Methods of Harnessing Energy What exactly is Geothermal Energy?
Methods of Harnessing Energy What exactly is Geothermal Energy?
Geothermal is derived from Geothermal is the Greek terms geo (meaning earth) and therein (meaning warmth). Convective circulation plays a significant role in bringing heat to the surface from the earth’s interior that is hot.
Our Earth’s crust is a product of millions active volcanoes, enormous amounts of magma and plenty of cooling below the surface. The constant and extensive volcanic activity has resulted in the creation of many precious natural resources across the globe.
Geothermal Energy produced by power plants is extracted through ground water that has been heated by large, hot magma bodies. Extract energy from Brantley 1994, Volcanoes within the United States. USGS General Interest Publication.
The deep circulation of groundwater in fracture zones will bring heat down to shallower levels. The heat is gathered from a wide area , and then concentrated in close to the surface storage tanks, or it can be discharged in hot springs. These reservoirs can contain hot water or a stream.
These reservoirs’ hot water or steam can be pumped directly to the surface. This low-energy waste water is usually reinjected into storage tanks or used for heating purposes. This technology can be used to generate electricity as well as heat for domestic as well as industrial purposes.
The reliability, economics, sustainability, and green nature of geothermal energy have been proven (World Bank Group, 2004).
There are two primary types of minerals: (1) high temperature resources and (2) moderate or low temperatures resources. Geothermal resources that are high temperature are those that have temperature of 220° Celsius or higher, are primarily found in volcanic areas as well as island chains.
Each continent has moderate to low temperature resources. High temperatures are mostly for power production, while the majority of low temperature resources are used for direct heating or for aquaculture and agriculture.
How does Harnessing Geothermal Energy work?
There are currently three kinds of geothermal power plants currently in operation.
Steam power plants that use direct geothermal steam. These power stations that use dry steam use extreme heated steam (>455 degrees Fahrenheit, or >235 degrees Celsius) and extremely little reservoir water. The steam flows directly through a pipe and is then sent to a turbine that spins a generator generate electricity. This is the oldest form of geothermal power station. It first was used in 1904 in Lardarello, Italy. Geysers in North California are one example of dry steam production (Green Jobs 2002).
Flash Steam Plants use high pressure hot water to produce steam even when temperature is low. The flash steam plants make use of hot geothermal reservoirs at temperatures of greater than 360degF or more than 182 degrees Celsius. The pressure in the reservoir is released when the reservoir is pumped into an electric generator.
A sudden decrease in pressure causes water to evaporate to steam. The steam spins a motor which generates electricity. Dry steam and flash steam produce very little carbon dioxide, sulfur oxide, and nitric Ox. But, this is 50 times less than traditional fossil fuel power plants.
Binary Cycle Plants use water at moderate temperatures (225 to 360degFor 107 up to 182degC) from the geothermal reserve. Geothermal fluids that are hot can be heated by going through the other side that of the exchanger.
To generate electricity, the working fluid is usually an organic compound that has low boiling points such as Isobutane and Isopentane. Then, it is vaporized and then pumped through turbines.
The Kalina Cycle also uses an ammonia-water fluid as a working fluid. Based on Green Jobs 2002, the Kalina Cycle system increases geothermal plant efficiency and lowers the cost of construction. This, according to the manufacturers.
The geothermal power station which is shown here is located in Casa Diablo’s geothermal field. Idaho National Engineering and Environmental Laboratory.
Geothermal Energy Applications
- Space/District Heating - Plans that use geothermal heat to provide more than 80percent of Reykjavik’s central heating needs are in use in many other towns in the USA, Poland, and Hungary. The program of using hot water from{ failed|| a failed} oil wells in Poland to replace coal-based district heating is supported by the World Bank (World Bank Group 2004).
- Aquaculture and Agriculture - Thermal soils, plants and fish ponds that exhibit geothermal activity may enhance the growth of plants and fish in both moderate temperatures and colder climates. One example that has been successful can be found in Oserian Farm in Kenya. Oserian farm located which is located in Kenya (World Flowers 2005).
- Power Generation - Geothermal power generation has a capacity of over 8000 MW and is an established technology. It is particularly popular in countries or islands which heavily rely on imported fossil fuels (World Bank Group 2004,).
Geothermal Energy Costs
The price of geothermal power generated can be as low as 4.5-7 cents per hour. Although this is similar to other fossil fuel sources, it must be remembered that geothermal power generation results in an impressive reduction in air pollution.
The size of the project, its quality, cost of financing, and ownership will all affect the costs of the project.
Geothermal plants require a lot of capital investment, yet they have very low variable costs as well as minimal fuel costs.
The financing structure is generally to ensure that the initial costs of the project are to be paid back in 15 years. The project provides power at 5-10C/kWh.
The operating costs for the facility over fifteen to thirty years are covered by maintenance and operations.
Geothermal Energy has other advantages
- The air pollution could be lessen Geothermal fields currently emit about one-sixth the amount of CO2 that is produced by a gas electricity generating power station, and they emit no NOx or sulphur. (NOx) or sulfur (SOx).
The state of the art integrated cycle plants emit virtually no air pollutants. Each 1,000 MW of geothermal energy will offset approximately 1.9 million pounds toxic and harmful air pollution from Western skies.
It will also offset about 8 billion pounds of climate changing CO2 emissions from gas power plants that are fired and a lot more from the fired coal power plants.
- Renewable energy source: All types of geothermal energy are renewable in the event that the heat exchangers extracted from the earth do not higher than the amount of heat absorption into the thermo reservoir. Once it has been depleted, a geothermal reservoir used for electricity generation can take hundreds of years to replenish.
Recovering a district heating system reservoir can take between 100 and 200 years. Recovering the geothermal heat pump reservoir may take 30 years.
- Reduce dependence on electricity imported: Geothermal energy is produced locally, which decreases trade deficits. It is possible to have trade deficits reduced to preserve wealth within the country and help promote more healthy economies. If imported oil was substituted by domestic resources, almost 50% of the annual U.S. trade deficit could be eliminated (Green Jobs 2004).
Geothermal energy is a well-established wave energy source that has been used for over 100 years. But, it’s only now that we realize the potential of geothermal energy to replace and/or augment our current renewable energy sources.
It is believed that the United States has the majority of the geothermal resources located throughout the West, including regions and regions. Geothermal energy is reliable, clean, and inexpensive, but this limited use appears to be its main flaw. Geothermal energy only accounts for a fraction of the solar power dispersed over the Earth’s surface when compared with other options such as solar. There is room for improvement.
Although geothermal energy units are capable of being developed, their techniques and technologies have remained virtually unchanged. We should also consider the benefits alternatives to fossil fuels while we seek them out.
Five methods to tap into the{ original|| first} source of energy renewable Human power
Wind-up phone charger
Users of mobile phones who are persistent must not be too far away from their power source or be afraid of their battery going out. The “Reactor” iPhone case is equipped with an ultra-thin generator. It lets you charge your battery manually by turning the handle attached to the back of its. While this method of energy generation might not be new, it sheds light on the possibility that human power could be used to provide emergency power and is readily available in times of need.
Gravity-powered light
Designing a human-powered product isn’t an easy task because it requires less effort to produce energy. Gravity Light solves this problem by harnessing the potential of gravity. To lift the sandbag weight all it takes is one burst of power. The weight slowly drops until it can rotate a spur gear system that power the LED for 20 minutes.
Human harvesting
Parasitic harvesting is the method of producing wind power through normal activities such as walking. The nPowerPEG is a tube-shaped handheld device that is able to be attached to your belt or backpack. It generates electricity through movement with a spring, magnet, or inductive coil. Although it doesn’t generate sufficient power for high-wattage electronics like tablets and laptops, the concept has an impressive energy efficiency and battery technology.
Flywheel kitchen gadgets
Modern devices powered by humans do not rely solely on the production of electricity. Christoph Thetard’s mechanical flywheel drive RB2B power the kitchen with a variety of appliances. The flywheel can spin at 10,000 RPM with an geared transmission that has a mechanical power supply of 350 W. The wave power can be used to run various attachments like cutting disks, knives and whisk. While it’s unclear how practical this device is however, the creator deserves praise for creating a concept that challenges conventional notions that devices powered by humans need to be portable and battery-powered.
