1. Increasing the gas inlet flow rate of the electric parking heater can enhance the convection heat exchange of the electric parking heater, and reduce the surface temperature of the electric heating element in the parking heater, which is not only conducive to extending the use of the electric heating element of the parking heater The service life of the electric parking heater is reduced, so the power of the parking heat exchanger increases, but if the speed is too high, the pressure will drop sharply, which will not be conducive to the advancement of the heating power.
2. When the final parking temperature T2 in the parking heater moves forward, due to the increase in parking viscosity and the decrease of the gas Reynolds number, the convection heat transfer intensity decreases, and the surface temperature of the electric heating element in the parking heater rises together, causing the heat dissipation to be lost. Increase and then decrease the power of the heat exchanger. When T2 advances too far, the surface temperature of the heating element will also increase, making the general heating element unacceptable. Therefore, the increase of T2 is generally restricted by the heat resistance function of the heating element material in the parking heater.
3. If other conditions remain unchanged and the surface load is changed, the wall temperature of the electric heating element in the electric parking heater will change linearly. If the surface load increases, the wall temperature of the electric heating element will increase, which will reduce the parking heater. The service life of the electric heating element, but if the surface load is too small and the wall temperature is too low, the power of the parking heater heat exchanger will drop. Therefore, the selection of the surface load of the electric heating element in the parking heater is more important.
