VODA - nova stara energija

Viktor Scauberger - neverjetno!!! Voda kot gorivo za življenje...Dober prispevek ORF - tudi o gozdarstvu.



Tudi Nizozemci že delajo na temu.

Avstrijci pa še posebaj - del 1 2 3 4
in zadnji 5 del

PRVO SREČANJE SLOVENSKIH ŠTUDENTOV

Končno smo se uspeli časovno uskladiti. Zbrali smo se v Bornsesteegu v študentskem dom. Po skoraj enem letu smo spoznali, da nas je kar nekaj. Kasneje se nam je pridružil še prijatelj s Hrvaške. Srečanje se je uglasilo tako prav po slovensko. Malo pijače in jedače ter polno zabave.

Menda so tudi drugi Slovenci tu, vendar se težko najdemo, ker večinoma govorimo angleško in se potem niti ne čuje slovenskega jezika. Je pa srečanje sovpadlo tudi z mojim rojstnim dnevom, tako da smo nazdravili tudi na to.

Je le lepo govoriti v materinem jeziku in se šaliti tako, da ljudje šale tudi razumejo; ni kulturnih razlik in ovir.

Adaptive management

Zanimivo - Canada- Buzz Holling

Nova televizija

ZANIMIVO predavanje - kako narediš multinacionalko iz tega, ker žena nima mleka za dojenje;
in vloga inženirejv...

Sonce in elektrika

Solar 'competitive with coal' by 2010

Environmental Finance, 5 April 2007 - The cost of the cheapest solar power could be on par with that of electricity from coal plants by 2010, according to Photon Consulting.

The Boston, Massachusetts-based firm predicts that solar electricity will cost $0.18/kWh in Germany, $0.13 in California and $0.12/kWh in Spain by 2010 – while industry leaders will be able to bring that latter price down to $0.10/kWh, equivalent to the retail cost of electricity from a new coal-fired power plant.

"These economics could quickly result in a very large market opportunity for solar energy," the company said, estimating that, by 2010, solar electricity will cost less than the retail electricity price for 50% of residential customer in OECD countries.

However, the study – The True Cost of Solar Power – suggests that the makers of solar photovoltaic systems are not likely to pass the full cost reductions through to customers, offering "an excellent opportunity to expand their earnings in the coming years".

"Prices for solar electricity [systems] in 2004 have become disconnected from costs. Because the demand is much greater than the supply, a reduction in cost will not automatically trickle down to the consumer," said Michael Rogol, one of the study's authors.

"This scenario will likely continue for several years, with solar prices remaining strong due to very large demand," he added.

DENAR KOT DOLG

Lep dan daleč stran

Še en lep pomladni dan.

Solarna Energija Prihodnosti

Solar Cell Breaks the 40% Efficiency Barrier

GLOBE-Net, 7 December 2006 - A concentrator solar cell produced by Boeing-Spectrolab has recently achieved a conversion efficiency of 40.7%, breaking the previous world-record of 30%. According to the U.S. Department of Energy, which partly funded the project, the breakthrough may lead to systems with an installation cost of only $3 per watt, producing electricity at a cost of 8-10 cents per kilowatt/hour, making solar electricity more cost-competitive with traditional power sources.

Industry experts have pointed out that the cell is only suitable for high-tech applications such as space travel, due to its high cost. The important figure that determines a solar system's overall effectiveness is the output of power from an entire module, or the actual electricity vailable for use, which can be much lower than individual cell efficiency. Even so, the new mark is a positive step for solar technology. Most solar cell modules do not concentrate sunlight but use only what the sun produces naturally. This is what researchers call "one sun isolation," which achieves an efficiency of 12 to 18 percent. However, by using an optical concentrator, sunlight intensity can be increased, squeezing more electricity out of a single solar cell. The previous record of 30% efficiency was held by a Stirling engine , a closed-cycle heat engine, driven by a concentrating collector.

The efficient cell was developed using a unique structure called a multi-junction solar cell. This type of cell achieves a higher efficiency by capturing more of the solar spectrum. In a multi-junction cell, individual cells are made of layers, where each layer captures part of the sunlight passing through the cell. This allows the cell to get more energy from the sun's light.

For the past two decades researchers have tried to break the �40 percent efficient� barrier on solar cell devices. In the early 1980s, research began on what are known as �multi-junction gallium arsenide-based solar cell devices,� multi-layered solar cells which converted about 16 percent of the sun's available energy into electricity. In 1994, the U.S. National Renewable Energy laboratory broke the 30 percent barrier. Most satellites today use these multi-junction cells.

By 2015, the DOE projects that America will have enough solar energy systems installed to provide power to one to two million homes, at a cost of 5 to 10 cents per kilowatt/hour.

For comparison, coal is currently one of the cheapest power sources, producing electricity for around 3 to 5 cents per kilowatt hour, though it results in emissions of greenhouse gases and toxic air pollutants such as sulphur dioxide and mercury.

Canada currently has limited solar power capacity installed, but large areas of the country are suitable for solar energy, despite perceptions that the northern climate will not provide enough sunlight.

The Canadian Solar Industries Association (CanSIA) reports that sales of grid connected solar photovoltaic systems in Ontario rose by over 400% in the first half of 2006, a direct result of the province's recently announced standard offer program, which offers 42 cents per kilowatt-hour for PV generated electricity.

Over 250 kW of grid connected solar PV systems have been installed in Ontario this year, estimates CanSIA. This compares to a total installed capacity of 110 kW for the entire country in 2004, as reported by Natural Resources Canada using the most recent data available.

BC-based Day4 Energy Inc. is a Canadian firm that is currently developing a proprietary technology for contacting and interconnecting crystalline silicon photovoltaic cells. Their modules, which include �one-sun� flat panel models as well as those designed to operate under sun concentration ratios of up to 7-times above normal levels, can achieve 14.4% efficiency, which is in the high-range for commercial products.

Bruselj

Zanimiva konferenca - 31.1.2007 o eko-inovacijah in financiranju le teh.

Srečno 2007

Ljubo doma, kdor ga ima. Prazniki, družina, prijatelji in vse tisto, kar nam dela življenje lepo. Naj bo lepo tudi letos.