Antireflection Coatings for Solar Photovoltaic Cell Efficiency
Photovoltaic cell efficiency may soon get a big boost, thanks to next-generation antireflection coatings crafted from nanomaterials capable of cutting down on the amount of light reflected away from a cell's surface.
Materials boasting a "tunable" refractive index have been developed within the past few years, and they show tremendous potential for photovoltaic applications. Professor E. Fred Schubert, of Rensselaer Polytechnic Institute's Department of Electrical, Computer, and Systems Engineering, is investigating ways to exploit this newly gained controllability and will present his findings at the upcoming AVS 59th International Symposium and Exhibition, held Oct. 28 - Nov. 2, in Tampa, Fla.
The refractive index is the property of a material that changes the speed of light, and is computed as the ratio of the speed of light in a vacuum to the speed of light through the material. Among the most fundamental properties of optical materials, the refractive index determines important optical characteristics such as Fresnel reflection, Bragg reflection, Snell refraction, diffraction, and the phase and group velocity of light.
Air and other gases have a refractive index very close to 1.0, but unfortunately aren't viable for thin-film optoelectronic applications. Among transparent dense materials suitable for use in thin-film optoelectronic applications, magnesium fluoride (MgF2) has the lowest refractive index (n=1.39); no dense materials with a lower refractive index are known to exist.
Fuel Cell Basics for Communications Industry Professionals
Fuel cells are a viable, commercial product addressing needs to a number of site issues. Using them to address your network needs increases reliability, decreases maintenance costs and promotes a healthy environment.
Commerce Dept. Issues Final Determination Regarding Tariffs on Chinese PV Cells
In its final determination, the Dept. of Commerce found dumping margins ranging from 18.32% to 249.96% and countervailable subsidies ranging from 14.78% to 15.97%.
Energy Monitoring Boosts Bottom Line for Small Businesses
Commercial buildings account for 19% of the energy consumed in the United States. Office buildings make up the largest sector of building type within the commercial sector, comprising 17% of all commercial buildings in the U.S, as well as 17% of the energy.
Are Green Energy Co-ops in Our Future?
One success story is Ecopower, a Belgian cooperative that funds renewable energy projects. Funds are collected from members (the cooperative currently has 40,000), and invested in self-developed projects, like power plants running on vegetable oil or wind turbines. Shareholders can buy shares for $325 each, and each shareholder receives a vote in the cooperative's general meeting with profits for individual shareholders limited to 6%, because of its cooperative standing.
EV Charging Station Test System
There are three primary areas where testing EV charging stations is critical - development, installation and maintenance.
Myths and Realities of Solar Photovoltaic Systems in Pakistan
Solar Energy Systems commonly used in Pakistan are Solar PV systems, Solar Water Heating systems, Solar Lighting Systems and Solar Pumping Systems. Generally the users do not appear to be satisfied with the solar system in use. Here we discuss what are the myths and realities causing dissatisfaction to users in Pakistan.
Jatropha 2.0 - Biofuel Breakthrough
SGB's crop improvement platform is highlighted by aggressive breeding and selection via the largest, most diverse library of Jatropha genetic material in the world, and supported by the application of sophisticated genotyping and molecular breeding tools designed to shorten breeding cycles.
Grid Energy Storage Solutions
Storage should be a net cost savings. For example, the cost of frequency regulation is less (on margin) using storage than using a thermal plant. The PJM Performance-Based Regulation market, operational since October 1, 2012, has demonstrated that using fast and accurate energy storage resources has and will lower the total need for frequency regulation, in which should result in overall lower costs to consumers.
The Photovoltaic Backsheet Market
The greatest challenge for backsheet manufacturers is to develop product that meets strict performance requirements and industry standards, at a time when there is increasing pressure to reduce costs.
The Myth of Affordable Energy
Here's an interview with economist Ed Dolan who lets us in on a few secrets about oil prices, the prospects for cheap energy, Russia's growing uncertainty and how the natural gas boom is hindering renewable energy efforts. Contributed by Oilprice.com
Small Wind Case Studies
Here are 4 diversified project case studies illustrating how small wind systems can make a difference.
SECUSOL Caught the Island Fever: Solar Hot Water by Wagner Solar on Star Island
The exceptional operational safety and ease of use are important criteria for the installation on Star Island, because technical support here usually is not available at short notice.
The Jamieson Laboratories Rooftop Solar Project
The rooftop installation consists of 2,200 panels producing approximately 650KW annually. The funds received are credited to the Jamieson utilities account and are offsetting almost 20% of the electricity bill.
Hanwha SolarEnergy America
Hanwha has the development capital and balance sheet that financiers look for in a partner. This is a tremendous differentiator given the current market conditions.
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