Gas flows from a well at 1440 psi and 60°F at a flowrate of 1.0 MMSCF/D. The gas is heated in a line heater before flowing to the pipeline. Calculate the heat duty of the line heater.

Step 1: Set the "Initial Conditions":

• Select "Temperature-Pressure Flash".

Step 2: Enter "Input Stream":

• Add "Components" and enter "mole %" as in Example 1.

Step 3: Set "Temperature" to 60°F and "Pressure" to 1453 psia. "Execute Flash". From the calculated "Data", read the "Enthalpy" of -1751.409 Btu/lb.

Step 4: Reset "Temperature" to 110°F and "Pressure" to 1453 psia. "Execute Flash". From the calculated "Data", read the "Enthalpy" of -1713.165 Btu/lb.

Step 5: Calculate the required heater coil duty.