Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling
As the improvement of district heating systems, the fine-tuning of operational equipment has become a promising direction. However, in the practical district heating systems, relying solely on manual control and the existing basic models, the dynamic hydraulic-thermal process is hard to cover. Conse...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-06-01
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| Series: | Energy and Built Environment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666123324000114 |
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| _version_ | 1825199459669114880 |
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| author | Xiaojie Lin Ning Zhang Zheng Luo Encheng Feng Wei Zhong |
| author_facet | Xiaojie Lin Ning Zhang Zheng Luo Encheng Feng Wei Zhong |
| author_sort | Xiaojie Lin |
| collection | DOAJ |
| description | As the improvement of district heating systems, the fine-tuning of operational equipment has become a promising direction. However, in the practical district heating systems, relying solely on manual control and the existing basic models, the dynamic hydraulic-thermal process is hard to cover. Consequently, the primary side control in the current district heating system mainly results in the over or under-supply of heating substations. This article constructs a dynamic hydraulic-thermal model and performs a balanced operation strategies optimization based on the hydraulic-thermal model. The linearization and iterative optimization process are adopted to simplify the hydraulic and thermal modeling for the single pipe, and the hydraulic and thermal calculation are conducted sequentially. For the primary side network in the various operation conditions, the dynamic hydraulic-thermal model is established. The heating supply imbalance of the primary side return temperatures among different heating substations is defined and optimized based on the dynamic hydraulic-thermal model and the particle swarm optimization algorithm. In the case analysis, the results of heating supply imbalance before and after optimization are 0.81 K and 0.47 K, respectively, with a 42.0 % reduction in heating imbalances after optimization. The proposed method could contribute to the fine-tuning of heating substations and the reduction of energy waste due to the imbalanced heating supply, which is significant for the operation strategies of district heating systems. |
| format | Article |
| id | doaj-art-e8cc841eec2b4034a93ccc6ec3f49697 |
| institution | Kabale University |
| issn | 2666-1233 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Energy and Built Environment |
| spelling | doaj-art-e8cc841eec2b4034a93ccc6ec3f496972025-02-08T05:01:13ZengKeAi Communications Co., Ltd.Energy and Built Environment2666-12332025-06-0163466483Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modelingXiaojie Lin0Ning Zhang1Zheng Luo2Encheng Feng3Wei Zhong4Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, Hangzhou 310013, Peoples R China; Shanghai Institute for Advanced Study, Zhejiang University, Shanghai 201203, Peoples R China; Jiaxing Research Institute, Zhejiang University, Jiaxing 314000, Peoples R ChinaPolytechnic Institute, Zhejiang University, Hangzhou 310015, Peoples R ChinaPolytechnic Institute, Zhejiang University, Hangzhou 310015, Peoples R ChinaPolytechnic Institute, Zhejiang University, Hangzhou 310015, Peoples R ChinaKey Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province, Zhejiang University, Hangzhou 310013, Peoples R China; Shanghai Institute for Advanced Study, Zhejiang University, Shanghai 201203, Peoples R China; Polytechnic Institute, Zhejiang University, Hangzhou 310015, Peoples R China; Jiaxing Research Institute, Zhejiang University, Jiaxing 314000, Peoples R China; Corresponding author.As the improvement of district heating systems, the fine-tuning of operational equipment has become a promising direction. However, in the practical district heating systems, relying solely on manual control and the existing basic models, the dynamic hydraulic-thermal process is hard to cover. Consequently, the primary side control in the current district heating system mainly results in the over or under-supply of heating substations. This article constructs a dynamic hydraulic-thermal model and performs a balanced operation strategies optimization based on the hydraulic-thermal model. The linearization and iterative optimization process are adopted to simplify the hydraulic and thermal modeling for the single pipe, and the hydraulic and thermal calculation are conducted sequentially. For the primary side network in the various operation conditions, the dynamic hydraulic-thermal model is established. The heating supply imbalance of the primary side return temperatures among different heating substations is defined and optimized based on the dynamic hydraulic-thermal model and the particle swarm optimization algorithm. In the case analysis, the results of heating supply imbalance before and after optimization are 0.81 K and 0.47 K, respectively, with a 42.0 % reduction in heating imbalances after optimization. The proposed method could contribute to the fine-tuning of heating substations and the reduction of energy waste due to the imbalanced heating supply, which is significant for the operation strategies of district heating systems.http://www.sciencedirect.com/science/article/pii/S2666123324000114District heating systemHydraulic-thermal modelingMechanical modelingSubstation operation optimizationBalanced heating |
| spellingShingle | Xiaojie Lin Ning Zhang Zheng Luo Encheng Feng Wei Zhong Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling Energy and Built Environment District heating system Hydraulic-thermal modeling Mechanical modeling Substation operation optimization Balanced heating |
| title | Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling |
| title_full | Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling |
| title_fullStr | Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling |
| title_full_unstemmed | Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling |
| title_short | Balanced operation strategies of district heating systems based on dynamic hydraulic-thermal modeling |
| title_sort | balanced operation strategies of district heating systems based on dynamic hydraulic thermal modeling |
| topic | District heating system Hydraulic-thermal modeling Mechanical modeling Substation operation optimization Balanced heating |
| url | http://www.sciencedirect.com/science/article/pii/S2666123324000114 |
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