC) and the Global Warming Prediction Information of the Meteorological Agency. The authors anticipate that the outdoor temperature will rise in the future. We attempted to verify the influence of the weather fluctuation of the cooling and heating loads with the recent rise in temperature. For this time, the calculation time interval was set to one minute interval from the conventional 1 hour interval so that detailed setting of air conditioning operation pattern and indoor lighting pattern can be made. We reported the recent changes of observation data of JMA at 30 points including Tokyo and annual heat load simulation, and summarized the secular change of instantaneous peak load and annual cooling / heating load. Following is the knowledge gained from this study. • The simulation was carried out this time due to the secular change of the annual cooling load. The annual cooling load increases at 28 points excluding Choshi and Hiroshima out of 30 points. The most increased points are Naha 1.783 (GJ / year) at Level 2 and 0.974 (GJ / Year) of Hakodate. Tokyo is 0.857 (GJ / year) and it is the fourth largest. • The number of points decrease due to aged deterioration of the annual heating load at 16 points increased at 14 points. The most reduced points are Sendai 1.109 (GJ / year) in Level 2, then Wakkanai 1.006 (GJ / Year). Tokyo increased by 0.041 (GJ / year). Eight divisions tend to increase. Year increase is small. • There are 23 points clearly increase by the secular change of the instantaneous cooling peak load and 3 points are decreased. The highest increase is at Hakodate 0.312 (kW / year) at Level 2, then Wakkanai at 0.232 (kW / year). Tokyo has increased by 0.143 (kW/year). • There are 8 points clearly decreased by the secular change of instantaneous heating peak load, and 11 points increased. At the level 2, Sendai 0.3902 (kW / yr), Aomori 0.1228 (kW / yr), and Tokyo increases by 0.028 (kW / yr). © 2019 Architectural Institute of Japan. All rights reserved.