METHOD OF MEASUREMENT thermal conductivity and thermal resistance of building structures

摘要

FIELD: instrumentation.;SUBSTANCE: invention relates to thermal non-destructive control and can be used for determination of thermal resistance and heat conductivity of construction structures. In compliance with this process, heat insulated heaters 2, 3 are placed on sides of construction structure 1. Heaters 8, 9 and thermal stabilisation systems 10, 11 structure 1 sides are temperature stabilised at temperatures T₁ and T₂ for time τ. Time τ is defined by the formula τ=4·10⁵·h², where h is structure thickness. Time τ elapsed, heat flow transducers 6 and 7 measure heat flows q₁ and q₂ through construction structure. Then, structure material heat conductivity λ is defined by the formula $\lambda =\frac{\left(q_1+q_2\right)\cdot h}{2\cdot \left(T_1-T_2\right)}\left(1\right)$, while heat resistance R is determined from $R=\frac{2\cdot \left(T_1-T_2\right)}{q_1+q_2}\left(2\right)$.;EFFECT: higher accuracy of measurements.;5 dwg