2007 Fiscal Year Final Research Report Summary
Development of a Novel Home Cogeneration System using a Polymer Electrolyte Fuel Cell which Enabled Air Conditioning by Its Low-Temperature Waste Heat
| Project/Area Number |
18560811
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | Osaka City University |
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Principal Investigator |
NISHIMURA Nobuya Osaka City University, Faculty of Engineering, Professor (30189310)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Fuel Cell / Energy Saving / Co-generation / Environmental Technology / Air-conditioning / Refrigerator / Absorption machine |
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| Research Abstract |
Micro-scale distributed power generation system, which means a micro-cogeneration system in almost cases, has been paid a great attention from a standpoint of saving fossil fuels' consumption and preventing global warming. Especially, polymer electrolyte fuel cell (PEFC) is considered the most promising power generation system for small scale commercial use and residential use.
In the PEFC cogeneration system, small amount of waste heat at low temperature from a cell stack is almost used to produce hot water. Therefore, in the study, the head investigator proposed a new heat utilization method of the waste heat for air conditioning. In the proposed home cogeneration system, absorption refrigerator has been introduced in order to produce chilled water. So, a new low concentration solution cycle was contrived and its COP was estimated, and the COP is used in the numerical simulation for developing both a high performance and compact absorber.
Thermal performances of the proposed system have been analyzed by a computer simulation which was developed for the prediction both of power generation characteristics of PEFC and absorption refrigerator's behavior. Performances and efficiencies of the total system were predicted quantitatively and compared to that of actual proof test machines. Furthermore, on basis of the past experimental results, the performance prediction of the novel vertical plate type absorbers have been carried out in order to find new techniques that could realize a compact and more efficient absorber for Low temperature heat source. From those theoretical results, a prototype small absorption testing machine has been constructed, and the performances of the machine are checked now.
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