METHOD AND APPARATUS FOR FORMING FROST WORK Russian patent published in 2011 - IPC B44F9/00 B05D5/06 

FIELD: physics.

SUBSTANCE: method of forming frost work involves feeding water into an airtight housing, feeding hydrate-forming gas under pressure, maintaining given pressure and temperature conditions for the entire duration of formation of gas hydrate deposits. Hydrate-forming gas is fed at pressure a little higher than equilibrium, needed for formation of gas hydrate compounds at given temperature of the surface of the walls of the housing. Given temperature and pressure conditions are maintained for the entire duration of formation of gas hydrate deposits. Water is applied on the translucent walls of the housing by spraying. Maintenance of temperature and pressure conditions continues for the entire duration of retention of the frost work on the walls in form of gas hydrate deposits. The frost work can be altered via dissociation of the formed gas hydrate deposits by reducing pressure of the hydrate-forming gas to a value below the equilibrium value. Frost work is formed once more.

EFFECT: simple, fast programmed change of frost work and display of frost work at any temperature.

2 cl, 4 dwg