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Numerical study on the thermal performance of water flow window fed with air-conditioning condensate

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  • Chan, Lok Shun

Abstract

A water flow window (WFW) fed with potable water is deemed as an effective system for absorbing incoming heat energy through the glazing area of a window. In this study, condensate formed in an air-conditioning (A/C) system is applied in a WFW for reducing heat gain and electricity consumption of a building. There is no need to consume any potable water. Through building energy simulations and numerical computation, this study unveils that a fully air-conditioned office building operating under a subtropical climate can produce condensate of sufficient flow rate to absorb heat energy from the glazing panes of an A/C condensate fed WFW system. The surface temperature of an outer glazing pane in an A/C condensate fed WFW system can be dropped by 16.3 °C when compared to a Low-e glass window. Moreover, an A/C condensate fed WFW can offer better thermal performance than a conventional WFW. When comparing to a Low-e glass case, an A/C condensate fed WFW facing four different orientations (N, E, S & W) can give reduction percentages of transmitted heat gain ranging from 57.2% to 63.5%. This A/C condensate fed WFW system shows a promising performance and has good potential for real application in commercial buildings.

Suggested Citation

  • Chan, Lok Shun, 2023. "Numerical study on the thermal performance of water flow window fed with air-conditioning condensate," Energy, Elsevier, vol. 263(PB).
    • Handle: RePEc:eee:energy:v:263:y:2023:i:pb:s0360544222025191
    DOI: 10.1016/j.energy.2022.125633
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    References listed on IDEAS

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    1. Lyu, Yuan-Li & Liu, Wen-Jie & Su, Hua & Wu, Xuan, 2019. "Numerical analysis on the advantages of evacuated gap insulation of vacuum-water flow window in building energy saving under various climates," Energy, Elsevier, vol. 175(C), pages 353-364.
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    4. Li, Chunying & Tang, Haida, 2020. "Evaluation on year-round performance of double-circulation water-flow window," Renewable Energy, Elsevier, vol. 150(C), pages 176-190.
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    Cited by:

    1. Ma, Y. & Tao, Y. & Deng, D.L. & Wang, Y. & Tu, J.Y., 2024. "Experimental and numerical investigation on the charging and discharging process of a cold energy storage for space cooling of buildings," Renewable Energy, Elsevier, vol. 222(C).
    2. Dhamodharan, Palanisamy & Bakthavatsalam, A.K. & Nijin, V.P. & Prabakaran, Rajendran & Kim, Sung Chul, 2024. "Enhancing cold storage efficiency: Sustainable apple pre-cooling utilizing polyethylene glycol and waste coconut oil as phase change materials for chilled energy recovery from air-conditioning condens," Energy, Elsevier, vol. 297(C).

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