Investigation of separate or integrated provision of solar cooling and heating for use in typical low-rise residential building in subtropical Hong Kong

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)847-855
Journal / PublicationRenewable Energy
Publication statusPublished - 1 Mar 2015


In this study, the technical effectiveness of solar cooling and heating was investigated for typical low-rise residential building in the subtropical Hong Kong. Since water heating was required for domestic hot water supply rather than space heating, a separate or an integrated provision of solar cooling and heating could be considered. In the separate provision, cooling was handled by an independent solar absorption air-conditioning system, while water heating was offered by a packaged solar thermal collector already equipped with a storage tank. In the integrated provision, all the solar collectors and a centralized hot water storage tank were collectively applied for both driving the absorption chiller and generating domestic hot water. Through year-round dynamic simulation, it was found that the integrated provision could have annual primary energy saving of 13.5% against the separate provision. The effectiveness of the integrated provision was further verified through two energy-saving scenarios, with energy reduction by 17.7% and 18.0% correspondingly as compared to the separate provision. Under the synergistic effect of centralized thermal harness and storage, the integrated solar cooling and heating is more appropriate for typical low-rise residential application in Hong Kong.

Research Area(s)

  • Integrated design, Renewable cooling and heating, Renewable energy, Solar air-conditioning, Solar cooling and heating, Solar water heating