1. Increasing the gas inlet flow rate of the parking heater can enhance the convection heat exchange of the parking heater, and reduce the surface temperature of the electric heating element in the parking heater, which is not only conducive to prolonging the service life of the electric heating element of the parking heater , And reduce the heat loss of the parking electric heater, so the power of the parking heat exchanger has improved, but if the speed is too high, the pressure loss will increase sharply, which will not be conducive to the improvement of the heating power. 
2. If other conditions remain unchanged and the external load is changed, the wall temperature of the electric heating element in the parking heater will change linearly. If the external load increases, the wall temperature of the electric heating element will increase, which will decrease the temperature of the parking heater. The service life of the electric heating element, but if the external load is too small and the wall temperature is too low, the power of the parking heater heat exchanger drops again, so the selection of the external load of the electric heating element in the parking heater is more important.
3. When the final parking temperature T2 in the parking heater increases, due to the increase in parking viscosity, the gas Reynolds number decreases, which reduces the convection heat transfer intensity, and the surface temperature of the electric heating element in the parking heater rises at the same time, causing loss of heat dissipation. Add and then drop the power of the heat exchanger. When T2 progresses too much, the surface temperature of the electric heating element will also increase, making the general electric heating element unacceptable. Therefore, the addition of T2 is usually restricted by the heat resistance function of the electric heating element material in the parking heater.
