Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method
Engines waste a major part of their fuel energy in the jacket water and exhaust gas. Transcritical Rankine cycles are a promising technology to recover the waste heat efficiently. The working fluid selection seems to be a key factor that determines the system performances. However, most of the studi...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/7/1830 |
| _version_ | 1797570952151695360 |
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| author | Zhijian Wang Hua Tian Lingfeng Shi Gequn Shu Xianghua Kong Ligeng Li |
| author_facet | Zhijian Wang Hua Tian Lingfeng Shi Gequn Shu Xianghua Kong Ligeng Li |
| author_sort | Zhijian Wang |
| collection | DOAJ |
| description | Engines waste a major part of their fuel energy in the jacket water and exhaust gas. Transcritical Rankine cycles are a promising technology to recover the waste heat efficiently. The working fluid selection seems to be a key factor that determines the system performances. However, most of the studies are mainly devoted to compare their thermodynamic performances of various fluids and to decide what kind of properties the best-working fluid shows. In this work, an active working fluid selection instruction is proposed to deal with the temperature match between the bottoming system and cold source. The characters of ideal working fluids are summarized firstly when the temperature match method of a pinch analysis is combined. Various selected fluids are compared in thermodynamic and economic performances to verify the fluid selection instruction. It is found that when the ratio of the average specific heat in the heat transfer zone of exhaust gas to the average specific heat in the heat transfer zone of jacket water becomes higher, the irreversibility loss between the working fluid and cold source is improved. The ethanol shows the highest net power output of 25.52 kW and lowest electricity production cost of $1.97/(kWh) among candidate working fluids. |
| first_indexed | 2024-03-10T20:33:40Z |
| format | Article |
| id | doaj.art-26e51373f57340f78c78812033b1054e |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:33:40Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-26e51373f57340f78c78812033b1054e2023-11-19T21:12:28ZengMDPI AGEnergies1996-10732020-04-01137183010.3390/en13071830Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match MethodZhijian Wang0Hua Tian1Lingfeng Shi2Gequn Shu3Xianghua Kong4Ligeng Li5State Key Laboratory of Engine Reliability, Weichai Power Co., Ltd., Weifang 261001, ChinaState Key Laboratory of Engines, Tianjin University, Tianjin 300072, ChinaDepartment of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, ChinaState Key Laboratory of Engines, Tianjin University, Tianjin 300072, ChinaState Key Laboratory of Engine Reliability, Weichai Power Co., Ltd., Weifang 261001, ChinaState Key Laboratory of Engines, Tianjin University, Tianjin 300072, ChinaEngines waste a major part of their fuel energy in the jacket water and exhaust gas. Transcritical Rankine cycles are a promising technology to recover the waste heat efficiently. The working fluid selection seems to be a key factor that determines the system performances. However, most of the studies are mainly devoted to compare their thermodynamic performances of various fluids and to decide what kind of properties the best-working fluid shows. In this work, an active working fluid selection instruction is proposed to deal with the temperature match between the bottoming system and cold source. The characters of ideal working fluids are summarized firstly when the temperature match method of a pinch analysis is combined. Various selected fluids are compared in thermodynamic and economic performances to verify the fluid selection instruction. It is found that when the ratio of the average specific heat in the heat transfer zone of exhaust gas to the average specific heat in the heat transfer zone of jacket water becomes higher, the irreversibility loss between the working fluid and cold source is improved. The ethanol shows the highest net power output of 25.52 kW and lowest electricity production cost of $1.97/(kWh) among candidate working fluids.https://www.mdpi.com/1996-1073/13/7/1830fluid selectionRankine cyclewaste heat recoverytemperature matchpinch analysisengines |
| spellingShingle | Zhijian Wang Hua Tian Lingfeng Shi Gequn Shu Xianghua Kong Ligeng Li Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method Energies fluid selection Rankine cycle waste heat recovery temperature match pinch analysis engines |
| title | Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method |
| title_full | Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method |
| title_fullStr | Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method |
| title_full_unstemmed | Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method |
| title_short | Fluid Selection of Transcritical Rankine Cycle for Engine Waste Heat Recovery Based on Temperature Match Method |
| title_sort | fluid selection of transcritical rankine cycle for engine waste heat recovery based on temperature match method |
| topic | fluid selection Rankine cycle waste heat recovery temperature match pinch analysis engines |
| url | https://www.mdpi.com/1996-1073/13/7/1830 |
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