Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System
In order to solve the problems of performance degradation in energy tower heat pump (ETHP) systems under low temperature conditions and soil heat imbalances in ground source heat pump (GSHP) systems in cold regions, a new coupled system of ETHP and GSHP systems (the ET–GSHP system) and its operating...
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MDPI AG
2023-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/18/6493 |
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| author | Yao Zhang Ronghua Wu Hao Yu Yujuan Yang Hao Zhan |
| author_facet | Yao Zhang Ronghua Wu Hao Yu Yujuan Yang Hao Zhan |
| author_sort | Yao Zhang |
| collection | DOAJ |
| description | In order to solve the problems of performance degradation in energy tower heat pump (ETHP) systems under low temperature conditions and soil heat imbalances in ground source heat pump (GSHP) systems in cold regions, a new coupled system of ETHP and GSHP systems (the ET–GSHP system) and its operating mode were proposed. The mathematical model of the system was constructed along with the system’s form and operation scheme. The COP (coefficient of performance) and total energy consumption of the coupled system were then simulated and studied under a number of common operating situations. The heating season is divided into four periods based on varying outdoor ambient temperatures: the first period operates in series mode and has an average outdoor temperature of 2.38 °C; the second period operates in parallel mode and has an average outdoor temperature of −8.56 °C; the third period uses soil source heat pumps to operate separately; and the fourth period operates in series mode and has an average outdoor temperature of −11.32 °C. Operation of the coupled system in four periods was simulated and analyzed, and the operational efficiency and energy saving of the system were analyzed using an actual commercial building in a cold region as an example. The results demonstrate that the ET–GSHP system’s overall energy consumption during the heating period is reduced by 4.34% when compared to the traditional GSHP systems; the system’s COP can maintain a high level throughout the heating period, with an average COP of 3.315; and the soil temperature at the conclusion of the heating period is 25 °C, which is 8.89 °C higher than that of the traditional GSHP system, providing a guarantee of summer heat return. The new ET–GSHP system significantly boosts the efficiency of the system’s operation, achieves effective coupling between various heat sources through multi-stage control, and offers improved energy-saving advantages. |
| first_indexed | 2024-03-10T22:50:18Z |
| format | Article |
| id | doaj.art-71f04beefec34ab893084cc0b36b1f34 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T22:50:18Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-71f04beefec34ab893084cc0b36b1f342023-11-19T10:25:57ZengMDPI AGEnergies1996-10732023-09-011618649310.3390/en16186493Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump SystemYao Zhang0Ronghua Wu1Hao Yu2Yujuan Yang3Hao Zhan4College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, ChinaCollege of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, ChinaQingdao KC Blue New Energy Co., Ltd., Qingdao 266300, ChinaCollege of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, ChinaQingdao KC Blue New Energy Co., Ltd., Qingdao 266300, ChinaIn order to solve the problems of performance degradation in energy tower heat pump (ETHP) systems under low temperature conditions and soil heat imbalances in ground source heat pump (GSHP) systems in cold regions, a new coupled system of ETHP and GSHP systems (the ET–GSHP system) and its operating mode were proposed. The mathematical model of the system was constructed along with the system’s form and operation scheme. The COP (coefficient of performance) and total energy consumption of the coupled system were then simulated and studied under a number of common operating situations. The heating season is divided into four periods based on varying outdoor ambient temperatures: the first period operates in series mode and has an average outdoor temperature of 2.38 °C; the second period operates in parallel mode and has an average outdoor temperature of −8.56 °C; the third period uses soil source heat pumps to operate separately; and the fourth period operates in series mode and has an average outdoor temperature of −11.32 °C. Operation of the coupled system in four periods was simulated and analyzed, and the operational efficiency and energy saving of the system were analyzed using an actual commercial building in a cold region as an example. The results demonstrate that the ET–GSHP system’s overall energy consumption during the heating period is reduced by 4.34% when compared to the traditional GSHP systems; the system’s COP can maintain a high level throughout the heating period, with an average COP of 3.315; and the soil temperature at the conclusion of the heating period is 25 °C, which is 8.89 °C higher than that of the traditional GSHP system, providing a guarantee of summer heat return. The new ET–GSHP system significantly boosts the efficiency of the system’s operation, achieves effective coupling between various heat sources through multi-stage control, and offers improved energy-saving advantages.https://www.mdpi.com/1996-1073/16/18/6493energy towerground source heat pumpcoupled systemenergy consumption analysis |
| spellingShingle | Yao Zhang Ronghua Wu Hao Yu Yujuan Yang Hao Zhan Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System Energies energy tower ground source heat pump coupled system energy consumption analysis |
| title | Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System |
| title_full | Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System |
| title_fullStr | Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System |
| title_full_unstemmed | Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System |
| title_short | Operation Mode and Energy Consumption Analysis of a New Energy Tower and Ground Source-Coupled Heat Pump System |
| title_sort | operation mode and energy consumption analysis of a new energy tower and ground source coupled heat pump system |
| topic | energy tower ground source heat pump coupled system energy consumption analysis |
| url | https://www.mdpi.com/1996-1073/16/18/6493 |
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