Heat flux measurement apparatus and heat flux measurement method

Abstract

A heat flux measurement apparatusincludes a first measurement unit, a second measurement unit, and heat flux calculation units. The first measurement unitmeasures a temperature difference between a first measurement location and a second measurement location that is lower in temperature than the first measurement location, using a thermocouple. The second measurement unitmeasures a temperature difference between a third measurement location that can be assumed to be isothermal with the first measurement location and a fourth measurement location that can be assumed to be isothermal with the second measurement location, using a thermocoupledifferent in time constant from the thermocouple. The heat flux calculation unitsuse measured temperature differences respectively acquired from thermal electromotive forces of the thermocouplesof the measurement units, and time differential values of the actual measured temperature differences of the respective measurement unitsto detect a time constant of the thermocoupleof at least one of the measurement units, calculate a compensated temperature difference by compensating a response lag of the actual measured temperature difference by the detected time constant, and calculate a heat flux based on the compensated temperature difference.