Solar energy conversion efficiency

1. Conversion efficiency of solar water heater;

: tilt angle of the water heater, that is, the angle between the heating surface of the water heater and the heating surface of the solar water heater.

: The intensity of solar radiation, that is to say the energy of solar radiation obtained in unit of time on a unit surface area.

: The angle of intersection of the sun's rays with the ground plane, i.e. is the local elevation angle of the sun. Local geographic latitude

: Latitude of the direct point of the sun. Thermal efficiency of solar water heater.

Secondly, first test the output voltage and current of the tested solar panel under standard light intensity:

1. Standard light intensity refers to: AM1.5, 1000W/square meter, module temperature: 25 degrees, it is better to use special Solar Photovoltaic Tester for testing.

2 . Parameters to test: Pw, Vop, Iop,Voc, Isc.

3. of the solar panel then divide it by 1000 to get the efficiency.

Hypothesis: The solar cell The power of the board is 5W, the area is: 0.03 square meters,

In other words, it will be in square meters that 16.7% of the solar energy of 1000 W is converted into electrical energy.