The Bokpoort: CSP Continuous Operator Success Story. Nandu D Bhula Chief Executive Officer Acwa Power Solafrica Bokpoort CSP South Africa

Transcription

1 The Bokpoort: CSP Continuous Operator Success Story Nandu D Bhula Chief Executive Officer Acwa Power Solafrica Bokpoort CSP South Africa

2 The Bokpoort CSP Busting Myths CSP with Adequate Storage: A new dawn in South Africa in Dispatchable, Load-Following, Renewables

3 Contents Bokpoort: Project Overview, Plant Layout, Technical Overview Thermal Storage and Base Load Capability Bokpoort Production Trends and Performance Records Review of Assumption on CSP in IRP 2010 South African CSP s: Capacity & Capability New Solar DNI Map supports CSPs Prospects for CSPs vs Old Coal Decommissioning Local Content & Knowledge prospects Proposed Way Ahead in CSP

4 The Overview of Bokpoort CSP Power Plant Project Overview, Layout, Capacity & Performance

5 Bokpoort CSP Project Overview Overview of Company and Project Founded: Ring-fenced project company effective June 2013 Site Location Site Coordinates: Latt. 28º S Long. 21º E Operational partner ACWA Power International: Saudi Arabian based with generation portfolio of 21GW and 2.4 million m 3 /day of desalinated water Total staff: ±1300 during Construction peak and 62 during Operations The site: Bokpoort Farm, 125km south-east of Upington (300 hectare Greenfield) Technology used: Concentrated solar thermal trough, with wet cooling and 1300MWht molten salt thermal energy storage (9.3hrs at 50MW) 20 year PPA with Eskom, through the Garona Substation located next to the site EPC - Project status Procurement and Suppliers: EPC consortium (Acciona, Sener, TSK, Crowie) 1 st Synchronisation 13 th November 2015 Early Operating Date 6 th February 2016 COD 19 th March 2016

6 Bokpoort CSP: Plant Layout CSP Parabolic Trough Technology with Storage Energy Source Rechargeable Battery Power Generation 50 MW Parabolic Trough CSP Plant: Wet Cooled Thermal Energy Storage = 9.3 hours at 50 MW (Largest in Africa) Offtaker is Eskom - Through the Garona Substation located next to the site 20 year PPA

7 Bokpoort CSP: Technical Overview Solar Field Eight Solar Fields Loops 48 Solar Collector Elements per Loop 8,640 SCEs Installed Flabeg Glass Mirrors 241,920 Mirrors 658,000 m2 of reflective surface SENER Trough Technology Schott Heat Collector Elements (25,920) HTF Dow Chemical (2,640 tons) Thermal Energy Storage 38,100 Tons of Salt (Potassium and Sodium Nitrate) Two Tanks Hot & Cold 40 m Diameter 14 m Height Bank Solar Energy during the day and release it at night or as needed Steam Generation Two Trains of Steam Generation Steam Supply (@ Turbine Inlet) Enthalpy kJ/kg, Steam Flow 60.0 kg/s Siemens Steam Turbine SST-700 Single Reheat (HP, LP) Siemens Generator

8 50MW Daily Demand Profile Bokpoort CSP: Capability with Thermal Storage CSP + Storage = Base maybe not yet but Load Following (depending on size) Without Storage With Storage Load Following Winter Peak Summer Peak 30MW 06:00 09:00 12:00 15:00 18:00 21:00 24:00 03:00 Hours of the Day Note: Not to Scale for Illustration Purposes only

9 Daily Production MWh Daily Production Performance Trends hrs Continuous Operation - Low DNI - 25 Mar 13 hrs 111 hrs Continuous Operation Low DNI 18-Mar 19-Mar 20-Mar 21-Mar 22-Mar 23-Mar 24-Mar 25-Mar 26-Mar 27-Mar 28-Mar 29-Mar 30-Mar 31-Mar Continuous Operation 161hrs Continuous Operation 111hrs 9

10 Record Performance in 1st Month of Production Period: 18 March :00am to 25 March :00am Record: 161 hours of Operation Continuously (Base Load 100%) Load Factor: 76% (based on Energy Sent Out) *Possibly World Record performance in 1 st month of commercial production - TBC Period: 17 March :00am to 31 March :00pm Record: 310/352 hours of operation (88% of time on Load) Load Factor: 66% (based on Energy Sent Out) Continuous Operation 161hrs Continuous Operation 111hrs 10

11 The Review of CSPs Capacity & Capability Assumptions in IRP 2010, Future Prospects for CSP

12 Review of IRP 2010 updated version (Nov2013) New CSP modelled to only start around 2030 (based on learning rate and Scenarios) Big Gas Scenario has no further CSP consideration All Scenarios have dependency on OCGT s with even new plant planned as early as 2022 CSP Plant with storage can contribute significantly but allocation now will accelerate Learning Rate for LCOE to reduce rapidly already better then OCGT CSP Plant are modelled as Peaking options only Assumption regarding lead time and Load Factor related to CSP with Storage need review based on Bokpoort Experience OCGT CCGT Wind CSP, Parabolic Trough CSP, Central Receiver PV 3hrs 6hrs 9hrs 3hrs 6hrs 9hrs Fx tilt Rated Capacity (MW) Life of Programme Typical Load Factor 10% 50% 30% 31% 37% 43% 32% 40% 47% 19% Lead Time CSP trough with 9hrs should be at least 60% LF and 3 years lead time Source: INTEGRATED RESOURCE PLAN FOR ELECTRICITY (IRP) UPDATE REPORT 2013

13 South African CSPs Capacity and Capability CSP Capacity Commissioning Schedule - Estimate KAX KHI BKP XIN ILG KTH RDN CSP1 CSP2 CSP3 Acwa Other Project Name: KaXu Solar One Khi Solar One Bokpoort Xina Solar One Ilanga I Kathu Solar Park Redstone Country: South Africa South Africa South Africa South Africa South Africa South Africa South Africa South Africa Location: Poffader Upington Groblershoop Pofadder Upington Kathu Postmasburg Upington Technology: Turbine Net Capacity: Parabolic trough Power tower Parabolic trough Parabolic trough Parabolic trough Parabolic trough Power tower CSP1 Power tower Status: Operational Operational Operational Under construction Under development Under development Under development Preferred Bidder Stage Start Year: Thermal Storage 2-tank indirect HP Steam Vessels 2-tank indirect 2-tank indirect Storage Capacity: Thermal Storage Saturated Molten salts Description: steam Peaking Grid Base/Load Peaking Peaking /Load Bokpoort Contribution CSP: A new dawn for Renewables Following South Africa acwapower.com Following 2-tank indirect 2-tank indirect 2-tank direct 2-tank direct 2.5 hours 2.5 hours 9.3 hours 5 hours 4.5 hours 4.5 hours 12 hours 7.5 hours Molten salts Molten salt Molten salt Molten salt Molten salt Molten salt Peaking /Load Following Base/Load Peaking Base Load Following

14 Prospects for CSP: Given Old Coal Decommissioning Food for Thought: Why not Swop Old Coal for New CSP (+ Adequate Storage) Alternatives Commodity dependent CSP Capacity Commissioning Schedule Estimate * CSP3 CSP2 CSP1 RDN KTH ILG XIN BKP KHI KAX ** **. Old Coal Fleet Capacity Decommissioning Schedule - Estimate * KMT9 KMT8 KMT7 KMT6 KMT5 KMT4 GVL6 GVL5 KMT3 KMT2 GVL4 KMT1 GVL3 GVL2 GVL1 CMD8 CMD7 CMD6 CMD5 CMD4 CMD3 CMD2 CMD1

15 New Solar Resource Maps in Support of CSPs By: Stellenbosch University, in cooperation with GeoSUN Africa and GeoModel Solar (April 2016) The highest DNI predicted in South Africa is now kwh/m2 per annum in the Northern Cape. The accuracy-enhanced database shows DNI values higher, up to 10% in some areas, compared the previous database, positioning South Africa as an excellent candidate for CSP power stations

16 The Review of CSPs Local Content & Industry Contribution Local Content Bokpoort, Prospects with greater Allcoation

17 Bokpoort Local Content: Competence & Knowledge Local Spend Analysis Total Estimated local value add (in ZAR) - Approx R1.6 Billion Large portion of Local value add in Civil works: Concrete, Reinforcing steel, structure steel etc. Main SA manufacturers Turnmill (Gauteng) HTF Expansion/Overflow Vessels MEAPSA (Upington) Salt Tanks (Thermal Storage) Made SA (Gauteng) Torque Tubes, Pylons for Solar Field TRP SA (Cape Town) - Torque Tubes, Pylons for Solar Field Approximately 8160 tonnes of steel for all Torque Tubes Approximately 1200 tonnes of steel for all Pylons SA Manufacturing and Pre-Assembly Steam Turbine Foundations HTF Vessels HTF Vessel Foundations HTF Vessels Main SA Pre-Assemblers and On-site Assemblers Proimtu (Upington) HTF Solar field piping CAMETO (Upington) HCE Stainless steal piping Condusav (Cape Town) HP Power Block Piping Batz (On Site) Solar Collector Elements SCE Torque Tubes SCE Pre-Assembly Total Estimated training performed hours, Safety Training 20% Small Tools Use 20% Job Training & Skills Specific Training 60% On Scaffold Use, Foundation Erection, Welding Setup, Electrical Cable Pulling & Termination, Salt Tanks SCE Pylon Fabrication

18 Possibilities that CSPs bring for Increased Local Content 60% 40% 20% 0% Round 1 Round 2 Round 3 Round 4 SA Market 100MW/y SA Market +200MW/y SA Manufacturing Infrastructure CSP specific Civil / Cooling Tower Valves & Actuators Pressure Vessels Collector Structure Storage Tanks Piping Cabling Other Parabolic Mirrors / Heliostats Collector Structure Precision Tracking Systems Receiver Pipes / System Heat Transfer Fluid W/S Cycle Engineering 35-40% 60-65% If CSP Market is + 200MW/year CSP Market Size means Economies of Scale Repeatability (e.g. collector structure)

19 Possibilities that CSPs bring for Increased Local Content. We need to have a long term view on CSP with Adequate Storage in SA given capabilities proven by current CSP s in operation: 1. Only storable renewable energy with utility scale Peaking and Base Load/Load Following Capability 2. Flexibility in dispatch meets SA demand profile 3. SA is blessed with an enviable Solar Resource 4. Short lead times for quick deployment possibility 5. Extremely competitive (LCOE Learning rate Round 1-4.5) 6. Existing SA manufacturing infrastructure complements CSP 7. Potential to increase local content whilst growing local competence and knowledge 8. Greater Socio-economic development for local communities

20 Thank you The Current discussions regarding alternatives for base and load following (mid-merit) grid requirements need to include the possibility of CSP with adequately sized Storage as a viable competitor. These plants are poised as Bokpoort CSP: significant A new dawn contributors for Renewables in to South the Africa technology mix going forward.