If the heat insulation mica board is used in the blower, how much can the shell temperature be lowered?
If you don't know the value of it, and the range is not big, suggest you make a test: in the dryer duct in the section of mica plate drill a measuring head with the thermometer as big hole to the measuring head inserted into the thermometer attached to the mica plate, start the fan and electric heat, two minutes temperature stability and that the mica plate with the actual temperature, and then the thermometer head on the blower outlet quantity in air temperature, two numerical subtraction is what your the mica plate can be separated much lower temperature.
You really can't answer that question.
The thickness, and the mica plate heat source heat power, second air flow has a direct relationship, which is the first to determine the air temperature, the establishment of a temperature field is assumed, then the heat conduction through several layers of what material thick what thermal conductivity, we can find the approximate value of cooling.
