CSP Summit USA. San Francisco 29 January Bill Gould Chief Technical Officer Solar Reserve, LLC

Transcription

1 CSP Summit USA San Francisco 29 January 2008 Molten Salt Power Towers Bill Gould Chief Technical Officer Solar Reserve, LLC

2 Bill Gould, Chief Technology Officer, Solar Reserve Formerly Bechtel s Project Manager at Solar Two. Discussion: Who is Solar Reserve? Why is Solar Reserve commercializing the Solar Two, power tower concept? Why is Solar Reserve using molten salt instead of direct steam generation? 2

3 Solar Power Tower with Energy Storage 1. Sunlight is concentrated and directed from a large field of heliostats to a receiver on a tall tower 4. Molten salt is pumped from the hot salt tank through a steam generator that in turn creates steam that turns a turbine and generates electricity 2. Molten salt from the cold salt tank is pumped through the receiver where it is heated to 566 C 3. The heated salt from the receiver is stored in a hot salt tank 5. Cold salt at 288 C flows back to the cold salt tank Central Receiver Power Tower Heliostat Storage Tanks 3

4 Solar Reserve Enables Project Development Technology License Guarantee/Warranty Engineering Investment Capital for Detailed Design Operating (Seed) Capital Project Development 4

5 Hamilton Sundstrand Rocketdyne Solar Power System Design - ISS 13A.1 Mission (STS 118) 5

6 50 Years of Rocketdyne Engines 1585 Launches ACTIVE Atlas Saturn Saturn Space Delta Atlas Delta Redstone Navaho Jupiter Thor I/II I/1B V Shuttle I/II/III III/V IV Note: An additional 17 Titan IV launches included Centaur-T upper stages powered by PWR RL10 engines 6 Last updated: 3 December 2007

7 Solar Two Molten Salt Demonstration Plant Daggett, California 1926 heliostats 42 MWt receiver 10 MWe turbine 3 hrs molten salt storage 300 ft tall tower (top)

8 SolarReserve - Overview SolarReserve is a technology provider, developer, and owner of Concentrated Solar Power (CSP) projects. SR has the exclusive license to market Rocketdyne solar projects. SolarReserve is a collaboration between: United Technologies Corporation - a $65 billion diversified company who will supply ppy and guarantee the breakthrough molten salt power tower technology. UTC s subsidiary, HS Rocketdyne, will design and manufacture the critical component US Renewables Group, LLC - a $575 million private equity firm formed to invest and manage a portfolio of renewable power and clean-fuel assets. 8

9 Solar Two Molten Salt Demonstration Plant Solar Two was shut down in April,

10 Solar Two Molten Salt Demonstration Plant Solar Two was shut down in April, Why was it shut down?

11 Solar Two Molten Salt Demonstration Plant Solar Two was shut down in April, Why was it shut down? Did it work OK?

12 DOE-Utility Consortium Collector Fields were Demonstration Only 12

13 Solar Two Demonstrates Clean Power for the Future Over the three-year operating lifetime, daily operation of Solar Two became relatively routine, with various performance records broken on a fairly regular basis. Sunlab Snapshot, SAND , March,

14 Solar Two Demonstrates Clean Power for the Future The 10 Megawatt Solar Two power tower pilot plant near Barstow, California, successfully completed operations o in April, 1999, having met essentially all of it s objectives. (Sunlab Snapshot, SAND , March 2000) 14

15 Market Conditions i Were Not Favorable in 1999 Fossil fuels were cheap, No solar premiums were available, No tower developer would provide a performance guarantee, Non-recourse loans could not be obtained for a power tower. 15

16 1970s Early Studies Sodium Panel Test Rocketdyne Receiver Development History high flux panel to 1500 suns Solar One World s largest water/steam receiver Demonstrated surround receiver concept PWR IR&D Developed the molten salt receiver design used for Solar Two Solar Two Built world s largest salt receiver PWR Advanced Panel Tested to 1600 suns intensity Alt material testing performed Simplified header design PWR/HSR IR&D Developed inward header design 06PD Large Receiver Design and Risk Study Large panel design IR&D + Contract (pending) 2008 Comm l Risk Reduction Testing & Demo Fabrication Water flow Testing Just awarded + IR&D UTC Proprietary DOE Panel Test DOE Pump/Valve Test Test in salt and sun 16

17 Direct Steam Versus Molten Salt Rocketdyne is one of the few companies who can say they have tried both direct steam and molten salt. Solar One Solar Two

18 Direct Steam Versus Molten Salt Rocketdyne is one of the few companies who can say they have tried both direct steam and molten salt. Direct Steam Solar One (Direct Steam) Solar Two

19 Direct Steam Versus Molten Salt Rocketdyne is one of the few companies who can say they have tried both direct steam and molten salt. Direct Steam Solar One (Direct Steam) Solar Two (Molten SALT Salt) Which fluid was best? Why? 19

20 Just a Little White Cloud Picture of a cloud 20

21 Dependable Renewable Power Sunlight Thermal Energy Is Stored in Molten Salt nergy En Constant Power Output Noon Midnight Noon Midnight 21

22 Solar Two Thermal Storage Tanks ~ 35 ft diam. and 30 ft tall each Cold Hot UTC Proprietary 22

23 Direct Steam Requires Thicker Pipe Walls Picture Tube tube wall thickness US RENEWABLES GROUP CONFIDENTIAL

24 Design Innovations From the Solar Two Design Salt circuit metallurgy Salt valve type and packing strategy, Steam generator internals and steam drum, Salt pumps suspended in the salt tanks, Eliminated pump sump tanks, Slip formed concrete tower, High Performance Heliostat, Third generation (3G) receiver with many proprietary changes. US RENEWABLES GROUP CONFIDENTIAL

25 Cost Reductions Implemented Original Pricing Lower finance costs Guarantees, warrantees, and liquidated damages Increase project scale Multiple Project Amortization of non-recurring Optimize Storage for Maximum Revenue TOD Pricing Market Price Reference March 07 March 08 25

26 Storage and Turbine Sized to Customer Needs Larger Turbine Po ower (MWe) Flexible Reference Solar Plant Design 600 MWe 4 hrs/day 300 MWe 8 hrs/day 500 GWh per year ~ Two Sq Mile 200 MWe 12 hrs/day Rocketdyne already under contract with a major International Utility MWe 16 hrs/day 100 MWe 24 hrs/day Smaller Turbine Time of Day Pricing Full Power Operation (hours) Increased Capacity Factor 26

27 Power Towers are Ready Now Molten Salt Power Towers is game-changing technology 500+ MW t Receiver under design Can be tailored for time-of-day pricing Peaking or 24/7 Capability High power quality - steady vs. fluctuations (Wind) 100% renewable energy - No natural gas required Power Tower technology and performance fully demonstrated Performance Guaranteed / Warranted by United Technologies Pricing Competitive and Stable More competitive with increased size and TOD optimization SolarReserve has exclusive worldwide rights to the UTC design 27