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Code
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DL SOLAR-A PHOTOVOLTAIC SOLAR ENERGY TRAINER - didactic equipment
It must correspond to a didactic system for the theoretical and practical study of photovoltaic solar energy facilities.
It must be mounted on a mobile structure that allow it to be moved to the venue for practical sessions and allowing the
photovoltaic panel to receive solar radiation.
The photovoltaic panel, which shall be inclined through a range of 0° to 90°, and the calibrated cell used to measure solar
irradiation, must be on one side, and all of the components of a basic photovoltaic facility used to provide 12 V of direct
current and
230 V of alternating current must be on the other side.
With this trainer it must be possible to carry ou the following practical sessions:
o Identification of all components of the trainer and how they are associated with its operation.
o Measurement of solar irradiation
o Measurement of the voltage and power parameters of the photovoltaic panel.
o Programming the load regulator.
o Analysis of the installation of the trainer.
o Direct current supply.
o Alternating current supply.
LIST OF COMPONENTS:
o 50 W, 12 V photovoltaic panel.
o Cell for measuring solar irradiation.
o Programmable electronic load regulator, with a large LCD screen.
o 150 Wp semi sinusoidal inverter to obtain 230 V of alternating current.
o 17 Ah battery.
o Lamps used with loads of 12 V and 230 V, 50 W
o Instrument used to measure solar irradiation in W/m2.
o Instrument used to measure the charging current.
o Two protective magneto‐thermal switches.
The photovoltaic panel shall have the following features:
monocrystalline solar panel mounted on a wheeled metal base, with a variable inclination angle ranging from 0° to 90°.
metal structure at the top of the photovoltaic panel holding the 4 mm connection sockets and a solar irradiation sensor.
Power: 50 W to 1000 W/m2; 25ºC; AM 1’5
Short-circuit current: 3,2 A
Open circuit voltage: 21,7 V
Maximum power voltage: 17,3 V
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Code
Specifications
Quantity
Maximum power current: 2,9 A
Efficiency: 12-16%
The cell for measuring solar irradiation shall have the following characteristics:
the equipment must incorporate a solar irradiation meter with a W/m2 scale with the following elements
Calibrated cell: special calibrated cell for capturing solar energy and providing a level of voltage that varies according to the
radiation.
The cell must be mounted on the solar panel, with its varying angle for capturing solar energy, thus making it possible to
observe during the practice sessions the way in which the energy received depends on the inclination or elevation.
Meter: analogical measuring device placed on the front of the trainer, together with the other components.
The equipment must be ready for operating, since the only requirement shall be the presence of the sun, and no electrical
power supply shall be used.
The front panel shall include the following components:
- current meter - analogical device for measuring current on a scale from 0 to 10 A. It must be located between the
photovoltaic panel and the regulator, and thus must be constantly measuring the electricity provided to the system.
- regulator: fundamental component for all photovoltaic installations, it must have the function of regulating the battery load
in relation to its status. The regulator must be able to handle a 10 A current, and must incorporate a LCD visualizer to provide
information regarding a range of situations. Its display window shall allow the monitoring of the performable operations and
functions.
-battery: hermetic gel 12 V battery, 17 A/h connected to regulator.
- switches: two magnetic unipolar switches from 10 A to 16 A must work to protect the following circuits:
The connection from the battery to the regulator.
The connection from the battery to the DC/AC inverter.
- Inverter: component that must provide quasi sine wave alternating 230 V voltage, from the direct 12 V voltage coming from
the battery. Its capacity must be 150 Wp. Incorporated on one side must be a starter switch and a bi-color LED that provide two
types of
information:
Green = activated
Red = low or over-charged battery
Loads: the module must incorporate two loads consisting of incandescent lamps, each with an activation switch:
- 12 V 12 V, 50 W lamp, with switch and 4 mm security sockets.
Power for its use must be taken from the regulator output, not from the battery used for the inverter.
- 230 V 230 V, 50 W lamp, with switch and network base for external use. The network base must be independent from the
switch.
The power supply for this section must come directly from the inverter.
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