W&T Wetenschap & Technologie
Een plek om te discussiëren over wetenschappelijke onderwerpen, wetenschappelijke problemen, technologische projecten en grootse uitvindingen.
Bij de meeste zonnepanelen krijg je een 20 tot 25 jaar garantie dat hij na die periode nog minstens 80% van het vermogen kan leveren ten tijde het paneel geproduceerd is (onder bepaalde voorwaarden natuurlijk). Voorbeeldjequote:Op maandag 7 maart 2011 18:17 schreef Pietverdriet het volgende:
[..]
Wat heb ik aan een theoretische terugverdientijd en levensduur als ik maar 2 jaar garantie krijg?
Hoeveel andere producten gebruik jij langer dan twee jaar die een dergelijke harde garantie bieden?
Ik wordt blij van dit onderwerp. persoonlijk denk ik dat het nog iets langer gaat duren dan de 5-10 jaar die de meest optimistische stemmen hier uitspreken. Maar goed nieuws is het zeker.
Weg met de riooljournalistiek. Klik er niet op. Ze vergiftigen de maatschappij.
New solar product captures up to 95 percent of light energy
Efficiency is a problem with today's solar panels; they only collect about 20 percent of available light. Now, a University of Missouri engineer has developed a flexible solar sheet that captures more than 90 percent of available light, and he plans to make prototypes available to consumers within the next five years.
Patrick Pinhero, an associate professor in the MU Chemical Engineering Department, says energy generated using traditional photovoltaic (PV) methods of solar collection is inefficient and neglects much of the available solar electromagnetic (sunlight) spectrum. The device his team has developed – essentially a thin, moldable sheet of small antennas called nantenna – can harvest the heat from industrial processes and convert it into usable electricity. Their ambition is to extend this concept to a direct solar facing nantenna device capable of collecting solar irradiation in the near infrared and optical regions of the solar spectrum.
Working with his former team at the Idaho National Laboratory and Garrett Moddel, an electrical engineering professor at the University of Colorado, Pinhero and his team have now developed a way to extract electricity from the collected heat and sunlight using special high-speed electrical circuitry. This team also partners with Dennis Slafer of MicroContinuum, Inc., of Cambridge, Mass., to immediately port laboratory bench-scale technologies into manufacturable devices that can be inexpensively mass-produced.
"Our overall goal is to collect and utilize as much solar energy as is theoretically possible and bring it to the commercial market in an inexpensive package that is accessible to everyone," Pinhero said. "If successful, this product will put us orders of magnitudes ahead of the current solar energy technologies we have available to us today."
As part of a rollout plan, the team is securing funding from the U.S. Department of Energy and private investors. The second phase features an energy-harvesting device for existing industrial infrastructure, including heat-process factories and solar farms.
Within five years, the research team believes they will have a product that complements conventional PV solar panels. Because it's a flexible film, Pinhero believes it could be incorporated into roof shingle products, or be custom-made to power vehicles.
Once the funding is secure, Pinhero envisions several commercial product spin-offs, including infrared (IR) detection. These include improved contraband-identifying products for airports and the military, optical computing, and infrared line-of-sight telecommunications.
http://www.zeitnews.org/e(...)of-light-energy.html
Efficiency is a problem with today's solar panels; they only collect about 20 percent of available light. Now, a University of Missouri engineer has developed a flexible solar sheet that captures more than 90 percent of available light, and he plans to make prototypes available to consumers within the next five years.
Patrick Pinhero, an associate professor in the MU Chemical Engineering Department, says energy generated using traditional photovoltaic (PV) methods of solar collection is inefficient and neglects much of the available solar electromagnetic (sunlight) spectrum. The device his team has developed – essentially a thin, moldable sheet of small antennas called nantenna – can harvest the heat from industrial processes and convert it into usable electricity. Their ambition is to extend this concept to a direct solar facing nantenna device capable of collecting solar irradiation in the near infrared and optical regions of the solar spectrum.
Working with his former team at the Idaho National Laboratory and Garrett Moddel, an electrical engineering professor at the University of Colorado, Pinhero and his team have now developed a way to extract electricity from the collected heat and sunlight using special high-speed electrical circuitry. This team also partners with Dennis Slafer of MicroContinuum, Inc., of Cambridge, Mass., to immediately port laboratory bench-scale technologies into manufacturable devices that can be inexpensively mass-produced.
"Our overall goal is to collect and utilize as much solar energy as is theoretically possible and bring it to the commercial market in an inexpensive package that is accessible to everyone," Pinhero said. "If successful, this product will put us orders of magnitudes ahead of the current solar energy technologies we have available to us today."
As part of a rollout plan, the team is securing funding from the U.S. Department of Energy and private investors. The second phase features an energy-harvesting device for existing industrial infrastructure, including heat-process factories and solar farms.
Within five years, the research team believes they will have a product that complements conventional PV solar panels. Because it's a flexible film, Pinhero believes it could be incorporated into roof shingle products, or be custom-made to power vehicles.
Once the funding is secure, Pinhero envisions several commercial product spin-offs, including infrared (IR) detection. These include improved contraband-identifying products for airports and the military, optical computing, and infrared line-of-sight telecommunications.
http://www.zeitnews.org/e(...)of-light-energy.html
"An educated citizenry is a vital requisite for our survival as a free people."
waarschijnlijk omdat grote olie maatschappen die dingen voor veel geld opkopen om zo hun winst aan olie niet te laten zakken en dan de tech pas te gaan exploiteren als het omslag punt is bereikt...quote:Op woensdag 18 mei 2011 07:47 schreef Sealnova het volgende:
Weer zo'n uitvinding waar je nooit meer iets van hoort
Dit, zelfde geval met smeerolie die je niet hoeft te vervangen.quote:Op woensdag 18 mei 2011 08:06 schreef tntkiller het volgende:
[..]
waarschijnlijk omdat grote olie maatschappen die dingen voor veel geld opkopen om zo hun winst aan olie niet te laten zakken en dan de tech pas te gaan exploiteren als het omslag punt is bereikt...
| Wordfeud: marcel-o |plug.dj/uptempo |<-- draai zelf je platen
Zelfde nieuws in NL, http://www.scientias.nl/w(...)ef-zonnepaneel/31354
Dat zou een flinke omslag betekenen, dan hou je thuis nog energie over joh, met gelijk aantal panelen die nu geplaatst worden op je dak krijg je bijna 5x zoveel energie. Leuk voor de groeiende markt van elektrische auto's ook.
Dat zou een flinke omslag betekenen, dan hou je thuis nog energie over joh, met gelijk aantal panelen die nu geplaatst worden op je dak krijg je bijna 5x zoveel energie. Leuk voor de groeiende markt van elektrische auto's ook.
Linux is denken in oplossingen. Niet in producten. --== The kernel, the whole kernel and nothing but the kernel, so help me Linus! ==--
Daar zal de overheid blij van worden, allemaal burgers die onafhankelijk voorzien in hun eigen energie behoeften en dus niet minder afhankelijk zijn van derden.quote:
Zelfde nieuws in NL, http://www.scientias.nl/w(...)ef-zonnepaneel/31354
Dat zou een flinke omslag betekenen, dan hou je thuis nog energie over joh, met gelijk aantal panelen die nu geplaatst worden op je dak krijg je bijna 5x zoveel energie. Leuk voor de groeiende markt van elektrische auto's ook.
Jammer dat de eerste protypes pas over 5 jaar op de markt zijn. Voordat je goedkope productie modellen heb ben je 10 jaar verder
Zei de expertquote:
Weer zo'n uitvinding waar je nooit meer iets van hoort
"An educated citizenry is a vital requisite for our survival as a free people."
ScienceDaily: Your source for the latest research news and science breakthroughs
ScienceDaily (May 18, 2011) — An international team, of scientists, led by a team at Monash University has found the key to the hydrogen economy could come from a very simple mineral, commonly seen as a black stain on rocks.
Their findings, developed with the assistance of researchers at UC Davis in the USA and using the facilities at the Australian Synchrotron, was published in the journal Nature Chemistry on May 15, 2011.
Professor Leone Spiccia from the School of Chemistry at Monash University said the ultimate goal of researchers in this area is to create a cheap, efficient way to split water, powered by sunlight, which would open up production of hydrogen as a clean fuel, and leading to long-term solutions for our renewable energy crisis.
To achieve this, they have been studying complex catalysts designed to mimic the catalysts plants use to split water with sunlight. But the new study shows that there might be much simpler alternatives to hand.
"The hardest part about turning water into fuel is splitting water into hydrogen and oxygen, but the team at Monash seems to have uncovered the process, developing a water-splitting cell based on a manganese-based catalyst," Professor Spiccia said.
"Birnessite, it turns out, is what does the work. Like other elements in the middle of the Periodic Table, manganese can exist in a number of what chemists call oxidation states. These correspond to the number of oxygen atoms with which a metal atom could be combined," Professor Spiccia said.
"When an electrical voltage is applied to the cell, it splits water into hydrogen and oxygen and when the researchers carefully examined the catalyst as it was working, using advanced spectroscopic methods they found that it had decomposed into a much simpler material called birnessite, well-known to geologists as a black stain on many rocks."
The manganese in the catalyst cycles between two oxidation states. First, the voltage is applied to oxidize from the manganese-II state to manganese-IV state in birnessite. Then in sunlight, birnessite goes back to the manganese-II State.
This cycling process is responsible for the oxidation of water to produce oxygen gas, protons and electrons.
Co-author on the research paper was Dr Rosalie Hocking, Research Fellow in the Australian Centre for Electromaterials Science who explained that what was interesting was the operation of the catalyst, which follows closely natures biogeochemical cycling of manganese in the oceans.
"This may provide important insights into the evolution of Nature's water splitting catalyst found in all plants which uses manganese centres," Dr Hocking said.
"Scientists have put huge efforts into making very complicated manganese molecules to copy plants, but it turns out that they convert to a very common material found in the Earth, a material sufficiently robust to survive tough use."
The reaction has two steps. First, two molecules of water are oxidized to form one molecule of oxygen gas (O2), four positively-charged hydrogen nuclei (protons) and four electrons. Second, the protons and electrons combine to form two molecules of hydrogen gas (H2).
The experimental work was conducted using state-of-the art equipment at three major facilities including the Australian Synchrotron, the Australian National Beam-line Facility in Japan and the Monash Centre for Electron Microscopy, and involved collaboration with Professor Bill Casey, a geochemist at UC Davis.
"The research highlights the insight obtainable from the synchrotron based spectroscopic techniques -- without them the important discovery linking common earth materials to water oxidation catalysts would not have been made," Dr Hocking said.
It is hoped the research will ultimately lead to the development of cheaper devices, which produce hydrogen.
The work was primarily funded by the U.S. National Science Foundation and the U.S. Department of Energy Monash University, the Australian Research Council through the Australian Centre of Excellence for Electromaterials Science, and the Australian Synchrotron.
http://www.sciencedaily.com/releases/2011/05/110516102331.htm
zo nu hebben we ook een opslag medium.... klaar nu...weg met de olie..:D
ScienceDaily (May 18, 2011) — An international team, of scientists, led by a team at Monash University has found the key to the hydrogen economy could come from a very simple mineral, commonly seen as a black stain on rocks.
Their findings, developed with the assistance of researchers at UC Davis in the USA and using the facilities at the Australian Synchrotron, was published in the journal Nature Chemistry on May 15, 2011.
Professor Leone Spiccia from the School of Chemistry at Monash University said the ultimate goal of researchers in this area is to create a cheap, efficient way to split water, powered by sunlight, which would open up production of hydrogen as a clean fuel, and leading to long-term solutions for our renewable energy crisis.
To achieve this, they have been studying complex catalysts designed to mimic the catalysts plants use to split water with sunlight. But the new study shows that there might be much simpler alternatives to hand.
"The hardest part about turning water into fuel is splitting water into hydrogen and oxygen, but the team at Monash seems to have uncovered the process, developing a water-splitting cell based on a manganese-based catalyst," Professor Spiccia said.
"Birnessite, it turns out, is what does the work. Like other elements in the middle of the Periodic Table, manganese can exist in a number of what chemists call oxidation states. These correspond to the number of oxygen atoms with which a metal atom could be combined," Professor Spiccia said.
"When an electrical voltage is applied to the cell, it splits water into hydrogen and oxygen and when the researchers carefully examined the catalyst as it was working, using advanced spectroscopic methods they found that it had decomposed into a much simpler material called birnessite, well-known to geologists as a black stain on many rocks."
The manganese in the catalyst cycles between two oxidation states. First, the voltage is applied to oxidize from the manganese-II state to manganese-IV state in birnessite. Then in sunlight, birnessite goes back to the manganese-II State.
This cycling process is responsible for the oxidation of water to produce oxygen gas, protons and electrons.
Co-author on the research paper was Dr Rosalie Hocking, Research Fellow in the Australian Centre for Electromaterials Science who explained that what was interesting was the operation of the catalyst, which follows closely natures biogeochemical cycling of manganese in the oceans.
"This may provide important insights into the evolution of Nature's water splitting catalyst found in all plants which uses manganese centres," Dr Hocking said.
"Scientists have put huge efforts into making very complicated manganese molecules to copy plants, but it turns out that they convert to a very common material found in the Earth, a material sufficiently robust to survive tough use."
The reaction has two steps. First, two molecules of water are oxidized to form one molecule of oxygen gas (O2), four positively-charged hydrogen nuclei (protons) and four electrons. Second, the protons and electrons combine to form two molecules of hydrogen gas (H2).
The experimental work was conducted using state-of-the art equipment at three major facilities including the Australian Synchrotron, the Australian National Beam-line Facility in Japan and the Monash Centre for Electron Microscopy, and involved collaboration with Professor Bill Casey, a geochemist at UC Davis.
"The research highlights the insight obtainable from the synchrotron based spectroscopic techniques -- without them the important discovery linking common earth materials to water oxidation catalysts would not have been made," Dr Hocking said.
It is hoped the research will ultimately lead to the development of cheaper devices, which produce hydrogen.
The work was primarily funded by the U.S. National Science Foundation and the U.S. Department of Energy Monash University, the Australian Research Council through the Australian Centre of Excellence for Electromaterials Science, and the Australian Synchrotron.
http://www.sciencedaily.com/releases/2011/05/110516102331.htm
zo nu hebben we ook een opslag medium.... klaar nu...weg met de olie..:D
Volgens mij hetzelfde idee als Daniel Nocera:quote:
ScienceDaily: Your source for the latest research news and science breakthroughs
ScienceDaily (May 18, 2011) — An international team, of scientists, led by a team at Monash University has found the key to the hydrogen economy could come from a very simple mineral, commonly seen as a black stain on rocks.
...
The work was primarily funded by the U.S. National Science Foundation and the U.S. Department of Energy Monash University, the Australian Research Council through the Australian Centre of Excellence for Electromaterials Science, and the Australian Synchrotron.
http://www.sciencedaily.com/releases/2011/05/110516102331.htm
zo nu hebben we ook een opslag medium.... klaar nu...weg met de olie..:D
Daniel Nocera - in de komende 5 jaar een waterstofenergie revolutie(?)
Check verder ook de Bloombox, daarover is op youtube wel het een en ander te vinden. Vooral die korte docu van 60 minutes is wel interessant.
In de komende tien jaar zal het allemaal gaan veranderen, daarvan ben ik overtuigd. De stormachtige onwtikkeling van de pc en de mobiele telefoon zag men ook niet aankomen, maar binnen korte tijd waren ze daar en werden ze een onmisbaar deel van ons leven.
Ditzelfde zal gaan gebeuren op het gebied van energie in de komende tien jaar
"An educated citizenry is a vital requisite for our survival as a free people."
MIT’s New Liquid Flow Batteries Could Make Refueling EVs as Fast as Pumping Gas
A team of researchers at MIT set out to “reinvent the rechargeable battery” and succeeded by creating a liquid-flow battery, suitable for electric vehicles that can be recharged as quickly as simply pumping gas and could halve the cost of current EV batteries. The new batteries involve a semi-solid, liquid electrolyte material which holds suspended positive and negative electrodes that provide needed electricity. When all the energy has been zapped out of the amorphous material, you can simply remove it from the battery — recharge it for future use — and replace it with fully charged goo. The team at MIT envisions this happening in much the same way — and about the same amount of time — that we’re all used to pumping gas.
This kind of liquid flow battery is not new, but prior research teams were not able to find a material that had high enough energy density to make the batteries plausible. With lower energy density needed to make huge structures to hold the batteries, the MIT team has managed to find a material — shown above on the right — that ups the energy density of prior liquid flow batteries ten fold. This improvement made the structures small enough to be plausible for use in electric vehicles, large energy storage facilities as well as smaller applications.
The researchers came up with the idea for their liquid flow battery by combining the traditional positive and negative electrodes of a lithium-ion battery — now used in most electric vehicles — with the suspension ideas of a liquid flow battery. By suspending the positive and negative electrodes in the battery — in traditional lithium-ion batteries they are stationary — the team made it possible to replace the battery’s energy making system without having to recharge it within the batteries structure. By creating this new, less expensive design the research team believes they could bring down the cost of electric vehicles to make them more competitive with gas-powered vehicles.
http://www.zeitnews.org/t(...)efueling-faster.html
A team of researchers at MIT set out to “reinvent the rechargeable battery” and succeeded by creating a liquid-flow battery, suitable for electric vehicles that can be recharged as quickly as simply pumping gas and could halve the cost of current EV batteries. The new batteries involve a semi-solid, liquid electrolyte material which holds suspended positive and negative electrodes that provide needed electricity. When all the energy has been zapped out of the amorphous material, you can simply remove it from the battery — recharge it for future use — and replace it with fully charged goo. The team at MIT envisions this happening in much the same way — and about the same amount of time — that we’re all used to pumping gas.
This kind of liquid flow battery is not new, but prior research teams were not able to find a material that had high enough energy density to make the batteries plausible. With lower energy density needed to make huge structures to hold the batteries, the MIT team has managed to find a material — shown above on the right — that ups the energy density of prior liquid flow batteries ten fold. This improvement made the structures small enough to be plausible for use in electric vehicles, large energy storage facilities as well as smaller applications.
The researchers came up with the idea for their liquid flow battery by combining the traditional positive and negative electrodes of a lithium-ion battery — now used in most electric vehicles — with the suspension ideas of a liquid flow battery. By suspending the positive and negative electrodes in the battery — in traditional lithium-ion batteries they are stationary — the team made it possible to replace the battery’s energy making system without having to recharge it within the batteries structure. By creating this new, less expensive design the research team believes they could bring down the cost of electric vehicles to make them more competitive with gas-powered vehicles.
http://www.zeitnews.org/t(...)efueling-faster.html
"An educated citizenry is a vital requisite for our survival as a free people."
Dus, wanneer komen deze goedkope waterstofgenerators op de markt? Ik zal dit topique over een half jaartje maar weer eens kickenquote:
ScienceDaily: Your source for the latest research news and science breakthroughs
ScienceDaily (May 18, 2011) — An international team, of scientists, led by a team at Monash University has found the key to the hydrogen economy could come from a very simple mineral, commonly seen as a black stain on rocks.
Their findings, developed with the assistance of researchers at UC Davis in the USA and using the facilities at the Australian Synchrotron, was published in the journal Nature Chemistry on May 15, 2011.
Professor Leone Spiccia from the School of Chemistry at Monash University said the ultimate goal of researchers in this area is to create a cheap, efficient way to split water, powered by sunlight, which would open up production of hydrogen as a clean fuel, and leading to long-term solutions for our renewable energy crisis.
To achieve this, they have been studying complex catalysts designed to mimic the catalysts plants use to split water with sunlight. But the new study shows that there might be much simpler alternatives to hand.
"The hardest part about turning water into fuel is splitting water into hydrogen and oxygen, but the team at Monash seems to have uncovered the process, developing a water-splitting cell based on a manganese-based catalyst," Professor Spiccia said.
"Birnessite, it turns out, is what does the work. Like other elements in the middle of the Periodic Table, manganese can exist in a number of what chemists call oxidation states. These correspond to the number of oxygen atoms with which a metal atom could be combined," Professor Spiccia said.
"When an electrical voltage is applied to the cell, it splits water into hydrogen and oxygen and when the researchers carefully examined the catalyst as it was working, using advanced spectroscopic methods they found that it had decomposed into a much simpler material called birnessite, well-known to geologists as a black stain on many rocks."
The manganese in the catalyst cycles between two oxidation states. First, the voltage is applied to oxidize from the manganese-II state to manganese-IV state in birnessite. Then in sunlight, birnessite goes back to the manganese-II State.
This cycling process is responsible for the oxidation of water to produce oxygen gas, protons and electrons.
Co-author on the research paper was Dr Rosalie Hocking, Research Fellow in the Australian Centre for Electromaterials Science who explained that what was interesting was the operation of the catalyst, which follows closely natures biogeochemical cycling of manganese in the oceans.
"This may provide important insights into the evolution of Nature's water splitting catalyst found in all plants which uses manganese centres," Dr Hocking said.
"Scientists have put huge efforts into making very complicated manganese molecules to copy plants, but it turns out that they convert to a very common material found in the Earth, a material sufficiently robust to survive tough use."
The reaction has two steps. First, two molecules of water are oxidized to form one molecule of oxygen gas (O2), four positively-charged hydrogen nuclei (protons) and four electrons. Second, the protons and electrons combine to form two molecules of hydrogen gas (H2).
The experimental work was conducted using state-of-the art equipment at three major facilities including the Australian Synchrotron, the Australian National Beam-line Facility in Japan and the Monash Centre for Electron Microscopy, and involved collaboration with Professor Bill Casey, a geochemist at UC Davis.
"The research highlights the insight obtainable from the synchrotron based spectroscopic techniques -- without them the important discovery linking common earth materials to water oxidation catalysts would not have been made," Dr Hocking said.
It is hoped the research will ultimately lead to the development of cheaper devices, which produce hydrogen.
The work was primarily funded by the U.S. National Science Foundation and the U.S. Department of Energy Monash University, the Australian Research Council through the Australian Centre of Excellence for Electromaterials Science, and the Australian Synchrotron.
http://www.sciencedaily.com/releases/2011/05/110516102331.htm
zo nu hebben we ook een opslag medium.... klaar nu...weg met de olie..:D
.
Trots lid van het 👿 Duivelse Viertal 👿
Een gedicht over Maanvis
Het ONZ / [KAMT] Kennis- en Adviescentrum Maanvis Topics , voor al je vragen over mijn topiques!
Een gedicht over Maanvis
Het ONZ / [KAMT] Kennis- en Adviescentrum Maanvis Topics , voor al je vragen over mijn topiques!
Waar kan ik een offerte aanvragen voor zo'n zonnepaneel? Hier staat dat ze er nu al 1 hebben met 90% efficiëntie. Die wil ik wel kopen dan. En waarom 5 jaar rollout periode? Ze hebben het nu toch al?quote:
New solar product captures up to 95 percent of light energy
Efficiency is a problem with today's solar panels; they only collect about 20 percent of available light. Now, a University of Missouri engineer has developed a flexible solar sheet that captures more than 90 percent of available light, and he plans to make prototypes available to consumers within the next five years.
Patrick Pinhero, an associate professor in the MU Chemical Engineering Department, says energy generated using traditional photovoltaic (PV) methods of solar collection is inefficient and neglects much of the available solar electromagnetic (sunlight) spectrum. The device his team has developed – essentially a thin, moldable sheet of small antennas called nantenna – can harvest the heat from industrial processes and convert it into usable electricity. Their ambition is to extend this concept to a direct solar facing nantenna device capable of collecting solar irradiation in the near infrared and optical regions of the solar spectrum.
Working with his former team at the Idaho National Laboratory and Garrett Moddel, an electrical engineering professor at the University of Colorado, Pinhero and his team have now developed a way to extract electricity from the collected heat and sunlight using special high-speed electrical circuitry. This team also partners with Dennis Slafer of MicroContinuum, Inc., of Cambridge, Mass., to immediately port laboratory bench-scale technologies into manufacturable devices that can be inexpensively mass-produced.
"Our overall goal is to collect and utilize as much solar energy as is theoretically possible and bring it to the commercial market in an inexpensive package that is accessible to everyone," Pinhero said. "If successful, this product will put us orders of magnitudes ahead of the current solar energy technologies we have available to us today."
As part of a rollout plan, the team is securing funding from the U.S. Department of Energy and private investors. The second phase features an energy-harvesting device for existing industrial infrastructure, including heat-process factories and solar farms.
Within five years, the research team believes they will have a product that complements conventional PV solar panels. Because it's a flexible film, Pinhero believes it could be incorporated into roof shingle products, or be custom-made to power vehicles.
Once the funding is secure, Pinhero envisions several commercial product spin-offs, including infrared (IR) detection. These include improved contraband-identifying products for airports and the military, optical computing, and infrared line-of-sight telecommunications.
http://www.zeitnews.org/e(...)of-light-energy.html
Trots lid van het 👿 Duivelse Viertal 👿
Een gedicht over Maanvis
Het ONZ / [KAMT] Kennis- en Adviescentrum Maanvis Topics , voor al je vragen over mijn topiques!
Een gedicht over Maanvis
Het ONZ / [KAMT] Kennis- en Adviescentrum Maanvis Topics , voor al je vragen over mijn topiques!
Ze willen eerst kijken hoe mooi en luxe de fabriek en de kantoren moeten worden.quote:
[..]
Waar kan ik een offerte aanvragen voor zo'n zonnepaneel? Hier staat dat ze er nu al 1 hebben met 90% efficiëntie. Die wil ik wel kopen dan. En waarom 5 jaar rollout periode? Ze hebben het nu toch al?
En dan een goed plan bedenken om de consument zo veel mogelijk uit te knijpen.
Als het niet met een hamer te repareren is, is het een elektrisch probleem.
Feit met alle bovenstaande nieuwsberichten is dat het geen specialistische tijdschriften zijn. Het grootste gedeelte van de de bronnen in de berichten zijn de claims van onderzoekers zelfs, die dan vaak ook nog eens selectief gepubliceerd worden. Zoals al eerder genoemd, hoor je daar vaker niets meer van.
Als je werkelijk betrouwbaar nieuws in deze vakgebieden wil lezen moet je toch echt naar peer-reviewed papers gaan kijken. Dit zijn werkelijk wetenschappelijke papers die door een onderzoeksgroep gesteund worden, en die (voor zover mogelijk) geverifieerd worden door collega-wetenschappers in hetzelfde vakgebied.
Bovenstaand nieuws is allemaal heel leuk, maar bedenk voor jezelf eens: wat is meer waarschijnlijk? Dat al deze berichten echt waar zijn en de resultaten door oliebedrijven in de doofpot worden gestopt. Of dat het gewoon een stukje overdreven is, en een enthousiaste wetenschapper zijn kleinschalige resultaten extrapoleert naar een oplossing voor onze wereldproblemen.
Als je werkelijk betrouwbaar nieuws in deze vakgebieden wil lezen moet je toch echt naar peer-reviewed papers gaan kijken. Dit zijn werkelijk wetenschappelijke papers die door een onderzoeksgroep gesteund worden, en die (voor zover mogelijk) geverifieerd worden door collega-wetenschappers in hetzelfde vakgebied.
Bovenstaand nieuws is allemaal heel leuk, maar bedenk voor jezelf eens: wat is meer waarschijnlijk? Dat al deze berichten echt waar zijn en de resultaten door oliebedrijven in de doofpot worden gestopt. Of dat het gewoon een stukje overdreven is, en een enthousiaste wetenschapper zijn kleinschalige resultaten extrapoleert naar een oplossing voor onze wereldproblemen.
Ik vraag me af of het rendement nog steeds 90% blijft bij temperaturen hoger dan 40 graden. (Zoals dat vaak op een plat dak voorkomt tijdens de zomer).
Hoe dan ook een goed streven. Als dit de echte opbrengst is en de prijs rond de 2000, tot 3000 euro blijft wil ik wel zo'n ding hebben.
Hoe dan ook een goed streven. Als dit de echte opbrengst is en de prijs rond de 2000, tot 3000 euro blijft wil ik wel zo'n ding hebben.
Health In Harmony is een non-profitorganisatie die regenwoudgemeenschappen helpt met gezondheidszorg en duurzame inkomens in ruil voor bosbescherming, en zo tegelijk klimaatverandering en armoede aanpakt. - https://www.healthinharmony.org/
De huidige PV systemen zijn ook al interessant met een terugverdientijd van 12 jaar (bij een de huidige kwh prijs en zonder subsidie). Met een levensduur van 30 jaar op je 18 jaar gratis energie.quote:Op dinsdag 7 juni 2011 12:32 schreef SpecialK het volgende:
Ik vraag me af of het rendement nog steeds 90% blijft bij temperaturen hoger dan 40 graden. (Zoals dat vaak op een plat dak voorkomt tijdens de zomer).
Hoe dan ook een goed streven. Als dit de echte opbrengst is en de prijs rond de 2000, tot 3000 euro blijft wil ik wel zo'n ding hebben.
Hoe moeten wij nou weten wat meer waarschijnlijk is? Het klopt dat deze artikelen niet uit Nature komen, maar van een site waar dagelijks zo'n 7 a 8 artikelen verschijnen over mogelijke technologische doorbraken. En in het laatste artikel wordt bijv. MIT genoemd. Waarom zullen zij hun goeie naam te grabbel gooien?quote:
Bovenstaand nieuws is allemaal heel leuk, maar bedenk voor jezelf eens: wat is meer waarschijnlijk?
En de tijd dat Big-oil bepaalde hoe de wereld eruit zag is ook op zijn einde aan het lopen. Er zijn genoeg sillicon-valley uitvinders die de wereld willen verbeteren en inzien dat de petroleum-industrie een vijand is. Kijk bijv. naar hoe Daniel Nocera zijn waterstoftechnologie in de markt aan het zetten is. Hij heeft er alles aan gedaan om ervoor te zorgen dat Big-oil geen vinger in de pap kan krijgen.
Het is wereldwijd inmiddels voor de meeste mensen duidelijk dat we geen proactiviteit hoeven te verwachten van de olie-industrie en veel vooraanstaande wetenschappers weten ook dat in het verleden patenten zijn opgekocht waar vervolgens niets mee is gedaan. En deze wetenschappers hebben zelf ook kinderen en zullen de toekomst van hun kind voorop plaatsen ipv te zwichten voor het grote geld.
"An educated citizenry is a vital requisite for our survival as a free people."
Ik kwam bij die panelen die de overheid een aantal jaren met subsidie in onze buurt aanbood met een berekening op een terugverdientijd van minimaal 25 jaar. En Toen hield ik nog nieteens rekening met het drastische rendementsverlies die die dingen nu nog hebben bij temperaturen van > 40 C.quote:
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De huidige PV systemen zijn ook al interessant met een terugverdientijd van 12 jaar (bij een de huidige kwh prijs en zonder subsidie). Met een levensduur van 30 jaar op je 18 jaar gratis energie.
Mij nog niet gezien
Health In Harmony is een non-profitorganisatie die regenwoudgemeenschappen helpt met gezondheidszorg en duurzame inkomens in ruil voor bosbescherming, en zo tegelijk klimaatverandering en armoede aanpakt. - https://www.healthinharmony.org/
Een aantal jaar was de prijs per WP inderdaad 2x zo hoog. Wat dat betreft zijn zonnepanelen de laatste paar jaar enorm in prijs gedaald.quote:Op dinsdag 7 juni 2011 22:15 schreef SpecialK het volgende:
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Ik kwam bij die panelen die de overheid een aantal jaren met subsidie in onze buurt aanbood met een berekening op een terugverdientijd van minimaal 25 jaar. En Toen hield ik nog nieteens rekening met het drastische rendementsverlies die die dingen nu nog hebben bij temperaturen van > 40 C.
Mij nog niet gezien
Binnenkort kopen we speciale inkt voor onze deskjet-printers en dan printen we de zonnepanelen gewoon uit!
The sheet of paper looks like any other document that might have just come spitting out of an office printer, with an array of colored rectangles printed over much of its surface. But then a researcher picks it up, clips a couple of wires to one end, and shines a light on the paper. Instantly an LCD clock display at the other end of the wires starts to display the time.
Almost as cheaply and easily as printing a photo on your inkjet, an inexpensive, simple solar cell has been created on that flimsy sheet, formed from special “inks” deposited on the paper. You can even fold it up to slip into a pocket, then unfold it and watch it generating electricity again in the sunlight.
The new technology, developed by a team of researchers at MIT, is reported in a paper in the journal Advanced Materials, published online July 8. The paper is co-authored by Karen Gleason, the Alexander and I. Michael Kasser Professor of Chemical Engineering; Professor of Electrical Engineering Vladimir Bulovi?; graduate student Miles Barr; and six other students and postdocs. The work was supported by the Eni-MIT Alliance Solar Frontiers Program and the National Science Foundation.
The technique represents a major departure from the systems used until now to create most solar cells, which require exposing the substrates to potentially damaging conditions, either in the form of liquids or high temperatures. The new printing process uses vapors, not liquids, and temperatures less than 120 degrees Celsius. These “gentle” conditions make it possible to use ordinary untreated paper, cloth or plastic as the substrate on which the solar cells can be printed.
It is, to be sure, a bit more complex than just printing out a term paper. In order to create an array of photovoltaic cells on the paper, five layers of material need to be deposited onto the same sheet of paper in successive passes, using a mask (also made of paper) to form the patterns of cells on the surface. And the process has to take place in a vacuum chamber.
The basic process is essentially the same as the one used to make the silvery lining in your bag of potato chips: a vapor-deposition process that can be carried out inexpensively on a vast commercial scale.
The resilient solar cells still function even when folded up into a paper airplane. In their paper, the MIT researchers also describe printing a solar cell on a sheet of PET plastic (a thinner version of the material used for soda bottles) and then folding and unfolding it 1,000 times, with no significant loss of performance. By contrast, a commercially produced solar cell on the same material failed after a single folding.
“We have demonstrated quite thoroughly the robustness of this technology,” Bulovi? says. In addition, because of the low weight of the paper or plastic substrate compared to conventional glass or other materials, “we think we can fabricate scalable solar cells that can reach record-high watts-per-kilogram performance. For solar cells with such properties, a number of technological applications open up,” he says. For example, in remote developing-world locations, weight makes a big difference in how many cells could be delivered in a given load.
Gleason adds, “Often people talk about deposition on a flexible device — but then they don’t flex it, to actually demonstrate” that it can survive the stress. In this case, in addition to the folding tests, the MIT team tried other tests of the device’s robustness. For example, she says, they took a finished paper solar cell and ran it through a laser printer — printing on top of the photovoltaic surface, subjecting it to the high temperature of the toner-fusing step — and demonstrated that it still worked. Test cells the group produced last year still work, demonstrating their long shelf life.
In today’s conventional solar cells, the costs of the inactive components — the substrate (usually glass) that supports the active photovoltaic material, the structures to support that substrate, and the installation costs — are typically greater than the cost of the active films of the cells themselves, sometimes twice as much. Being able to print solar cells directly onto inexpensive, easily available materials such as paper or cloth, and then easily fasten that paper to a wall for support, could ultimately make it possible to drastically reduce the costs of solar installations. For example, paper solar cells could be made into window shades or wallpaper — and paper costs one-thousandth as much as glass for a given area, the researchers say.
For outdoor uses, the researchers demonstrated that the paper could be coated with standard lamination materials, to protect it from the elements.
http://www.zeitnews.org/e(...)me-a-solar-cell.html
The sheet of paper looks like any other document that might have just come spitting out of an office printer, with an array of colored rectangles printed over much of its surface. But then a researcher picks it up, clips a couple of wires to one end, and shines a light on the paper. Instantly an LCD clock display at the other end of the wires starts to display the time.
Almost as cheaply and easily as printing a photo on your inkjet, an inexpensive, simple solar cell has been created on that flimsy sheet, formed from special “inks” deposited on the paper. You can even fold it up to slip into a pocket, then unfold it and watch it generating electricity again in the sunlight.
The new technology, developed by a team of researchers at MIT, is reported in a paper in the journal Advanced Materials, published online July 8. The paper is co-authored by Karen Gleason, the Alexander and I. Michael Kasser Professor of Chemical Engineering; Professor of Electrical Engineering Vladimir Bulovi?; graduate student Miles Barr; and six other students and postdocs. The work was supported by the Eni-MIT Alliance Solar Frontiers Program and the National Science Foundation.
The technique represents a major departure from the systems used until now to create most solar cells, which require exposing the substrates to potentially damaging conditions, either in the form of liquids or high temperatures. The new printing process uses vapors, not liquids, and temperatures less than 120 degrees Celsius. These “gentle” conditions make it possible to use ordinary untreated paper, cloth or plastic as the substrate on which the solar cells can be printed.
It is, to be sure, a bit more complex than just printing out a term paper. In order to create an array of photovoltaic cells on the paper, five layers of material need to be deposited onto the same sheet of paper in successive passes, using a mask (also made of paper) to form the patterns of cells on the surface. And the process has to take place in a vacuum chamber.
The basic process is essentially the same as the one used to make the silvery lining in your bag of potato chips: a vapor-deposition process that can be carried out inexpensively on a vast commercial scale.
The resilient solar cells still function even when folded up into a paper airplane. In their paper, the MIT researchers also describe printing a solar cell on a sheet of PET plastic (a thinner version of the material used for soda bottles) and then folding and unfolding it 1,000 times, with no significant loss of performance. By contrast, a commercially produced solar cell on the same material failed after a single folding.
“We have demonstrated quite thoroughly the robustness of this technology,” Bulovi? says. In addition, because of the low weight of the paper or plastic substrate compared to conventional glass or other materials, “we think we can fabricate scalable solar cells that can reach record-high watts-per-kilogram performance. For solar cells with such properties, a number of technological applications open up,” he says. For example, in remote developing-world locations, weight makes a big difference in how many cells could be delivered in a given load.
Gleason adds, “Often people talk about deposition on a flexible device — but then they don’t flex it, to actually demonstrate” that it can survive the stress. In this case, in addition to the folding tests, the MIT team tried other tests of the device’s robustness. For example, she says, they took a finished paper solar cell and ran it through a laser printer — printing on top of the photovoltaic surface, subjecting it to the high temperature of the toner-fusing step — and demonstrated that it still worked. Test cells the group produced last year still work, demonstrating their long shelf life.
In today’s conventional solar cells, the costs of the inactive components — the substrate (usually glass) that supports the active photovoltaic material, the structures to support that substrate, and the installation costs — are typically greater than the cost of the active films of the cells themselves, sometimes twice as much. Being able to print solar cells directly onto inexpensive, easily available materials such as paper or cloth, and then easily fasten that paper to a wall for support, could ultimately make it possible to drastically reduce the costs of solar installations. For example, paper solar cells could be made into window shades or wallpaper — and paper costs one-thousandth as much as glass for a given area, the researchers say.
For outdoor uses, the researchers demonstrated that the paper could be coated with standard lamination materials, to protect it from the elements.
http://www.zeitnews.org/e(...)me-a-solar-cell.html
"An educated citizenry is a vital requisite for our survival as a free people."
