METHOD FOR DETERMINING LOSSES OF OIL AND OIL PRODUCTS IN RESULT OF EVAPORATION AT STORAGE AND TRANSPORTATION Russian patent published in 2015 - IPC G01L11/00 

FIELD: oil and gas industry.

SUBSTANCE: volume of losses of oil and oil products in result of hydrocarbons evaporation and change of a vapour-air mixture thermodynamic condition in the process of out- and in-breathing is defined as per the following formulae:

or where V_GS is the volume of a gas space in the tank, m³; C_0M, C_1M is the mass concentration of hydrocarbons in vapours before and upon breathing, kg/m³; C_0V, C_1V is the mass concentration of the hydrocarbons in the vapours before and upon breathing, volume ratio; R₀ is the universal gas constant, J/(mol·K); Mv is the molecular weight of the hydrocarbon vapours, kg/mol; P_a is the atmosphere pressure, kPa; T₀, T₁ is the temperature of the hydrocarbon vapours before and upon breathing, K.

EFFECT: improved accuracy for the determination of oil and oil product losses at storage and transportation, expanded functionality.