1995 Fiscal Year Final Research Report Summary
Development of New Social System Utilizing Natural Energy
| Project/Area Number |
06680411
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
社会システム工学
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| Research Institution | Kanazawa Institute of Technology |
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Principal Investigator |
MURATA Hideto Kanazawa Institute of Technology, Faculty of Engg., Professor, 工学部, 教授 (10031080)
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| Co-Investigator(Kenkyū-buntansha) |
WAKABAYASHI Hiroaki Kanazawa Institute of Technology, Faculty of Engg., Professor, 工学部, 教授 (90011056)
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| Project Period (FY) |
1994 – 1995
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| Keywords | natural energy / new social system / snow melting system / cooling system / river water / sewage |
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| Research Abstract |
1. To investigate the feasibility of cooling at summer by cold river water, a case study was made concerning Nagasaka open channel, which flows down irrigating the southern district of Kanazawa. (1) The water temperature and flow were measured twice during 3 days at 5 points scattered in the distance of 3 km. It was disclosed that the water temperature at the upper stream was kept at 20<plus-minus>1ﾟC, whereas the atmospheric temperature fluctuated around 28ﾟC.A mathematical model based on heat transfer theory was constructed to explain the measured temperature of water. (2) As a case study, a specificplace was chosen to concretely estimate costs for cooling. A fan-coil unit cooler (FCU) was assumed in present study. The pumped-up water in radiator coil was cool-ed with an electrical fan. It was found that cooling by FCU costs 15 yen less per an hour than by an ordinary electrical coole
2. The heat equivalent to 8ﾟC water at Uchikawa dam lake in winter was extracted with a heat pipe and used for snow melting for 3 months. The occurrence of snow melting was verified through mathematical analysis.
3. Temperatures of sewage and treated water were measured in winter of 1996 at a sewage control center. The difference between the water and atmospheric temperatures in winter was 10ﾟC, which value is sufficient for snow melting.
4. To evaluate the cooling effect of sprinkling grounds with water, a baseball ground was sprinkled with the treated sewage water in summer of 1995. It was found that the drop in atmospheric temperature was about 4ﾟC.
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