City University of Hong Kong Department Name

 

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Hybrid photovoltaic/thermal technology

 

 Photovoltaic-thermal (PV/T) systems refer to the integration of photovoltaic and solar thermal technologies into one single system, in that both useful heat energy and electricity are produced. A typical arrangement is the direct attachment of PV modules on to a solar thermal collector surface. For a given collector surface area, the overall system energy performance is expected higher than the conventional ˇ°side-by-sideˇ± PV and solar thermal systems. Its applications can be in a wide range of building types, in particular for the domestic buildings. The rationale behind the hybrid concept is that a solar cell converts only 6-15% of the incoming solar radiation into electricity. More than 85% of the solar energy is either reflected or converted into heat. This subsequently may bring about a substantial increase in cell operating temperature. By cooling the solar cells with a fluid stream like air or water, the electrical output can be improved.

Study of air-cooled PV panel wall installed at a subtropical hotel building

 In the warm or hot climatic regions, the direct production of service hot water has a higher market value than generating warm air for space heating. The higher year round ambient air temperature makes the PV/T option more attractive than the plain PV application. One basic design is the insertion of the PV module inside a conventional sheet-and-tube type solar thermal collector. Fin performance of the thermal absorber has been identified as one crucial factor that affects much the overall energy performance of the hybrid collector. Accordingly, an aluminum-alloy flat-box PV/T collector prototype was constructed and tested. With a simple and handy design, this new design is very suitable for domestic hot water system application.

 Other innovative designs and applications of flat-plate PV/T collectors include the building-integrated PV/water-heating systems, PV-airflow double façade/glazing and PV-integrated solar heat-pump/heat-pipe systems.

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                                       Front view of a flat-box PV/T collector prototype                                               A Bi-PV/W experimental rig

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            Assembly of aluminum-alloy flow modules


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Related publications :

 

Keynote speeches:

Chow TT. Hybrid solar technology: a way to maximize the use of captured solar radiation. Proceedings of SOLARIS 2007, the 3rd International Conference on Solar Radiation and Day Lighting, New Delhi, India, Feb 2007, Vol.1, Anamaya Publishers, 347-357.

Menezo C, Chow TT. Solar hybrid photovoltaic and building integration of photovoltaic components. Seminar on Renewable Energy Integrated with Construction, Joint China/France Eco-Construction Week, Rhone Alps Pavilion, Shanghai Expo, 10 June 2010.

Chow Tin-Tai. Advancements in photovoltaic/thermal hybrid solar technology. ICCE2012, the 12th International Conference on Clean Energy, XiˇŻan, China, 26-30 October, 2012.

Book Chapter:

Chow TT. Developments in photovoltaic/thermal solar systems. In: Solar Energy: Research, Technology and Applications, Chapter 10, Nova Science Publishers, ISBN: 978-1-60456-739-7, New York, 2008, pp.349-374.

Editorial:

Chow TT, Tiwari GN, Menezo Christophe. Hybrid Solar Technology for Power Polygeneration and Energy Saving. International Journal of Photoenergy, Volume 2012, Article ID 957425, 2 pages, 2012. (doi:10.1155/2012/957425)

Journal articles:

Chow TT, Hand JW, Strachan PA. Building-integrated photovoltaic and thermal applications in a subtropical hotel building. Applied Thermal Engineering, 23(16), 2003, 2035-2049.

Ji Jie, Chow Tin-Tai, He Wei. Dynamic performance of hybrid photovoltaic/thermal collector wall in Hong Kong. Building and Environment, Vol. 38(11), 2003, 1327-1334.

Chow TT. Performance analysis of photovoltaic-thermal collector by explicit dynamic model. Solar Energy, 75(2), 2003, 143-152.

Chow TT, Chan ALS, Fong KF, Lo WC, Song CL. Energy performance of a solar hybrid collector system in multi-story apartment building. Journal of Power and Energy, Proceedings of the Institution of Mechanical Engineers Part A, 219(1), 2005, 1-11.

Chow TT, He W, Ji J. Hybrid photovoltaic-thermosyphon water heating system for residential application. Solar Energy, 80(3), 2006, 298-306.

He Wei, Chow Tin-Tai, Ji Jie, Lu Jianping, Pei Gang, Chan Lok-shun. Hybrid photovoltaic and thermal solar collector designed for natural circulation of water. Applied Energy, 83(3), 2006, 199-210.

Ji Jie, Han Jun, Chow Tin-tai, Han Chongwei, Lu Jianping, He Wei. Effect of flow channel dimensions on the performance of a box-frame photovoltaic/thermal collector, Proceedings of the Institution of Mechanical Engineers Part A - Journal of Power and Energy, 220(7), 2006, 681-688.

Ji Jie, Han Jun, Chow Tin-tai, Yi Hua, Lu Jianping, He Wei, Sun Wei. Effect of fluid flow and packing factor on energy performance of a wall-mounted hybrid photovoltaic/water-heating collector system. Energy and Buildings, 38(12), 2006, 1380-1387.

Chow TT, He W, Ji J. An experimental study of façade-integrated photovoltaic/water-heating system. Applied Thermal Engineering, 27(1), 2007, 37-45.

Chow TT, He W, Ji J, Chan ALS. Performance evaluation of photovoltaic-thermosyphon system for subtropical climate application. Solar Energy, 81(1), 2007, 123-130.

Ji Jie, Lu Jian-Ping, Chow Tin-Tai, He Wei, Pei Gang. A sensitivity study of a hybrid photovoltaic/thermal water-heating system with natural circulation. Applied Energy, 84(2), 2007, 222-237.

Ji Jie, Liu Keliang, Chow Tin-tai, Pei Gang, He Hanfeng. Thermal analysis of PV/T evaporator of a solar assisted heat pump. International Journal of Energy Research, 31(5), 2007, 525-545.

Chow TT, Ji J, He W. Photovoltaic-thermal collector system for domestic application. ASME Journal of Solar Energy Engineering, 129, May 2007, 205-209.

Chow TT, Fong KF, He W, Lin Z, Chan ALS. Performance evaluation of a PV ventilated window applying to office building of Hong Kong, Energy and Buildings, 39(6), 2007, 643-650.

Ji Jie, Liu Keliang, Chow Tin-Tai, Pei Gang, He Wei, He Hanfeng. Performance analysis of a photovoltaic heat pump. Applied Energy, 85(8), 2008, 680-693.

Ji Jie, Jiang Bin, Yi Hua, Chow Tin-Tai, He Wei, Pei Gang. An experimental and mathematical study of efforts of a novel photovoltaic-Trombe wall on a test room. International Journal of Energy Research, 32 (6), 2008, 531-542.  

Pei G, Ji J, Chow TT, He H, Liu K, Yi H. Performance of the photovoltaic solar-assisted heat pump system with and without glass cover in winter: a comparative analysis. Proceedings of the Institution of Mechanical Engineers Part A - Journal of Power and Energy, 222(A2), 2008, 179-187.  

Ji Jie, Pei Gang, Chow Tin-Tai, Liu Keliang, He Hanfeng, Lu Jian-Ping, Han Chongwei. Experimental study of photovoltaic solar assisted heat pump system. Solar Energy, 82(1), 2008, 43-52.

Chow TT, He W, Chan ALS, Fong KF, Lin Z, Ji J. Computer modeling and experimental validation of a building-integrated photovoltaic and water heating system. Applied Thermal Engineering, 28(11-12), 2008, 1356-1364.

Chow TT, Pei G, Chan LS, Lin Z, Fong KF. A comparative study of PV glazing performance in warm climate. Indoor and Built Environment, 18(1), 2009, 32-40.

Chow TT, Pei G, Fong KF, Lin Z, Chan ALS, Ji J. Energy and exergy analysis of photovoltaic-thermal collector with and without glass cover. Applied Energy, 86(3), 2009, 310-316.

Chow Tin-tai, Qiu Zhongzhu, Li Chunying. Potential application of ˇ°see-throughˇ± solar cells in ventilated glazing in Hong Kong. Solar Energy Materials and Solar Cells, 93, 2009, 230-238..

Chow TT, Chan ALS, Fong KF, Lin Z, He W, Ji J. Annual performance of building-integrated photovoltaic/water-heating system for warm climate application. Applied Energy, 86(5), 2009, 689-696.

Ji Jie, He Hanfeng, Chow Tin-tai, Pei Gang, He Wei, Liu Keliang. Distributed dynamic modeling and experimental study of PV evaporator in a PV/T solar-assisted heat pump. International Journal of Heat and Mass Transfer, 52, 2009, 1365-1373.

Liu Keliang, Ji Jie, Chow Tin-tai, Pei Gang, He Hanfeng, Jiang Aiguo, Yang Jichun. Performance study of a photovoltaic solar assisted heat pump with variable-frequency compressor ¨C A case study in Tibet. Renewable Energy, 34(12), 2009, 2680-2687.

Chow TT. A review on photovoltaic/thermal hybrid solar technology. Applied Energy, 87(2), 2010, 365-379.

Chow TT, Fong KF, Pei G, Ji J, He M. Potential use of photovoltaic-integrated solar heat pump system in Hong Kong. Applied Thermal Engineering, 30, 2010, 1066-1072.

Pei Gang, Fu Huide, Ji Jie, Chow Tin-Tai, Zhang Tao. Annual analysis of heat pipe PV/T systems for domestic hot water and electricity production. Energy Conversion and Management, 56, 2012, 8-2.

Fu HD, Pei G, Ji J, Long H, Zhang T, Chow TT. Experimental study of a photovoltaic solar-assisted heat-pump/heat-pipe system. Applied Thermal Engineering, 40, July 2012, 343-350.

Bai Y, Chow TT, Menezo C, Dupeyrat P. Analysis of a hybrid PV/thermal solar-assisted heat pump system for sports center water heating application. International Journal of Photoenergy, Volume 2012, Article ID 265838, 13 pages, 2012. (doi:10.1155/2012/265838)

Chow Tin-Tai, Ji Jie. Environmental life cycle analysis of hybrid solar photovoltaic/thermal systems for use in Hong Kong. International Journal of Photoenergy, Volume 2012, Article ID 101968, 9 pages, 2012. (doi:10.1155/2012/101968)

Chow TT, Tiwari GN, Menezo C. Hybrid solar ¨C a review on photovoltaic and thermal power integration. International Journal of Photoenergy, Volume 2012, Article ID 307287, 17 pages, 2012. (doi:10.1155/2012/307287)

Conference papers:

Chow TT, Hand JW, Strachan PA. Building-integrated photovoltaic application in a warm climatic region. Proceedings of Asia Pacific Conference 2003 on Built Environment, Hong Kong SAR, China, Nov 2003, 4:11-20

Chow TT. A hybrid solar collector simulation model. Proceedings of ISHTEEC 2004, the 3rd International Symposium on Heat Transfer Enhancement and Energy Conservation, Guangzhou, China, Jan 2004, Vol.1, 1246-1252.

Chow TT, Chan ALS, Fong SKF, Lo EWC. Potential of applying hybrid solar technology in Hong Kong. Proceedings of CIB World Building Congress 2004, Toronto, Canada, May 2004. (CD ROM)

Chow TT, Fong KF. Façade-integrated solar systems for Hong Kong: PV or thermal technology? Proceedings of the International Conference on Alternative Energy, Hong Kong, China, Jun 2005, 101-108.

Chow TT, Ji J, He W. Photovoltaic-thermal collector system for domestic application. Proceedings of ISEC2005, 2005 Solar World Congress, Orlando, USA, Aug 2005 (CD ROM)

Chow TT. Hybrid solar technology: a way to maximize the use of captured solar radiation. Proceedings of SOLARIS 2007, the 3rd International Conference on Solar Radiation and Day Lighting, New Delhi, India, Feb 2007, Vol.1, Anamaya Publishers, 347-357.

He Wei, Ji Jie, Zhang Aifeng, Chow Tin-tai. Annual energy performance simulation of a facade integrated photovoltaic and water heating system in east China. Proceedings of ISES Solar World Congress 2007, Solar Energy and Human Settlement, Beijing, China, Sep 2007, 1:298-303.

Chow TT, Chan ALS, Fong KF, Lin Z. Warm climate application of hybrid photovoltaic and water-heating system. Proceedings of IAQVEC 2007, the 6th International Conference on Indoor Air Quality, Ventilation & Energy Conservation in Buildings, Sendai, Japan, Oct 2007. (CD-ROM)

Chow TT, Chan ALS, Lin Z, Fong KF, Pei G. Test of energy performance of photovoltaic/airflow windows in subtropical Hong Kong. Proceedings of SOLARIS 2008, the 4th International Conference on Solar Radiation and Daylighting, Hong Kong SAR, China, December 2008, 44-51.

Chow Tin-tai, Qiu Zhongzhu, Li Chunying. Performance evaluation of PV ventilated glazing. Proceedings of Building Simulation 2009, the 11th IBPSA International Conference, Glasgow, UK, July 2009. (CD-ROM)

Qiu ZZ, Chow TT, Li P. Performance evaluation of the photovoltaic double-skin facade used in office building. Proceedings of Building Simulation 2009, the 11th IBPSA International Conference, Glasgow, UK, July 2009. (CD-ROM)

Chow TT, Tse KK, Tse Norman CF. A case study of performance of hybrid solar collector system as compared to side-by-side photovoltaic and water-heating systems. APEC Conference on Low-carbon Towns and Physical Energy Storage, Changsha, China, 25-26 May 2013. (CD-ROM)


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