Tuesday, October 18, 2016

Thermal Storage of Solar Energy

News comes from Madrid Spain of a method that utilizes silicon to store solar energy as heat.  Heated silicon gives off thermal radiation to TPV converters, with no moving parts, that convert one hundred times more output per cell than typical solar cells, allowing for much more dense storage compared to  currently-used phase-change salt, and other thermal methods.

Detail here:   http://newatlas.com/cheap-solar-energy-molten-silicon/45833/

Here is the abstract of the original paper, published in ScienceDirect, by the research team:

http://www.sciencedirect.com/science/article/pii/S0360544216304546

The Madrid team formed a company, SILSTORE, to commercialize the process.

Thermal Storage of Solar Energy

News comes from Madrid Spain of a method that utilizes silicon to store solar energy as heat.  Heated silicon gives off thermal radiation to converters, with no moving parts, that convert one hundred times more output per cell than typical solar cells, allowing for much more dense storage compared to phase-change salt, and other methods.

Detail here:   http://newatlas.com/cheap-solar-energy-molten-silicon/45833/

Here is the abstract of the original paper, published in ScienceDirect, by the research team:

http://www.sciencedirect.com/science/article/pii/S0360544216304546

Friday, September 30, 2016

ARPA-E Has Extended Submissions into 2017

ARPA-E has extended the deadline for concept papers for energy-related projects, to the date of September 2017.  This allows me plenty of time to work on my monorail project, as well as gather input from selected universities, for calculations to determine the optimum size of my energy storage device.
The State of California is forging ahead with legislation to enhance power storage, especially for so-called "renewable energy" (I prefer "non-fueled energy generation").

Sunday, August 14, 2016

ARPA-E Funding Proposal Under Development: "Concept Paper" (DE-FOA-0001428)

I will be submitting a proposal to receive funding to test this form of energy storage to ARPA-E, under ARPA-E's "IDEAS" FOA (DE-FOA-0001428).  For the proposed experimental/prototype build, the parameters will target providing maximum power to a single large household for eight hours (e.g., 56KwH), with the scalable deployment of 100 households per one kilometer of my Ultra-Linear Hydraulic Accumulator (ULHA).

I already have a FOA control number from ARPA, and am working on the four page (max) "Concept Paper".  I will submit it end of August at the latest (deadline is September 28 2016).

I hope ARPA-E will fund the materials for a 1/100th version of my ULHA system.  The beauty of the ULHA system is that, unlike battery builds, there is relatively little in the way of new production activity that has to be invented.  The only constraint is the availability of the hydraulic motors from Artemis, and the availability of 1MW 440v generators.  Of course, with my test version, I only need a 7kw generator, and small Artemis motor.   Pictures of "The Build" will also help anyone following this idea to better understand how it works, as well as realize the actual $/kwh storage costs.

Still working on the USPTO filing for the "ULHA".  I am sorry if you wish to follow the advanced version of this idea, but since the USPTO is now "first to file" rather than "first to invent" I do not wish to be overtaken by some other entity which does not really believe in "open source" availability of ideas.

Thursday, July 14, 2016

Advancement of Technique for the Ultra-Linear Hydraulic Accumulator Energy Storage System.

People who have examined my "Ultra-Linear Hydraulic Accumulator" (ULHA) design and methodology often have asked if I have applied to the USPTO (patent office) for IP protection.  I had not, up to now, because I felt a sense of economic shortfall because of one element to this "flat ground hydro" that is a concern,  the cost of hydraulic oil.  I did not want to make a provisional patent filing for an unusable idea.

In my initial workup of this invention, I proposed the use of hydraulic oil in volume.  If you extend the ULHA for miles, you cannot help but utilize millions of gallons of oil, and regardless of price, it becomes a factor resulting in a less-economic energy storage device.  Hydraulic oil is superior in efficiency in converting a pressurized flow of liquid into rotational power and the generation of electricity, so the substitution of the most economic of all fluids, water, raises its own issues.

After much musing, I have worked out an economical modification that substitutes water, salty or fresh, for the bulk of storage volume. Yet for the conversion of pressurized fluid into rotational power, I have retained the use of hydraulic fluid and the efficiency of the motors such as Artemis Intelligent Power Digital Displacement® Technology
http://www.artemisip.com/applications/

As soon as I file my Provisional Patent Application, I will be posting the details of my work.




Wednesday, May 25, 2016

As many of you attending Maker Faire might recall, I mentioned the "March 27" date, where the ISO (Independent System Operator) asked solar facilities to "turn off".

Reproduced here, is an excerpt from that April 11, 2016 NPR article Stephanie Joyce and Lauren Sommer:
==================================================================

Solar energy records are falling left and right in California these days, as the state steams ahead
toward its ambitious renewable energy goals.  But the success of solar has brought about a hidden downside: on some perfectly sunny days, solar farms are being told to turn off.  That’s because in the spring and fall, when Californians aren’t using much air conditioning and demand for electricity is low, the surge of midday solar power is more than the state can use.  It’s becoming a growing concern for those running the grid at the California Independent System Operator. At their Folsom headquarters, a team continually manages the power supply for most of the state, keeping the lights on for some 30 million people.  “It’s constantly solving a constant problem, meaning you’re always trying to balance,” says Nancy Traweek, who directs system operations for the grid.

Ups and Downs of Renewables
On March 27, a sunny day, some solar farms had to shut down because there was more power on
the grid than Californians were using. In the past, balancing California’s electric was fairly straightforward. The power supply was constant, coming from natural gas and nuclear power plants that put out a steady stream of electricity.

But the growth of solar and wind power has thrown a wild card in the mix. The sun and wind are
much less predictable.  “All of a sudden you have a major cloud that comes over a solar field,” Traweek says, and that causes the solar power to drop off.

“That [power] needs to come from somewhere else immediately,” she says.

So grid operators have to keep the natural gas plants running in the background. If they’re turned
off, many take four to eight hours start up again.California’s highest demand for electricity also happens right as the sun goes down, when Californians come home from work and lights turn on. Grid operators need natural gas power plants at the ready to meet that peak and to fill the gap that’s left by solar power.

But add up all those energy sources – solar, wind, natural gas, as well as hydropower, nuclear and
others – and on some days, they’re making more electricity than California needs

“When it gets really bad, now we really got to start cutting as much as we possibly can,” Traweek
says. “If that’s not done, then you could have a blackout.”

So, grid operators have to tell solar farms to shut off.

“That’s zero-carbon, clean energy,” says Keith Casey, a vice president at the California Independent
System Operator. “It would just be a travesty to curtail large amounts of it.”

Casey says the problem will only get worse as more solar and wind connect to the grid. California
plans to hit 50 percent renewable energy by 2030.

Joining Grids Across the West
California’s grid operator is developing a solution, one that is garnering controversy across state
lines.  Right now, California’s grid runs mostly on its own, like an island. But there are power lines reaching across the West.

“You’re operating your little piece of the system,” Casey says, “but if you can operate it as an
integrated whole, you can just operate the system more efficiently.”

So, Casey is proposing California join up with its neighbors. Instead of having lots of electric grids
across the West, each doing their own thing, there would be a larger regional grid, sharing power
across state lines.

When California has too much solar power, neighboring states would buy it, preventing California
from having to switch off the solar farms.

“It’s a win-win,” Casey says. “We really think we need to seize the most efficient opportunities that
are out there for integrating renewables.”

Monday, May 23, 2016

I want to post the graphic that I showed at Maker Faire, that explains my working concept.
On the right-hand part of the picture, the image shows a full reservoir below the two blue parallel containment walls (heheh...sounds 'nuclear'!)  with the leaf spring stack (yellow) arranged in a circular form.  These springs are sheets of fiberglass.  I am thinking, that perhaps steel (being so cheap with a worldwide glut) might be a significant add-in as a leaf spring.

As the hydraulic fluid (red) is pumped into the bladder (not visible, too thin for this drawing) by a hydraulic pump (powered by electricity from renewable sources) the bladder assumes the least possible geometric shape, which is a circle, and pushes the containment walls into a circle.  Because the containment walls are attached at their uppermost end to the leaf spring stack, the deformation of the containment walls into a circle draws down the leaf spring stack into a flat oval (left image).  Energy is stored in the deformed spring stack, rather than by any elastomeric substance (e.g. rubber) or compressing a gas (which is typically the case in most hydraulic accumulators).

To release energy stored in the spring stack deformation, hydraulic fluid is released from the bladder, and is directed through a hydraulic motor/440v AC generator combination, and back into the no-pressure reservoir.