The heat dissipation method of the inverter
1.Natural heat dissipation
The cooling method of natural heat dissipation of solar inverter refers to the purpose of realizing the temperature control of the local heating device to the surrounding environment without using any external auxiliary energy. It usually includes three main heat transfer modes, heat conduction, convection and radiation, in which the convection is dominated by natural convection. Natural heat dissipation or cooling is often applied to low power devices and components with low temperature control and heat flow density, and sealed or densely packed devices are not suitable for other cooling technologies. At present, the single-phase inverter and the three-phase inverter under 30kW, most of the manufacturers can achieve natural heat dissipation, and a few three phase inverters of 100kW can also achieve natural heat dissipation.
The cooling method of natural heat dissipation of solar inverter refers to the purpose of realizing the temperature control of the local heating device to the surrounding environment without using any external auxiliary energy. It usually includes three main heat transfer modes, heat conduction, convection and radiation, in which the convection is dominated by natural convection. Natural heat dissipation or cooling is often applied to low power devices and components with low temperature control and heat flow density, and sealed or densely packed devices are not suitable for other cooling technologies. At present, the single-phase inverter and the three-phase inverter under 30kW, most of the manufacturers can achieve natural heat dissipation, and a few three phase inverters of 100kW can also achieve natural heat dissipation.
2.Forced heat dissipation
The cooling method of forced cooling is mainly by means of fans and other forced devices around the air flow, thereby removing the heat emitted from the device. This method is a simple and effective heat dissipation method. If the space between components is suitable for air flow or suitable for installation of local radiator, this cooling method can be used as much as possible. The method of enhancing the forced convection heat transfer capacity increases the heat dissipation area and produces a relatively large forced convection heat transfer coefficient on the cooling surface. Increasing the heat dissipation area of the radiator surface to enhance the heat dissipation of electronic components has been widely applied in practical engineering. In engineering, the fin is used to expand the heat dissipation area of the radiator surface to achieve the purpose of enhancing heat transfer. The choice of radiator material is directly related to its heat dissipation performance. At present, the material of the radiator is mainly made of copper or aluminum, and the expanded heat exchange surface is made by folding fins / punching thin fins.
The cooling method of forced cooling is mainly by means of fans and other forced devices around the air flow, thereby removing the heat emitted from the device. This method is a simple and effective heat dissipation method. If the space between components is suitable for air flow or suitable for installation of local radiator, this cooling method can be used as much as possible. The method of enhancing the forced convection heat transfer capacity increases the heat dissipation area and produces a relatively large forced convection heat transfer coefficient on the cooling surface. Increasing the heat dissipation area of the radiator surface to enhance the heat dissipation of electronic components has been widely applied in practical engineering. In engineering, the fin is used to expand the heat dissipation area of the radiator surface to achieve the purpose of enhancing heat transfer. The choice of radiator material is directly related to its heat dissipation performance. At present, the material of the radiator is mainly made of copper or aluminum, and the expanded heat exchange surface is made by folding fins / punching thin fins.
3.Comparison of two kinds of heat dissipation methods
Natural heat dissipation has no fans, low noise, but slow heat dissipation, and is generally used for small power inverters. Forced air cooling need to configure the fan, large noise, but fast heat dissipation, generally used in high-power inverters, in the middle power of the series of inverters, use both way. Through the comparison experiment of the heat dissipation capacity of the group series inverter, it is found that the group series inverter with 50kW power level using forced heat dissipation is better than the natural cooling method. The temperature rise of the key components, such as the capacitor and IGBT in the inverter, can be reduced by about 20℃, which can ensure the long life and high efficiency of the inverter. However, the temperature of the inverter with natural cooling mode increases and the life of the components decreases. Forced air cooling also has two kinds of high speed fans and medium speed fans. The use of high speed fans can reduce the volume and weight of the radiator, but it will increase the noise and the fan life is short. If the medium speed fan is used, the radiator is slightly larger. But when the power is low, the fan does not turn, and the fan runs at a low speed in the middle power. In fact, the full power operation time of the inverter is not much, so the fan’s life can be long.
Natural heat dissipation has no fans, low noise, but slow heat dissipation, and is generally used for small power inverters. Forced air cooling need to configure the fan, large noise, but fast heat dissipation, generally used in high-power inverters, in the middle power of the series of inverters, use both way. Through the comparison experiment of the heat dissipation capacity of the group series inverter, it is found that the group series inverter with 50kW power level using forced heat dissipation is better than the natural cooling method. The temperature rise of the key components, such as the capacitor and IGBT in the inverter, can be reduced by about 20℃, which can ensure the long life and high efficiency of the inverter. However, the temperature of the inverter with natural cooling mode increases and the life of the components decreases. Forced air cooling also has two kinds of high speed fans and medium speed fans. The use of high speed fans can reduce the volume and weight of the radiator, but it will increase the noise and the fan life is short. If the medium speed fan is used, the radiator is slightly larger. But when the power is low, the fan does not turn, and the fan runs at a low speed in the middle power. In fact, the full power operation time of the inverter is not much, so the fan’s life can be long.
REVO-E 3-5kW Hybrid Solar Energy Storage Inverters
1. PV and utility power take the load at same time ( can setting ).
2. Output power factor PF=1.0
3. On/Off grid with energy storage.
4. AC charging and AC output time setting.
5. Charging voltage and charging current timing.
6. External Wi-Fi device optional.
7. Connected with battery optional.
8. Wide PV input range 120-450VDC.
9. MAX PV Array Power 4500W.
2. Output power factor PF=1.0
3. On/Off grid with energy storage.
4. AC charging and AC output time setting.
5. Charging voltage and charging current timing.
6. External Wi-Fi device optional.
7. Connected with battery optional.
8. Wide PV input range 120-450VDC.
9. MAX PV Array Power 4500W.
评论
发表评论