Nairobi City Water & Sewerage Company
9th May 2013
2

Demonstrate Existing Estimates of Revenue Losses

Identify AMR as a Possible Solution

Discussion
3
Addressing some Technology challenges including:

Clogging and blockages of meters

Under performance of meters - consistency

Under registration of meters - and impact on revenue

Calibration
... and Operational challenges:

Human interface

Efficiency in meter reading and billing

Slow response after breakdown of meters
4
EPZ: Meter chamber filled up with raw
sewerage … meter reading a challenge.
Coca Cola: may be under sized; fittings too close
to meter and may cause turbulence.
JKIA: the flow is not consistent with the size
of meter; bypass observed.
Iber Africa: Meter observed to be moving at a
very slow motion
5

Step 1: Resolution & Demonstration of Technology Choices
 That technology should be used to address some of these challenges.
 That technology is available, i.e. electromagnetic and ultrasonic.
 Step 2: First Data Analysis
 Period: March – August 2012
 Consumers: 237
 Three levels: High, Middle and Low Level Consumers
 Assess: accuracy and consistency of data; and identifying sizing
consumption patterns.
High End Consumers (>100m3/mth)
Consumtion Volume m3
350,000
300,000
E P ZONES
250,000
200,000
KENYA
BREWERIES LTD
150,000
100,000
50,000
0
March
April
May
June
July
August
Consumption Volume (m3)
Other Consumers
35,000
30,000
25,000
20,000
15,000
10,000
5,000
0
BREWERIES LTD
AFRICAN EAST
KENYA
BREWERIES LTD
KENYA
BREWERIES LTD.
IBER AFRICA
POWER
IBERAFRICA
POWER EA LTD
9,000
8,000
Consumption m3
7,000
6,000
5,000
4,000
3,000
2,000
1,000
0
March
April
May
June
July
August
University Students AC Board
UON Student Welfare Authority
Veteran Pharmaceuticals Ltd
Vrajlal Kakad Mohanlal
9
Mar
2012
Apr
2012
May
2012
Jun
2012
Jul
2012
Aug
2012
Total
Volume (million m3)
2.00
1.77
1.67
1.48
1.52
1.52
9.95
Monthly Revenue
(millions KShs)
188
166
157
139
143
143
937
Monthly diff
(millions KShs)
-22
-10
-18
4
0
-45
Diff w. March
(millions KShs)
-22
-32
-49
-46
-45
-194
10
Step 3: Second Data Analysis
to assess the challenges and identify focus consumers for a
pilot.
 Longer Period: January – December 2011
 Fewer Consumers: top 100 consumers
 Three levels: High, Middle and Low Level
11
300,000
Max: 264,200
Consumption m3
250,000
200,000
Min: 171,100
150,000
Max: 168,528
100,000
Min: 71,080
50,000
JAN
FEB MAR APR MAY JUN
E P Zones
JUL AUG SEP OCT NOV DEC
Kenya Breweries Limited
300,000
264,200
9.2
Consumption m3
250,000
200,000
171,100
168,528
150,000
100,000
50,000
71,080
2.5
3.7
60,090
21,053
0
EP Zones
Kenya Breweries Ltd
Max
Min
Dir of Aerodromes
Difference (KShs)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
-
KShs millions
12
13
50,000
2.00
1.87
40,000
1.59
35,000
1.80
1.60
1.40
1.36
30,000
1.20
25,000
1.00
20,000
0.80
0.79
15,000
0.52
10,000
5,000
0.60
0.40
0.20
0
KNH
New KCC Ltd New KCC Ltd Kenyatta Est United Aryan
MO
(EPZ) Ltd
Max
Min
Difference (KShs)
KShs
Consumption m3
45,000
14
1.
Kenya Breweries (main meter)
2.
Kenya Breweries (Allsops)
3.
EP Zones
4.
IberAfrica Power (EA) Ltd
5.
Director of Aerodromes (JKIA)
6.
Nairobi Bottlers (Coca Cola)
7.
Brookside Dairies Limited
15
300,000
250,000
9.2
200,000
150,000
3.7
100,000
2.5
50,000
2.2
1.8
0
Max
Min
Difference (KShs)
KBL Ltd
EP Zones
Iber Africa
Nairobi
Bottlers
168,528
71,080
9.2
264,200
171,100
2.5
29,960
6,898
2.2
51,420
32,070
1.8
Max
Min
0.9
Dir of
Brookside
Aerodrome
Dairies
s
60,090
18,402
21,053
8,465
3.7
0.9
Difference (KShs)
0.3
KBL Ltd
16,685
13,103
0.3
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
-
Proposed Solution
16
AUTOMATED METER
READING
17
Bulk Flow Meter
Electronical
BFM
Electromagnetic
Flow Meter
(EMF)
Ultrasonic Flow
Meter (UFM)
Mechanical BFM
Woltmann
Meter (WFM)
18
19
Situation in Nairobi regarding the Woltmann meters:
•
•
•
•
•
•
•
•
•
•
Frequent stalling due to debris blocking impellors
Strainers are not existing or not maintained (periodical cleaning).
Calibration not done as recommended
Installation and flow conditioning note done as recommended
It takes time to notice meter is stalled
Limited to high flows
Affected by means of permanent magnets
Not available in metrological classes in BIS
Dial/Glass foggy eg .during rainy season
Meter reading environment not favourable to meter reader
 The further use of WFM for metering of HC-consumers is not
recommended.
20

Responsibility of NCWSC to determine the correct
consumptions are billed – not more not less.
▪ Accurately
▪ Legally binding contract
Dept of
Weights &
Measures

As a business, it is also your responsibility to expand
and grow sustainably (time and consistency).

Thus, all utility companies focus on metering as the
first step in growing a sustainable business.
21
Current System
STEP 1:
Record Cons
• Mechanical
Meter
STEP 2:
Data
Collection
• Meter
Reader
STEP 3 :
Interface w.
billing
STEP 4 :
Managemt
Reporting
• Data Entry
Clerks
• Reporting
Seamless
Integration
Timely Accurate
Mgt Reports
Proposed Solution
Electronic Meters
Remote Reading
& Transmission
Focus on consistency, accuracy and speed – customer service & growth
22
1) Improvement in efficiency of meter
reading.
2) Reduced operating cost
3) Skipping of access problems of meter
reading.
4) Estimated billing not necessary
5) Tampering of meter can be detected.
6) Back up to customer information
services.
23
Clamp-on Ultrasonic flow meter
Insertion Ultrasonic flow meter
Calculator with GSM/GPRS Unit
Inline Flanged Ultrasonic flow meter
24
Inline Flanged Electromagnetic Flow meter
Insertion Electromagnetic Flow meter
25
Technology
Inline Ultrasonic
Clamp-On /
Insertion
Ultrasonic
Inline
Electromagnetic
Insertion
Electromagnetic
Accuracy
(+/-)
2%
0.5%
1%
2%
NonIntrusive
Y
Y
Y
Y
Ease of
Installation
Pipe Cutting
Easy
Pipe Cutting
Easy
Approval Power
for Billing Supply
Cost
Y
Battery ~
10 years
Price
cheaper for
sizes above
DN250
N
Battery
Electricity
Solar
One size fits
all
Y
Price high
Battery ~ 5 for sizes
years
above
DN250
N
Battery
Power ~ 5
years
One size fits
all
26












i) Unobstructed flow passage
ii) No moving parts
iii) No additional pressure drop
iv) Unaffected by changes in temperature, density, viscosity,
electrical
conductivity
v) Flow range setting can be optimised
vi) Suitable for water containing suspended solids
vii) Short conditioning section is required as it is insensitive to flow
profile
viii) Measures flow both the directions
ix) Un- affected by contamination and deposit
x) Minimum maintenance
xi) Good linearity
xii) Smaller diameter flow meter can be used on bigger diameter
pipe with
27

Open system that integrates seamlessly with common
RDBMS dBase e.g. SQL, Oracle

Local integration based on NWSC requirements

System should fit seamlessly
 With existing data collection system
 With central billing system
28
MANUAL READING
• Existing Manual
 Reading clerks
 Data entry clerks
 Self reading
• Semi Manual Reading
 Data Terminals and
Loggers
 Self reading via SMS

AMR
 Radio
NWSC Central
Billing System
(RDBMS)
 Wireless
 Wi-Fi
 ZigBee
 GSM/GPRS
29
30
31





Where has it been
done
How is it working
Loss of jobs
Transmission security
Security of
32

Average cost of a meter = KShs 2million.

Out of the 7 customers, we assume that KShs 15 million is
lost per month

We project that 2/3 of this is from commercial losses = KShs
7.5 million

If we take half (KShs 3.5million per month) of this figure Annually = 36million from the seven customers

If we spend 189million changing the technology for all the
237 consumers, the money will be recouped in 5 years

ROI = 1.5 years.
33
Thank you
for your
attention!