Trade Settlement Flow Calculator

Trade Settlement Flow Calculator Trade Settlement Flow Calculator is designed to satisfy flow measurement in trade settlement. Its hardware structure is the same? X: The 6000 meter is exactly the same, but the special function of trade settlement is added in the software design. 7.5.2 Special function for trade settlement The small flow billing function shall be charged according to the 'lower limit charging flow' when the actual flow is less than the 'lower limit flow agreed value' according to the agreement between the supplier and the buyer. Therefore, in the menu of the flow calculator, there is one item written as 'lower limit flow rate agreement value', and the other item is written as 'lower limit charge flow rate'. Charged traffic' replaces actual traffic for accumulation. If the calculator is used for trade settlement flow measurement, but there is no such agreement between the supply and demand parties, or there is an agreement but not implemented for the time being, you can write both the 'lower limit flow rate agreed value' and 'lower limit charge flow rate' as 0 That's it. , 1. Steam stop judgment function The steam stop judgment function is specially designed for steam trade settlement. When the main steam valve is closed, the temperature of the fluid in the steam pipe behind the valve drops rapidly, and the fluid pressure then drops (take superheated steam as an example). The instrument uses these two parameters as the observation basis for whether to stop steam. There is a window in the instrument to write 'Steam stop temperature sign value' and another window writes 'Steam stop pressure sign value'. These two sign values ​​are determined by the supply and demand sides. When the main steam valve is closed, the measured steam temperature and pressure only need one If the value is lower than the sign value, the instrument will make a judgment of 'steam stopped'. At this time, regardless of the actual measured flow rate, the accumulation will be stopped, and the accumulation will not be carried out according to the 'lower limit charging flow'. If the two parties agree not to use this function , you can set the 'Temperature Flag Value' and 'Pressure Flag Value' in the corresponding window to be low enough, so low that it is impossible to reach the value under normal circumstances. Use the steam temperature and steam pressure in the pipeline to judge the steam stop , there must be a certain lag, because the pipeline has a certain volume, and the temperature and pressure drop need a process. If you want to speed up this process, you can open the purge valve behind the valve after the main steam valve is closed.