PV Module Temperature

Source: ResearchGate

Understanding the Impact of Encapsulation on Solar Cell Performance

When solar cells are encapsulated into a PV module, an unintended consequence is the alteration of heat flow in and out of the module. This alteration leads to a slight increase in the operating temperature of the PV module. The increase in temperature has a direct impact on the performance of the PV module, primarily by reducing its voltage and subsequently lowering the output power.

Effects of Temperature on PV Module Operation

Elevated temperatures play a significant role in various failure and degradation modes of PV modules. Increased temperatures result in higher stresses due to thermal expansion and accelerate degradation rates. For every 10°C rise in temperature, degradation rates can double.

Determining Operating Temperature

The operating temperature of a PV module is influenced by the balance between heat generation within the module, heat dissipation to the surroundings, and the ambient temperature. Factors such as irradiance, operating conditions, optical properties of the module and solar cells, and cell packing density all contribute to heat generation. Heat dissipation occurs through conduction, convection, and radiation, which are influenced by the thermal resistance of materials, emissive properties of the module, and ambient conditions like wind speed.

Understanding these factors is crucial in optimizing the design and performance of PV modules to ensure efficient operation and longevity.

Source: Maysun Solar