Earth’s Cryosphere, 2019, Vol. XXIII, No. 6, p. 39-47
RESEARCH OF TWO-PHASE FLOWS OF CARBON DIOXIDE DURING THE COOLING OF THE GROUND BY HORIZONTAL EVAPORATOR SYSTEM
V.P. Melnikov1–3, G.V. Anikin4, A.A. Ishkov4,5, I.E. Andrianov4
1 Tyumen Scientific Centre, SB RAS, 86, Malygina str., Tyumen, 625026, Russia
2 Tyumen State University, 6, Volodarskogo str., Tyumen, 625003, Russia
3 Tyumen Industrial University, 38, Volodarskogo str., Tyumen, 625000, Russia
4 Earth Cryosphere Institute, Tyumen Scientific Centre SB RAS, 86, Malygina str., Tyumen, 625026, Russia; anikin@ikz.ru
5 Lukoil Engineering LLC, KogalymNIPIneft, 143A, Respubliki str., Tyumen, 625000, Russia; ishkovAA@tmn.lukoil.com
An experimental study of the functioning of a two-phase carbon dioxide flow in a seasonal cooling device was carried out. This device is designed to freeze the ground under structures built on the permafrost. It is demonstrated that the difference between the temperature of the condenser and the temperature of the evaporator is 0.46 °C, which indicates a small internal thermal resistance of the installation. The ultrasonic flow meter was used to measure the average rate of the fluid exiting the condenser. The temperature dependence of the condenser and evaporator on time was implemented to calculate the amount of steam in the installation from the beginning of its start-up to the exit to the steady state. By comparing the experimental data with the data of mathematical modeling, we determined the main parameters of the two-phase carbon dioxide flow in each section of the evaporator pipe.
Two-phase flow, carbon dioxide, horizontal evaporator system, simulation