Authors

Main peculiarities of carbon dioxide solid phase formation

UDC 621.594

Main peculiarities of carbon dioxide solid phase formation

Danilov M.M. , Smirnov A. S.

Abstract
While analyzing carbon dioxide freeze out in turbo expansion machines understanding the kinetics of solid phase formation is of great importance. The influence of the carbon dioxide crystal regular multi-faceted shape on the process in question and the peculiarities of their formation when the flow is being supercooled should be taken into consideration. Seed crystal is being compared with carbon dioxide molecular crystal, its equilibrium shape being specified. Seed crystal size does not depend on the environment temperature and partial pressure of the carbon vapors (saturation temperature) greatly. It depends on the flow supercooling value to the greatest extent. The methods of carbon dioxide crystal energy specific surface area calculation and equilibrium crystals size calculation at different values of flow supercooling of have been proposed.

Keywords: freeze out, carbon dioxide, crystals, specific surface energy, surface tension, flow supercooling.

All references

1. Frenkel' Ya. I. Kinetic theory of liquids. – Leningrad: Nauka, 1975. 592 p.

2. Kozlova O. G. Growth and morphology of crystals. Moscow, 1980. 368 p.

3. Pimenova T.F. Production and application of an artificial ice, liquid and gaseous dioxide of carbon. Moscow, 1982. 208 p.

4. Altunin V.V. Heatphysical properties of dioxide of carbon. – Moscow: Izd-vo standartov, 1975. 546 p.

5. Kirillov I.I., Yablonik R.M. Theory bases vlazhnoparovykh of turbines.– Leningrad: Mashinostroenie, 1968. 264 p.

6. Vegener P.P., Mak L.M. Condensation in hyperacoustic and mechanics hypersonic wind tunnels / Problem: Collection of articles. Vol. 3. – Moscow: Izd-vo inostrannoi literatury, 1961. p. 254-367.

7. Dranova Zh.I., D'yachenko A.M., Mikhailovskii I.M. Research of dependence of the free surface energy from the microchip and temperature size. Collection of reports of the IV conference on surface forces. – Moscow: Nauka, 1972. p. 59-62.

8. Adamson A. Physical chemistry of surfaces. – Moscow: Mir, 1979. 368 p.

9. Volkova E.M. To a thermodynamic assessment of surface tension of solid bodies. Interuniversity subject collection. 1979. p. 40-45.

10. Benson G.,Yun K. Surface energy and surface tension of crystalline solids / the Phase boundary gas – a solid body: Collection of articles. – Moscow: Mir, 1970. p. 72-79.

Read the full article