Heat flux measuring systems

Building thermal resistance measuring system with two measurement locations

by Hukx

View Hukx on TEKEN44

TRSYS20 is a high-accuracy measuring system used in determining the in-situ thermal resistance (R-value), thermal conductance (Λ-value), and thermal transmittance (U-value) of building envelope components. The system is mostly used for measurements according to standard practices of ISO 9869, ASTM C1046 and ASTM C1155. TRSYS20 is equipped with high-resolution electronics, two heat flux sensors of model HFP01 as well as two pairs of matched thermocouples for differential temperature measurements. The high-sensitivity heat flux sensors combined with the robust, high-resolution electronics ensure that TRSYS20 continues making meaningful measurements when other systems no longer perform; in particular at very low heat fluxes and low temperature differences across the wall. The matched thermocouple pairs allow measurement of temperature differences with an uncertainty better than 0.1 °C over the entire temperature range. Two measurement locations provide redundancy allowing the user to verify that the measurement results are representative for the building envelope component.