A Step Forward Toward Greener Diesel Grids

Transcription

1 SOLAR FUEL SAVER: A Step Forward Toward Greener Diesel Grids Xavier Juin Sales Manager Hybrid Systems

2 Content 1. The juwi Group 2. Solar Fuel Saver Motivation 3. General Working Principle of Fuel Saving Applications 4. Technical and Economical Analysis 5. Applications and Advantages

3 1. juwi Group

4 WE MAKE IT HAPPEN juwi at a Glance Organisation Founded in 1996 by Fred Jung and Matthias Willenbacher (juwi), pioneers for renewable energies with agricultural roots juwi AG is an owner-managed group of companies and not listed on the stock exchange Total capacity Around 3,100 megawatt (approx. 2,300 systems) Annual energy output Approx. 5.8 billion kilowatt-hours, corresponds to the annual power demand of around 1.7 million households Investment volume (since 1996) Approx. 6,0 billion Euro Employees & turnover Approx. 1,250 employees (worldwide) > 700 million Euro in 2013

5 Our Services: All about the Project Consulting & Acquisition Planning Development Financing & Sales Construction Management Operation & Service

6 juwi has installed over 3000 MW in more than 20 Countries Location: Lieberose, Germany, PV capacity: 71.8 MWp, various wind projects globally with 1250 MW

7 2. Solar Fuel Saver Motivation

8 Motivation / kwh The price for PV systems has decreased by more than 60% in the last 3 years Fuel costs for diesel generators are constantly rising Especially interesting for gensets in constant power applications Diesel Generator market: World-wide approx. 60 GW / year (at least 10 GW for SFS applications!) Today Time In many countries, PV-Diesel systems present an economically viable solution, already today. This effect will even increase in the next years.

9 Generation costs by diesel generators In most of the sunbelt countries, generation costs in diesel generator systems are > 0,30 / kwh Whereas generation costs of PV applications in the same area are < 0,15 / kwh

10 3. General working principle of Fuel Saving Applications

11 The Solar Fuel Saver (SFS) Solar power is directly injected into the diesel generator mini-grid Reduction of fuel consumption due to solar energy penetration No batteries are needed The SFS controller manages the solar power output according to the operation of the diesel generator 100 % 100 % 90% 30 % 0 % 0 %

12 Functionality shown on a realistic load curve The solar power reduces the power generated by the diesel generator. As soon as the generator reaches critical part load operation, the SFS controller reduces the power output of the solar plant.

13 Hybrid Systems Solar Fuel Saver Battery storage systems Solar Inverter Solar Inverter Battery Inverter (Bidirectional)

14 Customized Solution The SFS can be integrated in already existing systems Measuring equipment can easily be adapted and integrated

15 Spinning Reserve Option 1 - from the generator As long as all generators are running, they provide the spinning reserve. Individual generators cannot be switched off. If there is a cloud and therefore PVenergy breaks down, the generators can provide the needed energy.

16 Spinning Reserve Option 2 - from the battery Solar Inverter In this case, the spinning reserve has to be provided by the genset and the battery. Battery Inverter (Bidirectional) Needs to be verified individually if the additional expenses for the battery system are economical.

17 Balanced Load 0 % 85 % 100 % PRP = 1000 kw Min.30% = 300 kw Max PV = 700 kw 200 Total 600 kw Total 300 kw Total 900 kw 0 % 30 % 100 %

18 Unbalanced Load 0 % 21 % 100 % PRP = 1000kW Min.30% = 300 kw Max PV = 700 kw 50 Total 150 kw % 75 % 100 % Total 750 kw Total 900 kw

19 4. Technical and economical analysis

20 What makes a SFS project economically interesting High and constant loads during daytime Diesel generator is constantly running during sunshine hours Diesel generator as main power producer and not in standby or back-up operation Balanced electrical phases Stable grid conditions (frequency, voltage, power factor, ) Well-designed diesel systems, running >80% of their PRP (Prime Power) Rule of thumb: PV size is approximately 80% of max load (in kw)

21 High and low PV penetration High PV penetration Exess Energy High fuel savings Excess energy High CAPEX Low penetration More PV possible Less fuel savings Less CAPEX More potential possible

22 Production [kwh] General Result Overview Genset PV-SFS-System Example 1 MWp SFS in Philippines Generator power Minimal partial load ,00 [kw] Power PV System [kw] [%] Annual solar production [kwh] Opex Replacement period Replacement costs Fuel price Increase of fuel price Energy consumption Peak Load Project Lifetime Opex escalation Tax rate Discount rate 2. Technical Results [USD] Investment [USD] 4 [years] Opex PV [USD] [USD] Equity ratio 30,00 [%] 1,17 [USD/l] Lent term 10 [years] 3,00 [%] Interest rate (Initial) 10,00 [%] [kwh] [kw] Day with maximum solar fraction [kw] 1200 Diesel savings [l p.a.] [years] Average cost reduction [USD p.a 800 2,00 [% p.a.] ,00 [%] CO2 reduction 925,8 [t p.a.] 7,00 [%] :00 05:00 10:00 15:00 20: Monthly Average Electric Production 1. Input Data (Client) Day with minimum solar fraction [kw] 0 00:00 05:00 10:00 15:00 20:00 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

23 Economical Analysis 3. Economical Analysis Break-even after 4 years

24 Input Data for evaluation What do we need from you? 1. Filled-out SFS questionnaire (Attention: there are two questionnaires, a. Battery based hybrid systems and b. SFS ) 2. Most important: hourly data of load curve (for a typical day or for a typical period) The quality of our technical & economical evaluation corresponds to the quality of your data

25 5. Applications and Advantages

26 Applications Hotels and Resorts (typically 100 kw 2 MW) Daytime loads like air-conditioning, water pumping, Industry and Agriculture (typically 500 kw 20 MW) High solar fraction possible, due to consumption during daytime Mining Industry (> 2 MW) High suitability due to constant loads at quite high power output Own Consumption Market! (private sector) Residential Areas (typically 100 kw 20 MW) With relatively constant power demand

27 Your Advantages Save up to 50% diesel fuel in your application! Client with 24-hour constant load: SFS can reduce the fuel cost by 20% Become more independent from your diesel supply! Clients with insecure sources of fuel, remote areas, Reduce your LCOE! Adding solar to your diesel grid will bring down the levelized cost of electricity Achieve short payback periods with a low-risk investment! In sunbelt countries with a diesel price > 1 US$/liter, payback is between 3 and 6 years!

28 Solar Fuel Saver (Maldives, Kudahuvadhoo atoll) Description of the Systems Solar System 203,5 kwp poly crystalline PV-modules on 8 rooftops 3 Diesel Generators: 648kW, 600kW and 440kW Load: between 300 and 500kW Objectives This project is based on a Solar Fuel Saver technology which enables to reduce the fuel consumption of the minigrid of Kudahuvadhoo island. The power plant supplies the island mini-grid via medium voltage lines. The main consumers are residential households, small and medium-sized businesses and the local hospital. The project is part of the GIZ program to help the ministry of environment strategy for carbon neutrality. Realization The system was built by juwi and a local partner in 2014.

29 Solar-Wind-Diesel System (Egypt) Technical Data Solar System: 50 kwp Wind turbines: 50 kw (4 turbines with 13 kw) Battery: Ah / 48 V OPzS 4 Battery Banks Diesel Generator: 1140 kva, 1 x 350 kva Inverter concept: SMA AC-coupling with Sunny Islands Objectives electricity for the local pumps for irrigation. the batteries have enough capacity to store the produced electricity also for long sun- and windless periods. a plant to desalinate the salty ground water is also connected to the system Realization October of 2012 with our local partners.

30 Solar-Diesel Hybrid System (Namibia) Technical Data Solar system: 201 kwp Poly crystalline PV-Modules m² Free Field Installation Ah / 48 V OPzS Battery Bank Diesel Generators: 2 x 140 kva, 1 x 350 kva Objectives centralized solar PV system in Tsumkwe (ca. 600 km NE of Windhoek) supply the total day time demand of the village (incl. Telecom station, school and hospital) diesel generators will supplement the battery system and select the optimum generator to run each home is connected with a 11-kV line one line for essential loads (will not be disconnected), one as non-essential will be disconnected to prolong services to the essential loads Realization First half of 2011 with local partners. O&M contract for 5 years

31 Thank You! juwi international GmbH Xavier Juin