GlycolInjectionThis spreadsheet calculates the minimum amount of required inhibitor usage.

Input Data:

Gas flow rate: 10 MMscfd

0.7 air = 1

900 psia

90

64

40

48 lb/MMscf

9.6 lb/MMscf

Inhibitor data: Used (1=Yes; 0=No)? Density:EG 1 75% 65% 9.08 ppg

DEG 0 75% 65% 9.08 ppg

Concentration of inhibitor in its commercial solution: 75 Wt %

Intermediate Calculations:

38.4 lb/MMscf

62

9.08 ppg

4000

24

65 Wt %

75 Wt %Inhibitor requirement based on Hammerschmidt's method:

= 27.11 Wt % -1

Inlet concentration to be used: 75 Wt % 1

= 187.20 lb/MMscf

Result:

Required volume of commercial inhibitor solution: 249.6 lb/MMscfRequired weight of commercial inhibitor solution: 27.49 gal/MMscfHourly inhibitor injection rate: 11.45 gal/hour

Gas specific gravity (gg):

Minimum pressure (pm):

Inlet gas temperature (ti): oF

Hydrate temperature pm: oF

Operating temperature (to): oF

Water content at ti and pm:

Water content at to and pm:

Win Wout

Water to be removed from gas (wG):

Molecular weight of inhibitor (MW)inh:

Density of inhibitor (rinh):

Hammerschmidt constant for inhibitor (KH):

Depression of hydrate formation temperature (Dth): oF

Wout for the selected inhibitor:

Win for the selected inhibitor:

Instructions:1) Update input data in blue;2) View result.

W h=(MW )inh Δth

(MW )inh Δth+K H×100

I 100=W G

(100W out

−100W in

)

Daily inhibitor injection rate: 274.89 gal/day