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A Grey-Box Dynamic Model of Plate Heat Exchangers Used in an Urban Heating System

Author

Listed:
  • Qingwei Miao

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China)

  • Shijun You

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China)

  • Wandong Zheng

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China
    State Key Laboratory of Building Safety and Built Environment, China Academy of Building Research, Beijing 100013, China
    These authors contributed equally to this work.)

  • Xuejing Zheng

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China
    These authors contributed equally to this work.)

  • Huan Zhang

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China)

  • Yaran Wang

    (School of Environment Science and Technology, Tianjin University, Tianjin 300072, China)

Abstract

This paper deals with the establishment of a grey-box model of plate heat exchangers. First, a second-order state space model of plate heat exchangers is developed. Then, the model is solved by the white-box method and grey-box method, respectively. In the white-box method, the linearization of the state space model is carried out by implicit difference scheme and the overall heat transfer coefficient was calculated with empirical correlation of the Nusselt number. In the grey-box method, a newly developed parameter identification method was established. The simulation results of two outlet temperatures by the grey-box and white-box method, respectively, are compared with the test data. It is shown that the grey-box method is more suitable and accurate for the simulations of outlet temperatures than the white-box method. Thus, it can provide practitioners and heating engineers with tools to design controllers for district heating systems.

Suggested Citation

  • Qingwei Miao & Shijun You & Wandong Zheng & Xuejing Zheng & Huan Zhang & Yaran Wang, 2017. "A Grey-Box Dynamic Model of Plate Heat Exchangers Used in an Urban Heating System," Energies, MDPI, vol. 10(9), pages 1-16, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:9:p:1398-:d:111857
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    References listed on IDEAS

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    1. Cihan Turhan & Silvio Simani & Ivan Zajic & Gulden Gokcen Akkurt, 2017. "Performance Analysis of Data-Driven and Model-Based Control Strategies Applied to a Thermal Unit Model," Energies, MDPI, vol. 10(1), pages 1-20, January.
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    Cited by:

    1. Michel Noussan & Benedetto Nastasi, 2018. "Data Analysis of Heating Systems for Buildings—A Tool for Energy Planning, Policies and Systems Simulation," Energies, MDPI, vol. 11(1), pages 1-15, January.
    2. Saranmanduh Borjigin & Ting Ma & Min Zeng & Qiuwang Wang, 2018. "A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers," Energies, MDPI, vol. 11(7), pages 1-15, July.

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