METHOD FOR DETERMINING LOSSES OIL FROM THE FUMES IN SMALL respiration Reser Voir

摘要

A method of quantitative assessment of losses of oil and petroleum products from the evaporation tank at small breaths equipped breather, comprising a change control of excess pressure in the reservoir, comprising the following steps: registering the values ​​of the overpressure in the reservoir, atmospheric pressure, mean values ​​of the gas reservoir space temperature; determine the change in mass concentration of hydrocarbons in the gas space of the tank by the relationship: where P, P values ​​of absolute pressure in the reservoir, defined by the relationship: P = P + P [Pa] T, T- average gas reservoir space temperature, K; ΔR- atmospheric pressure gain determined depending on: ΔP = P-P [Pa]; or if excessive pressure values ​​among groups in the tank is below the threshold value of the breathing valve on the vacuum, the change in the mass concentration of hydrocarbons in the gas reservoir space is determined by the relationship: where n - the number of positives on breather valve vacuum ΔR- pressure increase during actuation i-vent valve to the vacuum, Pa, average value T of the tank gas space temperatures during tripping vent valve to the vacuum, K; then determine mass loss from evaporation during the displacement of the gas phase enriched vapor hydrocarbons through the relationship: where s - mass concentration of hydrocarbons in the gas space of the tank at the opening of respiratory second valve defined by the relationship: somewhere initial mass concentration of hydrocarbons in the gas space of the tank, kg / m; for