2019 Volume 84 Issue 759 Pages 495-505
According to the Meteorological Agency 'Climate Change Monitoring Report 2016', the average annual temperature in Japan has risen.
The urban area reports that it is improving the heat island.
The authors focused on the influence of recent weather changes on cooling and heating load.
The heating and cooling loads are calculated from weather change and building condition, internal heat generation, air conditioning driving situation.
The authors created data from JMA observation data of 30 locations nationwide from 1991 to 2017 (27 years) recently for heat load calculation.
Using these data, the cooling and heating loads of the detached house were strictly calculated using the thermal load calculation program (LESCOM-mint).
Summary
① Annual cooling loads increase both in cities and elsewhere.
The biggest point of increase is Fukuoka's year 0.838 GJ, followed by Nagasaki, Ishigaki-jima, Cyoshi, Tokyo.
② Annual heating loads are decreasing due to secular change, but there are some points where it is increasing.
This is because the outside air temperature that greatly affects the heating load does not necessarily increase due to secular change.
The major reduction point is Sendai's year 0.102 GJ, followed by Wakkanai, Abashiri, Kagoshima, Morioka.
The biggest point of increase is 0.0316 GJ in Nagasaki year, then Sapporo, Tokyo, Niigata and Nagoya.
The rate of increase is small compared to the rate of decrease.
③ The instantaneous cooling loads increase at 29 locations, excluding one point Kofu.
The biggest point of increase is Hakodate year 0.0338 kW, followed by Morioka, Ishigaki-jima, Aomori, Akita in order.
Kofu is decreasing, but it is very small with a decrease of 0.0061 kW a year.
④ The instantaneous heating loads are increasing and decreasing over time.
The increase is due to the fact that the fluctuation of the outside air temperature in the extremely cold season in winter is different from year to year, and it does not rise monotonically with aging.
The major point of decrease is 0.0663 kW of Ishigaki-jima, then Miyakojima, Aomori, Naze, Abashiri in order.
The biggest point of increase is Nagasaki's year 0.0632 kW, followed by Hiroshima, Matsuyama, Kumamoto and Osaka.
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