Dominion Cove Point LNG, LP

Original Volume No. 1

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Effective Date: 08/18/2003, Docket: RP01-217-003, Status: Effective

First Revised Sheet No. 235 First Revised Sheet No. 235 : Effective

Superseding: Original Sheet No. 235

GENERAL TERMS AND CONDITIONS

(Continued)

 

8. NATURAL GAS QUALITY (Continued)

 

(j) (v) Calculation of Interchangeability Indexes

 

b. Compressibility Used in the Following Interchangeability Calculations

 

The following table, titled Interchangeability Compressibility Calculation Coefficients, B(j,k), lists the coefficients used in the

calculation of compressibility for the following interchangeability calculations.

 

INTERCHANGEABILITY COMPRESSIBILITY CALCULATION COEFFICIENTS, B(j,k)

 

k th Entry ---

1 2 3 4 5 6 7 8 9 10

j th

Entry Symbol CH4 C2H6 C3H8 iC4H10 nC4H10 iC5H12 nC5H12 N2 O2 CO2

----- ------ ------- ------- ------- ------- ------- ------- ------- ------- ------- -------

1 CH4 (0.135) (0.281) (0.425) (0.457) (0.560) (0.632) (0.675) (0.060) (0.052) (0.181)

2 C2H6 (0.281) (0.569) (0.833) (1.005) (1.106) (1.293) (1.379) (0.152) (0.124) (0.385)

3 C3H8 (0.425) (0.833) (1.183) (1.522) (1.666) (1.953) (2.068) (0.237) (0.201) (0.618)

4 iC4H10 (0.457) (1.005) (1.522) (2.097) (1.982) (2.556) (2.614) (0.213) (0.270) (0.819)

5 nC4H10 (0.560) (1.106) (1.666) (1.982) (2.289) (2.671) (2.915) (0.250) (0.293) (0.862)

6 iC5H12 (0.632) (1.293) (1.953) (2.556) (2.671) (3.375) (3.504) (0.326) (0.391) (1.063)

7 nC5H12 (0.675) (1.379) (2.068) (2.614) (2.915) (3.504) (3.978) (0.280) (0.474) (1.091)

8 N2 (0.060) (0.152) (0.237) (0.213) (0.250) (0.326) (0.280) (0.019) (0.037) (0.144)

9 O2 (0.052) (0.124) (0.201) (0.270) (0.293) (0.391) (0.474) (0.037) (0.053) (0.118)

10 CO2 (0.181) (0.385) (0.618) (0.819) (0.862) (1.063) (1.091) (0.144) (0.118) (0.388)

 

 

1. The listed constants are for use in the following interchangeability compressibility calculations only. The listed constants are

not referenced in any other section of the tariff.

 

2. Compressibility Used in the Following Interchangeability Calculations, (Z)

 

B = (SUM Over j) (SUM Over k) [ x(j) * x(k) * B(j,k) ]

 

Z = 1 + ((B/1000) * 14.73)