Ziel
Design, build and monitor a hybrid thermo-photovoltaic passive solar system for isolated, not grid connected rural or residential houses, combining the know-how of the BARRA passive system for heating and ventilation and the ITALSOLAR polycristalline photovoltaic technology for electricity generation.
(Newly developed combined solar collector for heat and electricity production).
The good behaviour of the BARRA thermal system was confirmed. The efficiency of the PV system was around 8%. For a replication an energy cost of 1.2 ECU/kWh has been evaluated.
The black, anodized aluminium absorbers (louvers) in the BARRA thermal collectors were replaced by pv modules of special design. The generated electricity can be used to increase the efficiency of the (air) thermal collector by driving a ventilator; the pv modules become cheaper as the protection fron the environment and the structure are supplied by the thermal collector.
The special pv modules use polycristalline silicon wafers 5 x 10 cm mounted on anodized aluminium (1.5 mm thick), slightly flexible, incapsulated with EVA and under a TEDLAR cover foil.
24 squaremeters of the building, exposed towards south, were covered with the combined thermal collector/pv-modules. 20 kW thermal power (air temperature increase fron 18 to 40 degrees) and 3,3 kW electric power were obtained including a 33 squaremeter PV traditional system built in front of the house.
Nr. of subsystems : 2
Power of subsystems : 1.4 + 1.9 kW
Total power : 3.3 kWp (electric)+ heat
Backup : Diesel or grid
Number of modules : 159 special design: + 52 type 36SL
Module descr. : ITALSOLAR,3 parallel connected arrays (2.15 A) with 53 series connected elements (53 x 4.14 V = 219 V) each. Each element contains 9 series connected cells (1.4 kW).
Connection : 9 series connected 10 x 10 cm cells, inclined 18 deg. from vertical.
Support : Part of the pv modules is integrated in the thermal collectors, mounted in a steel structure (painted) on the south facade.
Max power tracker : none
Charge controller : Voltage controller.
Battery : 87 lead/acid elements. 150 Ah each, low self discharge
Capacity: 150 Ah (C10)
Inverter : tyristor inverter, controlled diodes, 2.5 kVA.
About 174 V (-10/+20%) DC input, 220 V, 50 Hz. out
Load description : Lighting (824W), 2 water heaters
(1200+1000W),refrigerator (170W), washing machine (2350W), iron (1000W), oven (1500W), television (75W), radio (20W).
Monitoring : Hourly records:
Global irradiance, horizontal and vertical. Ambient temperature. Temperature inlet and outlet of chimneys and certain building parts (walls). Module temperature. Energy from pv modules. Energy to DC and AC loads. Others.
Programm/Programme
Thema/Themen
Aufforderung zur Vorschlagseinreichung
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DEM - Demonstration contractsKoordinator
00139 Roma
Italien