Archive for the ‘Energy’ category

From Nuisance Weed to Biofuel Crop

February 1st, 2012

Field pennycress, also known as french weed, is an invasive plant found alongside many of our roads. According to researchers, it could be a good source of biofuel. Scientists have found that the plant yields copious amounts of seeds whose oil can be used for biofuel production and even as a biological herbicide.

It can be an organic bioherbicide due to its high concentration of glucosinolates, which can be used for suppressing a variety of weeds, such as white cockle, dandelion or redroot pigweed. However, the amount of meal necessary for effective weed control is very high, so the plant has more potential for use in horticultural crops.

Pennycress belongs to the Brassicaceae family, of which other oil-rich plants, such as canola and mustard, are also a part. The oil content of a pennycress seed ranges from 26 to 40 per cent; the oil is also suitable for low temperature lubrication. In order to produce bio-diesel and glycerol, pennycress has to be treated with acid and alcohol in the initial stages of production. Once refined, the biodiesel has the potential to be used as a commercial commodity.

However, further research is needed in order for scientists to be sure that this sort of biodiesel can meet industry standards. The biodiesel has to be of sufficient quality to be used in today’s engines. All diesel-based oil starts to gel when the air is cold enough, so the cloud point, the temperature at which crystals become visible in the fuel, is vital for the production of biodiesel.

Researchers have also found that pennycress biofuel is better for cold rather than hot climates, and better than using soybean oil-derived biodiesel as it produces twice the oil per acre than soybeans. Another advantage is that pennycress does not compete with farmers’ summer soybean production because the plant can be grown in winter and harvested in late spring. Pennycress production also absorbs CO2, a harmful greenhouse gas, and can be grown on any type of wasteland, unlike most biodiesel feedstocks that require fertile soil.

As with everything, there is also a negative side to using an invasive plant for biofuel. In the USA and many European countries, pennycress has a largely negative impact on the ecology and economy. It obstructs river systems, ruins wildlife and livestock habitats, limits access for irrigation, and reduces water quality and quantity. But luckily, if approached in the right way, the weeds can be used for something positive.

(Post by Ivelina Dineva)

(Image by Andrew Curtis [CC-BY-SA-2.0], via Wikimedia Commons)

5 Nonfood Biofuel Crops to Power your Car

January 30th, 2012

The next big thing on the horizon for sustainable fuel is nonfood biofuel crops, which do not create competition between food and fuel. Inedible and invasive weeds seem to be on top of the list due to their low demand for water, pesticides, herbicides and rich soil. Weeds can also grow in contaminated soil, which allows them to absorb and clean pollutants through the process of phytoremediation.

However, there is still some resistance to using weeds as biofuel due to the risk of invasive species taking over native species and destroying the surrounding eco-system. But surely with a well-dedicated team of workers and good management these renewable pests can be kept under control. Below is a list of the five most desirable and fuel-efficient weeds.

1. Arundodonax

This plant grows almost three inches per day in various soil and climatic conditions. It is one of the strongest candidates as a renewable energy source because it is the most productive, has the lowest impact of all energy biomass crops, and it can grow for 20 to 25 years without having to be replanted.

2. Amaranthus

Also known as pigweed amongst farmers, this plant has all the makings for a biofuel crop. Its drought tolerance, fast photosynthesis rate, and resistance to disease and pests have gained it a lot of attention from researchers at the University of New Mexico.

3. Kudzu

This vicious plant can grow more than 6.5 feet a week and absorbs any trees and bushes in its way. Its high-carb content can be converted to ethanol using a yeast-based process. Kudzu will only be worth harvesting if it is economically viable and easy to access, as most of it grows on steep hillsides.

4. Pennycress

Pennycress is one of the strongest weeds and is an enormous threat to the eco-systems around it. But, it is also extremely efficient and can grow in nickel-contaminated soil that most plants would not be able to survive in. Researchers are working on developing Pennycress as a biofuel in Peoria, Illinois.

5. Jatropha

Jatrophacurcas is also a strong candidate for future biodiesel production. Crushed Jatropha seeds produce Jatropha oil that can be processed to produce high-quality biodiesel. Even the residue can be processed and used as biomass feedstock to power electricity plants. However, the long-term environmental effects of large-scale use are unknown.

(This is a post by Ivelina Dineva)

(Image by ceridwen [CC-BY-SA-2.0], via Wikimedia Commons)

Why we need to change

January 27th, 2012

Greenpeace recently commissioned a survey to determine the true cost of coal to South Africa. The survey, done by the University of Pretoria’s Business Enterprises unit, delivered truly shocking results.

More than 90% of the electricity in South Africa is generated by coal powered stations, and Eskom isn’t planning on changing that any time soon. Eskom is currently building two more coal powered stations, Kusile and Medupi, which, on completion will be among the largest in the world. The budget to build these new stations is R385 billion and each will have a life span of 50 years! Even worse is the fact that Kusile will produce up to 37 million tons of carbon dioxide every year.

This has led to South Africa becoming one of the biggest polluters in the world. South Africa is the fifth highest producer of coal, and the sixth highest user in the world.

The other side of the spectrum is even worse. Only 2 GWh (Gigawatt) of South Africa’s 237 000 Gwh is produced from wind power. The fact that they are currently building these two massive stations has also meant that there is no funding  available for the development of renewable energy sources .Eskom is lax in it’s efforts to build more solar and wind powered stations, and that needs to change!

The South African government wants to create 111 000 new jobs in the current energy industry, but this study has found that 149 000 new jobs can be created, if government invested in the renewable energy sector.

Greenpeace also recently published a different report entitled ‘The Advanced Energy [R]evolution: A sustainable energy outlook for South Africa’, in which it outlines key aspects of the renewable energy sector. They state that if government gradually phased out coal power, and invested in sun and wind power, half of South Africa’s energy could come from renewable sources by 2030, thus eliminating the need to build the Kusile power station.

Eskom argues that these stations are necessary in order to provide electricity to the nearly 10 million people living without it, but this is not true. It would take much less time and money to build renewable electricity stations close to areas that need it most, and so doing, be able to provide 10 million people with safe, renewable energy.

The easiest way to petition against the building of these coal stations is at http://www.greenpeace.org/africa/en/use-me-more/ . Here you can sign up to the Greenpeace petition to get government to better utilize sun and wind power.

It is up to you to make the change. So sign up, and help protect our beautiful planet.

(This is a post by our intern Kristian Meijer)

(Image by Senor Codo, CC by-SA 2.0, via Flickr)

How to make 2012 your greenest year yet

January 24th, 2012

Governments hold climate talks, yet make no real promises to commit to anything. It is up to you to change things for the better, to ensure a greener and healthier environment for future generations.

Here are a few ways you can do that:

1.     Recycling

The simple act of recycling your trash is one of the single most effective things you can do to reduce your carbon footprint. All you need to do is to sort your trash into different categories, namely paper, plastic, tin and glass. Don’t throw away any food items. Create your own compost heap at home and throw any garden waste and food items on it. Hey, it’s free garden fertilizer.

The city of Cape Town has 20 recycling centres across the city. You can drop off any recyclable material at any of the places listed on their website: http://www.capetown.gov.za/en/solidwaste/Pages/ReduceReuseRecycle.aspx

2.     Turn off all lights and electronics

Turning off your lights when not using them will not only help reduce your carbon footprint, but will also save you a bunch of money. The easiest way to do this is to switch off the light as soon as you leave the room and back on only when you need it.

Make sure you switch on electronic equipment only when you are using it, even energy efficient electronics use quite a lot of power. And all electronics still use power in standby mode.

Remember to turn off your TV and lights when going to bed; you will be surprised at how much more peacefully you sleep.

3.     Switch to CFL bulbs

They may be a bit more expensive than ordinary bulbs, but they will save you a lot of money in the long run. Firstly, they use less power, so your electricity bill will lessen. Secondly, they last longer, so you don’t need to replace them as often. Some CFL (Compact Fluorescent Light) bulbs even have a day-night sensor, so it switches itself on when you need it. Clever, hey!

4.     Don’t use what you don’t need

Some of the biggest users of electricity in your home are the stuff you don’t really need.  The biggest one is your tumble dryer. One cycle of your tumble dryer can use as much as 5000 watts of power. So, as an alternative, hang your clothes on a clothesline. Trust me, you’ll be thankful for how much you save.

5.     Car pool

Travelling between work and back every day causes massive amounts of carbon dioxide to be released into the air every day. You can help reduce your carbon footprint by travelling to work and back with a colleague. This will cut your fuel costs in half and help save the environment.

Please remember, it’s the little things you do that make the biggest difference. So go out and help save our most beautiful planet.

(This a post by our intern Kristian Meijer)

(Image by lydiashiningbrightly, CC by 2.0, via Flickr)

How to create a low energy house

November 17th, 2011

There are several major considerations to keep the use of energy in your house as low as possible.

Age of Property

Radical changes are taking place in the way modern buildings are designed and constructed to provide thermal comfort, healthy living and reduce environmental impact and long term fuel costs for the future.

Until a couple of decades ago, houses were not build with the same regard to energy conservation and open plan designs; large single glazed windows, tall ceilings, draughty chimneys and poorly fitted  doors and windows are all vulnerable areas when it comes to heat conservation. Solid masonry walls and un-insulated roof spaces allow heat to escape through the fabric of the building to the outside.

Insulation

The most important principle in energy conservation is good insulation. New homes now feature high specifications of insulation throughout the whole building but there are steps everyone can take to ensure their home wastes as little energy as possible.

Loft and rafter insulation is as crucial as keeping a hat on your head in cold weather. It is easy to spot the poorly insulated houses in snowy weather. They are the ones with no snow on the roofs as the heat from the house has escaped upwards. Modern specifications recommend much greater thicknesses of insulating materials and it is possible to easily and cheaply supplement existing insulation. Glass wool and rock wool insulation are the most commonly used materials for lofts. They are easy to place on and around rafters. In some cases can be installed with the help of a government grant.

Don’t forget that if your garage is attached to your house it can also have an impact on energy savings. Installing well fitted insulated garage doors has an effect on heat conservation both to the garage and adjoining rooms. This mitigates the rush of cold air as you open and close connecting doors to your house. High quality sectional garage doors have 42 mm thick insulation with weather seals around the sides and bottom which makes a noticeable difference. Also any rooms above a garage fitted with an insulated garage door benefit from heat transference.

Cavity wall insulation is also essential to conserve the ambient heat inside the house. A specialist company will survey your property, usually free of charge, to assess what improvements you can make.

Eliminate Air Leakage And Draughts

It goes without saying that eliminating draughts through any windows, doors and chimney’s is essential to retain heat, improve thermal comfort and cut down running costs.

Life style changes

Don’t overlook making the savings that making simple lifestyle changes can have on your energy bills. Lowering your thermostats, wearing thicker clothing, closing curtains at night, keeping doors closed and turning to renewable energy sources such as solar power, solar heating, and wind turbines all contribute to keeping your hard earned money in your pocket and not in the hands of power companies.

 

Author Bio

This article has been written by Dan who often writes about green products for the home such as insulated roller garage doors.

(Image by boogy_man, stock.xchng)

Proposed wind farms cause controversy in the Eastern Cape

August 16th, 2011

As far as alternative energy goes, South Africa is lagging. Not only do we not have concrete policies, but our government does no more than pay lip service to the increasingly pressing need to complement our dwindling Eskom supplied energy with the renewable kind. The mission is not helped by certain citizens who object most vociferously to renewable energy projects on the grounds that they don’t look pretty.

Relatively recently, a company called Red Cap, which is dedicated to building up South Africa’s wind power generation, got the go-ahead for its Kouga Wind Farm project. The long-term project will see the creation of 120-odd wind turbines in three clusters in the Eastern Cape: Oyster Bay, north of the Kromme River and bordering the Tsitsikamma, River.

Red Cap’s website boasts testimonials from landowners in the area, praising the project to the heavens:

“We have a crisis situation and we need more electricity, wind can provide that electricity. A project such as this (Red Cap wind farm) in the Kouga region can mean a lot for development in many ways, especially job creation…” Roy Seeney – Welgelen Dairy Trust

“… My father used to say progress is like cycling on a bicycle – if you stop pedalling, you will stop moving.  We need to move towards better means of obtaining electricity as the country needs more energy not just for today but for the future.” Harley Knott – Rag Apple Farming Prop Ltd

“Green energy is the next best thing; it is good for our country. We cannot run away from the fact that we have a crisis with our electricity supply and we need reliable sources of electricity. As a way of preserving our environment, let us use what is freely available to us and that is wind.” Johan Strydom – Welgelee

But, not everyone is happy. In fact, the people of St Francis are distinctly unhappy.

On 7 July, Mark Tanton, Managing Director of Red Cap, met with community members at the St Francis Bowling Club. His intention was to address the community’s concerns and answer some pressing questions. The community said it was a brilliant PR job that left them more frustrated than before.

According to an article on the CACADU District Municipality website, Tanton took pains to assure the community that the project would not have any impact on the untouched land that attracts thousands of tourists every year. He also said that the intention was not to encroach on residential areas. He tried to emphasise the advantages, such as the growth of local industries and income for impoverished settlements in the area. He mentioned that taller wind turbines would be used so that fewer wind turbines would be used, which would have less of an impact on the farming industry and be less of an eyesore.

Homeowners aren’t having any of it though. They don’t believe that they can be an energy hub as well as a tourist hub. They believe the two are mutually exclusive. One particularly outspoken St Francis resident, Bridget Elton, said that the cumulative effect of the project would be devastating. Her biggest objections appear to centre on the impeded view. Another concern is the effect on property values, which, according to another resident, Andre Fouche, have already gone down.

The St Francis Chronicle cites further grievances, which include a violation of the “sense of place”, the lack of a “human element” in the decision making, and, of course, changes to lifestyle. Yet another resident, John Hammond, was quoted as saying, “There’s nothing wrong with financial gain but do it in a way that does not affect the lifestyle of thousands of people.” As if thousands more wouldn’t benefit from it.

The transport of the bits and pieces of the turbines is another worry, because it will impact the roads, commuting and deter tourists.

It all seems rather petty.

One can understand how residents would prefer to maintain the beauty of their neighbourhoods. One can also understand how a community would want to protect its reputation as a tourist “hub”. But is it right to stop the development of a project which would, despite what the naysayers allege, have enormous benefits not only for said community but much further afield?

Once more we look at comments from a resident, Sandra Hardie. Red Cap has promised that 25% of the income generated by the project will go to disadvantaged communities. Hardie claims that the promised 25% would be unlikely to materialise for a number of years. The implication being that it would still materialise. But the townspeople are still willing to deprive these already deprived communities of that.

The only really salient allegation is the one that claims a wind farm consortium will charge Eskom three times the current rate of electricity for all energy generated. These costs would be passed on to consumers.

Where does the greater good lie?

What do you think?

 

(Image by Harvey McDaniel from Naalehu, HI (South Point_Wind Farm 5_Aug_1_02) [CC-BY-2.0], via Wikimedia Commons)

 

 

Cape Town’s green energy supplier: 3rd Rock Energy

March 23rd, 2011

Cape Town is becoming a greener city with the Meatless Monday campaign and Green Map, both of which are designed to promote eco-friendliness among local residents. The city now also has its own green energy supplier called 3rd Rock Energy, a company which has involved itself in a number of eco-issues throughout South Africa.

3rd Rock Energy is based in Noordhoek, Cape Town and focuses on supplying individuals and companies with sustainable and renewable energy. The official site reports that sustainability is the capacity to endure, and points out that it is the potential means of achieving long-term wellbeing for the natural world and its human population.

The cleanest forms of energy can be found in wind and solar power. They are also two of the most readily available means of energy the world knows. According to 3rd Rock Energy the earth receives more solar energy than humans can use in a year. So how can this green company help others to achieve a green business or lifestyle?

The Facebook page states that they’ll help customers achieve eco-friendliness by offering good-quality products, professional installation and helpful after-sales services to ensure that every energy requirement is met. If you’re considering a change from normal energy consumption to that of the environmentally-friendly variety there are a number of options available to you.

Light Emitting Diodes (LED lights) are an efficient modern-day lighting choice. They use less wattage to run and can last up to seven years. You will have to replace incandescent bulbs up to three times over a period of six years, but if you get LEDs you’ll only have to replace them once every seven years and they use much less energy to emit the same amount of light.

Solar power is possible by using the sun’s energy and converting it into electrical or thermal energy. You can harness it by installing solar panels on your rooftop or by investing in a solar geyser. You can use solar energy to power your electrics, and the energy can also be used to heat up your geyser water. It’s a great way to ensure your energy usage isn’t too harmful to the planet.

Wind power is, according to 3rd Rock Energy, the cleanest form of energy. Wind turbines work by converting the force of the wind into clean electricity. There are small turbines available for domestic settings but are useful for light loads only. On a larger scale a wind farm can produce enough energy to be introduced back into the electricity grid.

3rd Rock Energy can supply you with all the products needed for either setup whether it involves a simple LED bulb or a complicated wind farm installation. If you’re interested in finding out more email the company on info@3rdrockenergy.co.za for more information.

Image via Stock.xchng.

The crazy things we do to be “green”

February 23rd, 2011

Being green is a mindset and a lifestyle that some people embrace and some just don’t get. There are small and big ways to ensure that your presence on the earth is less impactful, for example, whenever I go to McDonald’s I fill only one plastic tub with tomato sauce and if I need more I’ll go refill the same container. It may seem like a small gesture but it’s an effort that not many people would consider while wolfing down their Mac-meal.

In an age where recycling has become the responsibility of major corporations and eco-friendliness is admired there are all kinds of ways for people to combat greenhouse gases, carbon footprints and pollution. But just how far would you go to save the planet we live on?

Kristina Chew of Care2 recently reported on a bizarre case of saving electricity in a UK town called Redditch in Worcestershire. The town has apparently proposed an altogether disturbing way to save around $22 000 a year by heating its Abbey Stadium sports centre and swimming pool. There is a crematorium nearby the sports facility and in order to save costs on electricity bills and to set a precedent by reducing its carbon footprint, Redditch proposes to use the heat from the former facility.

Personally the idea of swimming in a pool, or using a facility that uses heat from such an unusual source is both intriguing and repulsive. In the name of being green I can accept that this project is an innovative way for the operation to reduce its energy usage, but the idea of that heat coming from burning human bodies? I guess anything goes in the fight to saving our world.

Understandably it’s not clear how people would actually feel about the project. Simon Thomas, a funeral director at Thomas Brothers funeral parlour, told The Guardian: “I don’t know how comfortable people would feel about the swimming pool being heated due to the death of a loved one, I think it’s a bit strange and eerie.”

But there are those who have stated that the use of the energy is a much better arrangement than letting it go to waste. And if you come to think about it, there’s no way that the use of the energy will be in any way unhealthy or disrespectful; it’s just hot air. I wonder what Captain Planet might think about this proposal?

Bleeding clean energy: a city for keeps?

February 9th, 2011

Just outside of the opulent city of Dubai lies a community that almost defies everything the consumerist metropolis stands for. The city of Masdar is entirely unique; a totally green centre that will seemingly attract every eco-friendly energy researcher and companies with a conscience.

Brian Merchant of TreeHugger.com believes it’s an acceptable metaphor for clean energy: “full of potential, only a fraction realised, continually delayed, undeniably exciting – - and nobody’s quite sure how seriously anyone else is taking it.”

It’s true that individuals remain perplexed as to how to approach the subject of “green living”, “eco-friendly” and “carbon free”. It is a lifestyle that demands constant work, attention and money, things that the average person doesn’t happily want to spend on a cause that will not instantly benefit them.

This “carbon-neutral oasis”, as Merchant describes it, is a good example. While the intention behind it may be beneficial to the world’s understanding of clean energy the whole idea still seems pretty elitist. Only people with money can buy electric vehicles (EVs) and install charging stations, only people with money can buy solar panels to light up their houses and only people with money could possible develop the idea and construction of an entirely carbon neutral city.

The city itself is phenomenal; it is a high-tech society bent on propelling Abu Dhabi as a forerunner in the race to become the “pre-eminent source of renewable energy knowledge, development, implementation,” and to become the “world’s benchmark for sustainable development”. It’s also pulling out all the stops. Masdar Power focuses its attention on Concentrating Solar Power (CSP), wind power and photovoltaic solar energy (I had never heard of such a thing).

Masdar looks like a city out of a sci-fi film; the extensive structures, the board upon board of solar panels, the interesting architectural design. And it’s not a place for your average person (or so it seems); while the Masdar website states that it is pedestrian-friendly, there appears to be a strong indication that the city is actually for individuals and corporations that are strongly involved in the further development or implementation of clean-technology. Currently it is home to less than two hundred people.

I love the idea of a community living and working towards a clean energy, low impact lifestyle, but that’s one of the pitfalls of Masdar. The real challenge is to integrate clean living into the world’s already existing lifestyles. It doesn’t really help to create an exclusive society removed from the rest of the world in an attempt to solve the world’s energy issues.

The elimination of carbon emissions: is it all just hot gas?

February 7th, 2011

We’ve definitely got a problem; we consume so much fuel in pretty much all aspects of our lives that the carbon emissions levels are dangerously high. The only possible answer to this pollutant is for us to revert back to living in caves, cooking over an open fire, right? Well, according to UK-based company, Cella Energy; wrong.

Apparently Cell Energy’s scientists have been working on the development of a synthetic form of fuel thay may have a significant affect on the world’s gas consumption. The project has been going for four years, and CEO Stephen Voller now believes the fuel is ready to be revealed.

Imagine driving around in a completely emissions-free car, or not having to worry whether the products you buy have used gallons of fuel to get to you. Voller recently spoke to Gizmag: “We have developed new micro-beads that can be used in an existing gasoline or petrol vehicle to replace oil-based fuels”. He continued by explaining that, surprisingly, the beads can be used in existing vehicles without modifications.

The fuel is hydrogen-based and, according to Cella Energy, it doesn’t produce carbon emissions when used. If the wonder-fuel is as clean and impressive as it sounds it will mean that people around the world can stop worrying about the environmental effects of driving around in their cars. It will also mean that dipping and peaking oil prices will no longer matter.

Currently it’s expensive to embark on a “green” lifestyle; electric vehicles (EVs) and charging stations cost a pretty penny to buy and install. But the fuel, which is being hailed on the Cella Energy website as “New Oil” or “Oil 2.0”, could be the cost-effective answer.

But as TrendHunter reported: “It almost sounds to good to be true”. Storage of the element has been user-unfriendly causing hydrogen to be a fairytale fuel option. When burned it produces pure water, so would be the perfect solution to all the pollution currently being pumped into our atmosphere by cars, but everyday people don’t know how to manage the element.

According to the lead scientist heading the project for the UK’s Science and Technology Facilities Council, Professor Stephen Bennington, this will no longer be a problem. They have developed a new storage technique that should see the element become a more viable option.

Guess we’ll have to wait and see; who knows, if it’s taken four years to develop the method, perhaps it may take another four to get the project into the real world.