NorthWestern Energy Group, Inc. · NASDAQ:NWE
NorthWestern Energy — Technical Presentation (November 2017)
13 slides from NorthWestern Energy's technical presentation, Nov 29, 2017
Slide 1: Liquid Air Energy Storage (LAES)
NWE Electricity Supply Resource Technology Forum Liquid Air Energy Storage (LAES) Gene Larson, SNC Lavalin Matthew Barnett, Highview Charlie Ricker, MADA Power VP, Project Development Business Development Dir. President November 29, 2017
Slide 2: The REAL Problem – Intermittent RE, Wind & Solar PV
The REAL Problem – Intermittent RE, Wind & Solar PV Wind BLUE Solar Yellow Demand Red BPA 30 Days April 2010
Slide 3: Liquid Air Energy Storage - LAES
Liquid Air Energy Storage - LAES Conventional Equipment Used in an Unconventional Manner 1. Charge 2. Store 3. Discharge Off Peak or Curtailed RE Liquid Air stored in tanks Pressurized Liquid Air is produces Liquid Air. # of Tanks = discharge duration evaporated and heated to power the expansion tur
Slide 4: Simplified LAES Cycle Diagram
Simplified LAES Cycle Diagram
Slide 5: Indicative Layout for a 20MW/80MWh System
Indicative Layout for a 20MW/80MWh System
Slide 6: Major Equipment Suppliers for LAES
Major Equipment Suppliers for LAES 8 x 25MW High grade turbines Cryo pumps cold storage Evaporators 2 x 7,000 tonne liquid air tanks 4 x 2,500 tpd liquefiers Heat storage
Slide 7: Integrated Energy Storage
Integrated Energy Storage State of the Art • 5 MW, 15 MWH commercial demonstration unit at Pilsworth, N. Manchester in the UK, commissioning now, COD Feb 2018 Size, Scope and Penetration • 10 – 200 MW • 40 MWH – 1.2 GWH • Firm wind, transmission deferral How would you use it in MT? • Working in MT f
Slide 8: Integrated Energy Storage
Integrated Energy Storage Specific Products? • Energy & Capacity – Behaves just like a rotating machinery asset • Frequency Response – Combined with short term BESS (ramp hider) • Voltage Regulation and KVAR Support – Utility scale rotating generator • Spinning Reserve – Standalone using “SpinGen” t
Slide 9: Integrated Energy Storage
Integrated Energy Storage Cost of Ancillary Services? • These need to be modeled and vary between standalone LAES and Integrated Energy Storage systems (co-located with a gas peaker unit) Fixed costs per MW-month • These need to be modeled and depend on site specifics such as charging rate, discharg
Slide 10: Integrated Energy Storage
Integrated Energy Storage Estimated reliability/availability? • Based on significant historical data on the key components, we estimate 18 days per year off line to perform maintenance which implies 95% availability. Again, years of operational data exists on all major components. Estimated capacity
Slide 11: Benefit Summary – NorthWestern Energy
Benefit Summary – NorthWestern Energy NWE’s wind RE from 8% of nameplate capacity to 35% Delivers wind RE on demand, no curtailment Effective NHR • 8500 Btu/kWh typical Peaker • 3400 Btu/kWh Hybrid 60% reduction in gas YES WE CAN! consumption But only with utility scale storage
Slide 12: How do you do that?
How do you do that? Highview/ MADA/ GE/ SNCL Hybrid Peaker with LAES Component HR, HHV Implied HR Heat Rate Model: MWH Weighting Btu/kWh combined system Total MWH Generated 195,700 100% 3,404 Total MWH Generated from LM6000 69,900 36% 8,500 Total MWH Generated from gas firing of PRU 6,000 3% 12,000
Slide 13: BESS Rapid Response + LM6000 & LAES Ramp Rates
BESS Rapid Response + LM6000 & LAES Ramp Rates 80 70 60 50 BESS 40 LM6000 30 LAES LM6000+LAES 20 10 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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