Solar ring[edit | edit source]

Ancient concept of fresnel mirrors which seems to get patented over and over again replaces Fresnel and trough designs. The Ring-Array Concentrator (RAC) is an ultra-powerful optical lens based on an array of nested ring reflectors. This patented design is completely free from the light-dispersion effects of conventional refractive lenses which allows for obtaining much higher efficiencies and concentrations for a broad range of electromagnetic energy spectrum. RAC forms a high-power beam on its rear side which can be ideal for many solar solar applications including high-concentration PV modules, electric generators based on Stirling heat engines, high-heat furnaces, hydrogen production, material processing, etc.

They claim it was patented , but the patent can't be found yet. There was a similar patent using rings but it expired in 2000. The rings were level, in the design the rings rise up gradually. See Sasecurity#Energy for more pictures. Concave slats instead of parabolic through design and Viktor holds one patent on solar energy(expires Dec.2021) . The major advantage of this design is that blinding of aircraft isn't possible as with parabolic trough and Heliostat Mirrors. Nersa doesn't want to become irrelevant and will will gang up with the CAA using this issue as a pretext to prevent their demise. four fresnel lenses for pool heating

solar video 12kwh[edit | edit source]

Melting molten salt large mirror array with gaps in between, known as a Fresnel mirror array - FMA. Idea lifted from Teton solar(Redrok solar links). Construction is a flat square(4x4m) divided into grids with square tubes. Each individual square mirror(silicon glued to a metal bracket mounted on a 1/4inch diameter, 20cm length threaded bolt) is focused in turn on a central focal point by bending each bolt with a bending tool. The bolts are spaced down the length of each tube a set distance between each other. A counter balance behind the mirror array is made with suitable weight(sleeper wood). The mirror array and counter balance pivots on a large triangular base(1m height) in the video. Focus on a pulse boiler

This focused energy heats a steam boiler with 12 gallons of water to 430PSI. In the video the steam drives a two piston steam engine from Steam_Engines3#Mike_Brown_solutions that turns a 12Kwh generator. Mike Brown also sells plans for a mini-steamplant to recycle the hot vented steam from the steam engine.

A white bent shroud metal reflector is placed on top of the boiler to reflect back rays onto the boiler that escaped past it. Ideas for the construction were taken from

A single heat absorbing element like a boiler(solar tower) as shown in the video is preferred above the parabolic trough idea. Troughs are difficult to make.

Hydrogen is produced with the 12Kwh generator for a FuelCell which can be used to build an electric car.

Salt melting assembly[edit | edit source]

moved to Thermal storage

cooking[edit | edit source] cooking design, water heating

peswiki[edit | edit source] University research Stirling engine plans

Solarfire parabola[edit | edit source]

moved to Solarfire

Solar Trough Water Heater by George Plhak[edit | edit source]


DIY tracking solar parabolic heater

Description of a self built solar tracking parabolic trough water heater by the designer/author. Detailed plans are offered. Made mostly with local materials and common shop tools:

Author's blog about the project:

Timelapse videos of the system in operation:

Frequently asked questions:

Solar trough by Sonca[edit | edit source]

Solar Cooling System

Q: How does Solar Cooling System work?

A: Solar Cooling System works on WATER - AMONIA liquid.

Q: What is the efficiency of Solar Cooling System?

Solar island[edit | edit source][edit | edit source]

Issue 105 Home Power Magazine. How to build a 1200F solar coffee bean roaster. Certainly one of the highest and best uses for solar power![edit | edit source]

solar energy magazine

books on solar[edit | edit source]

sunseeker[edit | edit source] video shows a grid of small fresnel lenses in one large block all focused on small PVC cells. This is a better solution than stirling engine because a stirling is only 4x more efficient than unconcentrated PVC cells.

Sunseeker Energy has established itself as an ethical green business committed to developing new generation solar and hybrid power technologies for sustainable energy use throughout the world.

Sunseeker Energy's Concentrator Solar Transducer Systems are more powerful yet they are also more energy efficient than conventional flat panel solar energy units. Conventional flat panel products operate at efficiencies far lower than concentrator systems, with a typical figure being in the order of 15%. Sunseeker Energy concentrating photovoltaic solar collectors have been independently verified at efficiencies up to 38%. producing 300 Watt/Square meter of pure power. Here's the Press Release:

OPTIONS[edit | edit source]

Place the SoharaDotOrg or -------- on residential roofs, focusing the light on water cooled PV cells. PV cells combined with concentrated sunlight are more efficient than StirlingEngine. Stirling Engines are four times as efficient as unconcentrated PV cells, but won't work with hazy weather, where PV cells will still operate. After sunset Stirling engines are used to generate electricity from hot oil as per Residential water heating with Fresnel lens.

The heliostat has 8 mirros the 9th center mirror is removed for a clamp. The mirror steering electronics design are from

  • The heliostats with bended square mirrors inside.
  • 2cm air gaps between individual mirrors to reduce wind loading.
  • Much less torque and motor size needed to focus helio stat mirrors.
  • Focus an array of heliostats onto a parallel FresnelLens which in turn channels the energy into a fiber cable.
  • A collection of 8 mirrors are steered by the drivers and not every single mirror needs to be manipulated.

Genei Interlocking solar Concentrator and Stirling Engine[edit | edit source]

Genei "Solar Eye" Concentrator Dish powers a Stirling Engine for electric generation. Target ring temperature 450 to 500 degree temperature with Stirling engine running. For large scale utility generation, Genei series of patent protected "Solar Eye" Concentrator Dishes are more effiecient, lighter, cost less and easier to construct compared to glass based dishes. Genei is a technology licensing company. Our patent protected interlocking, load bearing design with good, better and best mirror elements affirms our leaddership position after 30,000 worldwide patent searches. Because our patent protected interlocking and load bearing construction Genei solar eye concentrators are easily scalble to large utility applications.

Journals and federal labs[edit | edit source] Over a period of many months, NREL conducted a number of optical tests on the new, lightweight SkyTrough, a parabolic trough collector developed by SkyFuel. NREL engineers worked with SkyFuel engineers to identify areas of the reflector in need of attention. After a series of improvements, test results on NREL's Optical Efficiency Test Loop, combined with heat loss results from our receiver test lab showed that the new design has a high performance comparable to that of the best glass mirror modules. heat absorbing tubes

rotary heat engine[edit | edit source] Rankine cycle, Tokyo university

Hydrogen production[edit | edit source]

laser[edit | edit source]

2-5kW Stirling engine[edit | edit source]


Ques:A big challenge for this idea is the availability of a robust, cost effective, lightweight Stirling cycle engine in the 2-to-5kW range designed for use with solar heating. While there is a fair amount of information on the web about the cycle and history, these engines are specialized components and it's almost impossible to find commercially available examples. It seems as though you have to build one yourself if you want one. Designing and building a Stirling cycle engine for this application is no simple feat! For maximum efficiency you need to place the engine/generator combo at the prime focus of a parabolic reflector. This demands lightweight construction. Lightness and compactness require a high cycle efficiency, and this in turn requires a large temperature difference between the hot end and the cool end plus an effective regenerator to transfer heat between the compression and expansion processes. This has got to be difficult, otherwise why are they so hard to find?

Answ: Use parabolic troughs or fresnel lenses to heat up oil in a thermal battery. Pump the hot oil around the stirling engine, it thus won't need to be focused at the focul point of a parabolic lens.

PVC cells[edit | edit source] from A new type of potentially low-cost solar cell that is twice as efficient as traditional organic solar cells—and may even rival silicon flat-panel cells—has been patented by research professors in the Center for Nanotechnology and Molecular Materials at Wake Forest University (Winston-Salem, NC). FiberCell, a Winston-Salem spinoff of the nanotechnology center, has already licensed the technology for commercialization and has successfully fabricated lightweight and flexible solar-cell modules using inexpensive roll-to-roll and spray-on techniques.

Korea stirling engines[edit | edit source] sun tracking device with motors etc.

sun tracking with fresnel lenses , various designs

Solar heat exchangers and WORKING TURBINES

Energy Innovations[edit | edit source] Sunflower fresnel lenses

Patent 6959993 Adjust lenses individual Group lens adjustment

Open farm tech[edit | edit source]

moved to Openfarmtech

Black poly-pipe[edit | edit source] Black poly pipe on roof generates hot water.

heat pump[edit | edit source]

Reflectech[edit | edit source]

moved to Reflective_Material

Qalovis 38kw Stirling Engine[edit | edit source]

moved to QalovisStirling

Thermal battery powering Stirling engine[edit | edit source]

moved to Whispergen entry

Hydrogen production[edit | edit source]

Use sun energy to generate hydrogen for fuel cells.

yahoo groups[edit | edit source]

The realisation of that process can be found at the Fast Track page of the Communicable Insight website created by Dr. Allan J. Organ author of several seminal books about the Stirling engine. We are now discussing the construction of engines using this chart based design process. We are NOT discussing the process itself.

If your pursuit of an engine can be satisfied with a kinematic air/Nitrogen or Hydrogen charged engine which has the GPU-3 as the prototype, then you are in the right place.

There are numerous heat engine cycles of a similar nature to the Stirling process. Typically these are called “Hot Air Engines” of which a subset of those are classified as LTD Stirling engines (LTD = Low Temperature Differential). If this is your area of interest, you are invited to join the HotAirEngineSociety (HAES) list at YahooGroups as a place to start (

Rick metioned it, and I repeat it now. The APAIR.Bells layout can mimic the gas-phasing relations common in Alpha's but in a pure Beta engine.

This includes Delta P what is related to a high Delta T.  What most did not read in the document is that it can  easely be configured as any Beta type, ofcourse its a Beta.  The drive-train proposed on the Allan.O.J site is the one  mentioned in the APAIR.Bells document

(page 3 end of section 3.1). U.S. patent 4,546,663 Oct. 15, 1985; Drive linkage for Stirling cycle and other machines James G. Wood, Sunpower INC. It lacks the fine tuning of the lateral deviations at point T Zig, Rick and me came up with. At point S the motion is a simple arc

DIY stirling[edit | edit source]

moved to stirling steele

Question assumptions[edit | edit source] "....Q: Where can I get a 5 to 25 kW Stirling engine for my house, car, boat, etc. that will run on any fuel from cow chips to sunshine and be price competitive with a Honda generator of the same capacity?

While it would be very nice if such an engine existed at a price per kW that is competitive with gasoline or diesel engines, that probably isn't realistic at first. Gasoline and diesel generators are manufactured by the millions. When a 5 to 25 kW Stirling engine design first reaches the market it will initially be manufactured in much lower quantities and so undoubtedly will cost more per kW than competitive gasoline and diesel engines....."

Which is true but the author is assuming that you need to build one huge 5kw engine. You don't, multiple 500Watt engines AC wave outputs can be combined into a single AC wave with appropriate IGBT switching technology. For 10kw 22 engines would be needed with the construction costs much lower than it would have been for four 5kw engines.

Jim Dancy 1.5Kwatt system[edit | edit source]


Electric car Stirling combination[edit | edit source] Extended discussion, links to links, bellows instead of piston

Redrok[edit | edit source] List of patents Solar furnace Combine this idea with the curved parabolic mirrors with, glue and ribs from the other site I can't remember just now. The redrok design eliminates wind loading by spaces between the smaller mirrors. Actuators 75kg force steam turbine

Google sites pages[edit | edit source] paint

Infinia 3kw Stirling engine[edit | edit source]

moved to Stirling Infinia

Venture companies in green tech[edit | edit source]

8ft balloons focusing on PV cells[edit | edit source]

Our inflated, balloon-shaped concentrators are key to Cool Earth's innovative design. Each 8-foot-diameter concentrator is made of plastic film—the same kind of plastic film used to bag potato chips, pretzels, and so on—with a transparent upper hemisphere and a reflective lower hemisphere. When inflated with air, the concentrator naturally forms a shape that focuses or concentrates sunlight onto a PV cell placed at the focal point. This means we need fewer cells to produce a lot more electricity. In fact, a single cell in our concentrator generates about 300 to 400 times the electricity of a cell without a concentrator.

wiki type project[edit | edit source]

Openfarm links to many sites such as

Green power science[edit | edit source]

Non-patentable Stirling engines($285 - 40watt), which can easily be copied and reproduced with our own lathes and CNC machines. [url][/url] 40 to 500watt engine with parabolic and fresnel with youtube video. Multiple engines AC outputs are combined via IGBT , Mosfet etc. for a single large supply to power agriculture pumps, Fridges, air conditioners etc. Switching losses will be an issue, thus probably more viable for farms and small holdings, unless installed on flat roofs. Even 3.7kwatt can be built but at this size it gets expensive. Smaller 500Watt , each with its own heliostat, parabolic , Fresnel or Compound parabolic concentrator is used.

The whole issue is : build it yourself or create a community fund and buy the lathes etc. to crank out these machines. It can't be commercially reproduced at a reasonable cost. Thankfully there is nothing complicated about a generic Stirling engine.

Stirling Engine links[edit | edit source] Towers See SolarAcademicLinks Rhombic drive stirling more efficient than other designs

Dr. Senft's book "Ringbom Stirling Engines" Alpha engine prototype

ing Engine operation can be found at:[edit | edit source]

moved to

Quasiturbine[edit | edit source]

Moved to Engines2#Quasi_turbine

science online[edit | edit source]

Purchase: This video demonstrates how solar energy can be focused with a curved mirror. Once focused this energy can be used to cook food, sterilize water even create electricity. Includes an explanation of Energy, Power, Joules, Watts. Examples of radiant, heat, chemical and kinetic energy are given. Includes links to directions for constructing a simple solar concentrator.

CPC compact parabolic concentrator[edit | edit source]

Tailored edge-ray concentrators as ideal second stages for Fresnel reflectors. Tailer edged concentrator allows imperfect FresnelLens and mirror arrays.

Seebeck effect[edit | edit source]

moved to Seebeck effect

sandia lab[edit | edit source]

Mechanical engineers working on Stirling engines[edit | edit source]

links[edit | edit source]

The key to harnessing the sun’s power reliably can be found in Pyron Solar’s unique and proprietary 90kWp DC CPV generating system with dual axis solar tracking. It includes three, ideally spaced, 30 kWp DC arrays 15 m in diameter, all floating in water. The tracking system in azimuth is driven by small, low cost motors.

Kinetic storage[edit | edit source]

Gravity energy storage

other[edit | edit source] links to links

links[edit | edit source]

back to Energy Links and SolarAcademicLinks or backup

solar calculations[edit | edit source] , ,

New Links[edit | edit source] Tamera The first prototype of the Tamera fix-fokus mirror is now build and currently being tested.


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