FIELD: physics.
SUBSTANCE: when realising the method, one of the surfaces of the enclosure is heated by a heater which forms a zone of uniform heating; temperature of the heated and opposite surface of the enclosure (at the centre of the heating zone) is measured; thermal flux density on the surface of the enclosure (at the centre of the heating zone) is measured. Temperature and thermal flux density are additionally measured on the surface of the enclosure opposite the heated surface, at a distance of not less than two maximum linear dimensions of the heating zone from the centre of the heating zone. Measurement of temperature and thermal flux density on the heated and opposite surfaces of the enclosure at the centre of the heating zone is carried out at a moment in time when, on the surface opposite the heated surface, the difference between the temperature at the centre of the heating zone and the additionally measured temperature, as well as the difference between thermal flux density at the centre of the heating zone and the additionally measured density exceed sensitivity threshold values of corresponding measuring devices, and heat-transfer resistance of the enclosure is determined from a formula with corresponding compensation factors.
EFFECT: shorter duration of the procedure for measuring heat-transfer resistance of building enclosures with small difference in temperature on different sides of the enclosure.
3 dwg, 1 tbl
