Solar & Diesel Water Pump Costing Tool 2006 Ver 1

7/27/2019 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 components

Part 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

Documents

Solar & Diesel Water Pump Costing Tool 2006 Ver 1