Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange
Natural draft hybrid cooling (NDHC) for thermal power generating units is proposed to achieve a balance of energy and water consumption for arid areas. This study examines the two main design forms of hybrid cooling with airside in serial and parallel heat exchange based on the same tower shell and...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/15/17/6478 |
| _version_ | 1797495473271996416 |
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| author | Qian Huang Yifan Zhi Rongyong Zhang Huimin Wei Lei Xu |
| author_facet | Qian Huang Yifan Zhi Rongyong Zhang Huimin Wei Lei Xu |
| author_sort | Qian Huang |
| collection | DOAJ |
| description | Natural draft hybrid cooling (NDHC) for thermal power generating units is proposed to achieve a balance of energy and water consumption for arid areas. This study examines the two main design forms of hybrid cooling with airside in serial and parallel heat exchange based on the same tower shell and heat transfer areas. Taking full consideration of the thermal cycle of the power generating unit, simplified simulation models for different cooling systems are established to show the influences of ambient conditions and marketing factors. Results show that both the hybrid cooling designs have a better cooling efficiency than either dry cooling or wet cooling. Expanded inlet areas of hybrid cooling in the parallel heat exchange design bring high heat transfer performance. As for the serial design, the higher temperature of the air at the outlet of the dry section maintains a larger airside mass flow rate, obtaining a high-efficient cooling system. The hybrid cooling in the serial design type relies more on the heat transfer performance of the wet section and is more sensible to ambient humidity, while the performance of hybrid cooling in the parallel design mainly depends on the dry section and is more easily affected by ambient temperature. Considering the unit cost variations of coal and water treatment, hybrid cooling in the parallel design has a wider range of applications compared with the serial design. With the growth in coal cost, there exist more benefits with the serial design. |
| first_indexed | 2024-03-10T01:50:06Z |
| format | Article |
| id | doaj.art-771fbcbe4ab2488c8ce9da2d5b57c2b8 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T01:50:06Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-771fbcbe4ab2488c8ce9da2d5b57c2b82023-11-23T13:06:51ZengMDPI AGEnergies1996-10732022-09-011517647810.3390/en15176478Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat ExchangeQian Huang0Yifan Zhi1Rongyong Zhang2Huimin Wei3Lei Xu4China Nuclear Power Engineering Co., Ltd., Beijing 100840, ChinaChina Nuclear Power Engineering Co., Ltd., Beijing 100840, ChinaChina Nuclear Power Engineering Co., Ltd., Beijing 100840, ChinaKey Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, ChinaKey Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, ChinaNatural draft hybrid cooling (NDHC) for thermal power generating units is proposed to achieve a balance of energy and water consumption for arid areas. This study examines the two main design forms of hybrid cooling with airside in serial and parallel heat exchange based on the same tower shell and heat transfer areas. Taking full consideration of the thermal cycle of the power generating unit, simplified simulation models for different cooling systems are established to show the influences of ambient conditions and marketing factors. Results show that both the hybrid cooling designs have a better cooling efficiency than either dry cooling or wet cooling. Expanded inlet areas of hybrid cooling in the parallel heat exchange design bring high heat transfer performance. As for the serial design, the higher temperature of the air at the outlet of the dry section maintains a larger airside mass flow rate, obtaining a high-efficient cooling system. The hybrid cooling in the serial design type relies more on the heat transfer performance of the wet section and is more sensible to ambient humidity, while the performance of hybrid cooling in the parallel design mainly depends on the dry section and is more easily affected by ambient temperature. Considering the unit cost variations of coal and water treatment, hybrid cooling in the parallel design has a wider range of applications compared with the serial design. With the growth in coal cost, there exist more benefits with the serial design.https://www.mdpi.com/1996-1073/15/17/6478natural draft hybrid coolingparallel/serial heat exchangewater/energy nexusannual performance |
| spellingShingle | Qian Huang Yifan Zhi Rongyong Zhang Huimin Wei Lei Xu Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange Energies natural draft hybrid cooling parallel/serial heat exchange water/energy nexus annual performance |
| title | Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange |
| title_full | Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange |
| title_fullStr | Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange |
| title_full_unstemmed | Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange |
| title_short | Comprehensive Comparison of Hybrid Cooling of Thermal Power Generation with Airside Serial and Parallel Heat Exchange |
| title_sort | comprehensive comparison of hybrid cooling of thermal power generation with airside serial and parallel heat exchange |
| topic | natural draft hybrid cooling parallel/serial heat exchange water/energy nexus annual performance |
| url | https://www.mdpi.com/1996-1073/15/17/6478 |
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