The effect of unheated users on residential building in heating performance
•A high-accuracy thermo-hydraulic couplings model of a multi-family residential heating system.•A new index was defined to evaluate the effect of unheated users in the building scale.•Effects of the unheated user on adjacent heating user and the whole heating building were investigated.•All possible...
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Published in | Energy and buildings Vol. 253; p. 111519 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
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Lausanne
Elsevier B.V
15.12.2021
Elsevier BV |
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Abstract | •A high-accuracy thermo-hydraulic couplings model of a multi-family residential heating system.•A new index was defined to evaluate the effect of unheated users in the building scale.•Effects of the unheated user on adjacent heating user and the whole heating building were investigated.•All possible relative locations and different indoor temperature settings were investigated.
In the Chinese district heating network, unheated users generally exist in multi-family residential buildings, which adversely affects the heating performance of the whole building and its surrounding users. These effects are directly related to the fairness of heat metering and the rationality of system adjustment. Aiming to study this effect, a model of a multi-family residential heating system that considering the thermo-hydraulic coupling is developed and calibrated. Then, the possible adjacencies between unheated and heating users are described by eight different building areas and three relative user locations. Furthermore, based on the model, this paper analyses the effect of the unheated user on the heating users in different adjacencies and adjustment conditions. Lastly, the influence of unheated users in different areas is studied under different adjustment conditions. The result shows that upside unheated user has the most significant effect on heating users. Under the original condition, the building system is most affected by the unheated user on the ground floor, with a relative heat consumption rate (RHCR) greater than 45%. Under the adjustment condition, the RHCR of the system increases significant, but the difference between unheated users is noticeably reduced; the RHCR is 50–70%. |
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AbstractList | •A high-accuracy thermo-hydraulic couplings model of a multi-family residential heating system.•A new index was defined to evaluate the effect of unheated users in the building scale.•Effects of the unheated user on adjacent heating user and the whole heating building were investigated.•All possible relative locations and different indoor temperature settings were investigated.
In the Chinese district heating network, unheated users generally exist in multi-family residential buildings, which adversely affects the heating performance of the whole building and its surrounding users. These effects are directly related to the fairness of heat metering and the rationality of system adjustment. Aiming to study this effect, a model of a multi-family residential heating system that considering the thermo-hydraulic coupling is developed and calibrated. Then, the possible adjacencies between unheated and heating users are described by eight different building areas and three relative user locations. Furthermore, based on the model, this paper analyses the effect of the unheated user on the heating users in different adjacencies and adjustment conditions. Lastly, the influence of unheated users in different areas is studied under different adjustment conditions. The result shows that upside unheated user has the most significant effect on heating users. Under the original condition, the building system is most affected by the unheated user on the ground floor, with a relative heat consumption rate (RHCR) greater than 45%. Under the adjustment condition, the RHCR of the system increases significant, but the difference between unheated users is noticeably reduced; the RHCR is 50–70%. In the Chinese district heating network, unheated users generally exist in multi-family residential buildings, which adversely affects the heating performance of the whole building and its surrounding users. These effects are directly related to the fairness of heat metering and the rationality of system adjustment. Aiming to study this effect, a model of a multi-family residential heating system that considering the thermo-hydraulic coupling is developed and calibrated. Then, the possible adjacencies between unheated and heating users are described by eight different building areas and three relative user locations. Furthermore, based on the model, this paper analyses the effect of the unheated user on the heating users in different adjacencies and adjustment conditions. Lastly, the influence of unheated users in different areas is studied under different adjustment conditions. The result shows that upside unheated user has the most significant effect on heating users. Under the original condition, the building system is most affected by the unheated user on the ground floor, with a relative heat consumption rate (RHCR) greater than 45%. Under the adjustment condition, the RHCR of the system increases significant, but the difference between unheated users is noticeably reduced; the RHCR is 50–70%. |
ArticleNumber | 111519 |
Author | Liu, Jing Wang, Ruixin Wei, Cun Zhou, Zhigang Cong, Mingyang Ni, Long Jian, Chen |
Author_xml | – sequence: 1 givenname: Ruixin surname: Wang fullname: Wang, Ruixin organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 2 givenname: Mingyang surname: Cong fullname: Cong, Mingyang organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 3 givenname: Cun surname: Wei fullname: Wei, Cun organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 4 givenname: Zhigang surname: Zhou fullname: Zhou, Zhigang email: hit_zzg@163.com organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 5 givenname: Long surname: Ni fullname: Ni, Long email: nilonggn@163.com organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 6 givenname: Jing surname: Liu fullname: Liu, Jing organization: School of Architecture, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin 150090, China – sequence: 7 givenname: Chen surname: Jian fullname: Jian, Chen organization: China Academy of Building Research, Institute of Building Fire Research, Beijing 100013, China |
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Keywords | Unheated user Thermo-hydraulic couplings model Residential building Heating user |
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Snippet | •A high-accuracy thermo-hydraulic couplings model of a multi-family residential heating system.•A new index was defined to evaluate the effect of unheated... In the Chinese district heating network, unheated users generally exist in multi-family residential buildings, which adversely affects the heating performance... |
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SubjectTerms | District heating Heating user Residential areas Residential building Residential buildings Thermo-hydraulic couplings model Unheated user |
Title | The effect of unheated users on residential building in heating performance |
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