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Reducing Risk through Reliability: Providing Solar Trackers in Desert Conditions
Intersolar Middle East, Dubai
Tracking improves solar asset value
Solar trackers compared to fixed-tilt
Tracking increases the energy production of a solar system by nearly 20%
Energy values increase due to alignment with demand through broader generation curve
~20% increase in production
Project ROI is increased and project LCOE is reduced due to ~20% higher energy return for
only ~10% project CAPEX increase
+8-10% System CAPEX
+18-25% Power
GenerationTrackingFixed Tilt Afternoon
Demand Peak
ARRAY HAS INSTALLED +20,000 KILOMETERS OF TRACKERS
“Array has the most extensive track record of any PV tracker vendor.”
– Greentech Media Research, Global Tracker Landscape Report 2017
Dubai, UAE
Boston,USA
Vast experience provides timeless reliability
16,000+ MW Years of Operation
Array’s trackers operate flawlessly in desert-type conditions
• Low-latitude desert• Ambient temperatures up
to 46°C• Presence of dust• High UV exposure• Hot, dry summers very
similar to MENA desert climate
The vast majority of Array’s 7GW of operational capacity is in desert-like conditions in Southern California, Arizona, Nevada and Texas
Tested and Approved for Desert Environments
• IEC 62817 tracker certification• 480 hour test• Exposed the tracker to
fine dust • Cycled the temp -30 to
60 C while running • Confirmed - NO
operational change• Array has decades of
desert experience
Industrial-type motor; dust & UV-proof, no batteries
• Highest quality AC motor, industrial grade
• Only one motor per almost 1MW!• Sealed and lubricated for life• Double viton seals, enclosed to be
protected from UV• Extremely wide temperature range –
unlike battery-based technologies
The motor is the heart of your system!
Batteries in the Desert to Keep Your Asset Safe?
• Unlike Array, all other trackers rely on electrical stow
• Batteries are essential for other trackers to stow
• Charge capacity is greatly reduced above 40°C ambient
• Charging at temperatures below 0°C and above 50°C may cause damage
Mechanical wind mitigation; safe in any climate
Array’s unique wind management solution
• No reliance on temperature-sensitive batteries, no UPS
• Elimination of vulnerable communication chain (7 links!)
• Designed for full site wind speed at all tracker angles
• Not subject to torsional galloping
Why Array Technologies?
Thank you.
Martin MitscherDirector International Sales and Business Development, Array Technologies, Inc. [email protected]
Pioneering role in tracker market dynamics
8%
72%
2006 2016
U.S. Single-axis tracking market share in ground-mount projects
[2016 data based on GTM Global Tracker Landscape Report 2016]
• Array pioneered the US utility market transition from fixed rack to single-axis tracking
• Lenders and asset owners needed to be convinced of tracker viability
• Primary concerns to address: Reliability, O&M, failure risk
• Primary target to achieve: Reduce LCOE
Challenges in transition fixed tracked
Optimize LCOE
Minimize Operational & Financial Risk
Maximize Asset Value
Our Experience. Your Advantage.
1991First Solar Powered Tracker with Battery Back-up
1985Wattsuncorporation founded
2006First Flexibly Linked Rotating Driveline Tracker
1992WattsunCorporation becomes Array Technologies, Inc.
1993First Active Closed-Loop Tracker Patent Issued
2008First Tracker Bankability Report
2002First Individual Row Driven Single-Axis Tracker
2015V3 Launch: • First Single Bolt
Module Clamp• First Zero Scheduled
Maintenance Tracker
• First Torsion Limiter Load Stabilizing Tracker
2016Array Introduces New v3 Features:• Flood-plain ready vertical
mount motor• 90 module rows for 1500V
systems• CAB integration
2017Array Introduces: • First Quick
Disconnect Driveline
• First 62° ROM Tracker
Venture into the Future of Tracking
Decreased install cost, time, and complexity
Accommodation of new PV module
technology
Optimized modular
building blocks
Monitoring and diagnostics
Robotic cleaning
What’s Next?
Extended environmental
range of operation (wind, snow,
corrosion, temperature)
Customized designs for
low-load environments
Unique, flexibly linked architecture
• Unique single-bolt clamp• Standard fasteners &
installation tools• Octagonal torque tube for
easy, robust connections
• Extreme terrain flexibility• Only 1 motor per ~1 MW• Proven, industrial-grade
components• Drivetrain lubricated and
sealed for life
• Flexibly linked, rotating driveline with articulating u-joints
• New: Quick release detachable driveline
200 × Lower Unscheduled O&M Cost
With Array:1 repair/year for 100 MW site, and far fewer truck rolls
With Decentralized Trackers:765 repairs/year (2 per day) for 100 MW site, and far more truck rolls
600 × fewer number of service hours
Based on 3rd party data from TÜV
7% Lower Scheduled Lifetime O&M Cost
Optimized solutions for vegetation management and module cleaning• 50% less frequent mowing due to higher module clearance • 6% less area to maintain due to higher module density – NO GAPS!• NEW! Quick disconnect driveline• Robotic module cleaner ready Zero scheduled tracker maintenance
Robotic module cleaner ready
Array = high density and no gaps, robotic cleaner compatible
Competitor tracker has gaps and protrusions throughout
Based on 3rd party data from TÜV
How Array Prevents Catastrophic Failure
Reliable Wind Design
• Designed for full site wind speed at all tracker angles
• Proven mechanical wind management vs. electrical stow with 7 complex links in the chain
• Mechanical wind management not subject to torsional galloping
Highest Structural Integrity
• 12 gauge steel, conservative torque tube spans under 8m long
• Octagonal torque tube – easy, robust connections not subject to fatigue like pin connections
• Robust design avoids stress and damage to modules related to torsional galloping
Best-in-class uptime
28 Years of Learning & Innovation
Only 150 for 100 MWFewest Failure Points
Zero Scheduled Maintenance for 30 Year Life
Our streamlined design is forged from decades of experience
Eliminate human error
99.99%Uptime*
Compare to decentralized tracker alternative which introduces a perpetual state of maintenance, reducing uptime and deteriorating performance.
*Data provided directly from an Array customer’s monitoring system, tracking a conglomerate of sites totaling +300 MW
7% Lower LCOE
CAPEX
Highest uptime in the industry delivers
maximum energy production
Production
OPEX
Streamlined installation and commissioning reduces time onsite
and saves upfront cost
The lowest scheduled and unscheduled O&M achieves the highest savings
7% Lower LCOE
Based on 3rd party data from TÜV
300 ×Less Likely to Experience Catastrophic Failureunder rated conditions.
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