Please explain about effect of weather conditon such as in rainy season when the
energy of sunligth is decrese? Is the energy that produce from PV Module decrease and
how many percentage of decrease?
Replies:
Power produced by a PV module varies with the changing intensity of incident light. The rate of electron production by photons striking the solar cell is directly proportional to the intensity of the light. That is, as the irradiance increases, the short circuit current (Isc) and the open circuit voltage (Voc) increase resulting in an increase in the overall power (Pmax). Cloud in rainy seasons weakens drastically the incoming direct component of solar radiation reaching the surface of the module resulting in minimum output power. So the daily energy produced by the module is lower compared to cloudless days. The percentage of PV performance decreasing depends on how severe the cloud is. But, by ignoring some details, performance of a PV module can be calculated by deploying a simple formula: Energy production = capacity of the module (Wp) x peak sun hours (it can be daily, monthly, or annualy) x efficiency of the module. Peak sun hour data can be derived from meteorological agency. For Indonesia you also can find it here https://www.sciencedirect.com/science/article/abs/pii/S1364032111005703
By doing so, you can compare the performance of a PV module in different seasons.
PV performance varies with cell temperature. As the temperature increased, the open circuit voltage (Voc) of the module decreased. This in turn reduces the power output of the module. In case of a low cost solar simulator, the temperature tends to increase as the operating time of the solar simulator increases. IEC-Standard-60891 is used to apply to convert electrical paramaters of a PV module to a standard condition reffering to temperature: 25oC, in-plane irradiance: 1000 W/m2.
what affects the output power of the PV module only sunlight? what if
there is light other than sunshine where the intensity of that light
matches the sun^s light
Replies:
In addition to the solar irradiation, performance of a PV module is affected by several factors including ambient temperature, type of PV technology, tilt angle of PV module, and soiling. In the research, we focused on the effect of solar irradiation simulated by halogen lamps of a solar simulator. Artificial light produced by a solar simulator is not precisely similar to solar irradiance. It still shares some defects when input voltages are changed, as a result the spectrum and the distribution of light intensity are not uniform over the available collector test area. However, it can provide a controllable indoor test facility under laboratory conditions, used for the testing of solar cells.
