Features of calculation of CNG tanks unloading regeemes directly into the existing pipeline system

Abstract

In this paper, calculations of the regime of discharging CNG vehicles were made. The basic flow
sheet discharging was presented, which includes the coastal communication, connectivity to CNG ship,
unloading station and buffer pipeline, which allows supply gas to the existing gas transportation system.
The work carried out mathematical modeling discharging modes using commonly known dependencies of
gas dynamics. The process of discharging takes place in two stages playing 2 ÷ 2,5 hours first and 10 ÷
11 the second phase. Duration of the process of discharging including all operations call and departure
the vessel, mooring, connection and disconnection of communication reaches 24 hours, subject to the
technical and economic calculations. In the process of discharging the vessel, there are three phases of
nonstationary regimes of the gas phase with duration of non-stationary in 30-35 minutes each.