2019 Fiscal Year Annual Research Report
Electrical, thermal and structural performance of new membrane building integrated PVs
| Project/Area Number |
18F18345
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| Research Institution | The University of Tokyo |
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Principal Investigator |
川口 健一 東京大学, 生産技術研究所, 教授 (40234041)
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| Co-Investigator(Kenkyū-buntansha) |
HU JIANHUI 東京大学, 生産技術研究所, 外国人特別研究員
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| Project Period (FY) |
2018-10-12 – 2021-03-31
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| Keywords | Public / Residual building |
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| Outline of Annual Research Achievements |
1. Building energy consumption of comfort management residential buildings was investigated in terms of air conditioning, radiant floor and retractable membrane ceiling. Effectiveness of membrane ceilings has been validated and quantified (energy reduction of 22% for air conditioning with/without membrane ceiling). The research results are presented in Annual Convention 2019 of Architectural Institute of Japan and submitted to Applied Energy (IF 8.426).
2. Long-term building performance of large-span swimming stadiums with retractable membrane ceilings has been investigated. The energy performance is analyzed with statistical methods to obtain suitable values for designing and retrofitting similar stadiums. The research results are published in Energy and Buildings (IF 4.799, 207, 109363).
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
After achieving building performance of large-span stadiums with non-structural membrane ceilings, structural behavior of PV-ETFE buildings under complex external conditions is the following research focus. The theoretical analysis of heat-fluid-structure interaction and the calculation of structural behavior are the core research in the JSPS proposal.
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| Strategy for Future Research Activity |
Reasonable structural behavior of novel PV-ETFE buildings needs to consider dynamic temperature distribution and thermal-mechanical properties. Moreover, time-temperature and time-stress superpositions are utilized to reduce parameters. The addition of temperature-stress function can obtain a unified theoretical function. Considering this function and constitutive equation, heat-fluid-structure interaction can be addressed on the basis of virtual work principle and ideal gas equation. A new method is presented to reveal structural behavior for promoting utilizations of PV-ETFE cushion structures.
This proposal intends to build a multidisciplinary branch for solving research issues (energy, building and structure) and to understand sustainable buildings in Japan and China.
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