This apparatus is used for the determination of the isobaric heat capacity and Joule-Thomson coefficient of reservoir fluids and related systems. It is equipped with high pressure cells, which can operate up to 300°C and pressures up to 150 MPa.
This technique is a Calvet type differential heat-flux calorimeter C80 from Setaram, which can operate in both isothermal and differential scanning calorimeter modes.
This calorimeter has a Calvet calorimetric detector, in which the sample and reference cells are surrounded completely by a set of 9 concentric rings, each of them containing 38 thermocouples, which allows measuring the total heat transferred by conduction, convection and radiation.
The scanning rate can be programmed from 0.001 to 2 K∙min-1. The conversion of the differential calorimeter detector thermopile signal (E / V) into energy ( / W) is performed through an electric calibration by Joule effect from ambient temperature to 300°C. Both the reference and the measurement cells are located in the calorimeter block and can withstand a maximum pressure of 150 MPa.
Publications:
Teresa Regueira, Farhad Varzandeh, Erling H. Stenby, Wei Yan, "Heat capacity and Joule-Thomson coefficient of selected n-alkanes at 0.1 and 10 MPa in broad temperature ranges", J. Chem.Thermodyn., 2017, 111, 250-264