| Project/Area Number |
25420611
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Architectural environment/Equipment
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| Research Institution | Osaka City University |
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Principal Investigator |
Nabeshima Minako 大阪市立大学, 大学院工学研究科, 准教授 (90315979)
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| Co-Investigator(Kenkyū-buntansha) |
NISHIOKA Masatoshi 大阪市立大学, 大学院工学研究科, 教授 (40287470)
NAKAO Masaki 大阪市立大学, 複合先端研究機構, 特命教授 (60381977)
Farnham Craig 大阪市立大学, 大学院生活科学研究科, 講師 (60638245)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 浴室 / 排水熱回収 / 上水予熱 / 給湯用エネルギー消費量 / 実験 / 熱交換器 / 浴槽排水 |
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| Outline of Final Research Achievements |
With the goal of designing home bath water heat recovery systems to reduce the water heating load of hot water supply system experiments in characteristics of the heat exchanger for drainage heat recovery were performed. By using simulation model of the whole hot water supply system the heat recovery rate and primary energy consumption were estimated. As a result, it is shown that 11.36 MJ/day of primary energy consumption could be reduced.
Other experiments on hot-cold sensation and comfort for water temperatures of 14 to 45 degree C were performed on 30 test subjects. Hot-cold sensation on a 7-level vote scale strongly correlated with water temperature and skin temperature. At 28 degree C and above, there were no “cold” votes. A heat recovery system that stores warm water to save energy could also improve quality of life in winter if the set temperature is 28 degree C.
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