nairobi city water & sewerage c ompany
DESCRIPTION
Business Case for Piloting AMR Solution for Bulk Consumers Presented by: Mburu Kiemo Non Revenue Water Department . Nairobi City Water & Sewerage C ompany . 9 th May 2013. Demonstrate Existing Estimates of Revenue Losses Identify AMR as a Possible Solution Discussion. - PowerPoint PPT PresentationTRANSCRIPT
Nairobi City Water & Sewerage Company
Business Case for Piloting AMR Solution for Bulk ConsumersPresented by: Mburu Kiemo
Non Revenue Water Department
9th May 2013
2
Objective of the Presentation
Demonstrate Existing Estimates of Revenue Losses
Identify AMR as a Possible Solution
Discussion
3
AMRs: improving efficiencies & increasing revenues
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
Knowledge management and efficiencies on the ground
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
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.
5
Identifying the needs and understanding the context
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.
Findings: There was inconsistency in readings in all levels, among high end consumers…..
March April May June July August0
50,000
100,000
150,000
200,000
250,000
300,000
350,000
E P ZONES
KENYA BREWERIES LTD
Cons
umtio
n Vo
lum
e m
3
High End Consumers (>100m3/mth)
……..
March April May June July August0
5,00010,00015,00020,00025,00030,00035,000
Other ConsumersBREWERIES LTD AFRICAN EAST
KENYA BREWERIES LTD
KENYA BREWERIES LTD.
IBER AFRICA POWER
IBERAFRICA POWER EA LTD
Cons
umpt
ion
Volu
me (
m3)
.... and zero or very low readings for others over 3-5 months (sample below)
March April May June July August0
1,0002,0003,0004,0005,0006,0007,0008,0009,000
University Students AC Board UON Student Welfare AuthorityVeteran Pharmaceuticals Ltd Vrajlal Kakad Mohanlal
Cons
umpt
ion
m3
9For 237 consumers the cumulated potential loss of KShs 45million upto KShs 194million over a 6 months period
Mar2012
Apr 2012
May2012
Jun2012
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
10A second analysis was recommended using updated information
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
Findings: with new data, inconsistencies were still observed.
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC -
50,000
100,000
150,000
200,000
250,000
300,000
E P Zones Kenya Breweries Limited
Cons
umpt
ion
m3
Max: 168,528
Min: 71,080
Max: 264,200
Min: 171,100
12Translating to large differences in revenue ….. upto 9 million a month for one large consumer
EP Zones Kenya Breweries Ltd Dir of Aerodromes0
50,000
100,000
150,000
200,000
250,000
300,000
- 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
264,200
168,528
60,090
171,100
71,080
21,053 2.5
9.2
3.7
Max Min Difference (KShs)
Cons
umpt
ion
m3
KShs
milli
ons
13Even among the not so large…. with an estimated difference (bet max & min) for all 100 of 64.9 million
KNH New KCC Ltd New KCC Ltd Kenyatta Est MO
United Aryan (EPZ) Ltd
0
5,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
-
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00
1.36
0.79
0.52
1.59
1.87
Max Min Difference (KShs)
Cons
umpt
ion
m3
KShs
14
Seven sites proposed based on consumption and random…..
1. Kenya Breweries (main meter)2. Kenya Breweries (Allsops)3. EP Zones 4. IberAfrica Power (EA) Ltd5. Director of Aerodromes (JKIA)6. Nairobi Bottlers (Coca Cola)7. Brookside Dairies Limited
15
Maximum and minimum readings for proposed sample
KBL Ltd
EP Zones
Iber A
frica
Nairob
i Bott
lers
Dir of A
erodro
mes
Brooksi
de Dair
ies
KBL Ltd
0
50,000
100,000
150,000
200,000
250,000
300,000
- 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
9.2
2.5 2.2 1.8
3.7
0.9 0.3
Max Min Difference (KShs)
16Proposed Solution
AUTOMATED METER READING
17Existing Metering Technology
Bulk Flow Meter
Electronical BFM
Electromagnetic Flow
Meter (EMF)
Ultrasonic Flow Meter
(UFM)
Mechanical BFM
Woltmann Meter (WFM)
18
Most common bulk meter is the woltmann meter
19Challenges of Woltmann meters
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.
20Nairobi Water’s business is the supply and distribution of water to consumers – a Contract
Responsibility of NCWSC to determine the correct consumptions are billed – not more not less.▪ Accurately ▪ Legally binding contract
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.
Dept of Weights & Measures
21
Meter Reading & Billing steps:
STEP 1: Record Cons
• Mechanical Meter
STEP 2: Data Collection
• Meter Reader
STEP 3 : Interface w. billing
• Data Entry Clerks
Electronic Meters
Remote Reading &
TransmissionSeamless
IntegrationTimely
Accurate Mgt Reports
Proposed Solution
Focus on consistency, accuracy and speed – customer service & growth
Current System
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Advantages of Automatic meter reading
1) Improvement in efficiency of meter reading.2) Reduced operating cost3) Skipping of access problems of meter reading.4) Estimated billing not necessary5) Tampering of meter can be detected.6) Back up to customer information services.
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Ultrasonic Flow Meters
Clamp-on Ultrasonic flow meter
Insertion Ultrasonic flow meter
Inline Flanged Ultrasonic flow meter
Calculator with GSM/GPRS Unit
24
Electromagnetic flow meters
Inline Flanged Electromagnetic Flow meter Insertion Electromagnetic Flow
meter
25Depending on needs, they each similarities and differences in features.
Technology Accuracy (+/-)
Non-Intrusiv
e
Ease of Installati
on
Approval for Billing
Power Supply Cost
Inline Ultrasonic 2% Y Pipe
Cutting YBattery ~ 10 years
Price cheaper for sizes above DN250
Clamp-On / Insertion Ultrasonic
0.5% Y Easy NBatteryElectricity Solar
One size fits all
Inline Electromagnetic
1% Y Pipe Cutting Y
Battery ~ 5 years
Price high for sizes above DN250
Insertion Electromagnetic
2% Y Easy NBattery Power ~ 5 years
One size fits all
26Full bore (Inline) Flow MeterAdvantages of full bore magnetic (Inline) flow meter
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
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Interface with billing system
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
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Interface with billing system
NWSC Central Billing System
(RDBMS)
MANUAL READING• Existing Manual
Reading clerks Data entry
clerks Self reading
• Semi Manual Reading
Data Terminals and Loggers
Self reading via SMS
AMR Radio Wireless Wi-Fi ZigBee GSM/GPRS
29
Sample of meters installed with data transmission
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Risks and Fears (for discussion)
Where has it been done
How is it working Loss of jobs Transmission
security Security of
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Is the investment and return worth all the effort?
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!