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Design of a photovoltaic data monitoring system and performance analysis of the 56KW the Murdoch University Library photovoltaic system

De Cerff, Mathew (2013) Design of a photovoltaic data monitoring system and performance analysis of the 56KW the Murdoch University Library photovoltaic system. Other thesis, Murdoch University.

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Abstract

This paper discusses the design of a data monitoring system, for a PV system which would enable the calculation of the performance ratio and a.c energy efficiency of a PV system which the data monitoring system would be installed to. The requirement of this system was to be at low cost and with reasonable accuracy.

The final design of the data monitoring system consists of a total of five sensors, this includes a silicon pyranometer, energy meter, module temperature sensor, a.c voltage sensor and a.c current sensor. The total cost of producing this system was $2002.48.

This paper also discusses the performance analysis of the 56 kW Murdoch University Photovoltaic System. The time period of this analysis is from June 2011 to August 2013.

It was found that over the 27 month time period of the analysis the total system generation was 202.67 MWh of electricity. It was seen in January 2013 a peak in monthly out of 10.17 MWh for this month, and it was seen in June 2012 the system production was at its lowest generating 3.43 MWh. It was established that the sub array which had the best production was sub array 2 generating a total of 24.48 MWh which is 12.08 % of total production, and the worst producing sub array was sub array 3 generating a total of 19.97 MWh which is 9.85 % of total production.

The best yield factor month was in January 2013 producing a monthly average of 181.98 kWh/kWp, and the worst yield factor month was June 2012 producing a monthly average of 61.70kWh/kWp. The overall sub array monthly average yield factor for this 27 month period was 134.47 kWh/kWp, and the poly- crystalline modules and mono- crystalline modules produced a monthly average yield factor of 139.28 kWh/kWp and 135.77 kWh/kWp, respectively.

It was established that the performance ratio of the overall system, poly- crystalline modules and mono- crystalline modules were 0.724, 0.734 and 0.716, respectively. The a.c energy efficiencies of the overall system, poly- crystalline modules and mono- crystalline modules were 10.25%, 10.29% and 10.22%, respectively. This shows that the poly- crystalline modules were the better performing photovoltaic technology.

Publication Type: Thesis (Other)
Murdoch Affiliation: School of Engineering and Information Technology
Supervisor: Calais, Martina
URI: http://researchrepository.murdoch.edu.au/id/eprint/21668
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