Mock Teaching Intro to Solar Electricity

8/11/2019 Mock Teaching Intro to Solar Electricity

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INTRODUCTION TO SOL R ELECTRICITY

AHMAD FATEH BIN MOHAMAD NOR


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Describe the solar energy.

List and explain the benefits of solarelectricity.

Explain solar cells, modules and array.

Understand the electrical specification ofsolar module.

Understand and able to use the I-V curve.

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General Definition: The energy from the sunthat reaches the earth.

Solar heating Solar electricity

generation of electricityfrom the sunlight with theuse of solar cells

heating effect of sunlight tomeet the human needs such asfor drying wet clothes and crops

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Renewable -receive sunlight every day

Clean energy - no carbon dioxide or other

harmful gases are released

Flexible can be designed to the size of

application needed, can also be installed in

rural areas

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Device that converts sunlight to DC electricity

The configurations of a number of solar cellswired in series and parallelto produce a

certain amount of voltage and current arecalled solar modules.

A number of solar modules wired together inseries or in parallel or in both series and

parallelto produce a larger desired amount ofvoltage and current are called solar arrays

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All solar modules are rated according to thepeak power of the solar modules.

The peak power = expected value of powerdelivered by the solar module under the

Standard Test Condition (STC). STCis the international standard of reference

ratings and conditions for solar module.

Under STC, solar module is rated 1000 W/m

of solar radiation and 25 C of celltemperature

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Solar radiation is the amount of sunshine thatreaches the earth.

it is referred to by many names such as solarinsolation, solar irradiation and solarirradiance.

Measured in units of watts per square meter(W/m2) or kilowatts per meter square

(kW/m2) The data of solar radiation can be obtained

from the local meteorological department.

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The y-axis of the I-V curve in Figure 2.9

represents the current (I) produces by thesolar module depending on voltage.

The x-axis represents voltage (V) producesby the solar module at different values of

currents. The power produced by the solar module can

be determined by multiplying the current bythe voltage (P=IV)

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Figure below shows the I-V curve for a solarmodule rated at peak power of 42 watts at STC. If

this module is charging a battery at 12 volts asshown at Point A, determine the value of thecurrent from the module and then calculate theoutput power from the module.

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Current from the module = 3.2 A

Power from the module :-

P=IV=(3.2)(12)=38.4W

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Find one datasheet of any solar module. Then

use the I-V curve in that datasheet to :

1. Determine the value of the current from themodule and

2. Calculate the output power from themodule.(Assume this module is charging abattery at 12 volts and 6 volts.)

3. State the value of the short circuit current

and open circuit voltage of the module.

*This assignment is worth 5% of the total carry mark.*Please submit on or before 14thJanuary 2014.

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Mock Teaching Intro to Solar Electricity

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