Community Research and Development Information Service - CORDIS


The aim of the water pumping system Freiburg was to demonstrate the operation of a stand-alone water supply system using regenerative energy sources, as part of the State Garden Show in 1986. The most important feature of this PV pumping system was the incorporation of a buffer battery with newly-developed control electronics. By using battery storage, the utility factor and the length of daily operation were increased noticeably, as the energy delivered by the solar generator resulting from diffuse insolation under the prevailing Central European meteorological conditions could also be used. Although various changes and improvements of individual system components had to be undertaken during the operating period of the system, (almost three years), this project can be rated as very successful overall, which is reflected in the very good measurement results. From experience however, the application of this system must be limited initially to technically developed countries and pumping powers lower than 1.0 kW, as on the one hand, skilled personnel are needed for the technical supervision and on the other hand, the use of battery storage would be uneconomic in larger systems.

Additional information

Authors: KÖTHE H K, Fraunhofer Institut für Solare Energiesysteme, Freiburg (DE);RÖSSLER E, Fraunhofer Institut für Solare Energiesysteme, Freiburg (DE);KOTHE H K, Fraunhofer Institut fur Solare Energiesysteme, Freiburg (DE);ROSSLER E, Fraunhofer Institut fur Solare Energiesysteme, Freiburg (DE)
Bibliographic Reference: EUR 12751 DE/EN (1990) 92 pp., FS, ECU 7.50
Availability: (2)
ISBN: ISBN 92-826-1426-3
Record Number: 199011098 / Last updated on: 1994-12-01
Original language: en
Available languages: de,en