Calculate the vapour and liquid mole fractions if the pipeline temperature in Example 1 drops to 0°C

Step 1: Reset the "Initial Conditions":

• Select "Temperature-Pressure Flash", and set "Temperature" to 0°C and "Pressure" to 5600 kPa.

Step 2: "Execute Flash".

Step 3: From the calculated "Data", read the vapour and liquid mole fractions as 0.980 and 0.020 respectively.

Step 4: Now find "Vapour and Liquid Flowrates" in the pipeline for an assumed gas flow rate of 5 MMSCFD by pressing on the "Rate Calc" button and entering 5 MMSCFD as the feed rate.