Presentation on theme: "Hovering Solar Concentrators A Low Cost Design for Large Scale Solar Power Generation By Dr. Brian Glassman."— Presentation transcript:
1Hovering Solar Concentrators A Low Cost Design for Large Scale Solar Power Generation ByDr. Brian Glassman
2Cost Per Installed Watt is Key Investing in a Solar power system is a business decision which must be financially justifiedPayback TimeReturn on InvestmentTotal CostMaintenance /Replacement CostBeing Green is nice, but it ultimately will not make solar popular as an alternative
3Lower Cost DesignsTo 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 quantitiesNew gas, coal, and oil electric plants are:Coal $2.0 to $3.3 per installed wattLNG $1 to $2 per installed wattOil Fill in
4Solar Concentrators Photo Voltaic Concentrating Solar Cells Thin Film Thick FilmConcentrating Photo VoltaicConcentrating Solar CellsLinear Concentrator SystemsDish/Engine SystemsPower Tower Systems
5Components of Solar Concentrator Designs Dish/Engine SystemsIndividual Sterling Engine (Collector)Mirror’s Supporting StructureSupport Structure for CollectorIndividual MirrorsRotating Gimble & Heavy MotorsHigh efficiency, but expensive at $10 to $25 per installed watt The fundamental of the design will always make it expensive!
6Dish/Engine Systems Multiple or Curved Mirror Significant cost item Mirror Supporting StructureHeavy Motors and Gimble 2 axis Significant costIndividual Sterling Engine Collector Significant costSupport Structure for CollectorVery Efficient, but to expensive to be considered for full scale power generation.
7Power Towers (lots of design components) LinkSingle Large Solar CollectorLarge Expensive TowerExpensive Steam GeneratorMirror Support StructureMotors & GimblesOne large investment ($0.8 to 1.4 billion) , highly efficient, but the number of components make it expensive!
8Components of a Power Tower Large tower & Collector (single large expense)Expensive Steam E/Generator (single large expense)Large Mirror ArrayMirror Support StructureHeavy Motors & GimblesPower towers can greatly reduce installation cost by being placed next to an existing power plant and use that plants existing steam to electric generator
9Solar ConcentratorsCheaper Mirror Support StructureCheaper Radiant Heat ConcentratorSimple Flat MirrorsSimple Support StructureDifferent Mirror Angles Require Multiple MotorsGetting better, but still many moving parts requiring motors
10Solar Trough Arrays Mirror Support Structure Cheap Collector Tubes Expensive Curved MirrorsOne Axis Gimble with MotorsSupport Structure
112 axis gimble with Motors PV ArraysExpensive PV panelsPV support Structure2 axis gimble with Motors
12Current Designs are Insufficient All current design have significant cost elements inherent to their designI.E. You can make them as cheap as possible, but they will still not break the $2 per watt barrier because of their base designsA new type of design is needed!
13Move the Collectors!All designs assume the collector must stay stationary to the mirrors, but moving them makes the design cheaper!MorningNoonLate Afternoon
14GreenVineSolar’s Design Collectors suspended by cablesCollectorsSuspension CableAngle of Light RaysFixed Mirror
15GreenVineSolar’s Large Array (Called Hovering Solar) Collectors suspended by grid of cablesGrid can translate and elevate
16Components of Hovering Solar Large tower & CollectorExpensive Steam GeneratorLarge Mirror ArrayMirror Support StructureHeavy Motors & GimblesLight Motors to move collectorsMultiple or Curved MirrorMirror Supporting StructureRotating Motors and Gimble 2 axisIndividual Sterling Engine CollectorSupport Structure for Collector
17Components of the Hovering Solar Design Solar collectorsCables to suspend collectorsSupport structure for cablesMotors to move cables & collectorsFlat MirrorsSteam Turbine (if using Radiant heat collectors)DC to AC converters (if using PV cells collectors)
18MirrorsBecause the mirrors do not move they can be made out of cheaper materialsAluminized sheet metalCheap glass mirrorsCheap polycarbonate mirrorsStretched aluminized fabrics
19Collectors Different types of collectors can be used Radiant heat collectorsGenerates steam (phase change)Heats gas or other fluidPhoto VoltaicBut one must be careful not to over heat PV cells.
20Applications Utility companies Large Scale Power Generation (100+ MW class)Medium size power generation(5 to 100 MW class)Large factories with sufficient landSmall utility companiesWill not work well in:Urban or City EnvironmentsAreas of heavy snow fall or high wind
21Utility Applications Supplement utility’s electrical production Can use existing steam turbines
22Contact InformationCurrently Looking to License this technology to installers or researchersDr. Brian GlassmanAll information of this presentation is copyrighted ( ) all rights reseved