The sky is always colder. See US Patent 4624113, and then dig into the math of radiative cooling (Berdahl-Martin, Smith, etc.) It might not give you 3kW/513m^-2, but you won’t need the 513m^-2 of solar panels and humongous thermal mass, and it will be much more available than solar.

Replace your refrigeration and air conditioning with the same tech, and you don’t need that much electricity. In Jersey, heating is a big power sink, but there must be a better solution than generating power at 30% efficiency and then taking another efficiency hit to produce heat, which was the original energy source.

If you’re running a machine shop, I don’t know what to tell you.

GEARTURBINE PROJECT
Atypical InFlow Thermodynamic
Technology Proposal Submission
Novel Fueled Motor Engine Atypical Type

*State of the art Innovative concept Top system Higher efficient percent.
Have similar system of the Aeolipile Heron Steam device from Alexandria 10-70 AD. -New Form-Function Motor-Engine Device. Next Step, Epic Design Change, Broken-Seal Revelation. -Desirable Power-Plant Innovation.

YouTube; * Atypical New • GEARTURBINE / Retrodynamic = DextroRPM VS LevoInFlow + Ying Yang Thrust Way Type – Non Waste Looses

-This innovative concept consists of hull and core where are held all 8 bteps of the work-flow which make the concept functional. The core has several gears and turbines which are responsible for these 8 steps (5 of them are dedicated to the turbo stages). The first step is fuel compression, followed by 2 cold turbo levels. The fourth step is where the fuel starts burning – combustion stage, which creates thrust for the next, 5th step – thrust step, which provides power to the planetary gears and turbines and moves the system. This step is followed by two hot turbo steps and the circle is enclosed by the final 8th step – bigger turbine. All this motion in a retrodynamic circumstance effect, wich is plus higher RPM speed by self motion. The Reaction at front of the action.

*8-X/Y Thermodynamic CYCLE – Way Steps:
1)1-Compression / bigger
2)2-Turbo 1 cold
3)2-Turbo 2 cold
4)2-Combustion – circular motion flames / opposites
5)2-Thrust – single turbo & planetary gears / ying yang
6)2-Turbo 2 hot
7)2-Turbo 1 hot
8)1-Turbine / bigger

-With Retrodynamic Dextrogiro vs Levogiro Phenomenon Effect. / Rotor-RPM VS InFlow / front to front; “Collision-Interaction Type” – inflow vs blades-gear-move. Technical unique dynamic innovative motion mode. [Retrodynamic Reaction = When the inflow have more velocity the rotor have more RPM Acceleration, with high (XY Position) Momentum] Which the internal flow (and rotor) duplicate its speed, when activated being in a rotor (and inflow) with [inverse] opposite Turns. The Reaction at front of the action. A very strong Novel torque power concept.

-Non waste parasitic looses for; friction, cooling, lubrication & combustion.

-Shape-Mass + Rotary-Motion = Inertia-Dynamic / Form-Function Wide [Flat] Cylindrical shape + positive dynamic rotary mass = continue Inertia positive tendency motion. Kinetic Rotating Mass.

-Combustion 2Two continue circular [Rockets] flames. [ying yang] opposite one to the other. – With 2TWO very long distance INFLOW [inside propulsion] CONDUITS. -4 TURBOS Rotary Total Thrust-Power Regeneration Power System. -Mechanical direct 2two [Small] Planetary Gears at polar position. -Like the Ying Yang Symbol/Concept. -Wide out the Rotor circumference were have much more lever [HIGH Torque] POWER THRUST. -No blade erosion by sand & very low heat target signature profile. -3 points of power thrust; 1-flow way, 2-gear, 3-turbine. *Patent; Dic. 1991 IMPI Mexico #197187 All Rights Reserved. Carlos Barrera.

http://www.dynatronic.eu/en/products.php

If this works, no Stirling will be needed anymore …..

Best Regards from Germany

C. Wiesner
ROTOKINETIK

Why?

I have been designing a system from the perspective of the western world. What if I change the thought process and combine clean water – cooking, heat, and electricity in one unit at really low cost.

By combining Compound Parabolic Collectors, a drum to store the heat, and an LTD Stirling built into the drum, it is possible to do heat electricity and cooking in one unit for a small house.

From what you have said you need a really inexpensive power source. Give me a price range, a power output, and voltage-cycle range, I will see If I can hit the target on all three.

The system I thought was finished, and still seem to be redesigning, was meant to compete with western energy prices. It seems to need a little brother.

David Fuchs

But, but, (insert random negativity here)

But, but, with a 16 inch diameter piston and a 2/3 mm – .667 mm gap (0.0262598 inch) and a circumference of 50.265 inches, an area of 201.062 in2, that would be like having a 1.318 in2 inch hole in the piston.

A 1.32 in2 hole is different than a narrow gap of the same area due to boundary layer effects (resistance) that occurs in narrow channels. Plus add in the fact that you are pumping a hundred plus cubit feet of air into and out of the piston(s) every minute and the leakage around the piston is minimal. Also, that 2/3 mm gap is the high side of the possible wear.

Now I fully expect the next person to quote … “hundred plus cubit feet of air” … and I look forward to it.

May in soon I will post that scheme on this forum so that you can give us yous valuable suggestion.

Note: My company where I work at the moment totally runs on Solar power.

Basically, the cost comes down to land and taxes, raw materials, minimal human labor, and shipping costs.

“only assume existing panel prices”. Ahhhh, no I will not assume that. Solar thermal panels price have not seen the sort of downward price pressure that photovoltaic panels have. It is time to change that.

The second part is another question containing the assumption “(and current panel prices)”. So grab a calculator, and the rest is left as an exercise for the reader.

These are not small engines. For 3 kWh you are talking 6 x 3 x 3 foot (2 x 1 x 1 meter). Using it on a small boat would be fun to do, but I do not think it would be practical from a floor space required perspective. It would be an interesting design challenge. Use an oversize rudder that doubles as your heat sink, use a small continuous feed (no tank) gas powered hot water heater as the heat source.

Powering Industrial motors, ag processing of grain, etc is all workable though.

A couple years back I built an x – y magnetically locked slide (free to move in the z). It was able to support about 200 lbs with a little less than a mm of give in the y. Now take a 5 to 10 pound, 12- 16 inch diameter piston, mount and center it in the cylinder using one of these slides, and once the initial wear (1/8 to 2/3 mm) occurs, that is it, no more wear. Well, as long as the curie temp on the magnets isn’t reached that is. So as long as the magnets last the piston doesn’t have to be replaced.

Ann this is for the next commenter … who I know will happen soon.

Now I have been told I need to explain things better, and since I know the very next comment is going to be ….

But, but, (insert random negativity here)

But, but, with a 16 inch diameter piston and a 2/3 mm – .667 mm gap (0.0262598 inch) and a circumference of 50.265 inches, an area of 201.062 in2, that would be like having a 1.318 in2 inch hole in the piston.

A 1.32 in2 hole is different than a narrow gap of the same area due to boundary layer effects (resistance) that occurs in narrow channels. Plus add in the fact that you are pumping a hundred plus cubit feet of air into and out of the piston(s) every minute and the leakage around the piston is minimal. Plus that 2/3 mm gap is the high side of the possible wear.

Now I fully expect the next person to quote … “hundred plus cubit feet of air” … and I look forward to it.

David

More expensive silicon steel may be desirable for some of the magnetic bearing components or UHMWPE for some of the critical wear components could provide reasonable performance but require periodic field replacement.

cheap mass produced Stirlings are a holy grail to transform the small engine/energy world – small boat engines, industrial motors, ag processing of grain, etc

The problem with that is the max efficiency in a heat engine is 1 – tc/th, so lower temperatures are not an option. Due to losses and inefficiencies, you need to gather more energy at lower temperature differentials, which means more panels and higher cost.

As mentioned in a post below, good commercialization would be key to large scale implementation. Rooftop solar PV soft Costs represent 2/3 of total LCOE, and if we assume the same for your system (and current panel prices) will it still be price competetive?

All kidding aside, the final design is being reworked for an 11th time. I am working the storage temperature (reads efficiencies) up and the size down to reduce cost even further.

The target is the thermal mass at 150 C +-10 C. So water is no longer an option as it would boil. While it would be fun to watch this thing reach 150 C full of soda cans, sand or dirt is the better option now.

You did give me a really good idea. At 150 C the thermal storage unit can be outfitted for cooking. That would alleviate a ton of issues in the world, heat to sterilize water, fuel for cooking, etc. The great thing is it would all be waste heat from leakage.

The criteria are massive overkill. Criteria of 5 days energy storage without sunlight, 2-3 times the energy needed on the worst day of the year, worst solar thermal panels in existence, running at a low temp differential, etc.

If you are planning on surviving a nuclear winter, some random god blotting out the sun for a week, or a zombie apocalypse build the above system. It is total overkill.

David