a hybrid case study luis fariza navarro tariff : 50 rs/litre fuel inflation : 7% per year grid...

© 2011 SunPower Corporation


Competitiveness & Economics

17th October 2012

A hybrid case study

Luis Fariza Navarro


Powering a new concept: PV Hybrid solution

Finding the good energy mix


3

Value Added of Solar Energy

OIL PRICE VARIATIONS

Sun is immediate and unlimited source of energy

Sun delivers the equivalent 10,000 times the world energy consumption

Reliably predictable source of energy (statistical database) compared to other green power supplies

Solar PV is time tested technology

Remote locations with difficult fuel delivery

Hazardous energy OPEX due to highly variant fuel price and fuel theft

States expectancies toward contribution of majors to the development of environmental consciousness

Source: Prixdubaril.com

3


4

Why a hybrid solar PV generator?

Mixing power sources to optimize energy according to a specific load profile and strong seasonal effect

Technical and economic optimum (peaks of load and strong seasonal effect)

Find an optimum LCOE on a bounded economic time

Hybrid system

100% solar PV100% diesel

generator + grid

CAPEX: ++

OPEX: - -

Lower LCOE @ ∞

CAPEX: - -

OPEX: ++

Higher LCOE @ t0

Hybrid solutions enable the revamping of existing power

sources with a global energy solution

4


5

Why a hybrid solar PV generator?

Hybrid system

100% solar PV100% diesel

generator + grid

CAPEX: ++

OPEX: - -

Lower LCOE @ ∞



5

CAPEX: - -

OPEX: ++

Higher LCOE @ t0

It: Investment expenditures in the year t.

Mt: Operation & Maintenance expenditures in the year t.

Ft: Fuel expenditures in the year t.

Et: Electricity generation in the year t.

r: Discount rate

n: Life of the system

LCOE


6

Potential Sectors

Commercial

Industrial

Telecom

Hotel

Mine Industry

…



6


SunPower

Finding the right product


Why efficiency matters?

High efficiency More power per sqm

High efficiency panel Conventional efficiency panel

1

2

Maximise system size

High efficiency Lower installation, rent & maintenance cost per watt

8

3 High efficiency Better LCOE !


More energy for more revenues in same roof space

9

Yearly production simulation – Delhi, India, 1,500 m2 roof surface

213 kWp

760 multi-Si 280 Wp Panels

30° Fixed Tilt Racking System

239 kWp

920 mono-Si 260 Wp Panels


298 kWp

910 SPR-327 Panels


556 MWh

402 MWh349 MWh

Up to 160% more output

SunPower20.1%

Mono-Si16 %

Multi-Si14.4 %



10

Yearly production simulation – Mumbai, India, 3,000 m2 roof surface

200 kWp

1386 Flexible Thin Film 144 Wp

Tilt 0°

478 kWp

1840 Conventional 260 Wp Panels

Tilt 0°

600 kWp

1836 SPR-327 laminates

Tilt 0°

909 MWh

663 MWh270 MWh


SunPower20.1%

Conventional16 %

Membrane6.8 %


11

Yearly production simulation – Mumbai, India, 3,000 m2 roof surface

281 kWp

3122 Thin Film 90 Wp

Tilt 0°

478 kWp

1840 Conventional 260 Wp Panels

Tilt 0°

600 kWp

1836 SPR-327 laminates

Tilt 0°

909 MWh

663 MWh411 MWh


SunPower20.1%

Conventional16 %

Thin film10 %



14

Conventional SunPower Rooftop 327W

PanelPanel

BOS

BOS

InstallationInstallation

Fixed Costs

Fixed Costs

Co

sts

/Wa

tt

Higher efficiency = lower CAPEX + lower OPEX Better LCOE

Why efficiency matters?


Hybrid systems

Case study


Existing architecture

AC

Building loads

Building AC

Distribution box

Energy flowBackup

switch

Diesel Generator back up

No energy transferred to the grid

18


Case study assumptions

Building

Type of building : Commercial building – food retailer

Max Connected Load : 100 KW (lighting/ fan/ air conditioners…)

Main power Supply : Grid supply

Back-up Supply : Diesel Engine (no UPS / no batteries)

Diesel generator type : Kohler / SDMO J130K

Roof Area : 1000 sqm

Location : Delhi

19

Electrical data

Grid availability : 16 hours/ day

Backup generation : 5 hours/day

PV generator size : 91 KWp

Economic data

Grid tariff : 6 Rs/kWh

Diesel tariff : 50 Rs/litre

Fuel Inflation : 7% per year

Grid Inflation : 5% per year

Man-hour inflation : 10% per year

Actualisation rate : 10% per year

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.0% 20.0% 40.0% 60.0% 80.0% 100.0%Genset Power (P/Pnom)

Fuel Consumption [L/kVA/h]


Proposed architecture

AC

Building loads

Building AC

Distribution box

Energy flowBackup

switch

Grid

Inverter

Power control

monitoring

DC

91 kWp

Pure auto-consumption generator

No energy transferred to the grid or the generator set

20


Load Vs Production profiles

1 – PV production during main power cut-off (generator set is running)

2 - PV production during normal operation (generator set is off)

21


-0.50

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

Millio

ns $

Cumulated Saving NPV ($) w/o PV Cumulated cost ($) Cumulated cost w PV ($)

Case study outputs

22

Payback without

actualisation

Payback with

actualisation


Thank you!

Questions?

a hybrid case study luis fariza navarro tariff : 50 rs/litre fuel inflation : 7% per year grid...

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