Monthly Archives: November 2014

Green City Times

Top 5 greenest cities in the world

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A Canadian city that is striving to be the greenest city on earth, consistently ranking as one of the most livable cities on the planet…

A European city that averages between 2-5 inches of rainfall each month, has rain year-round and temperatures between 30-50° F for at least half of the year, however is still considered Europe’s “solar city”….

An American city that leads the nation in recycling, and is planning on having a 75% recycling rate for all of the city’s reusable waste by 2015…

The city whose metropolitan population is among the largest in the world, yet still maintains almost 40% of its area as either green space or water (a sustainable metropolis)

A couple of European cities that make use of their tremendous natural resources to provide a supply of renewable energy for most of their heating and electricity demands. This energy is sourced from the natural environments of: volcanoesgeysers and forest

A South American city that serves as one of the world’s premier examples of urban planning and boasts the finest bus system in the world….

offshore wind

Renewable energy – breakthroughs in wind energy

Breakthroughs in wind technology have everything from lasers pinpointing the direction of the wind, so that turbine blades can optimize their productive capacity by automatically adjusting their position, to advancements in blade design that increase flow and decrease drag. 2014 saw the increased use of strong, light corrosion resistant composite materials for tower and foundation structures. In addition, the latest trends in global wind turbine  technology include augmenting wind power with energy storage, integrating smart grid technology into turbine operation and moving wind farms offshore.

Recent breakthroughs in wind turbine technology drive down the costs of building wind farms and help to put this renewable energy technology on a stronger economic footing to compete with coal and natural gas. Two types of technologies in particular address storage and intermittency concerns, factors which have held wind back from achieving grid parity with fossil fuels until 2013-2014. An industrial smart system sends data to operators, predicting wind strength and optimal position for turbines based on the forecasted wind speed and direction. In addition, renewable energy storage technologies store excess electricity when more energy is produced by the wind than what is needed, and feeds it back into the grid when the wind slows down, or stops blowing.


As of 2014, the number of countries with more than 1 GW of installed capacity for wind energy…


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Ivanpah Solar Electric Generating System (ISEGS)

Renewable energy: solar and solar thermal (PV and CSP)

Recently, there have been dramatic breakthroughs in solar energy that will help further the mainstream use of photovoltaic (PV) technology, bringing solar closer to cost parity with fossil fuels as a viable energy source to power the grid. A key development that will enable the widespread use of solar is the production of cells using less expensive, and readily available materials. Silicon has traditionally been the preferred material for PV, however cadmium telluride, copper and selenium (among other materials) are now also used to produce PV cells. These materials are used to produce highly efficient, low cost cells.

Nano PV cells result in much more compact, thinner, more efficient solar units. Nano technologies in PV with from 4 to 7 times (or more) the efficiency of standard photovoltaic cells are in the R&D phase today, with limited commercial availability. There are nano and alternative material PV cells with substantially higher efficiency than the standard (double to triple the standard 12-15% efficiency) in use today. The solar arrays now being produced could be exponentially improved with the development, refinement and implementation of nano technology. 

In addition to advancements in traditional photovoltaic technology, there have been exponential advancements in the field of solar thermal energy. Instead of simply converting energy from the sun into electricity, with solar thermal technology, solar energy heats water, molten salt, or another working fluid, and then steam is used to drive generators. Solar thermal represents an advancement in solar energy with 4 to 5 times the power density of PV. However, reductions in the cost of this technology have been difficult to realize, preventing it from really taking off.

One commercially successful application of solar power is the solar powered water heater. Solar powered water heaters are mandatory in new construction in the entire country of Israel, and now, in the state of Hawaii. Some of the other applications of solar energy include power generation and heating even in remotely situated buildings, in industrial buildings, schools, hospitals, etc…

Both types of solar energy (PV and solar thermal) will continue to steadily lessen in cost as technological advancements are made. However, photovoltaic is projected to remain ahead of thermal in terms of cost of production and utilization. Solar thermal does have a couple of advantages which compensate for the higher cost. Solar thermal energy is produced consistently throughout the day, not relying on weather conditions. relatedThe turbine will run on natural gas if there is no sun for an extended period of time. Solar thermal units fit easily with power storage systems and will continue to produce energy at night, using energy harnessed during the day.


The most promising new technologies in the world of solar power are CSP and HCPV…

Please see: for the whole article.


Related links on solar energy:



Ivanpah Solar Electric Generating System (ISEGS)

Ivanpah Solar Electric Generating System (ISEGS)

Jointly owned by NRG Energy, Google, and BrightSource Energy, the Ivanpah Solar Electric Generating System (ISEGS) sprawls across the California and Nevada border in the Mojave Desert. This 377 to 400 megawatt solar complex is revolutionizing the solar energy industry, proving that large scale renewable energy projects are not only possible, but can both thrive and surpass expectations. With just three plants, the ISEGS produces enough clean, renewable electricity to power 140,000 homes during peak hours, and double that amount during off hours. In fact, ISEGS produces double the amount of commercial solar thermal energy than any other plant in the United States.

ISEGS officially broke ground on October 27, 2010 and opened for business in February of 2014. Despite being one large complex, the project was actually broken down into three separate plants, each with their own 400-plus foot tower affixed with water filled receivers / boilers. The specific technology used is known as Luz Power Tower 550, which was developed by BrightSource Energy with the goal of creating a unique take on traditional energy generation that harnessed and increased the power of the sun. Stretching across 3,500 acres, each plant relies on solar receivers filled with water nestled atop the towers. By using 300,000 mirrors, known as heliostats, to increase the sun’s energy and reflect the light directly onto the solar receivers at strategic angles, the water in the receivers is heated to such high temperatures that it dissolves into steam…

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Vancouver - Greenest City 2020

Vancouver – Greenest City 2020

Vancouver is attempting to become the world’s greenest city by 2020. In order to achieve this, the city formed GCAT (Greenest City Action Team) from their city staff. The goals for GCAT are:


·       by 2020, create 20,000 new green jobs and become a center for green business

·       by 2020, reduce carbon emissions by 33% compared to 2007, and become a leading city in fighting climate change

·        by 2020, increase the use of renewable energy, and reduce the demand for energy (over 90% of the city’s energy already is r.e., mostly hydroelectricity)

·        by 2020, all new industrial/ municipal construction to be carbon-neutral, improve efficiency of existing buildings by 20%

·        by 2020, over 50% of commutes by walking, biking or public transport

·        by 2020, reduce waste heading to landfills or incinerator by 40%

·       by 2020, plant an additional 150,000 trees so every resident lives within 5 minutes of a beach, park, greenbelt or other open space

·        by 2020, reduce per-capita ecological footprint by 33%

·        by 2020, beat WHO’s (World Health Organization) drinking water standards

·        by 2020, beat WHO’s clean air standards

·        by 2020, reduce carbon footprint of food production by 33% – focus on organic, local food production

·        Wind and solar farms also are energy sources to be used in the plan – through clean energy, greenhouse gas emissions will be reduced by 1/3 by 2020

The priorities for implementing what are termed as “quick start actions” (initial actions to ensure Vancouver reaches the “greenest city” goal) are to reduce fossil fuel dependency and to create green jobs. Vancouver’s greenhouse gas emission targets are to get to 33% below 2007 by 2020 and 80% below 1990 by 2050. GCAT has begun to create their Green Economic Development Strategy (GEDS), implement a green jobs pilot project and begun to seek funding from the federal government and provincial governments for the new green economy…



Please see for the whole article.

Vauban's solar ship

Europe’s greenest city district

Vauban, Germany is a sustainable town for every other city in the world to emulate. Vauban is a “zero-emission” district in Freiburg, Germany.

The town is not completely carbon neutral, as cars are actually allowed, if you pay at least $23,000 USD for a parking spot on the outskirts of town. Thus, the majority of residents don’t own a car, choosing instead to use the tram, cycle or simply walk. Most streets don’t even have parking spaces.

The radical culture of Vauban has roots in its dramatic history. Ironically, Vauban was a military town through WWII and into the early 90’s. When the military left, the vacant buildings were inhabited by squatters. These vagabonds eventually organized Forum Vauban, organizing a revolutionary eco-community. Today, Vauban is modern, beautiful and represents the very cutting edge of sustainable living.

Careful urban planning helped to create a city layout which lends itself to cycling as the primary mode of transit. The terms “filtered permeability” and ”fused grid” refer to a plan that ultimately means connected streets throughout the town, as well as plenty of pedestrian and bike paths. Residents primarily live in co-op buildings, such as the “solar ship”, a large area of co-op buildings that run strictly on renewable energy…