DETERMINATION OF THERMAL CONDUCTIVITY OF THE INSULATION MATERIALS USING NUMERICAL CALCULATION OF THE PRESSURE INCREASE

Abstract

In the paper is presented the possibility of determination thermal conductivity for the insulation materials, which are used in the tanks for liquid carbon dioxide, in situ. For this purpose, was developed the mathematical model for description of the pressure changes in function of the ambient conditions and storage time. The application software was developed also for computation of the pressure increase two-phase mixture in tank, relating to the time, and the thermal conductivity determination of the insulating material. Verification of the program was done in function of exploitation incoming data. The numerical simulations of the pressure increase are done for various degrease of tank compliance. The influence of the ambient conditions is expressed by the heat transfer fluid in tank and the environment. Used incoming data are the temperature profile and sun heat flux characteristic for Serbia, in summer time.