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0 11.10.2012 Issued for Construction

A 13-07-2012 Issued for Approval

REV. DATE DESCRIPTION DSGN CHKD APPD

PROJECT :

TWO(2) x 500MW MONG DUONG 1 THERMAL POWER PLANT

EMPLOYER :

CONSULTANT :

CONTRACTOR :

DESIGNED BY DATE TITLE :

11.10.2012

EMERGENCY DIESEL GENERATOR SIZINGCALCULATION

CHECKED BY DATE

11.10.2012

APPROVED BY DATE PROJECT NUMBER DOCUMENT NUMBER REV.

11.10.2012 ADB/MD1-TPIP/EPC150911 MD1-0-E-182-06-00001 0

FOR CONSTRUCTION

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CONTENTS

1.0 GENERAL ...................................................................................................................... 12.0 REFERENCES ............................................................................................................... 13.0 DESIGN CRITERIA & FORMULA ............................................................................ 14.0 CALCULATION OF EDG SIZING ............................................................................. 35.0 CONCLUSION ............................................................................................................... 4

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1.0 GENERAL

This calculation is prepared to determine the capacity of Emergency Diesel Generator (EDG)

for safe shut down operation and provide power for essential supplies of Mong Duong 1 TPP

in Vietnam.

2.0 REFERENCES

1) Essential Electric Consumer List

2) IEEE Std. 399-1990 Recommended Practice for Industrial and Commercial PowerSystems Analysis.

3.0 DESIGN CRITERIA & FORMULA

3.1 General

To calculate the capacity of EDG, the following cases are considered:

Case I : Capacity during shut down of STGs Case II : Capacity for starting the largest motor while in islanded operation

3.2 Load Profile

3.2.1 Unit Loads

Load NameLoadType

Q'tyRatedPower[kW]

PowerFactor

Eff.Duty

Factor

Input

[kW] [kVA]

STG

Main Seal Oil Pump M 1 18.5 0.85 0.8 1 23.13 27.21Recirculation Seal Oil Pump M 1 7.5 0.85 0.8 1 9.38 11.03

Turning Gear M 1 44.7 0.8 0.92 1 48.59 60.73

Vapor Extractor Motor M 1 5.6 0.85 0.8 1 7.00 8.24

Gland Exhauster Motor M 1 11.2 0.85 0.8 1 14.00 16.47

Bearing Pump Motor M 1 150 0.85 1 1 150.00 176.47

Stator Cooling Pump M 1 45 0.9 0.9 1 50.00 55.56

BOILER

AH Support Bearing Oil Pump

MTRM 2 1.5 0.85 0.8 1 3.75 4.41

AH Guide Bearing Oil Pump

MTR

M 2 1.5 0.85 0.8 1 3.75 4.41

AH Aux. Drive Motor M 2 11.0 0.85 0.8 0 0.00 0.00

AH Sector Plate 1 Drive Motor M 2 0.75 0.85 0.8 0.5 0.94 1.10

AH Sector Plate 2 Drive Motor M 2 0.75 0.85 0.8 0.5 0.94 1.10

AH Sector Plate 3 Drive Motor M 2 0.75 0.85 0.8 0.5 0.94 1.10

PA Fan A Lube Oil Pump A

MTRM 2 3.7 0.85 0.8 1 9.25 10.88

PA Fan A Lube Oil Pump B

MTRM 2 3.7 0.85 0.8 0 0.00 0.00

PA Fan B Lube Oil Pump AMTR

M 2 3.7 0.85 0.8 1 9.25 10.88

PA Fan B Lube Oil Pump B

MTRM 2 3.7 0.85 0.8 0 0.00 0.00

SA Fan A Lube Oil Pump AMTR

M 2 2.2 0.85 0.8 1 5.50 6.47

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Load NameLoadType

Q'tyRatedPower[kW]

PowerFactor

Eff.Duty

Factor

Input

[kW] [kVA]

SA Fan A Lube Oil Pump BMTR

M 2 2.2 0.85 0.8 0 0.00 0.00

SA Fan B Lube Oil Pump A

MTR M 2 2.2 0.85 0.8 1 5.50 6.47SA Fan B Lube Oil Pump BMTR

M 2 2.2 0.85 0.8 0 0.00 0.00

BFP

Lube Oil Pump for Feed WaterPump

M 1 18 0.87 0.91 1 19.78 22.74

STACK

Ground Floor Lighting NM 1 0.8 1 1 1 0.80 0.80Platforms Lighting NM 1 1.2 1 1 1 1.20 1.20Aircraft Warning Lights NM 1 7.2 1 1 1 7.20 7.20PDP (internal) NM 1 2.4 1 1 1 2.40 2.40Ladders Lighting NM 1 1.2 1 1 1 1.20 1.20Emergency Lights NM 1 1.6 1 1 1 1.60 1.60PDP (internal) NM 1 2.4 1 1 1 2.40 2.40Stack Spare (20%) NM 1 3.4 1 1 1 3.36 3.36

I.D FAN

I.D Fan Lube Oil Pump Motor M 4 3.7 0.75 0.87 1 17.01 22.68

I.D Fan Fluid CouplingActuator

M 4 1.2 0.75 0.87 0.5 2.76 3.68

Sum of Motor Load 381.47 451.63

Sum of Non-Motor Load 20.16 20.16

Sum of All Load 401.63 471.79

Notes: 1. Load type: M (Motor load), NM (Non-motor load)2. Input power[kW]: Qty x Rated Power x Duty Factor / Efficiency3. Input power[kVA]: Qty x Rated Power x Duty Factor / Efficiency / Power Factor4. Duty factor: Continuous (1), Intermittent (0.5), Stand-by (0)

3.2.2 DC & UPS, BOP Loads

Load NameLoadType

Q'tyRatedPower[kW]

PowerFactor

Eff.Duty

Factor

Input

[kW] [kVA]

ELEC

DC UPS for Power Plant NM 1 250 1 1 1 250.00 250.00DC UPS for Cooling Water NM 1 20 1 1 1 20.00 20.00

WT

Potable Water Pump A M 1 22 0.85 0.8 1 23.91 28.81

Potable Water Pump B M 1 22 0.85 0.8 0 0 0

HVAC

Precision Air Conditioner NM 1 11 1 1 1 11.00 11.00

Air Cooled Water Chiller NM 1 116 1 1 1 116.00 116.00

Chilled Water Pump M 1 19 1 1 1 19.00 19.00

CHLORINATION

Absortion tower blower A M 1 11 0.85 0.89 1 12.36 14.54

Circulating pump_A M 1 5.5 0.88 0.89 1 6.25 7.10

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Sum of Motor Load 61.52 69.45

Sum of Non-Motor Load 397.00 397.00

Sum of All Load 458.52 466.45

Notes: 1. Load type: M (Motor load), NM (Non-motor load)

2. Input power: Qty x Rated Power x Duty Factor / Efficiency3. Input power[kVA]: Qty x Rated Power x Duty Factor / Efficiency / Power Factor4. Duty factor: Continuous (1), Intermittent (0.5), Stand-by (0)

4.0 CALCULATION OF EDG SIZING

4.1 Calculation for Case I

The capacity required for continuous operation during shutdown of STG Unit is calculated by

the following formula;

Where,

PG1 : Generator capacity [kVA]

pfG : Generator power factor (0.85)

P : Output of load [kW]

: Efficiency of load

a : Coefficienct considering load factor, demand factor, margin of capacity, etc

(Motor: 0.9, Non-motor: 1.0)

4.2 Calculation for Case II

The EDG shall also be capable of starting the largest motor (Bearing pump motor for STG

Unit 1, 150kW or 176.47kVA) as the remaining loads are running;

Where,

PG2 : Generator capacity [kVA]

0W : Summation of operating load [kVA] (938.25-176.47=761.77kVA)

Lcos : Power factor during starting of the largest motor (0.25)

K : Overload capacity of generator (1.1)

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kVA

kVApf

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L

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5.0 CONCLUSION

ITEM

DESCRIPTION

CALCULATED

CAPACITY

SELECTED

CAPACITY

CAPACITY WITH

20% MARGIN

Emergency Diesel

Generator

PG1: 959.82kVAPG2: 973.27kVA 1167.92kVA

PG2: 973.27kVA

Based on the calculated capacities and considering sufficient margin, the rated capacity of

both EDG Unit 1 & 2 will be selected as 1200kVA at 0.85PF.