KYOTO ELECTRONICS MANUFACTURING CO., LTD.

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Standard Heat Flow Occurrence Device

Standard Heat Flow Occurrence Device

The speed of heat flow (W/m2) can be found from the accurate occurring heat amount and radiation surface area, which are found from the voltage and current given by the main heater.

To prevent the invasion or loss of heat from sources other than the radiating surface, complete insulation is realized by monitoring the heat flow and heating with a backup heater, thereby guaranteeing the radiation surface.

For example, if a heat flow sensor is placed on a standard heat flow surface of 100W/m2 , if the heat flow sensor output is 2mV,

Where Q=α・ΔT
100W/m2=α・2mV
α=50W/m2/mV (sensor constant)

When measurement is made with the constant of this sensor,

Where ΔT=10mV
Q=α・ΔT=500W/m2

Heat flow sensor calibration

As previously stated, calibration is performed by the standard heat flow device, finding sensor constant α.

Actually, the sensor constant has the heat flow proportion value A and shift value B, and further, value B is a function of temperature.

At KEM, we attach the A constant and B constant values for each sensor with a managed standard heat flow occurrence device installed in a constant-temperature room.