A new kind of polymer solar cell that is almost 70 percent transparent to the human eye could give windows the ability to generate electricity by absorbing mostly infrared, not visible, light. (Source: UCLA)
Good point, kodaiflow. Like many alternative energy technologies, especially those taking advantage of existing semiconductor infrastructure, the big push has been to make the technology a) work efficiently and b) be manufacturable. I wonder how much LCA studies have been done--that would be really interesting to know, although there may also not be enough data yet.
I think the main question is mean life span. This currently is the largest draw back to PV in it's current form. If these units can produce power for 30 years at a constant level then they justify the investment. The average solar panel that people are rushing to put on their roofs will have a life span (90% of peak) of about 10 years. In that time they may only generate 50% of the energy used to fabricate them.
Mydesign, your impression is incorrect. The US has been experiencing a major economic downturn for several years, including many people losing their jobs and their homes. Also, per capita average income figures are highly misleading, since a given dollar amount often buys much less here than it does in India. Classic examples are the costs for surgery and prescription drugs. In any case, it's a complex picture, especially when making comparisons.
Ann, that’s surprising for me. I though all US citizens are financially well settled peoples. As far as my knowledge, the per capital income of US citizens are more than 10 times of Indian citizens. Through my previous post, I mentioned about the government initiatives for promoting solar energy.
Yes, Ann, that's what I was wondering. I don't know the proper percentages, but say an average high effieciency window block 65% of a certain type of energy (heat, uv, whatever). If the solar cells take out 25% by themselves, that might mean that the cost of the base window could be reduced by eliminating an amount of the doping, and thereby helping to offset some of the cost of the solar cells.
Mydesign, that does resemble some US programs. However, because the cost of installing solar can be around $20,000 (depending on several variables), an often-quoted figure, "only" 40% would be $8,000. Not many people have that amount available for this purpose, even in installments.
Ann, do you know how that compares with your standard high-efficiency home or office window? Just thinking that if this has similar optical properties, there might be a savings in the base cost of the glass that would normally by used (by reducing the amount of "doping chemicals" which would help in the implementation of soemthing like this.
Ann, in the scheme which I mentioned, the upfront cost is only 40% of the total cost and the rest is a subsidy from government, which goes directly to the service provider’s account. So customer has to pay only 40% of total cost, that too in interest free installments (2-6 EMI based on various schemes from different companies).
A recent report sponsored by the American Chemistry Council (ACC) focuses on emerging gasification technologies for converting waste into energy and fuel on a large scale and saving it from the landfill. Some of that waste includes non-recycled plastic.
Capping a 30-year quest, GE Aviation has broken ground on the first high-volume factory for producing commercial jet engine components from ceramic matrix composites. The plant will produce high-pressure turbine shrouds for the LEAP Turbofan engine.
Seismic shifts in 3D printing materials include an optimization method that reduces the material needed to print an object by 85 percent, research designed to create new, stronger materials, and a new ASTM standard for their mechanical properties.
A recent study finds that 3D printing is both cheaper and greener than traditional factory-based mass manufacturing and distribution. At least, it's true for making consumer plastic products on open-source, low-cost RepRap printers.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.