Unit Name: C·UNIT#1Location: North Zulch Compress

Load Step: 1

Clearance Indicated BrakeCyl % of Swept Power Power

End Volume (ihp) (bhp)

Stage: 1 Stage 1

1H 10 0 0

1C 10 111 117

2H 10 6 6

2C 10 113 119

Stage Totals: 229 241

Auxiliary PowerCompressor Total PowerThis is equivalent toRated driver load JoCurrent torque level is

Compressor Horsepower And Capacity ReportTXU Pipeline Service

TXULSPipeline

Model:Unit Mfr:

6M·2Worthington

Date:Serial No.:

Total; Loss(ihp)

Suction Disch.

Valve & Pass; Loss(ihp)

Suction Disch.

Calculated Capacity(mmscfd)

SVE* DVE**

Total Loss(%)

Suction Disch.Flow

Balance

Unload

0.22 1.12 0.22 1.12 0.20 1.02 2.22 2.23 0.998 52.5 57.1

Unload

3.56 0.72 3.56 0.72 3.15 0.63 2.33 2.31 1.010 51.5 54.9

3.79 1.84 3.79 1.84 1.65 0.80 Stage Capacity: 4.53 52.0 56.0

19 bhp at 900 RPM256 bhp and 4.53 mmscfd at 719 RPM321 bhp and 5.67 mmscfd at 900 RPM650 bhp at 900 RPM

49.3 % of rated load at rated speed.

1. Atmospheric Pressure = 14.7 psi a

2. Brake Power calculations are based on assumed mechanical efficiency of 0.950.

3. Capacity and Brake Power calculations are based on a speed of 719 rpm.

4. Compressor total Brake Power includes the derated auxiliary Brake Power.

5. Capacity calCUlations are based on the pressures, temperatures, and gas properties noted in Compressor Operating Conditions

and Gas Properties Report. Total Compressor Capacity is the least of all stage capacities.

6. Standard conditions for capacity calculations are 14.7 psia and 60.0 F.

7. Calculated capacities assume no slippage.

8. If Suction or Discharge Temperatures are not found, some calculations may not be available as indicated by a "••".

9. Calculated bhp/mmscfd = (Measured indicated power) I (Mechanical efficiency * Calculated capacity).

10. Theoretical bhp/mmscfd = (Theoretical indicated power) I (Overall efficiency * Theoretical capacity).

11. Theoretical capacity is calculated using the K ave, the ratio of specific heats (not the polytropic gas exponent).12. The overall efficiency (OE) is set to 0.850 in the geometry.

Setting overall efficiency (OE) = 1 results in an uncorrected theoretical bhp/mmscfd. Setting OE = ME should result in

a calculated bhp/mmscfd which is greater than the theoretical bhp/mmscfd. Setting OE to account for ME and the

compression efficiency allows direct comparison of theoretical bhp/mmscfd.

13. Two types of losses may be calculated. Total indicated losses are calculated from the terminal pressures. Valve and passage

losses (Valve & Pass) are calculated using nozzle pressure traces if collected.

The Valve & Pass losses will be the same as Total losses if nozzle data was not collected.

14. Marker Type: Encoder (ENC) and Trap Type: 9260.

15. Channel Resonance Correction (CRC) applied: None

16. Corrected VE applied, PS and PO values Corrected: None

SVE* • Capacity based on the suction volumetric efficiency.

DVE** • Capacity based on the discharge volumetric efficiency.

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C-UNIT#1North Zulch Compress

Model:Unit Mfr:

6M·2Worthington

Date:Serial No.:

i1echanical Efficiency, % 95 Marker Correction Angle, deg 135.7 Periods Collected (Pl) 11)verall Efficiency, % 85 Stroke, (ins) 6.000

It:mospheric Pressure, psi a 14.7 Speed, RPM 719 Specific Gravity 0.554

.oad Step 1 1st Stage Suction, psi 290.0 1st Stage Discharge, psi 780.0

Clr Rod ConRod Pressure Temp. Calc. Indicated Suction Disch. Dis T Rod~yl Stg Set Bore Diam Length Ps Pd Ts Td Compo Capacity Power Loss Loss Flow Delta Load SVE DVE

:nd (%) (ins) (Ins) (ins) (psi g) Ratio (mmscfd) (ihp) (ihp) (ihp) Balance (F) (%) (%) (%)

IH 1 10 7.500 N/A 16.250 292 292 86F 218F Unload ·0.2 4C

IC 1 10 7.500 2.500 16.250 304 820 86F 218F 2.62 2.22 110.7 0.2 1.1 1.00 5 38T 74 35

!H 1 10 7.500 N/A 16.250 297 302 86F 211F Unload 5.6 5C

!C 1 10 7.500 2.500 16.250 315 822 86F 211F 2.54 2.31 113.1 3.6 0.7 1.01 1 38T 75 36

~otes: 1. Rod loading is based on maximum differential pressure across the rings. C • Compression, T - Tension.

Forces due to inertia are not accounted for in this table.

2. Flow Balance = capacity from suction VE 1 capacity from discharge VE.

3. If the flow balance is much greater than 1.0 suspect leaking suction valves or rings.

If the flow balance is much less than 1.0 suspect leaking discharge valves or rings.

4. Discharge Temp. Delta = actual discharge temp· theoretical.

5. If Suction or Discharge Temperatures are not found, some calculations may not be available as indicated by a ••••••.

6. Gas power = Total indicated power for all cylinders I Mechanical Efficiency.

7. Compressor total brake power = Gas power + Auxiliary brake power' RPM 1 Rated RPM.

8. Derated power is obtained by derating the rated power to actual run speed.

9. Compressor efficiency is the total indicated power· suction and discharge losses

as a percentage ofthe total indicated power.

10. If nozzle pressures are recorded, suction and dischare losses for each end are valve and passage losses only.

Otherwise, they are calculated from the terminal pressures and include the pulsation losses.

11. Marker Type: Encoder (ENC) and Trap Type: 9260.

12. Channel Resonance Correction (CRC) applied: None13. Corrected VE applied, PS and PO values Corrected: None

Total Indicated Power, (ihp) 229 @ 719 RPM Rated Power, (bhp) 650 @ 900 RPM

Gas Power, (ghp) 241 @ 719 RPM Derated Power, (bhp) 520 @ 719 RPM

Auxiliary Power, (bhp) 19 @ 900 RPM Percent Torque Load, % 49 %

Compressor Total Power, (bhp) 256 @ 719 RPM Compressor Efficiency, % 98 %

Analyst Signature: 21512009 2:54:48 PM