While cable music channels urge their viewers to unplug their cellphone chargers and businesses strive to understand how big their carbon footprint is and how to reduce it, many authorities, city business districts, industrial sites and campuses are already turning to robust, tried and true solutions without waiting for magic-wand policies or revolutionary technologies. This explains why we're seeing renewed interest in district heating and cooling systems around the world.

A new vision to reduce greenhouse gas emissions gains national attention & support Press Release from American Solar Energy Society Boulder, Colorado, USA

A new vision?

SunPower Corp., a Silicon Valley-based manufacturer of high-efficiency solar cells, solar panels and solar systems, inaugurated its second solar cell fabrication facility, referred to as cell Fab 2, in the Philippines earlier this week.

A small team of engineers based in Cornwall, England, have made a breakthrough with the development of a turbine that they claim could solve the commercial viability of tidal power. Known as the Osprey turbine, the technology can be used to create electricity offshore at sea -- or in tidal rivers and inland waterways. The Osprey turbine is a vertical axis free flow device which produces power independently or as part of a larger system. Power output is expected to be from 1 kW up to 5 MW in a multiple system.

Two new solar communities with 20 homes combined are due to be completed in Gilroy, California by the end of the year each outfitted with a BP Solar solar electric system. "We all need to do our part to meet the California Solar Initiative, and this is definitely a step in the right direction. I'm glad to see the residents of Gilroy have solar available in the most economic way, which is having it installed during construction, rather than later as an add-on." Al Pinheiro, Mayor of Gilroy

The Green Building Exchange [Its a shop!] held its grand opening Saturday in Redwood City, Calif. It is the first shopping and meeting center of its kind serving home buyers, builders and nonprofit groups. Products on display include solar panels, recycled renovation materials and low-toxic furniture.

WTC, a Munich, Germany-based consulting company, has tracked down more than 130 international manufacturers which are involved in the thin-film solar cell production process-from the cutting edge pilot lines to the major manufacturing plants-and has created a solar cells database listing.

Shell WindEnergy Inc. and TXU Corp. subsidiary Luminant announced on July 27 a joint development agreement for a 3,000 megawatt (MW) wind project in the Texas Panhandle

British Gas launched what it calls Britain's "greenest" available energy tariff today. It will cost gas and electricity customers on average £84 per year more than the firm's standard dual fuel deal. The launch reflects high customer demand which is pushing green energy tariffs into the mainstream, according to British Gas. Energy regulator Ofgem last month put forward plans for a star-rating system to help customers understand the array of green tariffs on offer.

When it comes to climate change, Bangladesh--with 140 million mostly poor residents and low-lying coastal geography--is among the most vulnerable nations on Earth. As part of the country's effort to prepare and adapt, Bangladesh government agencies are attempting to take global projections of climate change and turn them into highly local predictions.

Companies investing in renewable energy may begin asking a familiar question following FPL Group Inc.'s second-quarter results: What happens when the wind doesn't blow or the sun doesn't shine?

It rains year round in Germany. Clouds cover the skies for about two-thirds of all daylight hours. Yet the country has managed to become the world's leading solar power generator.

Rep. Tom Udall, D-N.M., proposes making the biggest utilities across the nation acquire 20% of their electricity from renewable energy sources like wind, solar and geothermal power by 2020. The plan is gaining momentum as the House of Representatives readies for debate on a massive energy bill this week.

IBM may become a player in the solar cell business within the next 18-24 months. The company has made overtures about solar since 1978, but recently has become more active, obtaining about a dozen patents in the area recently. They are said to be developing both both advanced crystalline technologies and CIGS processes with the potential for very high efficiency multi-junction cells in the foreseeable future.

When completed in 2011 this thermal solar project will be the largest in the world, generating 553 megawatts of power for Pacific Gas & Electric in the Mojave Desert in California. The plant is being built by Israeli company, Solel Solar Systems of Beit Shemes, Israel, a successor company to the people that built the nine thermal solar plants in the Mojave Desert, that have operated over the past 20 years and are currently generating 354 MW of electricity.

Maglev Wind Turbine Technologies to Start Operations Sierra Vista, Arizona [RenewableEnergyAccess.com] Proposes to build one gigawatt wind turbine requiring less than 100 acres and working at wind speed up to ~150km/h.

As fuel cell technologies are developed, hydrogen-powered vehicles are receiving more interest. The hydrogen economy, particularly hydrogen-powered vehicle penetration into the Korean transportation market, is studied in this paper. Market share was predicted using the currently available data. The results showed that the hydrogen era will not be as bright as predicted by many people. The main barrier is the fuel cell cost.

The storage of cold with ice slurries - a special type of thermally multi-functional fluids or phase change slurries (PCS) - is discussed. At first an example of a calculation of a thermal energy storage tank in an ice slurry system with a peak load demand is presented.

This paper is focussed on thermal storage technologies using phase change materials (PCMs) in the temperature range of 120-300°C for solar thermal power generation and high temperature process heat. As the state-of-the-art reference system a steam accumulator is described, which typically has a volume-specific thermal energy density of 20-30 kWh m-3.

A novel form-stable phase change wallboard (PCW) was prepared for low-temperature latent heat thermal energy storage by incorporating eutectic mixture of capric acid and stearic acid and gypsum wallboard. Thermal properties of form-stable PCW were measured by DSC analysis. The form-stable PCW has good thermal reliability with respect to the changes in its thermal properties after accelerated thermal cycling.