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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

V-shaped solar cells could lead to better efficiency
Peumans goes on to explain that most organic solar cells are made on planar substrates. “When the light hits it, there is only one bounce – only once chance for the light to be absorbed.” The v-shape, he continues, creates an environment in which the light can bounce around. “Every time the light bounces, it has a chance to be absorbed into the cell.”

Organic solar cells are defined mainly by a “thin film of organic material sandwiched between two electrodes,” Peumans explains. This is what makes them low cost and flexible. For the most part, due to their low efficiency, they are not realistically considered for energy generation on a large scale. However, the technique developed at Stanford has the potential to change that. “We were able to increase the efficiency by 52 percent,” he says. “The same cell generates more electrical power.”

Organic solar cells are not the only technology that could make use of this efficiency-boosting technique. “While this works particularly well on organics,” Peumans says, “it can be applied to other thin film solar cell technologies as well.” He explains that they evaluated the potential for increased efficiencies in thin film silicon solar cells. “For many solar cell technologies, it would make sense to adopt this approach.”
http://www.physorg.com/news117290444.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Researchers Investigate Supercritical Method of Converting Chicken Fat and Tall Oil into Biodiesel
Chemical engineering researchers at the University of Arkansas have investigated supercritical methanol as a method of converting chicken fat into biodiesel fuel. The new study also successfully converted tall oil fatty acid, a major by-product of the wood-pulping process, into biodiesel at a yield of greater than 90 percent, significantly advancing efforts to develop commercially viable fuel out of plentiful, accessible and low-cost feedstocks and other agricultural by-products.
http://www.physorg.com/news117294505.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

The Solar Nozzle
The author proposes a new method for conversion of solar energy into electricity using natural convection in an open cycle. A convergent nozzle made of glass or other transparent material is arranged vertically with a modest gap between the open base and ground level. A solar absorber abundantly perforated and several layers thick or of metallic honeycomb structure is arranged in the lower levels but above the base of the nozzle. The elaborate solar absorber structure is required to provide rapid heat transfer. Solar energy absorbed warms air in its neighbourhood which rises because of its buoyancy drawing in ambient air to replace. As the air flows through the nozzle it accelerates because of the narrowing/constriction. Heat energy acquired from the absorber is converted into the kinetic energy of flow. A wind turbine placed in the throat of the nozzle converts flow kinetic energy into electricity. A critical height is calculated for given nozzle dimensions where all of the solar energy absorbed is converted into kinetic energy. This could allow the conversion of solar energy into electricity with high efficiency. A prototype solar nozzle is proposed of base diameter 10 metres, throat diameter 1 metre, and height 10 metres. Calculation indicates that at maximum UK summer insolation this could give an electricity output of up to 59 kilowatts. Solar farms could be built of such modular units. Larger prototypes with capacity up to 5 Megawatts are described. An alternative configuration using incoming air into a nozzle pre solar absorber is also described which would be more compact and have higher power density. In all cases the systems proposed are driven simply by the buoyancy of warm air. All the proposals are theoretical and the author asks others to build, test, evaluate and develop the ideas.
http://www.globalwarmingsolutions.co.uk/the_solar_nozz...
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Oceanflow Energy
Evopod is a semi-submerged, floating, tethered tidal energy capture device. It uses a simple but effective mooring system that allows the free floating device to maintain optimum heading into the tidal stream.
http://www.oceanflowenergy.com/
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Michał P.

Michał P. petrochemia

Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Sun table
"A product that pushes people to spend more time outdoors will be beneficial for humanity. Let's get rooted in nature again, even if it's in a 21st century kind of way." Devang A. Shah

http://suntable.net/Michał P. edytował(a) ten post dnia 28.12.07 o godzinie 11:41
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

C-Wave
Delivery of Low Cost Wave Energy

C-Wave Limited is a renewable power company and the developer of an innovative wave energy technology. C-Wave offshore power systems can provide genuinely green electricity at a cost that is competitive with traditional generating technologies and established renewable energy providers such as wind power.

C-Wave's offshore power systems efficiently extract energy from normal waves and dissipate the forces of storm waves. The result is compact, cost effective and emission-free energy generation which will survive the worst battering of ocean waves.
http://www.cwavepower.com/index.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Fresnel technology
Fresnel technology, which has now been tested under real conditions, is easy to manufacture, build and operate. The mirrors that capture and focus the sun's rays are flat. Set up in a straight line, they form long, flexible mirror arrays. Arranged in parallel, they reflect the sun's energy rays onto a pipe positioned 8 meters above the mirrors. This absorber pipe contains water, which is heated to temperatures of up to 450 degrees Celsius. This produces steam, which is converted into electrical energy over a steam turbine, much the same as in a conventional power plant. Fresnel collectors are advanced in many respects: they are immune to the wind, and have a much smaller footprint than previous solar collectors. On the south coast of Spain, Almería offers the best conditions for demonstrating this technology - there are 3 000 hours of sunshine per year.
http://www.manferrostaal.com/fresnel_technik.php?id=835
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Johnson ElectroMechanical Systems

Johnson Thermoelectric Energy Conversion System.
The JTEC is an all solid-state engine that operates on the Ericsson cycle. Equivalent to Carnot, the Ericsson cycle offers the maximum theoretical efficiency available from an engine operating between two temperatures. The JTEC system utilizes the electro-chemical potential of hydrogen pressure applied across a proton conductive membrane (PCM). The membrane and a pair of electrodes form a Membrane Electrode Assembly (MEA) similar to those used in fuel cells. On the high-pressure side of the MEA, hydrogen gas is oxidized resulting in the creation of protons and electrons. The pressure differential forces protons through the membrane causing the electrodes to conduct electrons through an external load. On the low-pressure side, the protons are reduced with the electrons to reform hydrogen gas. This process can also operate in reverse. If current is passed through the MEA a low-pressure gas can be "pumped" to a higher pressure.

Johnson Ambient Energy System.
There are two ambient energy power scavengeing configurations. The first one, the Johnson Ambient Heat Engine (JAHE), is optimized for generating power from the daily ambient temperature fluctuations. Although it offers Carnot cycle operation, it uses a thermal mass as a stabilizing heat sink/source to create the required temperature difference. The second configuration, the Johnson Ambient Environment Engine (JAEE) is open to the environment and operates in a manner similar to a fuel cell. It is optimized for power generation from daily temperature, barometric pressure and humidity changes.

Johnson Electric Heat Pipe.
(JEHP) combines the thermal conversion capability of a heat engine and the heat transport capabilities of a heat pipe into a single versatile device. The device employs a binary working fluid, which is comprised of hydrogen in combination with a two-phase fluid.
http://www.johnsonems.com/jhtec.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Czesław M.

FuturEnergy 1KW Upwind Turbine

Using our unique Permanent Magnet Generators, combined with our Hi-Spec Wind Turbine Blade Sets, these furling turbines create very useful power in low wind conditions, and over 1000W in winds of 12.5m/s.

Available in 12V, 24V, 36V & 48V DC versions, they are suitable for battery charging, water/air heating and Grid-Tie installations.

Technical Specifications
Nominal Power Output - 1000W (600W / 12v Version)
Start-Up Wind Speed - 2.5m/s
Cut-In Wind Speed - 3.2m/s
Rated Wind Speed - 12.5m/s
Survival Wind Speed - 50m/s
Rotor Diameter - 1.8m
Number of Blades - 5
Generator Type - 3-Phase Perm Magnet (this is rectified to DC inside the turbine, giving a 2-wire DC output)
Weight - 22Kgs
Suitable Tower Diameter - 50mm
Noise: LAeq 35dB @ 5m/s @ 5m behind rotor
Noise: LAeq 54dB @ 7m/s @ 5m behind rotor
ROHS compliant
http://futurenergy.co.uk/products.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Czesław M.

Ogniwo Chlorofilowe

Jeszcze tansze wytwarzanie elektrycznosci ze swiatla... za pomoca syntetycznego barwnika. Takie ogniwo chlorofilowe..;-)

Taking nature’s cue for cheaper solar power

Solar cell technology developed by the University’s Nanomaterials Research Centre will enable New Zealanders to generate electricity from sunlight at a 10th of the cost of current silicon-based photo-electric solar cells.
Dr Wayne Campbell and researchers in the centre have developed a range of coloured dyes for use in dye-sensitised solar cells.

The synthetic dyes are made from simple organic compounds closely related to those found in nature. The green dye Dr Campbell (pictured) is synthetic chlorophyll derived from the light-harvesting pigment plants use for photosynthesis.

To jest piekne, kolorowe szyby jako ogniwa:
The dyes can also be incorporated into tinted windows that trap to generate electricity.

http://physorg.com/news94916884.html
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Better Bugs for Making Butanol
Engineered E. coli proves efficient at churning out the biofuel.
In a push to find better biofuels to reduce gasoline consumption and lower greenhouse-gas emissions, scientists have genetically engineered E. coli that is highly efficient in producing butanol, a promising new type of biofuel. The new technology could speed up the development of butanol biofuels into a cost-effective alternative to ethanol.

While ethanol is the main biofuel on the market today, energy firms are increasingly looking to alternatives such as butanol. "It has many attractive properties," says Jim McMillan, manager of biorefining process R&D at the National Renewable Energy Laboratory's National Bioenergy Center, in Golden, CO. Because butanol packs more energy per gallon than ethanol does, cars running on butanol get better mileage. And, unlike ethanol, it doesn't mix with water, so it can be shipped in existing petroleum pipelines without causing problems.

A number of research groups are engineering microbes that can convert sugar from various feedstocks into butanol. Most of these groups rely on the bacterium Clostridium acetobutylicum, which naturally makes a form of butanol called 1-butanol. "But Clostridium is not easy to deal with," says James Liao, a chemical engineer at the University of California, Los Angeles. "It grows slowly, it's very fastidious, and it's not easy to genetically manipulate." Despite decades of tinkering by scientists, the microbe still can't produce enough butanol to make it economically viable as a transportation fuel, Liao says.

Instead, he and his colleagues turned to E. coli. Although the bacterium does not produce butanol naturally, it is easy to modify and grows fast. Instead of tweaking the pathway that the microbes employ for fermenting sugar into alcohol, Liao reasoned that he could program E. coli to produce butanol by diverting some of the microorganism's metabolites into alcohol production. These metabolites, called keto acids, are involved in the synthesis of amino acids, the building blocks of proteins.
http://www.technologyreview.com/Energy/20073/
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Cheap Hydrogen
A new process uses sunlight and a nanostructured catalyst to inexpensively and efficiently generate hydrogen for fuel.

Nanoptek, a startup based in Maynard, MA, has developed a new way to make hydrogen from water using solar energy. The company says that its process is cheap enough to compete with the cheapest approaches used now, which strip hydrogen from natural gas, and it has the further advantage of releasing no carbon dioxide.

Nanoptek, which has been developing the new technology in part with grants from NASA and the Department of Energy (DOE), recently completed its first venture-capital round, raising $4.7 million that it will use to install its first pilot plant. The technology uses titania, a cheap and abundant material, to capture energy from sunlight. The absorbed energy releases electrons, which split water to make hydrogen. Other researchers have used titania to split water in the past, but Nanoptek researchers found a way to modify titania to absorb more sunlight, which makes the process much cheaper and more efficient, says John Guerra, the company's founder and CEO.

Researchers have known since the 1970s that titania can catalyze reactions that split water. But while titania is a good material because it's cheap and doesn't degrade in water, it only absorbs ultraviolet light, which represents a small fraction of the energy in sunlight. Other researchers have tried to increase the amount of sunlight absorbed by pairing titania with dyes or dopants, but dyes aren't nearly as durable as titania, and dopants haven't produced efficient systems, says John Turner, who develops hydrogen generation technologies at the National Renewable Energy Laboratory (NREL), in Golden, CO.

http://www.technologyreview.com/Energy/20134/?nlid=853
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Synthetic fuel concept to steal CO2 from air

Green Freedom™ for carbon-neutral, sulfur-free fuel and chemical production

The Laboratory has developed a low-risk, transformational concept, called Green Freedom™, for large-scale production of carbon-neutral, sulfur-free fuels and organic chemicals from air and water.

Currently, the principal market for the Green Freedom production concept is fuel for vehicles and aircraft.

At the heart of the technology is a new process for extracting carbon dioxide from the atmosphere and making it available for fuel production using a new form of electrochemical separation. By integrating this electrochemical process with existing technology, researchers have developed a new, practical approach to producing fuels and organic chemicals that permits continued use of existing industrial and transportation infrastructure. Fuel production is driven by carbon-neutral power.
http://www.lanl.gov/news/index.php/fuseaction/nb.story...

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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Soliant Energy Next Generation Solar Panel

Soliant Energy is an award-winning manufacturer of innovative concentrating solar panels. Our rooftop solar concentrator offers an efficient and cost-effective solution for solar electric systems.

Next Generation Solar Panel

Same dimensions and weight as a conventional solar panel
Identical installation
Optimized for the rooftop
Fully integrated tracking within the panel
Simple, reliable
Low maintenance
http://www.soliant-energy.com/index.php
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Holographic Solar

The main limitation of solar power right now is cost, because the crystalline silicon used to make most solar photovoltaic (PV) cells is very expensive. One approach to overcoming this cost factor is to concentrate light from the sun using mirrors or lenses, thereby reducing the total area of silicon needed to produce a given amount of electricity. But traditional light concentrators are bulky and unattractive -- less than ideal for use on suburban rooftops.

Now Prism Solar Technologies of Stone Ridge, NY, has developed a proof-of-concept solar module that uses holograms to concentrate light, possibly cutting the cost of solar modules by as much as 75 percent, making them competitive with electricity generated from fossil fuels.

The new technology replaces unsightly concentrators with sleek flat panels laminated with holograms. The panels, says Rick Lewandowski, the company's president and CEO, are a "more elegant solution" to traditional concentrators, and can be installed on rooftops -- or even incorporated into windows and glass doors.

The system needs 25 to 85 percent less silicon than a crystalline silicon panel of comparable wattage, Lewandowski says, because the photovoltaic material need not cover the entire surface of a solar panel. Instead, the PV material is arranged in several rows. A layer of holograms -- laser-created patterns that diffract light -- directs light into a layer of glass where it continues to reflect off the inside surface of the glass until it finds its way to one of the strips of PV silicon. Reducing the PV material needed could bring down costs from about $4 per watt to $1.50 for crystalline silicon panels, he says.
http://www.technologyreview.com/read_article.aspx?ch=s...
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

New Technology Could Lead to More Energy-Efficient Ethanol Production

The technology will help to address the serious concern regarding the energy efficiency of bioethanol production, according to Robert L. Fireovid, ARS national program leader for process engineering and chemistry, Beltsville, Md.

The researchers' invention, called a spiral-wound liquid membrane module, could potentially replace the widely used process of distilling ethanol from fermentation broths. The module offers ethanol producers the important advantage of combining two separation processes, extraction and membrane permeation, in one piece of equipment.

With further research and development, the module would require less energy than distillation. Today, energy costs are ethanol producers' second largest expense; feedstocks are first.
http://www.ars.usda.gov/is/pr/2007/070626.htm
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Xcel Energy launches groundbreaking wind-to-battery project

Xcel Energy has signed a contract to purchase a battery from NGK Insulators Ltd. that will be an integral part of a project. The sodium-sulfur battery is commercially available and versions of this technology are already being used in Japan and in a few US applications, but this is the first U.S. application of the battery as a direct wind energy storage device.

The 20 50-kilowatt battery modules will be roughly the size of two semi trailers and weigh approximately 80 tons. They will be able to store about 7.2 megawatt-hours of electricity, with a charge/discharge capacity of one megawatt. When the wind blows, the batteries are charged. When the wind calms down, the batteries supplement the power flow.
http://www.xcelenergy.com/XLWEB/CDA/0,3080,1-1-1_15531...
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

wave energy

http://www.goodwin.co.uk/gsc/applications_renewable.asp

proponuję kliknąc na trzeci slajd, jest tam opis
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Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

Ciekawe technologie:

SolarPrism™ based Technologies:
1. SolarPrism™
2. SPConcentrator (SPC) Unit
3. SPHotWater (SPHW) Unit
4. SPDesalinator (SPD) Unit
5. SPE-Brine Electrolyzer (SPE-Brine) Unit
6. PortalGen™ Unit

Dynamic Generation Machineries:
7. Dynamic Speed Reducer (DSR)
8. Dynamic Power Shifter (DPS)
9. Dynamic Electric Generator (DEG)

BioRaw Cropping and Renewable H2 FuelRods:
10. BioRaw Feedstocks for RH2 and Bio diesel
11. RH2 Engines and Renewable FuelRods

Vortexodial™ Wave Turbine:
12. Turbo Generator Module

Vortexodial™ Wind Turbine:
13. Turbo Generator Module

http://www.portalgen.com/
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Ireneusz Sharifi

Ireneusz Sharifi Project
Manager/Operations
Manager

Temat: CIEKAWOSTKI, NOWINKI TECHNOLOGICZNE

witam,
miałem okazję rozmawiać z tą firmą o takich rozwiązaniach jak n/w
http://ferox.pl/silniki/paliwa/gazy_odn_biogaz_pl.htm

czyli jak zarobić na śmieciach...nie brudząc rąk:) a może zaproponować takie rozwiązanie problemu masy śmieci w Neapolu??
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