Methods to Harness Energy What is Geothermal Energy?

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Methods of Harnessing Energy What is Geothermal Energy?

Geothermal originates from the Greek words geo (meaning earth) and therein (meaning heat). Convective circulation plays an important part in bringing heat to the surface from heated interior of the Earth.

Our Earth’s crust is a product of millions active volcanoes, massive amounts of magma, and lots of cooling below the surface. This persistent and widespread volcanism has created a wealth of natural resources around the globe.

Geothermal Power plants energy are extracted by groundwater heated by hot, large magma bodies. Extract the energy of Brantley 1994, Volcanoes located in the United States. USGS General Interest Publication.

Deep circulation of groundwater around fracture zones will reduce heat to lower levels. The heat is gathered from a wide region and then concentrated near the tanks that store water on the surface or discharged as hot springs. These reservoirs may hold hot water or a stream.

The reservoirs’ hot water or steam may be pumped directly into the surface. This low-energy waste water is frequently reinjected into the storage tank , or utilized for heating purposes. This technology is able to produce electricity , as well as heat for home and industrial uses.

The reliability, economy sustainability, and green nature of geothermal power have been demonstrated (World Bank Group, 2004).

There are two primary types that are available: (1) high temperature resources and (2) moderate/low temperatures resources. Geothermal resources that are high temperature are those that have temperatures as high as 220 degrees Celsius or higher, are primarily found in volcanic areas as well as islands chains.

Each continent has moderate to low temperature resources. High temperatures are used nearly exclusively for power generation, while the majority of the low temperature resources are used to heat direct or for agriculture and aquaculture.

What is the process behind Harnessing Geothermal Energy work?

Presently, there are three kinds of geothermal power plants currently in use.

Steam plants that directly use geothermal steam. These power stations that are dry use extreme heated steam (>455 degrees Fahrenheit or more than 235 degrees Celsius) and very little reservoir water. The steam flows straight through a tube and is then sent to a turbine that spins a generator to produce electricity. This is the oldest type of geothermal energy station. It was first utilized 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 make steam even when pressure is lower. Flash steam power plants make use of hot water from the reservoir at temperatures of greater than 360degF or more than 182 degrees Celsius. The pressure in the reservoir can be released after the reservoir is delivered to a generator.

A sudden decrease in pressure causes water to evaporate and turn into steam. The steam spins a turbine which generates electricity. Flash steam power plants and dry steam produce only a small amount of carbon dioxide, sulfur oxides, as well as nitric oxygen. However, this is 50 times less than traditional fossil fuel power stations.

Binary Cycle Plants use water at moderate temperatures (225 to 360degFor 107 to 182degC) from the geothermal reserve. Hot geothermal fluids can be heated through going through the other side that of the exchanger.

To generate electricity the fluid used is usually an organic compound that has low boiling points, such as Isobutane and Isopentane. Then it’s vaporized, and then passed through turbines.

The Kalina Cycle is also a source of ammonia-water liquid as a working fluid. As per Green Jobs 2002, the Kalina Cycle system increases geothermal plant efficiency as well as reducing construction costs. This, according to the manufacturers.

The geothermal power station as shown on the right is located in Casa Diablo’s geothermal field. Idaho National Engineering and Environmental Laboratory.

Geothermal Energy: Applications

  1. Space/District Heating - Schemes that make use of geothermal heat to supply more than 80percent of Reykjavik’s central heating needs are in use in many other cities across the USA, Poland, and Hungary. A plan to make use of hot water from a failed oil fields in Poland to substitute district heating using coal is being backed through the World Bank (World Bank Group 2004).
  2. Aquaculture and Agriculture - Plants, soils and fish ponds that have geothermal activity may enhance the growth of plants and fish in both moderate temperatures and more cold climates. A good example of this can be found in the Oserian farm located situated in Kenya (World Flowers 2005).
  3. Power Generation Geothermal power generation can produce a power output exceeding 8000 megawatts and is an established technology. It is especially well-known in islands or countries which rely heavily on imported fossil fuels (World Bank Group 2004).

Geothermal Energy Costs

The cost of geothermal energy production amounts to 4.5-7 cents an hour. While this is comparable to certain fossil fuel facilities, it must be remembered that geothermal electricity generation has an impressive reduction in pollution.

The scope of the project along with its quality, the cost of financing, and ownership will all affect the delivered costs.

Geothermal power plants require a significant amount of capital, but have low variable costs and minimal energy costs.

The financing structure is generally so that the capital costs of the project are due within 15 years. The project provides power at 5-10C/kWh.

The operating costs for the facility for in the coming 15-30 years is covered by maintenance and operations.

Geothermal Energy has other advantages

  1. The air pollution could be lessen The current geothermal fields emit about one-sixth the amount of CO2 as a gas electricity generating power station, and they produce no NOx or sulphur. (NOx) or sulfur (SOx).

The latest state-of-the-art integrated cycle plant emit virtually no air pollutants. Every 1,000 MW of power generated by geothermal will offset approximately 1.9 million pounds toxic pollutant air pollutants from Western skies.

It also will offset around eight billion pounds climate change CO2 emissions per year from gas power plants that are fired and a lot more from the fired coal power plants.

  1. Energy sources that are renewable: all types of geothermal energy are renewable in the event that the heat exchangers that are extracted from the earth aren’t higher than the amount of heat absorption into the thermo reservoir. Once it has been depleted, a geothermal reservoir that is used to generate electricity can take hundreds of years to replenish.

Recovering the reservoir of a district heating system could take anywhere from 100 to 200 years. Recovery of the reservoir of a geothermal heat pump could take up to 30 years.

  1. Reduce the dependence on imported electricity Geothermal energy is produced locally, which reduces trade deficits. Trade deficits can be cut to ensure that wealth stays in the country and promote more healthy economies. If imported oil were substituted with domestic resources, more than half of the annual U.S. trade deficit could be reduced (Green Jobs 2004,).

Geothermal energy has been proven to be a wave energy source that has been in use for more than 100 years. However, it is only now that we realize the potential of geothermal energy to replace and/or augment our existing renewable energy generated resources.

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 effective, clean, and inexpensive but its limited use seems to be its greatest weakness. Geothermal energy is only one-third of solar power that is dispersed over the Earth’s surface when compared with other options such as solar. It has the potential to be improved.

While geothermal energy sources can be expanded, their methods and techniques have remained inactive. We should also consider the potential benefits of alternative energy sources as we search for them.

Five ways to tap the original source of energy renewable Human power

Wind-up phone charger

Users of mobile phones who are dedicated should not be too far away from their power source or feel the fear of their battery going out. Its “Reactor” iPhone case is embedded with an ultra-thin generator. It lets you recharge your battery on your own by turning the handle that’s attached to the back of its. Although this method of energy generation may not be new but it provides the possibility that human power could be utilized to provide emergency power and is readily available when needed.

Light powered by gravity

The design of a product powered by humans can be difficult because it requires less work to produce power. Gravity Light solves this problem by making use of the potential of gravity. To lift the weight of the sandbag only requires one shot of power. The weight gradually drops to turn a spur gear system that power the LED for 20 minutes.

Human harvesting

Parasitic harvesting is the process that generates wind power through ordinary activities like walking. The nPowerPEG is a hand-held tube-shaped device that is able to be attached onto your backpack or belt. It generates electricity from movement by using a spring, magnet or an inductive coil. Although it doesn’t generate enough power to power high-wattage electronic devices like laptops and tablets The concept is high power efficiency as well as battery tech.

Flywheel kitchen appliances

Modern human-powered devices do not solely rely on the generation of electricity. Christoph Thetard’s mechanical flywheel drive RB2B power the kitchen with a variety of appliances. The flywheel rotates at 10,000 RPM through a geared transmission with mechanical power that is 350 W. The power of the wave is able to run various attachments like cutting disks, knives and whisk. While it’s unclear what the practicality of this gadget is however, the creator deserves praise for coming up with a design that challenges conventional notions that gadgets powered by humans need to be mobile and battery-powered.