AIR CONDITIONING SIMULATION OF HOUSING BY RECENT TOKYO 60 YEAR WEATHER DATA

Aging of heating and cooling load in the houses and energy saving by solar shading control

Abstract

 Using the heat load calculation program (LESCOM) developed by the authors, we conducted a thermal load simulation using the weather data of the recent Japan Meteorological Agency in Tokyo for 60 years, captured the annual heating and cooling load, the instantaneous peak load and predicted the heating and cooling load in the near future.

 In addition, we examined the correspondence in the solar shading control of the opening to decrease the cooling load and the following conclusions were obtained.

 (1) The annual cooling load in the detached house in Tokyo has been decreasing from 1960 to 1969, and has been on an increasing trend since 1972. The most recent building standard level estimated increase is 0.067GJ/year.

 (2) The annual heating load has decreased since 1960. It tends to be small. The estimated decrease in the most recent building standard level is 0.096GJ/year.

 (3) The instantaneous cooling load in Tokyo is on a declining trend from 1960 to 1969, It has been on an increasing trend since 1972.The estimate of the most recent is 0.227kW/year.

 (4) The annual cooling load of the window is decreasing from 1960 to 1969, and has been on an increasing trend since 1972. The estimated increase in the most recent is 0.014kW/year.

 (5) The annual cooling load of the outside wall incorporation is decreasing from 1960 to 1969, and has been increasing since 1972. Similarly the estimated increase is 0.005kW/year.

 (6) The instantaneous heating load in Tokyo has been decreasing since 1960 to the present day. The estimated decrease in the most recent is 0.023kW/year.

 (7) The annual heating load of the outside wall has been decreasing since 1960 to the present day. The estimated decrease in the most recent is 0.023kW/year.

 (8) As a method for the cooling load to increase the housing, the thermal load minimum control is the most effective in the blind control. Compared to +45-degree fixed blind in 2019, the minimum thermal load control can reduce the cooling load per year of 0.017GJ.

 (9) The minimum thermal load control by the opening and closing control of the curtain can reduce the cooling load per year by 0.031GJ compared to the fixed lace curtain in 2019.