WERKWIJZE VOOR HET METEN VAN DOORSTROMENDE HOE- VEELHEDEN.

摘要

Measuring the mass flow of a liquid gas pumped from a storage tank to a consumer through a measuring station, includes the steps of throttling the flow of the liquid gas by a throttle in the measuring station; measuring the flow of the liquid gas according to the relationship WHEREIN M is the flow rate, C and m are instrument constants evaluated by calibration, DELTA p is the head difference and rho is the liquid density; maintaining the delivery pressure of the liquid gas higher than its vapor pressure plus the maximum momentary head difference at the throttle; and compensating for the temperature-caused liquid density variation, including the steps of measuring the temperature of the liquid gas by a semiconductor having a resistance/temperature curve and adapting the curve to the density/temperature curve of the liquid gas.