Energy Efficiency in WASAs Engr. Abid Hussainy

Engr. Ali Raza Engr. Shafqat Ullah

Big Picture – 5 WASAs

Rs. 4.6 Billion

per Annum

Total Billing 1

131 MW Sanctioned

Load 2

Rs. 207 Million

per Annum

Savings Potential from Billing Analysis

3

Installed Vs Sanctioned Load( 127/131 MW)

75.1

9.4

20.2

15.7

8.8

66.0

9.6

14.3

21.5

6.9

LAHORE RAWALPINDI MULTAN FAISALABAD GUJRANWALA

Installed Capacity (MW) Sanctioned Load from WAPDA (MW)

Tubewell & Disposal Station Detail

Lahore Rawalpindi Multan Faisalabad Gujranwala

Supply Stations 491 362 102 82 67

Disposal Stations 99 21 34 22

491

362

102 82

67 99

21 34 22

0

50

100

150

200

250

300

350

400

450

500

Supply Stations Disposal Stations

EA -Asset Information

WASAs No. of Pump- Motor Sets

Design Capacity (Cusec)

Lahore 776 5799

Rawalpindi 362 850

Multan 161 1061

Faisalabad 222 1284

Gujranwala 112 610

Total 1633 9604

What is ENERGY AUDIT?

Energy Efficiency Objectives

Efficiency Improvement

Condition Improve

ment

Bill Reduction

Energy Audit Phase- I

59%

38%

30%

0%

5%

39%

21%

15%

0%

16%

0%

37%

23%

56% 60%

2% 4%

29%

44%

19%

0%

10%

20%

30%

40%

50%

60%

70%

WASA Faisalabad WASA Multan WASA Gujranwala WASA Rawalpindi WASA Lahore

Tubewell Condition Survey - Result

Excellent (Rating >70%) Good (Rating <=70%) Fair(Rating <=60%) Poor (Rating <=40%)

Energy Audit Phase- I

0% 0%

19%

8% 7%

41%

33%

7%

51% 56%

14%

64%

42%

3%

34%

21%

0%

10%

20%

30%

40%

50%

60%

70%

WASA Faisalabad WASA Multan WASA Gujranwala WASA Lahore

Disposal Station Condition Survey - Result

Excellent (Rating >70%) Good (Rating <=70%) Fair(Rating <=60%) Poor (Rating <=40%)

Electric Billing Analysis

Energy Management Opportunities

94

8 6

14

6 13

3 4 7 8

21

4 6 7 5

0

10

20

30

40

50

60

70

80

90

100

Lahore Rawalpindi Gujranwala Multan Faisalabad

Mill

ion

PK

R

EMO Savings (207 Million per Annum)

Off Peak Savings

MDI Savings

PF Improvements

Tube well & Disposal Station - Energy Management Plan

Tubewell station WASA Multan

Disposal Station

Energy Audit Survey http://202.166.167.115/energy_audit_survey/

Energy Audit – Phase 2

METHODOLOGY

Secondary Data from

Urban Units

Primary Data

Field Measurements

Energy Audit

Report of each Sub-division

Consolidated City Report

On Line Data Recording in

Android based

Application

LAHORE CITY

Detail of WASA Lahore Town No. of Water

Supply Pumps No. of Wastewater

Disposal Pumps Total No. of Pumps

Allama Iqbal Town 84 31 115

Gunj Buksh 63 15 78

Gulberg 64 30 94

Nishtar Town 65 26 91

Ravi Town 100 57 157

Shalimar Town & Aziz Bhatti Town

89 27 116

Total 465 186 651

Tubewells Stations

Disposal Stations

PUMPING SYSTEM EFFICIENCY

PUMPING SYSTEM EFFICIENCY CLASSIFICATION

Motor HP Low Fair Good Excellent

3-7.5 <44.0 44-49.9 50-54.9 >54.9

10 <46.0 46-52.9 53-57.9 >57.9

15 <47.1 48-53.9 54-59.9 >59.9

20-25 <48.0 50-56.9 57-60.9 >60.9

30-50 <52.1 52.1-58.9 59-61.9 >61.9

60-75 <56.0 56-60.9 61-65.9 >65.9

100 <57.3 57.3-62.9 63-66.9 >66.9

150 <58.1 58.1-63.4 63.5-68.9 >68.9

200 <59.1 59.1-63.8 63.9-69.4 >69.4

250 <59.1 59.1-63.8 63.9-69.4 >69.4

300 <60 60-64.0 64.1-69.9 >69.9

Source: Pacific Gas & Electric Company, USA

UNIT ELECTRICITY (kWh/m3) CONSUMPTION TREND

Energy Consumption Trend

About 79% (369) of the tube wells consume electricity more than

the 0.20 kWh/m3. In case if all the 465 tube wells consume

optimum electricity, then annually Rs. 443 million (19%) can be saved.

ISSUES

Mechanical

Gland leakage

Non return valve leakage

Ratchet plate non operational

Chlorinator issue

No water flow meter

& pressure gauge

Impeller adjustment

Repair & maintenance

Electrical

Improper wiring

Out of order ammeter

& voltmeters

No PFI plant

No VFDs

Out of order voltage & current relays

Improper motor terminals

Overloaded motors

Housekeeping

Poor general housekeeping

No shades on motor & pump

Improper panel fixation

Improper cabling

Lack in Record keeping

PUMPING SYSTEM EFFICIENCY POTENTIAL OF PUMPS

155 pumps needs impellers adjustment

135 pumps need impeller adjustment and repair and maintenance

42 pumps needs to be replaced

16 pumps' motors needs to be replaced

04 pumping systems (pump and motor) need to be replaced

01 pump needs impeller adjustment, repair and maintenance and motor to be replaced

Energy Management Plan • Reduction in the WASA operational hours during the peak

hours of electric utility company • Control on Maximum Demand Indicator • Impeller Adjustment of 290 Pumps • Replacement of 42 In-efficient Pumps • Replacement of 20 in-efficient Motors • Installation of Power Factor Improvement Relays at 406

locations • Installation of Variable Frequency Drives at 55 locations

Investment- Saving- Payback

Tasks Investment (PKR Million)

Savings (PKR Million)

Pay Back Period

(Months)

Efficiency Improvement of Pumping System (333 Pumps & 20 Motors)

319 389 8-9

Electrical, Mechanical and Housekeeping at Disposal & Tube well Improvements

488 - -

Total 807 389 24

Energy Reduction (13%) 29.91 million kWh/yr CO2 reduction = 14,000 ton/yr

MULTAN CITY

Detail of WASA Multan

Town No. of Water Supply Pumps

No. of Wastewater Disposal Pumps

Total No. of Pumps

Waterworks Division 66 - 66

Disposal Division - 59 59

Total 66 59 125

Discharge Pattern

Tube Wells The installed capacity = 58.08 million m3 per annum (260 Cusec) Actual discharge = 58.22 million m3 per annum (260.62 Cusec)

Disposal Pumps The installed capacity = 385 million m3 per annum (646 cusec) Actual discharge = 249 million m3 per annum ( 35% lesser) – 419 cusec

Energy Consumption Pattern

76% of the tube wells consume electricity more than the 0.20 kWh/m3.

In case if all the 66 tube wells consume optimum electricity, then

annually Rs. 21.2 million (12%) can be saved.

PUMPING SYSTEM EFFICIENCY

Pumping System Efficiency Category

Excellent 14%

Good 9%

Fair 14% Low

63%

PUMPING SYSTEM EFFICIENCY POTENTIAL OF PUMPS

47 pumps needs impellers adjustment

44 pumps need impeller adjustment and repair and maintenance

01 pump needs to be replaced

04 pumps' motors needs to be replaced

Investment- Saving- Payback Tasks Investment

(PKR Million) Savings

(PKR Million) Pay Back

Period (Months)

Efficiency Improvement of Pumping System (92 Pumps & 4 Motors)

48.7 78.6 8

Electrical, Mechanical and Housekeeping at Disposal & Tube well Improvements

59.8 - -

Total 108.5 78.6 9

Energy Reduction (20%) 6.0 million kWh/yr CO2 reduction = 2,800 ton/yr

PICTURES