Applied Engineering

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Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems

Received: 28 September 2018    Accepted: 17 October 2018    Published: 21 November 2018
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Abstract

District heating and cooling system is an energy-efficient and environment-friendly way of energy supply. Transmission and distribution pipeline system is an essential part of district heating and cooling system. Underground buried laying is the prevailing way of transmission and distribution pipeline system in district heating and cooling systems. Heat transfer calculation of pipeline is very important to determine the thickness of the insulation layer, accessory load of central plant, and the possibility of thermal damage. There are some factors that influence the heat transfer calculation of underground buried pipeline, including: temperature difference between fluid and soil, pipe insulation properties, burial depth, soil thermal conductivity and distance between adjacent pipes. Numerical methods to compute transient heat gains or losses in underground piping systems, is complicated and time consuming. To simplify the calculations, this paper introduces the steady-state thermal calculation method based on thermal resistance formulations that, that avoids the complex calculation process, and greatly simplifies the computational effort, and the calculated results can meet project needs. This method is suitable for the majority types of buried pipeline, so it can be used as reference for engineering design.

DOI 10.11648/j.ae.20180202.12
Published in Applied Engineering (Volume 2, Issue 2, December 2018)
Page(s) 33-38
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Distribution System, Underground Buried, Thermal Resistance, Steady-State Calculations

References
[1] Phetteplace, G., and V. Meyer. 1990. Piping for thermal distribution systems. CRREL Internal Report 1059. U. S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH.
[2] ASHRAE. 2011 ASHRAE Handbook—HVAC Application Chapter 34 Geothermal Energy. America: ASHRAE, 2011.
[3] China Academy of Building Research. GB 50736—2012 Design code for heating ventilation and air conditioning for civil buildings [S]. Beijing: China Construction Industry Press, 2012.
[4] ASHRAE. 2012 ASHRAE Handbook—HVAC Systems and Equipment Chapter 12 District Heating and Cooling. America: ASHRAE, 2012.
[5] Phetteplace, G. E., D. Carbee, and M. Kryska. 1991. Field measurement ofheat losses from three types of heat distribution systems. CRREL SR 631. U. S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH.
[6] Zhang Ximin, Ren Zeipei, Mei Feiming. Science of heat transmission [M]. Version 5. Beijing: China Construction Industry Press, 2007.
[7] Beijing gas thermal engineering design institute co., Ltd. CJJ 34—2010 Design code for city heating network[S]. Beijing: China Construction Industry Press, 2010.
[8] Urban construction research institute, Beijing gas thermal engineering design institute co., Ltd. CJJ/T81-2013 Technical specification for directly buried hot-water heating pipeline in city [S]. Beijing: China Construction Industry Press, 2013.
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  • APA Style

    Jianguang Yi. (2018). Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems. Applied Engineering, 2(2), 33-38. https://doi.org/10.11648/j.ae.20180202.12

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    ACS Style

    Jianguang Yi. Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems. Appl. Eng. 2018, 2(2), 33-38. doi: 10.11648/j.ae.20180202.12

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    AMA Style

    Jianguang Yi. Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems. Appl Eng. 2018;2(2):33-38. doi: 10.11648/j.ae.20180202.12

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  • @article{10.11648/j.ae.20180202.12,
      author = {Jianguang Yi},
      title = {Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems},
      journal = {Applied Engineering},
      volume = {2},
      number = {2},
      pages = {33-38},
      doi = {10.11648/j.ae.20180202.12},
      url = {https://doi.org/10.11648/j.ae.20180202.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ae.20180202.12},
      abstract = {District heating and cooling system is an energy-efficient and environment-friendly way of energy supply. Transmission and distribution pipeline system is an essential part of district heating and cooling system. Underground buried laying is the prevailing way of transmission and distribution pipeline system in district heating and cooling systems. Heat transfer calculation of pipeline is very important to determine the thickness of the insulation layer, accessory load of central plant, and the possibility of thermal damage. There are some factors that influence the heat transfer calculation of underground buried pipeline, including: temperature difference between fluid and soil, pipe insulation properties, burial depth, soil thermal conductivity and distance between adjacent pipes. Numerical methods to compute transient heat gains or losses in underground piping systems, is complicated and time consuming. To simplify the calculations, this paper introduces the steady-state thermal calculation method based on thermal resistance formulations that, that avoids the complex calculation process, and greatly simplifies the computational effort, and the calculated results can meet project needs. This method is suitable for the majority types of buried pipeline, so it can be used as reference for engineering design.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Methods of Heat Transfer Analysis of Buried Pipes in District Heating and Cooling Systems
    AU  - Jianguang Yi
    Y1  - 2018/11/21
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ae.20180202.12
    DO  - 10.11648/j.ae.20180202.12
    T2  - Applied Engineering
    JF  - Applied Engineering
    JO  - Applied Engineering
    SP  - 33
    EP  - 38
    PB  - Science Publishing Group
    SN  - 2994-7456
    UR  - https://doi.org/10.11648/j.ae.20180202.12
    AB  - District heating and cooling system is an energy-efficient and environment-friendly way of energy supply. Transmission and distribution pipeline system is an essential part of district heating and cooling system. Underground buried laying is the prevailing way of transmission and distribution pipeline system in district heating and cooling systems. Heat transfer calculation of pipeline is very important to determine the thickness of the insulation layer, accessory load of central plant, and the possibility of thermal damage. There are some factors that influence the heat transfer calculation of underground buried pipeline, including: temperature difference between fluid and soil, pipe insulation properties, burial depth, soil thermal conductivity and distance between adjacent pipes. Numerical methods to compute transient heat gains or losses in underground piping systems, is complicated and time consuming. To simplify the calculations, this paper introduces the steady-state thermal calculation method based on thermal resistance formulations that, that avoids the complex calculation process, and greatly simplifies the computational effort, and the calculated results can meet project needs. This method is suitable for the majority types of buried pipeline, so it can be used as reference for engineering design.
    VL  - 2
    IS  - 2
    ER  - 

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  • East China Architecture Design & Research Institute Co., Ltd, Shanghai, China

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