Presentation on theme: "Hovering Solar Concentrators A Low Cost Design for Large Scale Solar Power Generation By Dr. Brian Glassman."— Presentation transcript:
Hovering Solar Concentrators A Low Cost Design for Large Scale Solar Power Generation By Dr. Brian Glassman
Cost Per Installed Watt is Key Investing in a Solar power system is a business decision which must be financially justified Payback Time Return on Investment Total Cost Maintenance /Replacement Cost Being Green is nice, but it ultimately will not make solar popular as an alternative
Lower Cost Designs To be adopted by large utility companies, solar must compete against electricity prices generated by gas, coal, and oil. Current Solar Voltaic Cells are around –$2.5 per installed watt small quantities New gas, coal, and oil electric plants are: –Coal $2.0 to $3.3 per installed watt –LNG $1 to $2 per installed watt –Oil Fill in
Solar Concentrators Photo Voltaic –Thin Film –Thick Film –Concentrating Photo Voltaic Concentrating Solar Cells –Linear Concentrator SystemsLinear Concentrator Systems –Dish/Engine SystemsDish/Engine Systems –Power Tower SystemsPower Tower Systems
Components of Solar Concentrator Designs Dish/Engine Systems Mirrors Supporting Structure Individual Mirrors Individual Sterling Engine (Collector) Rotating Gimble & Heavy Motors Support Structure for Collector High efficiency, but expensive at $10 to $25 per installed watt The fundamental of the design will always make it expensive!
Dish/Engine Systems 1.Multiple or Curved Mirror Significant cost item 2.Mirror Supporting Structure 3.Heavy Motors and Gimble 2 axis Significant cost 4.Individual Sterling Engine Collector Significant cost 5.Support Structure for Collector Very Efficient, but to expensive to be considered for full scale power generation.
Power Towers (lots of design components) One large investment ($0.8 to 1.4 billion), highly efficient, but the number of components make it expensive! Large Expensive Tower Motors & Gimbles Mirror Support Structure Expensive Steam Generator Single Large Solar Collector Link
Components of a Power Tower 1.Large tower & Collector (single large expense) 2.Expensive Steam E/Generator (single large expense) 3.Large Mirror Array 4.Mirror Support Structure 5.Heavy Motors & Gimbles Power towers can greatly reduce installation cost by being placed next to an existing power plant and use that plants existing steam to electric generator
Solar Concentrators Cheaper Mirror Support Structure Cheaper Radiant Heat Concentrator Different Mirror Angles Require Multiple Motors Simple Support Structure Simple Flat Mirrors Getting better, but still many moving parts requiring motors
Solar Trough Arrays Mirror Support Structure One Axis Gimble with Motors Expensive Curved Mirrors Support Structure Cheap Collector Tubes
PV Arrays 2 axis gimble with Motors Expensive PV panels PV support Structure
Current Designs are Insufficient All current design have significant cost elements inherent to their design I.E. You can make them as cheap as possible, but they will still not break the $2 per watt barrier because of their base designs A new type of design is needed!
Move the Collectors! All designs assume the collector must stay stationary to the mirrors, but moving them makes the design cheaper! Morning Noon Late Afternoon
GreenVineSolars Design Collectors suspended by cables Fixed Mirror Angle of Light Rays Collectors Suspension Cable
GreenVineSolars Large Array (Called Hovering Solar) Collectors suspended by grid of cables Grid can translate and elevate
Components of Hovering Solar 1.Large tower & Collector 2.Expensive Steam Generator 3.Large Mirror Array 4.Mirror Support Structure 5.Heavy Motors & Gimbles 6.Light Motors to move collectors 7.Multiple or Curved Mirror 8.Mirror Supporting Structure 9.Rotating Motors and Gimble 2 axis 10.Individual Sterling Engine Collector 11.Support Structure for Collector
Components of the Hovering Solar Design 1.Solar collectors 2.Cables to suspend collectors 3.Support structure for cables 4.Motors to move cables & collectors 5.Flat Mirrors 6.Steam Turbine (if using Radiant heat collectors) 7.DC to AC converters (if using PV cells collectors)
Mirrors Because the mirrors do not move they can be made out of cheaper materials –Aluminized sheet metal –Cheap glass mirrors –Cheap polycarbonate mirrors –Stretched aluminized fabrics
Collectors Different types of collectors can be used Radiant heat collectors –Generates steam (phase change) –Heats gas or other fluid Photo Voltaic –But one must be careful not to over heat PV cells.
Applications Utility companies Large Scale Power Generation –(100+ MW class) Medium size power generation –(5 to 100 MW class) Large factories with sufficient land Small utility companies Will not work well in: Urban or City Environments Areas of heavy snow fall or high wind
Utility Applications Supplement utilitys electrical production Can use existing steam turbines
Contact Information Currently Looking to License this technology to installers or researchers Dr. Brian Glassman All information of this presentation is copyrighted ( ) all rights reseved