METHOD OF MEASURING THE COEFFICIENT OF HEAT TRANSFER OF SANDWICH PANELS WITH REFLECTIVE LAYER Russian patent published in 2019 - IPC G01N25/18 

FIELD: measurement technology.

SUBSTANCE: invention relates to the field of thermal measurements, in particular to the measurement of the heat transfer coefficient of heat insulating sandwich panels with a reflective layer. Method is proposed for measuring the heat transfer coefficient, which includes a closed volume with a removable lid, having a surface area inside and outside Si and Se, respectively, made of panels of the material under study, with a heater, fans and air temperature sensors located inside, with subsequent air heating in volume to the equilibrium temperature Ti by supplying stabilized power W to the heater until thermal equilibrium is reached due to heat exchange of air inside the volume through its walls with ambient air, which temperature Te is maintained at a constant level throughout the entire measurement cycle, with the subsequent calculation of the heat transfer coefficient of a closed volume using the formula K=W/S·ΔT. Moreover, the measurement of the coefficient of heat transfer is carried out in two stages. First stage is the measurement of the heat transfer coefficient K1 of the test measurement volume with a lid made of a material that does not necessarily coincide with the material under study. At the second stage, the lid of the measuring volume is replaced with the material under study, whose heat transfer coefficient K is to be determined, and the heat transfer coefficient K2 of the test measurement volume with the lid of the material under study is measured again. Heat transfer coefficient K is calculated by the formula K=K2·n-K1·(n-1), where n is a number indicating how much of the surface area of the measuring volume is replaced with the material under study.

EFFECT: increasing the information content of the data obtained by ensuring the measurement of the heat transfer coefficient of single sandwich panels, including panels with a reflective layer and panels with a non-planar surface.

1 cl, 4 dwg