A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure
In this study, a four stroke four cylinder direct injection CI engine was run using three different injection pressures. In all measurements, the fuel quantity per cycle, the pre injection and main injection timing, the boost pressure and the engine speed were kept constant. The motor tests were per...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-01-01
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| Series: | Entropy |
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| Online Access: | http://www.mdpi.com/1099-4300/17/1/244 |
| _version_ | 1817990791515078656 |
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| author | Muammer Özkan |
| author_facet | Muammer Özkan |
| author_sort | Muammer Özkan |
| collection | DOAJ |
| description | In this study, a four stroke four cylinder direct injection CI engine was run using three different injection pressures. In all measurements, the fuel quantity per cycle, the pre injection and main injection timing, the boost pressure and the engine speed were kept constant. The motor tests were performed under 130, 140 and 150 MPa rail pressure. During the theoretical part of the study, combustion, emission, energy and exergy analysis were made using the test results. An increase in the injection pressure increases combustion efficiency. The results show that combustion efficiency is not enough by itself, because the increase in the power need of the injection pump, decreases the thermal efficiency. The increase in the combustion temperature, increases the cooling loss and decreases the exergetic efficiency. In addition, the NOx emissions increased by 12% and soot emissions decreased 44% via increasing injection pressure by 17%. The thermal and exergetic efficiencies are found inversely proportional with injection pressure. Exergy destruction is found independent of the injection pressure and its value is obtained as ~6%. |
| first_indexed | 2024-04-14T01:04:45Z |
| format | Article |
| id | doaj.art-c2bb0bb44b1a4860a3f771ccb0d7aafc |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-14T01:04:45Z |
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| series | Entropy |
| spelling | doaj.art-c2bb0bb44b1a4860a3f771ccb0d7aafc2022-12-22T02:21:18ZengMDPI AGEntropy1099-43002015-01-0117124426310.3390/e17010244e17010244A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection PressureMuammer Özkan0IC Engines Laboratory, Department of Mechanical Engineering, Yıldız Technical University, Istanbul 34349, TurkeyIn this study, a four stroke four cylinder direct injection CI engine was run using three different injection pressures. In all measurements, the fuel quantity per cycle, the pre injection and main injection timing, the boost pressure and the engine speed were kept constant. The motor tests were performed under 130, 140 and 150 MPa rail pressure. During the theoretical part of the study, combustion, emission, energy and exergy analysis were made using the test results. An increase in the injection pressure increases combustion efficiency. The results show that combustion efficiency is not enough by itself, because the increase in the power need of the injection pump, decreases the thermal efficiency. The increase in the combustion temperature, increases the cooling loss and decreases the exergetic efficiency. In addition, the NOx emissions increased by 12% and soot emissions decreased 44% via increasing injection pressure by 17%. The thermal and exergetic efficiencies are found inversely proportional with injection pressure. Exergy destruction is found independent of the injection pressure and its value is obtained as ~6%.http://www.mdpi.com/1099-4300/17/1/244second-lawinternal combustion enginesmultiply injectionexergyenergyexhaust emissions |
| spellingShingle | Muammer Özkan A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure Entropy second-law internal combustion engines multiply injection exergy energy exhaust emissions |
| title | A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure |
| title_full | A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure |
| title_fullStr | A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure |
| title_full_unstemmed | A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure |
| title_short | A Comparative Study on Energy and Exergy Analyses of a CI Engine Performed with Different Multiple Injection Strategies at Part Load: Effect of Injection Pressure |
| title_sort | comparative study on energy and exergy analyses of a ci engine performed with different multiple injection strategies at part load effect of injection pressure |
| topic | second-law internal combustion engines multiply injection exergy energy exhaust emissions |
| url | http://www.mdpi.com/1099-4300/17/1/244 |
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