Wind Energy in Oklahoma

Oklahoma's pro-business climate and excellent wind resource have helped to attract wind developers from across the country and the globe.

Geothermal resources used to produce renewable electricity in western states

Geothermal plants are virtually emissions free, and unlike renewable sources such as wind and solar, they provide an available, dispatchable source of baseload power that is able to operate at a relatively high capacity factor.

Green growth: an operational tool (and GDP has had its day…)

Natural capital, made up of several elements that nature provides us with as the sustenance and basis of our society (soil, raw materials, water, clean air, …) has an economic value: today any growth model that ignores this by now shared knowledge can no longer work.

Optimizing Solar Plant Implementation

In this paper, we will focus on a theoretical study and its application to a concrete site. We will try to answer the question: How can we optimize the implementation of horizontal trackers on a solar plant?

Solar Powered Generators & Energy Efficiency, Go Hand In Hand

Energy Efficiency is all about optimal and responsible power use and this is also exactly how one gets the most energy out of their solar generator.

10 Questions to Ask Before Hiring a Solar Installer

Going solar should be a great experience - not a headache, and doing your homework upfront will give you something money can't buy - peace of mind.

Strange bedfellows: Solar power meets oil drilling

A company that uses solar energy to recover crude has scored big financing from some major oil players—and highlights a growing niche of global oil exploration.   GlassPoint Solar last week landed a $53 million investment from Royal Dutch Shell and the sovereign investment fund of Oman for its enhanced oil recovery (EOR) technology. In a twist of irony, GlassPont's technology runs on solar power, which produces steam to help pump more fossil fuel from conventional crude plays.   GlassPoint has been using this technique in Oman since 2012, and it helped the firm score more than double its initial funding. Given the age of its oil fields, Oman relies on EOR—a complex process that extracts more oil than traditional drilling—to boost production.   Although EOR is common to the oil industry, using the power of the sun "is expanding very rapidly, and is a very new technology" said Rod MacGregor, GlassPoint's CEO, in an interview. "This application looks like the next step for solar."

World's Largest Single Rooftop Solar Power Project Commissioned In India

Indian solar energy companies are fast delivering world-class solar power projects as the market expands based on favorable regulatory and policy outlooks.   India’s largest engineering, procurement and construction (EPC) company in the solar power market has just commissioned the world’s largest single rooftop solar photovoltaic power project. The 7.52 MW solar power plant has been commissioned in the northern state of Punjab.   Larsen and Toubro has been involved in the construction of several solar power projects that will be seen as major milestones in India’s solar power infrastructure expansion. The company reported that it has already commissioned or is working on solar power projects with total capacity of 400 MW. This includes the largest solar thermal power plant in Asia – Reliance Power’s 125 MW linear Fresnel power project located in Rajasthan. The company has also worked on several other solar power projects under the National Solar Mission.   Punjab has some of highest power tariffs in the country. Being an agricultural state, power supply to the farmers is of paramount importance, while industries and commercial users are low on the priority list. In the absence of adequate supply, the utility procures power from short-term markets, which increases the overall costs which, in turn, is passed on the industrial and commercial consumers.

UC makes largest solar-energy purchase by U.S. higher education institution

The University of California announced Monday that it signed two power-purchase agreements that, combined, will provide 206,000 megawatt hours of solar energy per year — the largest solar energy purchase by any higher education institution in the U.S.   This energy is equivalent to powering 30,000 homes and will avoid producing more than 88,000 metric tons of carbon dioxide per year. The initiative will provide power for UC Irvine, UC San Diego and UC San Francisco, along with their medical centers, in addition to UC Merced and UC Santa Cruz.   Mark Byron, the university’s wholesale electricity program manager, described the purchase as a “nexus” with UC President Janet Napolitano’s sustainability initiative, which was released November. One of the main components of the initiative is to be carbon neutral by 2025.   “By injecting solar energy, we’re making sure our portfolio comes from green energy,” Byron explained.   The university signed the 25-year agreements with Frontier Renewables, a San Mateo-based company focused on solar energy technology. Two solar fields will be built in Fresno County as part of the project.

Sharp Considering Sale Of U.S. Solar Energy Unit

Sharp Corp is looking to sell its U.S.-based solar energy development unit Recurrent Energy, Bloomberg reported on Monday, as the Japanese firm winds down its involvement in the solar industry to focus on profitable businesses. Sharp paid $305 million in cash in 2010 to acquire Recurrent Energy. Selling the company now would help Sharp to raise capital as it struggles to raise its equity ratio to a healthy level. This year, Sharp shut down its UK solar plant and also pulled out of a venture with Italian energy firm Enel SpA  to make solar panels and generate solar power.

Flexible solar cell woven into fabric

Wearable electronics are quickly becoming the fashion. And there could soon be a way to power those electronics indefinitely, now that scientists in China have developed a solar cell 'textile' that could be woven into clothes. The textile retains a power-generation efficiency close to 1% even after been bent more than 200 times, and can be illuminated from both sides.   Scientists have been looking into flexible solar cells for decades, partly for coating irregularly shaped objects but also for integrating into wearable fabrics. One popular line of investigation has been dye-sensitized solar cells, in which a pigment absorbs sunlight to generate electrons and their positive counterparts, holes, before passing on those charges to inexpensive semiconductors. These solar cells are cheap and flexible, but the liquid nature of their pigments means that they must be well sealed. Bend a dye-sensitized solar cell more than a few times and the seals are likely to break, destroying its light-harvesting properties.   That is why Huisheng Peng at Fudan University in Shanghai and colleagues have been exploring another option: polymer solar cells. Although their maximum efficiencies fall below 10% - about half that of crystalline silicon, the most prevalent solar cell - polymer solar cells are lightweight, flexible and easy to manufacture. Peng and colleagues' solar cell textile consists of microscopic interwoven metal wires coated with an active polymer (to absorb the sunlight), titanium dioxide nanotubes (to conduct the electrons) and another active polymer (to conduct the holes). The researches coated each side of the textile with transparent, conductive sheets of carbon nanotubes, which complete the circuit.

Value of Solar Versus Fossil Fuels - Part 2

The value of solar power is being debated across the country by regulators, utility companies, and solar energy providers as distributed generation is increasing. This Energy and Policy Institute series consists of four separate reports summarizing recent developments, while providing recommendations for policy makers.

Energy Sources in a Disaster

Businesses need to invest in back-up renewable power systems to insure that they can continue working during and after a disaster. With such installations, businesses can prevent interruption losses caused by grid failure.

Unlikely Bedfellows: Mines That Run On Solar Or Wind Power

As mining companies continue to evaluate their power options in an era of higher diesel fuel and electricity costs, it is interesting to contemplate whether they could one day foresee operating in an environment more weighted towards renewables than conventional energy.

One With The Roof

Installers working on a tile roof must deal with particularly difficult challenges. Tile roofs are manufactured from many types of materials, including clay, zinc coated aluminum, concrete, wood and fiberglass, all of which come in a wide range of shapes and sizes. Installing solar panels on a tile roof takes more time than traditional asphalt shingle roofs and often requires additional framing.

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