Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander
To achieve energy saving and emission reduction for vehicle diesel engines, the organic Rankine cycle (ORC) was employed to recover waste heat from vehicle diesel engines, R245fa was used as ORC working fluid, and the resulting vehicle diesel engine-ORC combined system was presented. The variation l...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2014-05-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/7/5/3400 |
| _version_ | 1798005631433572352 |
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| author | Kai Yang Hongguang Zhang Songsong Song Jian Zhang Yuting Wu Yeqiang Zhang Hongjin Wang Ying Chang Chen Bei |
| author_facet | Kai Yang Hongguang Zhang Songsong Song Jian Zhang Yuting Wu Yeqiang Zhang Hongjin Wang Ying Chang Chen Bei |
| author_sort | Kai Yang |
| collection | DOAJ |
| description | To achieve energy saving and emission reduction for vehicle diesel engines, the organic Rankine cycle (ORC) was employed to recover waste heat from vehicle diesel engines, R245fa was used as ORC working fluid, and the resulting vehicle diesel engine-ORC combined system was presented. The variation law of engine exhaust energy rate under various operating conditions was obtained, and the running performances of the screw expander were introduced. Based on thermodynamic models and theoretical calculations, the running performance of the vehicle diesel engine-ORC combined system was analyzed under various engine operating condition scenarios. Four evaluation indexes were defined: engine thermal efficiency increasing ratio (ETEIR), waste heat recovery efficiency (WHRE), brake specific fuel consumption (BSFC) of the combined system, and improvement ratio of BSFC (IRBSFC). Results showed that when the diesel engine speed is 2200 r/min and diesel engine torque is 1200 N·m, the power output of the combined system reaches its maximum of approximately 308.6 kW, which is 28.6 kW higher than that of the diesel engine. ETEIR, WHRE, and IRBSFC all reach their maxima at 10.25%, 9.90%, and 9.30%, respectively. Compared with that of the diesel engine, the BSFC of the combined system is obviously improved under various engine operating conditions. |
| first_indexed | 2024-04-11T12:42:31Z |
| format | Article |
| id | doaj.art-cfa853203a664f1382a2c068d943f9c3 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T12:42:31Z |
| publishDate | 2014-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-cfa853203a664f1382a2c068d943f9c32022-12-22T04:23:27ZengMDPI AGEnergies1996-10732014-05-01753400341910.3390/en7053400en7053400Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw ExpanderKai Yang0Hongguang Zhang1Songsong Song2Jian Zhang3Yuting Wu4Yeqiang Zhang5Hongjin Wang6Ying Chang7Chen Bei8College of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaCollege of Environmental and Energy Engineering, Beijing University of Technology, Pingleyuan No.100, Beijing 100124, ChinaTo achieve energy saving and emission reduction for vehicle diesel engines, the organic Rankine cycle (ORC) was employed to recover waste heat from vehicle diesel engines, R245fa was used as ORC working fluid, and the resulting vehicle diesel engine-ORC combined system was presented. The variation law of engine exhaust energy rate under various operating conditions was obtained, and the running performances of the screw expander were introduced. Based on thermodynamic models and theoretical calculations, the running performance of the vehicle diesel engine-ORC combined system was analyzed under various engine operating condition scenarios. Four evaluation indexes were defined: engine thermal efficiency increasing ratio (ETEIR), waste heat recovery efficiency (WHRE), brake specific fuel consumption (BSFC) of the combined system, and improvement ratio of BSFC (IRBSFC). Results showed that when the diesel engine speed is 2200 r/min and diesel engine torque is 1200 N·m, the power output of the combined system reaches its maximum of approximately 308.6 kW, which is 28.6 kW higher than that of the diesel engine. ETEIR, WHRE, and IRBSFC all reach their maxima at 10.25%, 9.90%, and 9.30%, respectively. Compared with that of the diesel engine, the BSFC of the combined system is obviously improved under various engine operating conditions.http://www.mdpi.com/1996-1073/7/5/3400waste heat recoveryvehicle diesel engineorganic Rankine cyclescrew expandervarious operating conditions |
| spellingShingle | Kai Yang Hongguang Zhang Songsong Song Jian Zhang Yuting Wu Yeqiang Zhang Hongjin Wang Ying Chang Chen Bei Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander Energies waste heat recovery vehicle diesel engine organic Rankine cycle screw expander various operating conditions |
| title | Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander |
| title_full | Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander |
| title_fullStr | Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander |
| title_full_unstemmed | Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander |
| title_short | Performance Analysis of the Vehicle Diesel Engine-ORC Combined System Based on a Screw Expander |
| title_sort | performance analysis of the vehicle diesel engine orc combined system based on a screw expander |
| topic | waste heat recovery vehicle diesel engine organic Rankine cycle screw expander various operating conditions |
| url | http://www.mdpi.com/1996-1073/7/5/3400 |
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