Method for liquids such as refrigerants, oils, heat transfer fluids and aqueous solutions; measurement range: -90 °C to 450 °C (DSC measurements) and -20 °C to 120 °C (thermal conductivity).

Precise thermophysical characterization of fluids – enables the reliable determination of thermal conductivity and thermophysical properties even under realistic temperature and pressure conditions.

The determination of thermal conductivity is carried out using a measuring cell based on the steady-state concentric cylinder gap method. The fluid under investigation is located in an annular gap between a heated inner cylinder and a concentrically arranged outer body. By applying a defined heating power, a steady-state heat flow is established, and the temperature difference within the fluid is measured using precise Pt100 resistance thermometers. Measurements can be conducted at pressures of up to 10 bar.

Using dynamic differential calorimeters µDSC 7 evo (Setaram) and DSC Q200 (TA Instruments), heat flows are measured as a function of temperature in order to analyze characteristic material properties such as specific heat capacity, phase transitions (melting, crystallization), as well as reaction and decomposition enthalpies. Upon request, absorption enthalpies of gases in gas storage materials (e.g., zeolites) can also be determined. In the temperature range from -40 °C to 90 °C, measurements at pressures of up to 100 bar are possible; outside this temperature range, measurements at elevated pressures (> 1 bar) can also be performed upon request.