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Potential application of solar thermal systems for hot water production in Hong Kong

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  • Li, Hong
  • Yang, Hongxing

Abstract

This paper presents the evaluation results of conventional solar water heater (SWH) systems and solar assisted heat pump (SAHP) systems for hot water production in Hong Kong. An economic comparison and global warming impact analysis are conducted among the two kinds of solar thermal systems and traditional water heating systems (i.e. electric water heaters and towngas water heaters). The economic comparison results show that solar thermal systems have greater economic benefits than traditional water heating systems. In addition, conventional SWH systems are comparable with the SAHP systems when solar fractions are above 50%. Besides, analysis on the sensitivity of the total equivalent warming impact (TEWI) indicates that the towngas boosted SWH system has the greatest potential in greenhouse gas emission reduction with various solar collector areas and the electricity boosted SWH system has the comparative TEWI with the SAHP systems if its solar fraction is above 50%. As for SAHP systems, the solar assisted air source heat pump (SA-ASHP) system has the least global warming impact. Based on all investigation results, suggestions are given on the selection of solar thermal systems for applications in Hong Kong.

Suggested Citation

  • Li, Hong & Yang, Hongxing, 2009. "Potential application of solar thermal systems for hot water production in Hong Kong," Applied Energy, Elsevier, vol. 86(2), pages 175-180, February.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:2:p:175-180
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    References listed on IDEAS

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    1. Shi, Guo-Hua & Aye, Lu & Li, Dan & Du, Xian-Jun, 2019. "Recent advances in direct expansion solar assisted heat pump systems: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 109(C), pages 349-366.
    2. Panagiotidou, Maria & Aye, Lu & Rismanchi, Behzad, 2020. "Solar driven water heating systems for medium-rise residential buildings in urban mediterranean areas," Renewable Energy, Elsevier, vol. 147(P1), pages 556-569.
    3. Kumar, Naveen & Chavda, Tilak & Mistry, H.N., 2010. "A truncated pyramid non-tracking type multipurpose domestic solar cooker/hot water system," Applied Energy, Elsevier, vol. 87(2), pages 471-477, February.
    4. Li, Hong & Yang, Hongxing, 2010. "Study on performance of solar assisted air source heat pump systems for hot water production in Hong Kong," Applied Energy, Elsevier, vol. 87(9), pages 2818-2825, September.
    5. Jia, Teng & Dai, Yanjun & Wang, Ruzhu, 2018. "Refining energy sources in winemaking industry by using solar energy as alternatives for fossil fuels: A review and perspective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 88(C), pages 278-296.
    6. Pan, Tze-Chin & Kao, Jehng-Jung & Wong, Chih-Po, 2012. "Effective solar radiation based benefit and cost analyses for solar water heater development in Taiwan," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(4), pages 1874-1882.
    7. Suárez, I. & Prieto, M.M. & Fernández, F.J., 2013. "Analysis of potential energy, economic and environmental savings in residential buildings: Solar collectors combined with microturbines," Applied Energy, Elsevier, vol. 104(C), pages 128-136.
    8. Chow, T.T. & Pei, G. & Fong, K.F. & Lin, Z. & Chan, A.L.S. & He, M., 2010. "Modeling and application of direct-expansion solar-assisted heat pump for water heating in subtropical Hong Kong," Applied Energy, Elsevier, vol. 87(2), pages 643-649, February.
    9. Poppi, Stefano & Sommerfeldt, Nelson & Bales, Chris & Madani, Hatef & Lundqvist, Per, 2018. "Techno-economic review of solar heat pump systems for residential heating applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 22-32.
    10. Ma, Zhenjun & Wang, Shengwei, 2009. "Building energy research in Hong Kong: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(8), pages 1870-1883, October.
    11. Weeratunge, Hansani & Aditya, Gregorius Riyan & Dunstall, Simon & de Hoog, Julian & Narsilio, Guillermo & Halgamuge, Saman, 2021. "Feasibility and performance analysis of hybrid ground source heat pump systems in fourteen cities," Energy, Elsevier, vol. 234(C).
    12. Zhang, Shengjun & Wang, Huaixin & Guo, Tao, 2010. "Experimental investigation of moderately high temperature water source heat pump with non-azeotropic refrigerant mixtures," Applied Energy, Elsevier, vol. 87(5), pages 1554-1561, May.
    13. Panaras, G. & Mathioulakis, E. & Belessiotis, V., 2014. "A method for the dynamic testing and evaluation of the performance of combined solar thermal heat pump hot water systems," Applied Energy, Elsevier, vol. 114(C), pages 124-134.
    14. Weeratunge, Hansani & Narsilio, Guillermo & de Hoog, Julian & Dunstall, Simon & Halgamuge, Saman, 2018. "Model predictive control for a solar assisted ground source heat pump system," Energy, Elsevier, vol. 152(C), pages 974-984.
    15. Niu, Shuwen & Zhang, Xin & Zhao, Chunsheng & Ding, Yongxia & Niu, Yunzhu & Christensen, Thomas H., 2011. "Household energy use and emission reduction effects of energy conversion in Lanzhou city, China," Renewable Energy, Elsevier, vol. 36(5), pages 1431-1436.
    16. Arabkoohsar, A. & Farzaneh-Gord, M. & Deymi-Dashtebayaz, M. & Machado, L. & Koury, R.N.N., 2015. "A new design for natural gas pressure reduction points by employing a turbo expander and a solar heating set," Renewable Energy, Elsevier, vol. 81(C), pages 239-250.
    17. Diego-Ayala, U. & Carrillo, J.G., 2016. "Evaluation of temperature and efficiency in relation to mass flow on a solar flat plate collector in Mexico," Renewable Energy, Elsevier, vol. 96(PA), pages 756-764.
    18. Liu, Zengkai & Liu, Yonghong & Zhang, Dawei & Cai, Baoping & Zheng, Chao, 2015. "Fault diagnosis for a solar assisted heat pump system under incomplete data and expert knowledge," Energy, Elsevier, vol. 87(C), pages 41-48.

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