Monday, May 18, 2009

Working of wind power systems

Wind always blows on the surface of the earth. This makes wind an inexhaustible, clean and renewable energy source. The most common method of harnessing renewable wind energy is using wind turbines that can generate wind renewable power. The components of wind power systems are wind turbine, a tower, wires and connectors and inverters or batteries.

The main components of wind turbines are a rotor, a generator and a tail. The rotor has two or three blades that move after gaining renewable wind energy. The rotating blades then turn on a generator which converts the renewable wind energy to electrical energy that can be used for several purposes. The tail of wind power systems ensures that the turbines can capture maximum wind renewable energy and can generate the maximum amount of electricity possible. Generally, the wind turbines are installed at heights so that they can capture maximum wind renewable energy to generate massive amounts of electricity.

The different types of towers used in wind power systems are free standing and guyed towers. Guyed towers are the least expensive towers that are available. They have a simple framework tat consists of metal strips supported by guy cables and earth anchors. This makes them are easy to use, repair and maintain. Free standing towers or stand alone systems are the ones that use batteries to store excess wind power generated.

Wind power systems are connected to grid connected systems. In this case, the wind renewable power is used to generate electricity. The electricity so produced can be put to several uses in wind power homes and also at commercial sites.

Wednesday, May 13, 2009

Solar power thermal plants

Renewable solar energy is used in solar power thermal plants to heat a fluid and turn it into steam. The steam gets converted to mechanical energy that is used to run a turbine. These turbines are in turn connected to generators and power them to convert the mechanical energy into electrical energy. The three types of solar power thermal plants are parabolic troughs, solar dish and solar power tower.

In a parabolic trough collector there is a linear parabolic shaped reflector that focuses the renewable solar energy onto a linear receiver that is located at the focus of the parabola. A working fluid gets heated by solar renewable energy when it passes through a number of heat exchangers. The working fluid then changes to steam that runs a conventional turbine and a generator to produce electricity. These plants are designed to operate only on green renewable energy source, the solar energy.

The solar dish uses concentrating solar collectors to focus the renewable solar energy at the focal point of the dish on which the power generation equipment is mounted. The engine of the solar dish converts the heat energy of the sun into mechanical energy to heat a fluid which passes through a turbine to power an electric generator that converts the mechanical energy into electrical energy.

A solar power tower converts the renewable solar energy into electricity by focusing all the sunlight on a heat exchanger that is mounted on the tower.

The use of solar power as a renewable alternative source of power in thermal plants is becoming very popular for electricity generation.

Tuesday, May 12, 2009

Wind Power

The use of wind renewable power has generated a large number of jobs in the last few years. This is because wind power companies require lots of people who have complete knowledge of advanced wind power technology. As a green renewable energy source, wind renewable power does not emit any particles that can cause pollution in the environment as opposed to non renewable sources of energy that emit smoke in the atmosphere. It is known as a cost effective energy source that can be easily harnessed and maintained.

Economies of scale can be achieved if one chooses wind power for fulfilling requirements of electricity. The emergence of sophisticated and innovative technology has improved the yield of wind renewable power. Conventional sources of energy can vanish any time because their reserves are depleting as there is a lot of pressure on them to meet the rising energy demands. Wind power on the other hand is a renewable energy source which is available in abundance in nature.

The use of wind renewable power must be promoted as this power is clean and eco-friendly. The wind turbines that convert renewable wind energy to electricity require less installation cost and can also be maintained at a very low cost. Wind renewable power therefore can be used as a good alternative energy source because the prices of oil are rising. The demand for wind renewable power has been increasing day by day and the wind power companies are ready to explore this source to its full potential.

Tuesday, May 5, 2009

Alternative power

Alternative power refers to electric power generated from alternative sources of energy. Alternative power is the electricity derived from solar energy, wind energy, geothermal energy, tidal energy and biomass.

The benefits of using alternative power are many. Solar power, wind power and hydro power are environment friendly. They do not emit any harmful or toxic substances into the atmosphere that could be hazardous for the health. Alternative sources of energy that are used to generate alternative power are available freely in the nature. They are renewable which means that they can be used again and again.
Alternative power is also a cost effective source of energy available. Alternative power is readily available for use and can be used for many purposes.

Though there are several advantages of using alternative power, a few limitations are also associated with it. The main limitation of using alternative power is concerned with the financial aspects. The installation of power generating systems to produce alternative power is very expensive. Usually, a lot of costs are incurred on maintaining and operating power generation systems.

However, the benefits and the amount of alternative power generated by these systems overshadow the costs. That is why alternative power is considered to be cost effective.

Alternative power is the only source of energy that has the potential to meet the energy demands of the future. Therefore, the development of alternative power as a source of energy must be carefully planned. Also, strategies must be made so that alternative power can be reliably and efficiently used as a power mechanism.

Friday, May 1, 2009

Alternative power sources

Alternative power can be obtained from alternative sources of energy. It can be put to several uses and is at present one of the most important renewable sources of energy available.

Solar power is the power generated from the energy of the sun. Solar power can be in the form of heat or light. It is the most common form of alternative power that can be put to use in everyday life. It is renewable, eco friendly and readily available.

Wind power is the power generated from wind energy by using wind machines or wind turbines. The main use of wind power is for electricity generation. Wind power is a renewable source of energy that does not emit any harmful substances in the atmosphere. However, the use of wind turbines for the generation of wind power may cause noise pollution.

Power from biomass comes from decomposition of plants and animal wastes which is a source of renewable energy. This energy is called biomass. Biomass power plants can be used to convert this biomass into useful alternative power that can be put to several uses.

Geothermal power is the power generated from geothermal energy. Geothermal energy is obtained from inside the earth. This energy in the form of hot water or steam is used to drive turbines that generate geothermal power. This source of alternative power is renewable, clean and non- polluting.

Most countries are using alternative power because it is affordable, renewable and workable.

Thursday, April 30, 2009

Why use alternative power

Alternative power is the power generated by alternative sources of energy like the sun, wind, water, tides, biomass and heat generated inside the earth. The energy obtained from alternative energy sources can be converted to several useful forms of energy like mechanical energy, chemical energy, electrical energy etc. This useful form of energy is called alternative power. The various forms of alternative power are solar power, wind power, bio diesel power, geothermal power and hydro electric power.

Energy requirements of the whole world are on the rise. Energy is required for electricity generation, space heating, transportation, preparing food and for several other purposes. Today, we depend on coal and petroleum to meet the energy demands and for the generation of electricity. However, the use of coal and petroleum is an expensive method of generating electricity. In addition, the reserves of coal and petroleum are decreasing with each passing day. There will come a time when there would not be any coal or petroleum available in the world. We, therefore, need to use alternative power.

The use of alternative power will help to preserve coal and petroleum to meet energy requirements in the future. Also, alternative power is a less expensive way of generating electricity.

Alternative power is a clean and pollution free source of energy which can be put to several uses. The best thing about alternative power is that it is generated from renewable sources of energy which will always be available and never end. Hence, alternative power will always be available for use.

Thursday, April 23, 2009

Increased use of bio diesel power

Biodiesel power is the useful form of energy produced by bio diesel. Bio diesel power finds use in many applications all around the world. The production of biodiesel power has increased by exploiting energy resources and the utilisation of cheap labour. The increased use and production of biodiesel power has solved several military, political and economic problems that have been caused by the petroleum industry. Rather than compromising on the quality of the biodiesel power supplied to meet the increasing demand, the demand can be met by wisely utilising biodiesel power as a source of energy.

Another way of meeting the increased demand of biodiesel power is by developing hybrid diesel engines that utilise another source of energy in addition to biodiesel power. The increased demand for biodiesel power can also be met by sustainable production of biodiesel power that minimises the amount of energy wasted.

Bio diesel is usually produced from vegetable oil. To fulfil the increasing needs of bio diesel power, bio diesel production from waste products and crops must be increased and given incentives. For sufficiency in biodiesel power, the production of bio diesel from algae is a good option.

For meeting the increased needs of biodiesel power, strategies must be developed and implemented to produce bio diesel power in a less expensive manner. The strategies developed must ensure that the use of biodiesel power proves beneficial to all. All nations of the world must be urged to use biodiesel power efficiently as a renewable energy source.

Wednesday, April 15, 2009

Alternative power generators

Alternative power is the power generated from alternative sources of energy. Alternative energy source are renewable, readily available and abundantly found in nature. Alternative power is generated by using alternative power generators.
Alternative power generators generate electricity from renewable sources of energy like wind, water, solar energy and biomass. The alternative power so generated can be used for providing power for domestic uses, for portable power, lighting and in communication systems.
Alternative power generators use energy from renewable sources. They do not have any adverse effects on the environment and do not cause pollution. Alternative power generators are easy to use and maintain. They are also reliable and efficient sources for generating electricity.
Alternative power generators are used with solar power panels, solar water pumps, and solar power systems. They are also used with wind turbines and wind power systems. Alternative power generators may even use biomass which is the energy obtained from decomposed wastes of plants and animals.
Wind based alternative power generators convert the kinetic energy from wind into mechanical energy. This mechanical energy rotates the blades of turbines and this movement produces electricity. Solar energy based alternative power generators use solar panels or solar cells to convert the trapped solar energy into electricity.
A problem encountered in the use of alternative power generators is the high cost of installing them. The machinery for such generators is very expensive. However, alternative power generators produce electricity that is sufficient enough to solve power problems of rural as well as urban areas across the world.

Saturday, April 11, 2009

Geothermal power technology

Geothermal energy is the renewable energy found in the interior of the earth. It is usually in the form of heat. The heat is brought to the surface through the process of thermal conduction by digging deep into the earth’s core where molten magma is found. This geothermal energy can be converted into a useful form called geothermal power. Geothermal power is being used everywhere in the world today. It can be easily generated where good geothermal reservoirs are available.

A dry steam power plant uses hot steam and a little water from geothermal reservoirs. It is the oldest technology that is available for use with geothermal power. In this, steam directly goes through a pipe into a turbine which is connected to a generator which produces electricity.

Flash steam power plants use very hot water from geothermal reservoirs. When water is pumped into the generator, it is released from pressure. A drop in the pressure causes some water to convert into steam. This steam drives a turbine to generate electricity.

A binary cycle power plant uses moderate temperature water from the geothermal reservoirs. This hot water is passed through a heat exchanger to heat a working fluid made of organic compounds in another pipe. The working fluid is converted into steam and this steam rotates a turbine to generate electricity.

Geothermal power
technologies generate massive amounts of electricity. These technologies can be operated with minimum operational and maintenance costs.

Wednesday, April 1, 2009

Alternative power sources- whether to invest in them or not

Alternative power sources existed long before the conventional sources of power like coal, fossil fuels, oil and natural gas were discovered. These sources of energy are being currently used to meet almost ninety percent of the world’s energy demands. Their use, however, causes pollution and degrades the environment. The supply of these sources is also limited and their prices are reaching an all time high. The use of alternative power sources in such a situation is a promising option and the best to invest in. Alternative power sources are renewable which means their supply will never run out and they will always be available for reuse. These sources of power also do not cause pollution. They do not release any toxic substances into the atmosphere. The alternative sources of power do not contribute to global warming. These sources of power can be used cost effectively. Alternative power sources will always be readily available to produce power.

With so many benefits of alternative power sources, they will soon become the only energy sources that will be able to meet the rapidly rising energy requirements. But there are several risks involved in the use of alternative power sources. The first is that alternative power sources are relatively new and they might fail in the end which would mean no return on investments made. Although clean, it may end up harming the environment because alternative power requires the sources available in nature for its generation. Also the alternative power sources have still not proved themselves as the best alternative to fuel.

Therefore, investing in alternative sources of power must be done after proper research.