The heat dissipation method of the photovoltaic inverter and the matters needing attention.
Photovoltaic inverter is the core equipment of photovoltaic systems. Its main function is to convert the DC generated by photovoltaic components into AC that meets the requirements of the grid.
As an electric electronic device, inverters, like all electronic products, face temperature challenges. Up to 55% of all electronic product failure cases are caused by temperature. The electronic components inside the inverter are also very sensitive to temperature. According to the 10-degree rule of reliability theory, from room temperature, every 10 degrees rises, the service life is halved, so the heat dissipation design of the inverter is very important.
The inverter heat dissipation system mainly includes radiators, cooling fans, thermal conductive silicone grease and other materials. At present, there are two main ways to dissipate heat in the inverter: one is natural cooling, and the other is forced air cooling.
Natural cooling
Natural cooling refers to the realization of local heating devices dissipating heat to the surrounding environment without using any external auxiliary energy to achieve the purpose of temperature control. This usually includes three main heat transfer methods: heat conduction, convection and radiation, among which convection is mainly natural convection.
Natural heat dissipation or cooling is often suitable for low-power devices and components with low temperature control requirements and low heat flow density of devices, as well as sealed or densely assembled devices that are not suitable for other cooling technologies.
Forced air cooling
Forced air cooling is mainly a method to force the air flow around the device, such as fans, so as to take away the heat emitted by the device.
This method is a simple and effective heat dissipation method. If the space between the components in the component is suitable for air flow or the installation of local radiators, try to use this cooling method. This method of improving the forced convective heat transfer capacity increases the heat dissipation area and generates a relatively large forced convection heat transfer coefficient on the heat dissipation surface. Increasing the heat dissipation area on the surface of the radiator to enhance the heat dissipation of electronic components has been widely used in practical engineering.
You need to pay attention to the heat dissipation when installing the inverter.
1. The inverter itself is a heating source. All heat should be emitted in time and cannot be placed in a closed space, otherwise the temperature will rise higher and higher.
2. The inverter should be placed in an air circulation space and try to avoid direct sunlight.
3. When multiple inverters are installed together, in order to avoid mutual influence, there should be enough distance between the inverter and the inverter.
