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The Optimization Design of Sewage Heat Exchanger in Direct Sewage Source Heat Pump System

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Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019) (ISHVAC 2019)

Part of the book series: Environmental Science and Engineering ((ENVENG))

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Abstract

With the continuous application of sewage source heat pump technology, research on key technologies in direct sewage source heat pump systems (DSSHPS) is becoming more and more important. The sewage heat exchanger (evaporation in winter, condensation in summer) is the core component of the system, and its correct thermodynamic calculation and reasonable structural design are more critical. In this paper, the sewage flooded evaporator and condenser are taken as examples. Considering the flow characteristics of sewage, the heat exchanger adopts smooth inner wall tube; combines with practical engineering; designs and calculates the two heat exchangers in the direct sewage source heat pump unit by using MATLAB software. The results show that increasing the flow rate of sewage in heat exchanger can increase the flow rate, and increasing the flow rate of sewage in pipe can improve the heat transfer coefficient of sewage side and reduce the fouling thermal resistance. However, increasing the flow velocity in the tube will increase the flow resistance, so it is necessary to comprehensively consider the flow resistance and heat transfer area of the heat exchanger when determining the flow velocity to improve the heat transfer effect. In the sewage heat exchanger, it is more reasonable to use the sewage flow of 4, and the tube arrangement is more reasonable to concentrate the heat exchange tube in the shell center.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Grant No. 51708339), the China Postdoctoral Science Foundation Funded Project (Grant No.2017M612303).

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Authors and Affiliations

  1. School of Thermal Engineering, Shandong Jianzhu University, Jinan, 250101, China

    Zhaoyi Zhuang, Jun Xu, Jian Song & Wenzeng Shen

  2. Shandong Zhongrui New Energy Technology Co., Ltd, Jinan, 250101, China

    Zhaoyi Zhuang

Authors
  1. Zhaoyi Zhuang
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  2. Jun Xu
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  3. Jian Song
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  4. Wenzeng Shen
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Corresponding author

Correspondence to Zhaoyi Zhuang .

Editor information

Editors and Affiliations

  1. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Zhaojun Wang

  2. Department of Building Science, School of Architecture, Tsinghua University, Beijing, China

    Yingxin Zhu

  3. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Fang Wang

  4. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Peng Wang

  5. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Chao Shen

  6. Department of Building Thermal Engineering, School of Architecture, Harbin Institute of Technology, Harbin, Heilongjiang, China

    Jing Liu

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Zhuang, Z., Xu, J., Song, J., Shen, W. (2020). The Optimization Design of Sewage Heat Exchanger in Direct Sewage Source Heat Pump System . In: Wang, Z., Zhu, Y., Wang, F., Wang, P., Shen, C., Liu, J. (eds) Proceedings of the 11th International Symposium on Heating, Ventilation and Air Conditioning (ISHVAC 2019). ISHVAC 2019. Environmental Science and Engineering(). Springer, Singapore. https://doi.org/10.1007/978-981-13-9524-6_73

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