Analysis of a roof-top combined photovoltaic / solar thermal plant at Christchurch

Kamel, Fouad and Wilson, Paul (2001) Analysis of a roof-top combined photovoltaic / solar thermal plant at Christchurch. In: 2001 Solar World Congress (ISES 2001), 25 Nov - 2 Dec 2001, Adelaide, Australia.


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This paper presents an economic perspective of rooftop solar systems consisting of a 1kWp grid-connected
photovoltaic (GC-PV) and an evacuated tube solar collector (ETC) water heater (1.37m2 unit) as a case study at
Christchurch, New Zealand. The study considers the case that both systems are partially covering the energy
demand of a one-family house. According to the average availability of solar radiation at Christchurch the
expected year ac energy yield of the 1kWp GC-PV system has been found to be 1018 kWh/year and that of the
solar thermal collector 851 kWh/year. Economic analysis has been carried out on the basis that PV electricity is
fully used, either directly at user premises or by feeding the utility grid whereas the thermal energy made
available by the solar collector is assisting the usual electrical water heating system to supply the necessary hotwater demand. The assumption made in this analysis is that the energy provided by the solar water heater is
entirely replacing the otherwise used electricity for heating water. The final electrical energy demand after
installing the solar system is then calculated. The presented analysis can be applied for larger capacities for
commercial and industrial users considering that repetitive units of the here presented modules can be

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information (displayed to public): Deposited with permission of publisher.
Depositing User: Dr Fouad Kamel
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering
Date Deposited: 19 Mar 2008 01:39
Last Modified: 02 Jul 2013 22:59
Uncontrolled Keywords: rooftop solar systems
Fields of Research (FoR): 09 Engineering > 0906 Electrical and Electronic Engineering > 090602 Control Systems, Robotics and Automation
09 Engineering > 0906 Electrical and Electronic Engineering > 090605 Photodetectors, Optical Sensors and Solar Cells

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