In the frame of a research project carried on by ENEA in the inland of Sicily, preliminary results on the utilization of a stand-alone photovoltaic system to produce electricity for a prototype of a PV closed greenhouse system, are reported. The PV closed greenhouse prototype was located in an agriculture area with a large presence of greenhouses (about 9,000 he), near the town of Ragusa. The site is located near the sea coast (36°50’ latitude, 14°31’ longitude, 87 m of altitude). The PV greenhouse prototype was provided with a stand-alone photovoltaic (PV) system (1.08 kWp DC peak power) and equipped with a battery bank (24V/900Ah) to store the electric power, as well as an inverter device (24Vdc/230Vac; 2500 W) to produce AC electricity. The PV arrays where positioned on the roof of the prototype. A hydroponics system to carry on a plant tomato crop was also installed inside the PV greenhouse prototype. Performances about the PV energy generation and the supply of electricity for circulating the hydroponics nutrient solution, were monitored during the period mid December 2007-April 2008. A data logger monitoring system was also installed in order to record outside climatic parameters of temperature, humidity, total and PAR radiation. In addition, another data-logger was used to record power and currents measurements, with attention to the daily electricity energy production delivered by the PV arrays, the daily net energy stored in the batteries or discharged from the batteries, and the energy consumed by the available greenhouse users. Preliminary results of the PV solar system were satisfactorily. The PV technology supported adequately the electricity demand of the cultivated hydroponics tomato crop, which on the base of the pumping electricity demand shown an energy consumption of about 1 kWh/plant. The 1.08 kWp PV arrays produced a total energy of about 220 kWh in the period September-December 2008.
Preliminary results of a PV closed greenhouse system for high irradiation zones in South Italy
BIBBIANI, CARLO;INCROCCI, LUCA
2011-01-01
Abstract
In the frame of a research project carried on by ENEA in the inland of Sicily, preliminary results on the utilization of a stand-alone photovoltaic system to produce electricity for a prototype of a PV closed greenhouse system, are reported. The PV closed greenhouse prototype was located in an agriculture area with a large presence of greenhouses (about 9,000 he), near the town of Ragusa. The site is located near the sea coast (36°50’ latitude, 14°31’ longitude, 87 m of altitude). The PV greenhouse prototype was provided with a stand-alone photovoltaic (PV) system (1.08 kWp DC peak power) and equipped with a battery bank (24V/900Ah) to store the electric power, as well as an inverter device (24Vdc/230Vac; 2500 W) to produce AC electricity. The PV arrays where positioned on the roof of the prototype. A hydroponics system to carry on a plant tomato crop was also installed inside the PV greenhouse prototype. Performances about the PV energy generation and the supply of electricity for circulating the hydroponics nutrient solution, were monitored during the period mid December 2007-April 2008. A data logger monitoring system was also installed in order to record outside climatic parameters of temperature, humidity, total and PAR radiation. In addition, another data-logger was used to record power and currents measurements, with attention to the daily electricity energy production delivered by the PV arrays, the daily net energy stored in the batteries or discharged from the batteries, and the energy consumed by the available greenhouse users. Preliminary results of the PV solar system were satisfactorily. The PV technology supported adequately the electricity demand of the cultivated hydroponics tomato crop, which on the base of the pumping electricity demand shown an energy consumption of about 1 kWh/plant. The 1.08 kWp PV arrays produced a total energy of about 220 kWh in the period September-December 2008.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
