Heat flux meter is an instrument for measuring heat flow

Heat flux meter is an instrument for measuring heat flow. Heat flux is the heat flowing through the unit area in unit time, which can also be understood as the rate of heat passing through the unit area. The unit of heat flux is w / M. in order to measure the heat radiation intensity, heat convection intensity, heat conduction intensity or total heat transfer rate of a certain part, a heat flux meter is often used.
As a heat flux measurement instrument, the accuracy of the measurement results of the heat flowmeter is the key to its reliability. After using the thermal flowmeter probe for a period of time, it shall be calibrated. In addition, when using the heat flux meter probe, the probe is often stuck on the surface of the measured object or embedded in the interior of the measured object, affecting the original heat transfer of the measured object. In order to accurately estimate this effect, it is necessary to understand the thermal resistance and other properties of the heat flux probe itself, which needs to be measured in the calibration process. The commonly used calibration methods are plate direct method, plate comparison method and unidirectional plate method.
The following problems should be paid attention to in the arrangement and use of heat flux meter.
(1) When choosing heat flux timing, because there are many kinds of heat flux sensor technologies, each has its own different uses and use environmental conditions, and because they are calibrated under different economic conditions, if they are not selected, they will bring great measurement system errors.
(2) When using heat flux timing, the measurement range, temperature range, time constant, size, internal resistance and accuracy of heat flux meter should be reasonably selected.
(3) When using heat flux timing, try to make its surface equal to or close to the emission rate of the tested surface, so as to reduce the measurement error caused by different emission rates.
(4) When installing the sensor, ensure good contact and minimize the air gap, otherwise measurement error will occur.
(5) The installation of heat flux meter shall minimize the interference of other heat flux fields, such as the interference of measured heat flux technical equipment, nearby heat pipeline works and other heat equipment.
(6) For the heat flux meter used for equipment resource management of the monitoring system, the long-term development stability, corrosion resistance, vibration resistance, high temperature and high humidity resistance shall be considered.