Abstract
This paper presents the design and development of a 16F877 microcontroller-based wireless data acquisition system and a study of the feasibility of different existing methodologies linked to field data acquisition from remote photovoltaic (PV) water pumping systems. Various existing data transmission techniques were studied, especially satellite, radio, Global System for Mobile Communication (GSM) and General Packet Radio Service (GPRS). The system’s hardware and software and an application to test its performance are described. The system will be used for reading, storing and analyzing information from several PV water pumping stations situated in remote areas in the arid region of the south of Tunisia. The remote communications are based on the GSM network and, in particular, on the Short text Message Service (SMS). With this integrated system, we can compile a complete database of the different parameters related to the PV water pumping systems of Tunisia. This data could be made available to interested parties over the Internet.
Highlights
With its good geographical location with respect to solar irradiance, Tunisia is considered one of the better placed countries for the utilization of solar energy
The experimental data registered in our data logger during one complete year (2009) at one hour time intervals and transmitted from the remote photovoltaic water pumping systems in the desert of Tunisia to the personal computer (PC) via the MC 45 Global System for Mobile Communication (GSM) modem were analyzed
3 and 4 show the results obtained for the PV water pumping system (Bel Khchab Sstation) for four days during the months of January, March, July and October, respectively
Summary
With its good geographical location with respect to solar irradiance, Tunisia is considered one of the better placed countries for the utilization of solar energy. Accurate information about the photovoltaic water pumping system parameters at a given location is essential to the development of this type of project This information (in particular, water flow rate, voltage and current of the photovoltaic field, in addition to other meteorological information such as global solar irradiation on an inclined and horizontal surface and ambient temperature) is used in the design, cost analysis, and in calculations on the efficiency of a project. It is important to assemble a complete data base of the different parameters related to the PV water pumping systems in Tunisia. This data could be made available to interested parties on the Internet
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