● Temperature inside the box:
The temperature inside the photovoltaic ultraviolet aging test chamber should be controlled according to the specified test procedure during the irradiation or shutdown stage. The relevant specifications should specify the temperature level that needs to be reached during the irradiation stage according to the intended use of the equipment or components.
● Surface contamination:
Dust and other surface pollutants will significantly alter the absorption characteristics of the surface of the illuminated object, ensuring the cleanliness of the sample during testing;
● Air flow velocity:
1). The probability of strong solar radiation and zero wind speed occurring in the natural environment is extremely low. Therefore, when evaluating the impact of different wind speeds on equipment or components and other samples, specific requirements should be specified;
2). The airflow velocity near the surface of the photovoltaic ultraviolet aging test chamber not only affects the temperature rise of the sample, but also causes significant errors in the open type thermoelectric stack for monitoring radiation intensity.
● Various materials:
The photochemical degradation effects of coatings and other substances vary greatly under different humidity conditions, and the requirements for humidity conditions in UV aging test chambers are also different. The specific humidity conditions are clearly specified by relevant specifications.
● Ozone and other polluting gases:
The ozone generated by the photovoltaic ultraviolet aging test box under the short wave ultraviolet radiation of the light source can affect the degradation process of certain materials due to ozone and other pollutants. Unless otherwise specified by relevant regulations, these harmful gases should be discharged from the box.
● Support and its installation:
The thermal characteristics and installation methods of various supports can have a serious impact on the temperature rise of the test samples, and should be fully considered to make their heat transfer performance representative of typical actual usage situations.
Post time: Dec-21-2023