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New optimized model for water temperature calculation of river-water source heat pump and its application in simulation of energy consumption

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  • Si, Pengfei
  • Li, Angui
  • Rong, Xiangyang
  • Feng, Ya
  • Yang, Zhengwu
  • Gao, Qinglong

Abstract

The energy consumption calculation plays an important role in the analysis of project economic and social benefits. In order to calculate energy consumption accurately, this research presents a water temperature of condenser inlet calculation model of river-water source heat pump unit. The feasibility and calculation error of the model had been analyzed. Additionally, the new water temperature calculation model had been validated via an engineering case. The results showed that the hourly water temperature in 24 h could be replaced by daily average water temperature due to little change of the daily water temperature change. In this case, the calculation error could be less than 5%. It is found that despite water temperature has many influenced factors, there is a remarkable relationship between the daily average water temperature and daily average outdoor dry bulb temperature by data analysis (R2 ≈ 0.9). The influence of river sampling location on water temperature calculation of condenser inlet could be ignored due to slight temperature changes (within 0.15 °C). The method proposed in this paper met the engineering accuracy and provided a very effective method for the engineering calculation of energy consumption of water chilling unit.

Suggested Citation

  • Si, Pengfei & Li, Angui & Rong, Xiangyang & Feng, Ya & Yang, Zhengwu & Gao, Qinglong, 2015. "New optimized model for water temperature calculation of river-water source heat pump and its application in simulation of energy consumption," Renewable Energy, Elsevier, vol. 84(C), pages 65-73.
    • Handle: RePEc:eee:renene:v:84:y:2015:i:c:p:65-73
    DOI: 10.1016/j.renene.2015.06.015
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    References listed on IDEAS

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    1. Chow, T. T. & Au, W. H. & Yau, Raymond & Cheng, Vincent & Chan, Apple & Fong, K. F., 2004. "Applying district-cooling technology in Hong Kong," Applied Energy, Elsevier, vol. 79(3), pages 275-289, November.
    2. Zhen, Li & Lin, D.M. & Shu, H.W. & Jiang, Shuang & Zhu, Y.X., 2007. "District cooling and heating with seawater as heat source and sink in Dalian, China," Renewable Energy, Elsevier, vol. 32(15), pages 2603-2616.
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    Cited by:

    1. Zheng, Wandong & Yin, Hao & Li, Bojia & Zhang, Huan & Jurasz, Jakub & Zhong, Lei, 2022. "Heating performance and spatial analysis of seawater-source heat pump with staggered tube-bundle heat exchanger," Applied Energy, Elsevier, vol. 305(C).
    2. Dong, Yixiu & Yan, Hongzhi & Wang, Ruzhu, 2024. "Significant thermal upgrade via cascade high temperature heat pump with low GWP working fluids," Renewable and Sustainable Energy Reviews, Elsevier, vol. 190(PA).
    3. Zhou, Zhihua & Wu, Shengwei & Du, Tao & Chen, Guanyi & Zhang, Zhiming & Zuo, Jian & He, Qing, 2016. "The energy-saving effects of ground-coupled heat pump system integrated with borehole free cooling: A study in China," Applied Energy, Elsevier, vol. 182(C), pages 9-19.
    4. Paul Anton Verwiebe & Stephan Seim & Simon Burges & Lennart Schulz & Joachim Müller-Kirchenbauer, 2021. "Modeling Energy Demand—A Systematic Literature Review," Energies, MDPI, vol. 14(23), pages 1-58, November.

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