solar & diesel water pump costing tool 2006 ver 1
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Comparative PV Pumping and Diesel Pumping Costing Tool for Namibia
Commissioned by Ministry of Mines and Energyfor the
Barrier Removal to Namibian Renewable Energy Programme (NAMREP)
with acknowledgements to
UNDP/GEF
developed by Emcon Consulting Group
[Email: [email protected]]
Costing Tool for Solar & Diesel water pumping Ver 2006 Rev 0
USER INFORMATION
OUTPUT OF THE COSTING TOOL
USING THE COSTING SPREADSHEET
RESULTS
MAINTENANCE AND REPLACEMENT
GLOBAL PARAMETERS
VARIABLES
DATA LOCATION
NOTES ON FORMULAE'S USED
FINANCIAL DEFINITIONS
ASSUMPTIONS
ERRORS AND DISCREPANCIES
ISSUES TO ADDRESS ONE FINE DAY
COLOUR CODES
Diagrammatic overview of spreadsheet
Function of:
PVP model
Performance at heads
of 10m, 20m, 30m
200m
Wpeak as fn of daily
flowrate
6kWh/m2/day
Capital
cost
Selection of head
Life Cycle Cost
Performance
Solarpump
Operating
cost
M&R
cost
Results
Watt peak
Function of:
System selected
Head
Daily flowrate
RWS or PRIVATE
Distance to site
Watt peak
Function of:
RWS or PRIVATE
Distance to pump
Function of:
Years of operation
RWS or PRIVATE
Labour
Transport
Function of:
Project life
Discount rate
Inflation rate
Function of:
PVP model
Performance at heads
of 10m, 20m, 30m
200m
Wpeak as fn of daily
flowrate
6kWh/m2/day
Capital
cost
Selection of head
Life Cycle Cost
Performance
Solarpump
Operating
cost
M&R
cost
Results
Watt peak
Function of:
System selected
Head
Daily flowrate
RWS or PRIVATE
Distance to site
Watt peak
Function of:
RWS or PRIVATE
Distance to pump
Function of:
Years of operation
RWS or PRIVATE
Labour
Transport
Function of:
Project life
Discount rate
Inflation rate
Sheet: User info (10/16/2013) 180699025.xls.ms_office
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& daily flowrate
Breakeven
Unit Water Cost
ar
Dies
elPump
Function of: Pump efficiency
Rising main losses
Windage losses
Derating
Load factor
Engine size
Function of:
Quality selected
Head Pumping schedule
Hourly flowrate
RWS or PRIVATE
Distance to site
Engine size
ap a cos
Function of:
RWS or PRIVATE
Fuel consumption
Cost of fuel transport
Distance to pump
pera ng cos
Function of:
Hours of operation
RWS or PRIVATE
Labour
Transport
cos
Function of: Project life
Discount rate
Inflation rate
Diesel escalation
rate
& daily flowrate
Breakeven
Unit Water Cost
ar
Dies
elPump
Function of: Pump efficiency
Rising main losses
Windage losses
Derating
Load factor
Engine size
Function of:
Quality selected
Head Pumping schedule
Hourly flowrate
RWS or PRIVATE
Distance to site
Engine size
ap a cos
Function of:
RWS or PRIVATE
Fuel consumption
Cost of fuel transport
Distance to pump
pera ng cos
Function of:
Hours of operation
RWS or PRIVATE
Labour
Transport
cos
Function of: Project life
Discount rate
Inflation rate
Diesel escalation
rate
Sheet: User info (10/16/2013) 180699025.xls.ms_office
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MAIN INPUTS Values Units
Pumping head: Select 80 mDaily pump volume 8.0 m/day
Installation distance (adds to capital cost) 300 kmToggle for DRWS/PRIVATE system Private installation
PVP Inputs
PVP make: Select Grundfos SQFlex [200m]
Multiple PVPs 1Irradiance and tracking inputs 6kWh/m/day with 0% tracking
PVP RESULTS
PVP Life Cycle Cost 105,453 N$/projectPVP: Unit water cost 3.41 N$/m
Diesel Pump Inputs
Existing diesel installation? NoDP engine: Select Short life enginePumping interval: Every 2 day(s)Pumping hours per pump cycle 4 hoursCost per litre of diesel 6.70 N$/litre
Diesel price real escalation 4%
Diesel Transport Inputs and Results
Cost of fuel transport 816 N$/paCost of transport to remote pump site 2,190 N$/pa
DIESEL PUMP RESULTS
Diesel pump Life Cycle Cost 307,990 N$/projectDP: Unit water cost 9.96 N$/m
Carbon emission per annum 1.6 tons/pa
Breakeven 2.0 years
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Comments
10 to 200m1 to 60 cubicmeter/dayDistance: Supplier to siteImpacts on capex and on maintenance transport cost
Number of PVP systems in the same borehole: SQF only - ignores for others!Note that irradiance and tracking impact on size of array instead of water delivery
No: New installation; Yes: Existing installation (diesel pump capital cost = zero)
Restricted input: 1 to 4 daysRestricted input: 1 to 24 hoursRestricted input: 3 to 20 N$/litre
Only applicable to PRIVATE installations
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Life Cycle Cost Comparison: Current result
Scenario: Main outputs
Head 80 m LCC
Daily flow 8.0 m/day [N$]
RWS/PRIVATE Private installation Solar Pump 105,453
PVP selected Grundfos SQFlex [200m] Diesel Pump 307,990
PVP quantity SingleIrradiance 6 kWh/m/day Savings 202,537
Tracking 0% Factor: DP/PVP 2.9
DP selected Short life engine
DP interval 2 daysDP hours 4 hours
Breakeven occurs after years2.0
-
100,000
200,000
300,000
400,000
0 2 4 6 8 10 12 14 16 18 20
LifeCycleCo
st[N$]
Operating life [years]
Solar PV Water Pump
Diesel Water Pump
-
50,000
100,000
150,000
200,000
250,000
300,000
350,000
Solar
12,48
All-inclusivecosts[N$]
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UWC Power Efficiency
[N$/m] [%]
3.41 788 Wpeak 49.2% subsystem
9.96 3.3 kW 12.3% overall
N$
Pump Diesel Pump
67,009
44,060
143,222
7,127
83,535
18,836
37,173
Replacement cost
Maintenance cost
Operating cost
Initial cost
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Head: 80 80 mFlow: 8.0 8.0 m3/day
Solar Pump iesel PumpInitial cost 67,009 44,060Operating cos 12,480 143,222Maintenance 7,127 83,535Replacement 18,836 37,173
Total 105,453 307,990
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GLOBAL VARIABLES
FINANCIAL PARAMETERS
Project life 20 yearsNominal rates
nominal discount rate = investment rate 8.5%nominal loan rate 11.5%
inflation rate 4.5%VAT 15%
nominal escalation rate: general 4.5%nominal escalation rate: diesel 8.5%Escalation trend: SELECT Linear SELECT
Real rates
real discount rate = investment rate 4.0%real loan rate 7.0%real escalation rate: general 0.0%real escalation rate: diesel 4.0%
RWS/Private installation
Factor of price reduction: Private as opposed to RWS 50%
TRANSPORT COST
TECHNICAL
Carbon credits (click '+' to view) None
Historical diesel price (Namibia)
Historical inflation development (Namibia)
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Comments
10 to 25 years
Not utilised in this costing analysis
Leave at Linear - Non-linear not recommended - too many uncertainties
Selected RWS prices are reduced by this factor if PRIVATE is selectedE.g.: Engine foundation, borehole accessories, installation, transport for installation and M&R
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Maintenance and Replacement Costs and Intervals
Prices: VAT inclusive
Recurring costs: PVP Active Cost Interval
[N$] [Years]RC2: Replacement of main components 1 16,641 10RC3: Recurring cost: Service of PVP 1 5,175 5
Click '+' to unhide
Recurring costs: DP Cost Interval[N$] [Years]
RC2: Replacement of engine 1 14,950 13RC3: Recurring cost: Minor service 1 2,300 1RC4: Recurring cost: Major service 1 3,094 1RC5: Recurring cost: Overhaul 1 9,430 6
RC6: Recurring cost: Pump and pipes 1 11,237 5Click '+' to unhide
Determine position in array
Transport related to M&RPVP transport cost 1,500DP transport cost 500
Maintenance and Replacement Costs & Intervals: DatabaseRange: pvp_m&r
Grundfos
Labour &
BOS
Cost
[N$]
Interval
[years]1 Replacement of motor/pump/controller unit 1,700 11,470 10
2 Service 3,000 53 14 Lorentz5 Replacement of motor/pump & controller unit 1,700 11,000 76 Service 3,000 37 189 Total TSP 1000
10 Replacement of motor/pump & controller unit 1,700 26,700 1011 Service 8,000 512 11314 Total TSP 2000+15 Replacement of motor/pump & controller unit 2,200 36,200 10
16 Service 15,000 517 1
1819 Watermax20 Replacement of motor/pump & controller unit 1,500 10,400 521 Service 1,000 122 123
Range: dp_m_r
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Short life engine
Cost
[N$]
Interval
[years]
Interval
[hours]1 Replacement 3,000 12,000 13.0 10,0002 Minor service 2,000 1.03 Major service 3,000 2,190 1.0 1,000
4 Overhaul 7,200 6.0 5,0005 Pump and pipes 9,271 5.067 Long life engine8 Replacement 3,000 12,000 47.0 35,0009 Minor service 2,000 1.0
10 Major service 4,000 2,920 1.0 1,00011 Overhaul 3,600 13.0 10,000
12 Pump and pipes 9,271 5.01314
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Comments
Transport included here, VAT added here; Multi PVP hereTransport included here, VAT added here; Multi PVP here
Transport included here, VAT added hereNo transport - done with local skillsTransport included here, VAT added hereTransport included here, VAT added here
Transport is double counted here if it coincides with a major service!
RWS (install_distance): full transport cost; Private - transport contribution: 50%RWS (service_distance): full transport cost; Private - transport contribution: 50%
Labour and components
Part and Labour
Labour and componentsPart and Labour
Labour and componentsPart and Labour
Labour and components
Part and Labour
Labour and componentsPart and Labour
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Includes parts & labourMinor service - 4 pa, incl oil, air & fuel filters, done by local operatorInvolved arrangement here to change major service cost if interval l 1.37
Overhaul cost 60% of new valueRWS/PRIV factor is incorporated in Labour
Includes parts & labourMinor service - 4 pa, incl oil, air & fuel filters, done by local operatorInvolved arrangement here to change major service cost if interval l 1.37Overhaul cost 30% of new value
RWS/PRIV factor is incorporated in Labour
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Summary of variables in tool Value Impact SheetnameHead 80 na MAINDaily flowrate 8 na MAINRWS or Private installation Private installation High MAINDistance to site (install_distance) 300 Small MAINPVP
PVP make Grundfos SQFlex [200m] Medium MAINMultiple PVPs 1 High MAINIrradiance levels 6 High MAINTracking factor 0% Medium MAIN
DP
New or existing diesel installation No High MAINDiesel engine Short life engine Medium MAINDiesel pumping schedule 2 High MAINDiesel pumping schedule 4 High MAINDiesel price 6.70 Medium MAINDistance to next nearest fuel depot (service_distance) 100 Medium MAINNumber of trips per year 6 Medium MAINCost contribution towards fuel transport 20% Medium MAINCost of time 40 Small MAINDistance of operator to diesel pump (operator_distance) 3 High MAIN% contribution to trip costs for starting of DP 50% High MAINCost of time 40 Small MAIN
Capital cost
PVP component cost Various Various PVP costDP component cost Various Various DP cost
Maintenance and replacement
PVP maintenance costs: Parts Various Various M&RPVP maintenance costs: Labour Various Various M&RPVP maintenance interval Various Various M&RPVP replacement cost: Components fixed thru PVP prices Various M&RPVP replacement cost: Labour Various Various M&RPVP replacement interval Various Various M&R
M&RDP maintenance costs Various Various M&RDP maintenance intervals Various Various M&R
Diesel pumping sizing
Specific fuel consumption 0.24 Not used GLOBALFuel consumption Fitted curve Medium DP size & fuelPump element efficiency curve Fitted curve Small DP size & fuelRising main loss curve Fitted curve Small DP size & fuelRising main losses - non-linearity 5% Medium DP size & fuelWindage losses 10% Small DP size & fuelDerating 20% Small DP size & fuelLoad factor 70% Small DP size & fuelMinimum diesel engine size 2.6 Small DP size & fuelMaximum diesel engine size 16.8 Small DP size & fuel
GLOBALFinancial
Project life 20 Medium GLOBALDiscount rate 8.5% Small GLOBALLoan rate 11.5% Small GLOBALInflation rate 4.5% Medium GLOBALDiesel escalation rate 8.5% Medium GLOBALPercentage cost reduction between RWS & Private installation 50% Medium GLOBAL
Transport
Transport: Installation of diesel pump: Truck 9.00 Small GLOBALTransport rate for outsourced services 5.00 Medium GLOBALLocal transport rate to start diesel pump 3.00 Medium GLOBALPercentage trip costs for maintenance: RWS 100% Medium GLOBALPercentage trip costs for maintenance: PVP: Private 50% Medium GLOBALPercentage trip costs for maintenance: PVP: RWS 50% Medium GLOBAL
Technical
Rising main: 40mm: Maximum flowrate 3 Small GLOBALRising main: 50mm: Maximum flowrate 12 Small GLOBAL
Rising main: Percentage replacement 20% Medium GLOBALRising main: Additional % cost for lifting/reinstalling pipes 50% Medium GLOBALMaintenance interval for steel pipes 5 Medium GLOBAL
PVP factorsLorentz PVP 0% Medium GLOBALGrundfos PVP 0% Medium GLOBALTotal PVP 0% Medium GLOBALWatermax PVP 0% Medium GLOBAL