Methods of Harnessing Energy What is Geothermal Energy?
Techniques for Harnessing Energy What is Geothermal Energy?
Geothermal originates of the Greek word geo (meaning earth) and (meaning warmth). Convective circulation plays an important function in bringing warmth to the surface of the earth’s interior that is hot.
Our Earth’s crust is a consequence of millions of volcanoes that are active, enormous volumes of magma, and a lot of cooling beneath the surface. The constant and extensive volcanism has produced many valuable natural resources throughout the world.
Geothermal Power plants energy is extracted through ground water heated by hot, large magma bodies. Extract the energy of Brantley 1994, Volcanoes located in the United States. USGS General Interest Publication.
The deep circulation of groundwater in fracture zones will allow heat to be absorbed into lower levels. This heat can be gathered from a wide area and concentrated in near the storage tanks on the surface, or it can be discharged as hot springs. These reservoirs can contain hot water or a stream.
The reservoirs’ hot water or steam can be pumped directly onto the surface. The waste water that is low in energy is often reinjected back into storage tanks or used to heat the tank for. This technique can be utilized to produce electricity , as well as heat for domestic and industrial uses.
The reliability, economy, sustainability, and the renewable energy of geothermal power have been proven (World Bank Group 2004).
There are two primary types of minerals: (1) high temperature resources and (2) moderate/low temperatures resources. Geothermal resources that are high temperature that can attain temperatures of 220 degrees Celsius or higher, are primarily located in volcanic regions and island chains.
Every continent has moderate-low temperature resources. High temperatures are mostly for power production, while the majority of the low temperature resources are used to heat direct or for aquaculture and agriculture.
How does Harnessing Geothermal Energy?
There are currently three types of geothermal power stations in operation.
Steam plants that directly use geothermal steam. These power stations that are dry use extreme high temperatures of steam (>455 degrees Fahrenheit, or >235 degrees Celsius) and only a small amount of reservoir water. The steam is pumped straight through a tube and is sent to a turbine that spins a generator to generate electricity. It is the earliest type of geothermal energy facility. It was first used by 1904 Lardarello, Italy. Geysers located in North California are one example of dry steam production (Green Jobs 2002).
Flash Steam Plants use high pressure hot water to create steam when the pressure is lower. Steam power plant flashes use hot water from the geothermal reservoir at temperatures of greater than 360degF or 182 degrees Celsius. The deep reservoir pressure can be released after the water is delivered into a generator.
A sudden decrease in pressure causes water to evaporate into steam. The steam spins a turbine which produces electricity. Steam power plant flash and dry produce very little carbon dioxide, sulfur oxides, as well as nitric oxide. 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. Hot geothermal fluids get heated through moving through one end that of the exchanger.
To generate electricity, the working fluid is typically an organic compound that has low boiling points, such as Isobutane as well as Isopentane. Then it’s vaporized, and then pumped through turbines.
The Kalina Cycle also uses an ammonia-water fluid as a working fluid. According to Green Jobs 2002, the Kalina Cycle system increases geothermal plant efficiency as well as reducing the cost of construction. 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 - Schemes which use geothermal energy to supply more than the 80% of Reykjavik’s heating requirements are used in many other towns in the USA, Poland, and Hungary. The program of using hot water from a failed oil wells in Poland to replace district heating based on coal is being supported by the World Bank (World Bank Group 2004).
- Aquaculture and Agriculture - Thermal soils, plants, and fish ponds with geothermal energy can help enhance the growth of plants and fish in both moderate temperatures and colder climates. One successful example is that of the Oserian farm located in Kenya (World Flowers 2005).
- Power Generation Geothermal power generation has a capability of over 8000 megawatts and is an established technology. It is especially well-known in countries or islands which heavily rely on imported fossil fuels (World Bank Group , 2004).
Geothermal Energy Costs
The cost of geothermal energy generated is 4.5-7 cents per hour. Although this is similar to certain fossil fuel facilities, but it is important to remember that geothermal power generation results in a dramatic reduction in pollution.
The size of the project, its quality, cost of financing, and ownership will all affect the costs of the project.
Geothermal power plants require a significant amount of capital, but have low variable costs and minimal fuel costs.
The structure of financing is typically to ensure that the initial costs of the project will be due within 15 years. The project provides power at 5-10C/kWh.
The costs of operating the facility over the next 15-30 years is covered by maintenance and operations.
Geothermal Energy also has many advantages
- The air pollution could be lessen The current geothermal fields emit around one-sixth the amount of CO2 as an electricity-generating gas power station, and produce no NOx or sulphur. (NOx) or sulfur (SOx).
The latest state-of-the-art combination cycle as well as geothermal binary plant emit almost no air pollution. Each 1,000 MW of power generated by geothermal will help offset around 1.9 millions of pounds harmful and harmful air pollution in Western skies.
It will also offset about eight billion pounds climate changing CO2 emissions per year generated by gas-fired power plants and a lot more from the fired coal power plants.
- Energy sources that are renewable: all types of geothermal heat are sustainable, provided that the heat exchangers that are extracted from the earth do not more than the heat absorption from the reservoir. After it is completely depleted the geothermal reservoir that is used for electricity generation can be a long time to replenish.
Recovering the district heating system reservoir can take between 100 and 200 years. The recovery of a geothermal heat pump reservoir could take up to 30 years.
- Reduce dependence on electricity imported: Geothermal energy is produced locally, which decreases trade deficits. Trade deficits can be reduced to ensure that wealth stays in the country and promote healthy economies. If imported oil was substituted with domestic resources, nearly half of the annual U.S. trade deficit could be eliminated (Green Jobs 2004,).
Geothermal energy is a proven source of energy from waves that has been used for over 100 years. It is only now that we understand that it is a potential source of energy to complement and replace our current renewable energy sources.
The United States has the majority of the geothermal resources located throughout the West, including California and. Geothermal energy is reliable cheap, clean, and safe however, its limited usage seems to be its greatest flaw. Geothermal energy represents only a fraction of the solar power dispersed over the Earth’s surface when compared with other options such as solar. There is potential for improvement.
Although geothermal energy units are capable of being developed, their techniques and technology have remained static. It is important to consider the benefits alternatives to fossil fuels when we look for them.
Five ways to harness the original source of energy renewable - human power
Wind-up phone charger
Users of mobile phones who are persistent must not be too far away from a power source or feel the fear of their battery running out. This “Reactor” iPhone case is equipped with an ultra-thin generator. It allows you to recharge your battery on your own through the control connected to its back. Although this method of power generation might not be new however, it does shed light on the possibility that human energy can be utilized to supply an emergency power source and is available in times of need.
Light powered by gravity
The design of a product powered by humans isn’t an easy task because it requires less work to produce power. Gravity Light solves this problem by making use of the power of gravity. To lift the weight of the sandbag only requires one burst of power. The weight will gradually drop to rotate a spur gear system that power the LED light for twenty minutes.
Human harvesting
Parasitic harvesting refers to the process of generating wind power from normal activities such as walking. The nPowerPEG is a tube-shaped handheld device that is able to be attached onto your backpack or belt. It generates power from motion with a spring, magnet or inductive coil. Although it doesn’t generate enough power to power large-watt electronics such as laptops and tablets, the concept has an impressive power efficiency as well as battery tech.
Flywheel kitchen appliances
Modern devices powered by humans do not rely solely on the creation of electricity. Christoph Thetard’s mechanical flywheel drive RB2B powers the kitchen with a variety of appliances. The flywheel rotates at 10,000 RPM with an geared transmission that has a mechanical power that is 350 W. The wave power can be used to run several attachments such as knives, slicing disks and whisk. While it’s unclear what practicality this device has, the designer deserves credit for coming up with a design that challenges conventional notions that all devices that are powered by humans have to be lightweight and battery-powered.
