2001 Fiscal Year Final Research Report Summary
Basic study for international comparison of building energy performance
| Project/Area Number |
11450218
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Kogakuin University |
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Principal Investigator |
UDAGAWA Mitsuhiro Kogakuin University, Department of Architecture, Professor, 工学部, 教授 (00133314)
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| Project Period (FY) |
1999 – 2001
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| Keywords | heat load in building / space heating / space cooling / simulation / weather data / house / office building / energy conservation |
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| Research Abstract |
The purpose of this study is to examine the energy requirement for space heating and cooling of Japan in comparison with European countries. Building heat loads were compared using the simulation results for the selected cities in Japan and Europe. The simulation was conducted for both model single family house and model office building using the hour by hour annual weather data for each city.
For the single family house, the simulation was carried out for 6 cities in Japan and 9 cities in Europe. The results showed that except for Helsinki where the maximum annual heating load was observed, the sums of heating and cooling load showed similar values, whereas the heating load is dominant in almost all the European cities.
For the office building, the simulation was carried out for Tokyo and five major cities in Europe. The results showed that cooling is dominant in room heat load even in the European cities. However, in the European cities the cooling effect of fresh air introduced for ventilation requirement contributes to reduce the cooling coil load of air handling unit.
Generally, the heating load in Europe is larger than that in Japan, however, the simulation results also show that thermal insulation of building is very effective to reduce the heating load. The heat load for cooling in Japan is much larger than that in Europe, in addition considerable amount of heating load is needed in Japan. While the simulation results for several European cities showed need for cooling, free cooling by ventilation air can be expected even in mid-summer in Europe. This results showed that the weather conditions of Japan is not favorite for reducing building energy requirement in comparison with Europe. The continuous studies for the ways of effective cooling energy reduction are especially important in Japan.
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