Calibration of First Testing Facility Using the Calibration Bypass

The KONTAS-C_p facility consists of a bypass with electric heating, temperature difference measurement and a Coriolis mass flow sensors to measure the specific thermal heat capacity (C_p) of the heat transfer fluid (HTF). During the SFERA-II project, the measurement accuracy of the cp measurement is enhanced and an additional Coriolis mass flow sensor is included. This further mass flow rate sensor enables the recalibration of already installed mass flow sensors in a testing facility. The calibration bypass is portable and can be coupled to practically any test facility using thermal oil. Among others, mass flow and specific heat capacity are key measurands to carry out energy balance studies and efficiency measurements in thermal collector assessments.
This deliverable describes the integration of the KONTAS-C_p measurement bypass into the KONTAS facility. This measure aims at increasing the overall measurement accuracy of KONTAS by accurately quantifying the specific heat capacity of used TF. Secondly, the inline mass flow measuring devices (Coriolis sensor) permanently installed in the facility can be cross checked with a device of the same accuracy in the bypass. The C_p measurement activity incorporated a detailed examination of influencing heat losses and other measurement uncertainties. In this deliverable, heat capacity results measured with the KONTAS-C_p bypass in comparison to lab measurement results and manufacturer dater are presented.