DETERMINATION OF LOSSES OF OIL OR OIL PRODUCTS FROM EVAPORATION IN EMISSIONS OF STEAM-AIR MIX AT FILLING IN TRANSPORTATION TANKS Russian patent published in 2015 - IPC G01N33/22 G01N33/26 

FIELD: oil-and-gas industry.

SUBSTANCE: hydrocarbons concentration is measured in vapour-air mix flowing from filler neck as well as time interval from fill in start to initial occurrence of hydrocarbons in said mix, said concentration being taken as the minimum magnitude. Time interval when hydrocarbons concentration reaches maximum magnitude and moment when maximum level in the tank is reached are measured. Bulk of losses of oil or oil products is determined by the formula: $$M_{"пп"}=V_{"ц"}\left[\frac{\left(t_{"ц"}-t_{Cmax}\right)C_{max}}{t_{"ц"}}+\frac{\left(t_{Cmax}-t_{Cmin}\right)\left(C_{max}+C_{min}\right)}{2t_{Cmax}}\right],$$ where M_"пп" is bulk of losses caused by evaporation in vapour-air mix emissions, kg; V_"ц" is tank volume, m³; t_"ц" is time interval from fill in start to maximum fill in level, min; C_max is maximum concentration of hydrocarbons in said mix, kg/m³; C_min is minimum concentration of hydrocarbons in said mix, kg/m³; t_Cmax is time interval from fill in start to occurrence of vapours with concentration C_max, min; t_Cmin is time interval from fill in start to occurrence of vapour with concentration C_min, min.

EFFECT: lower labour input, higher accuracy of loss determination.

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