{"title":"Dynamic thermal performance of district heating network under typical safety accidents","authors":"Yong Qiu, Guojun Li, Linyang Wei, Tai Zhang","doi":"10.1080/19401493.2022.2078407","DOIUrl":null,"url":null,"abstract":"The key to guarantee district heating (DH) network work normally is to improve its safety performance which requires us to know the feedback of DH network in time when an accident occurs. Therefore, a dynamic mathematical model of coupled thermo-hydraulic for anticipating the dynamics in DH systems is established in this work. The dynamic temperature of the DH network and time delay of the coupled thermohydraulic transmission are investigated when the accident (insulation layer falling off or water supply temperature sudden change) occurs. The effects of two accidents on the DH network are analyzed thoroughly. The results show that the proposed model is suitable for the numerical simulation of specific conditions of the DH network. This is helpful to obtain the data information of the DH network under accident conditions and promote the stable operation of DH network. This method can be combined with other techniques to further improve the performance.","PeriodicalId":49168,"journal":{"name":"Journal of Building Performance Simulation","volume":"2 1","pages":"678 - 690"},"PeriodicalIF":2.2000,"publicationDate":"2022-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Building Performance Simulation","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1080/19401493.2022.2078407","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The key to guarantee district heating (DH) network work normally is to improve its safety performance which requires us to know the feedback of DH network in time when an accident occurs. Therefore, a dynamic mathematical model of coupled thermo-hydraulic for anticipating the dynamics in DH systems is established in this work. The dynamic temperature of the DH network and time delay of the coupled thermohydraulic transmission are investigated when the accident (insulation layer falling off or water supply temperature sudden change) occurs. The effects of two accidents on the DH network are analyzed thoroughly. The results show that the proposed model is suitable for the numerical simulation of specific conditions of the DH network. This is helpful to obtain the data information of the DH network under accident conditions and promote the stable operation of DH network. This method can be combined with other techniques to further improve the performance.
期刊介绍：
The Journal of Building Performance Simulation (JBPS) aims to make a substantial and lasting contribution to the international building community by supporting our authors and the high-quality, original research they submit. The journal also offers a forum for original review papers and researched case studies
We welcome building performance simulation contributions that explore the following topics related to buildings and communities:
-Theoretical aspects related to modelling and simulating the physical processes (thermal, air flow, moisture, lighting, acoustics).
-Theoretical aspects related to modelling and simulating conventional and innovative energy conversion, storage, distribution, and control systems.
-Theoretical aspects related to occupants, weather data, and other boundary conditions.
-Methods and algorithms for optimizing the performance of buildings and communities and the systems which service them, including interaction with the electrical grid.
-Uncertainty, sensitivity analysis, and calibration.
-Methods and algorithms for validating models and for verifying solution methods and tools.
-Development and validation of controls-oriented models that are appropriate for model predictive control and/or automated fault detection and diagnostics.
-Techniques for educating and training tool users.
-Software development techniques and interoperability issues with direct applicability to building performance simulation.
-Case studies involving the application of building performance simulation for any stage of the design, construction, commissioning, operation, or management of buildings and the systems which service them are welcomed if they include validation or aspects that make a novel contribution to the knowledge base.
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