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Mathematical Problems in Engineering
Volume 2012, Article ID 343080, 19 pages
http://dx.doi.org/10.1155/2012/343080
Research Article

Photovoltaic Pumps: Technical and Practical Aspects for Applications in Agriculture

1Department of Agriculture, Forests, Nature and Energy (DAFNE), University of Tuscia, Via S. Camillo de Lellis, 01100 Viterbo, Italy
2Department of Agrarian and Environment Science, University of Udine, Via delle Scienze 208, 33100 Udine, Italy

Received 22 August 2012; Accepted 23 September 2012

Academic Editor: Massimo Scalia

Copyright © 2012 A. Petroselli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The paper deals with a series of tests conducted on a PV-DC pump in Viterbo (42°24′ North, 12°06′ East). The tests lasted from January 2003 up to November 2004 and involved measurements of solar radiation, on both a horizontal surface and the tilted module surface, flow rates, volumes, and total dynamic heads. In total, up to 3000 data were collected every day whose analysis allowed us to find empirical relationships among system efficiencies, solar radiations, and total dynamic heads. In the second part of the paper we develop a simple method that allows both the assessment of performances of the whole system when installed in a different site from that in which the tests were performed and the optimal inclination angle of the panel to be determined in relation to annual or seasonal use (see irrigation).