Posts Tagged ‘alternative energy’
Bio-Fuels: The Fuel Of The Future
Biomass burning has an overall impact on the atmospheric chemistry as well as the climate. When there is a fire in the savannas, or tropical forests, or like the recent California fire, large quantities of particulate matter and trace gases are released.
Biomass fuel is also known as Bio-fuel. Bio-fuel is defined as liquid, solid or gaseous fuel that consists of biomass. Biomass fuels can be used for generating power and also for heating purposes.
Biomass fuels can help greatly in reducing the various greenhouse gas emissions and at the same time can increase energy security by being an alternative to fossil fuels. Today, you will find expansion of bio-fuel industries in Asia, Europe, and America.
Bio-fuels are most commonly used in automotive transport like the E10 fuel. They can easily be produced from any source containing carbon like plants. Biomass is mostly derived from living organisms, which includes animals, plants, and their by-products. Manure, crop residues and garden waste are some of the different sources of biomass. This is a renewable energy source that is associated to the carbon cycle as compared to various natural resources like coal, petroleum, and nuclear energy.
Some of the most popular agricultural products that are grown for the purpose of creating Bio-fuel in the United States are soybeans and corn while Europe uses wheat, rapeseed and sugar beet; sugar cane is grown in Brazil, Jatropha in India and palm oil in South-East Asia.
In the early part of 2007, Diversified Energy Corporation with the help of North Carolina State University (NCSU) geared itself for a breakthrough in biofuel technology, which has been named Centia. Centia has been positioned for producing military and commercial jet fuel and can even act as a biodiesel additive in cold or freezing weather. The process of developing Centia looks promising and is expected to deliver a high energy efficiency level that can be in excess of 85%.
There are a wide variety of scientific experiments being conducted, globally, to produce a viable bio-fuel that will be efficient and environmentally friendly. Scientists have started to look beyond the bio-fuels and started to work on the various byproducts of bio-fuel that can be used and even consumed as food in our daily lives.
Considered as an integral part of the green revolution, bio-fuels offer quite a few advantages over other fossil fuels like coal and petroleum. Bio fuels have the ability to recycle carbon dioxide with every growing season by getting it from the air to convert it into biomass. So unlike coal, which upon burning releases carbon, biomass in a way traps all the carbon that is in the air. This is an important aspect from the point of view of global warming because it doesn’t release any carbon components into the air. The biggest advantage over conventional fuel is that bio-fuel is renewable and hence they will not deplete the limited natural resources of our planet.
Common Biomass Fuels
Here is a list of some of the most common first generation Biomass fuels:
Vegetable oil
Vegetable oil is used for cooking food and also as a fuel. Vegetable oil is not high quality oil for fuel use but it is still used in older diesel engines, which are equipped with an indirect injection system.
In most of the cases, vegetable oil is used for manufacturing bio-diesel that is compatible with most of the diesel engines. It is normally blended with conventional diesel fuel for optimum efficiency.
Bio-diesel
Bio-diesel is one of the most common Bio-fuels in Europe. It is produced mainly from fats or oils using the process of trans-esterification. It is a liquid that has a similar composition like that of mineral diesel. The chemical name for bio-diesel is fatty acid methyl ester (FAME).
The oil is mixed with methanol or ethanol and sodium hydroxide, which initiates a chemical reaction to produce glycerol and bio-diesel (FAME). The process produces 1 part of glycerol per 10 parts of bio-diesel.
Bio-diesel is extensively used in diesel engines after it is blended with mineral diesel. Some countries like Germany have manufacturers Volkswagen, who provide a cover on their diesel engines as a part of their warranty for 100% bio-diesel use.
A majority of vehicle manufacturers still limit to use of 15% bio-diesel blended with mineral diesel. In some of the European countries, 5% bio-diesel blend is widely used and even available at gas stations
Bio-ethanol
Ethanol is one of the most common Bio-fuels across the world. It is also known as an alcohol fuel and is produced by fermenting sugars, which are derived from corn, wheat, sugar cane and sugar beet. The various production methods for ethanol are fermentation of the sugars, enzymatic digestion, distillation and drying.
The use of Ethanol has been widely seen in petrol engines where it replaces gasoline. Almost all the petrol engines in the world can run on 15% blends of bio-ethanol with gasoline.
With an eye on the diminishing natural resources, its time for us to usher in the bio-fuel era!
An Overview of Wind as an Energy Source
Wind is one of the cleanest, if not cleanest, renewable energy sources available to us. What most people don’t know is it is also the fastest growing energy sector.
Wind is an indirect version of solar power. Different surfaces on the Earth react differently to being hit by sunlight, particular in regards to heat. As sunlight heats up surfaces, they warm up at different rates. The surround air also warms up at different rates, fertilizing the wind process. Temperatures over a body of water like a lake will always be cooler than temperatures over rocky ground. Hot air rises and cool air rushes into fill such voids. As this process occurs, the rushing air manifests as wind and an incredibly cheap and clean energy source.
The fact that wind is a naturally occurring event makes it a great energy source. Consider the following:
1. Wind is a renewable energy source because it will exist as long as sunlight beats down on us.
2. Wind has been used by man as an energy source ever since we’ve sailed boats.
3. The first windmills were used to turn wheels to grind grain in Iran.
4. American colonist used windmills to move water, grind grain and cut wood.
5. Wind energy harnessed by windmills was a dominant source of energy in rural America in the 1920s.
6. In modern times, California is the biggest user of wind power and produces twice as much electricity as any other state.
7. Modern windmills actually come in two forms, vertical and horizontal models.
8. Horizontal windmills are the stereotypical version that comes to your mind when the word is mentioned.
9. Vertical mills look like upside down egg beaters, but are hypnotic when they spin.
10. Unlike traditional utilities, most energy produced by wind is done by private businesses and sold to utilities through an electric grid hookup.
11. Wind power in the U.S. generates a whopping 17 billion kilowatts per year, more than enough to provide all electrical needs for the city of Chicago.
12. More than 30 states have wind farms generating and supplying electricity to utility companies.
13. California, Texas, Minnesota, Iowa, and Wyoming are the dominant forces in producing energy from wind.
14. The biggest energy producer from wind is Germany, which is also dominant in solar power production.
For many, these wind findings will be a surprise. The sole fact that there is enough power produced by wind energy to handle a city the size of Chicago is pretty impressive. As we move into the 21st century, new technology is heading in the direction of creating wind energy platforms for individual residences.