.. temperature and contaminant-free environments. Solar cooling can be achieved through the use of solar energy as a heat source in an absorption cooling cycle. Solar power research is being pursued in connection with efforts to design residential and commercial buildings that will use energy more efficiently. Some other promising devices are solar collectors and solar mirrors. Solar energy is a very expensive process that take years to develop the technology for it. This energy can only be used in the daylight ( when the sun is out ), so during the night you wouldn’t have energy then.
Another important source of energy is wind power. The most popular device is a mechanical device that harnesses wind power in order to pump water, grind grain, power a sawmill, or drive an electrical generator. This device is called a windmill. Windmills were probably not known in Europe before the 12th century, but then they became the chief source of power until the steam engine. The windmill is very useful on farms where farmers need water to irrigate their crops on the farm.
The windmill pulls water from underground water wells so it can be used for irrigation. The windmill is also made for decoration and sold for large amounts of money. It is very expensive to make and you have to have a large land space to put a windmill on. Also, the windmill makes so much noise that it can’t be put near any houses. A wind turbine is used to generate electricity.
They are even designed to on in light winds. The wind turbine is a huge invention to make work easier, throughout the whole course of time. The next important energy source is a type of energy called geothermal energy. Geothermal energy is based on the fact that the earth is hotter, when drilled deeper below the earth’s surface. Some scientists have suggested using the earth’s internal heat as a source of energy.
Such energy derives from steam trapped deep in the earth. Brought to surface, it will drive a turbine to produce electricity. Geothermal energy is released naturally in geysers and volcanoes. In California, 7% of the state’s electricity is generated by the geothermal plant complex known as the Geysers, which have been in production since 1960. The energy we get from the ground is then transferred into energy through a long and expensive process. We can drill into the earth’s surface and get the energy from many places throughout the world.
It is much easier to get this energy than getting it from a windmill. Geothermal energy is used in electric power generation and direct heat applications such as space heating and industrial drying processes. It was developed for electrical power in 1904 in Tuscany, Italy, where power production continues today buildings in the vicinity. A hot spring is a form of geothermal energy that is a natural discharge of groundwater that has a elevated temperature. Most hot springs result from the emergence of groundwater that has passed through or near recently formed hot igneous rocks. Iceland, Yellowstone Park, and North Island of New Zealand are known for their hot springs. A geyser is a hot spring which water and steam are ejected periodically to heights ranging from a few to several hundred feet.
Geothermal generating plants use geysers to produce electricity. Nuclear power is another important energy source. Nuclear power or nuclear energy is the energy stored in the nucleus of an atom and released through fission, fusion, or radioactivity. The release of nuclear energy is associated with changes from less stable to more stable nuclei and produces far more energy for a given mass of fuel than any other source of energy. The development of nuclear energy made available another source of energy.
The heat of a nuclear reactor can be used to produce steam. Then it can be directed through a turbine to drive an electric generator. The reactor is so constructed that the fission of atomic nuclei produces a self-sustaining nuclear chain reaction, in which the produced neutrons are able to split other nuclei. Nuclear energy is measured in millions of electron volts. Any electric power generating plant is one part of a total energy cycle.
The uranium fuel cycle that is employed for LWR systems currently dominates worldwide nuclear power production. This cycle has many steps and takes a lot of time and money. If any nuclear items spill or contaminate anything a special team is brought in with special suits to clean it up. Nuclear energy is said to be here on earth for a very long time. The last energy source is biomass energy. Biomass energy is the fuel energy that can be derived directly or indirectly from biological sources.
Biomass energy from wood, crop residues, and dung remains the primary source of energy in developing regions. In a few instances it is also a major source of power, as in Brazil, where sugarcane is converted to ethanol fuel. In China’s Sichuan province fuel gas is obtained from dung. Various research projects aim at further development of biomass energy, but economic competition with petroleum has mainly kept such efforts at an early development stage. Corncobs are an important source of furfural, a liquid used in manufacturing nylon fibers and phenol-formaldehyde, refining wood resin, making lubricating oils from petroleum, and purifying butadiene in the production of synthetic rubber. Ground corncobs are used as a soft-grit abrasive. Large, whole cobs from a special type of corn,cob pipecorn are used for pipes for smoking tobacco. Corn oil is extracted from the germ of the corn kernel and is used as a cooking and salad oil and in solid form as margarine. It is also used in the manufacture of paints, soaps, and linoleum.
The search for alternate sources of energy has made corn an important fuel source. It is also processed to produce alcohol for use with gasoline as gasohol and the dry stalk is a fuel biomass. The cons for biomass energy is that the items used in this cycle is so scarce that it is very hard to find. One time in the future all of the items will be unavailable and cannot be used. The demand for energy has increased steadily, not only because of the growing population but also because of the greater number of technological goods available and the increased affluence that has brought these goods within the reach of a larger proportion of the population. Despite the introduction of more fuel-efficent automobiles, the consumption of gasoline by vehicles in America increased by 18% between 1973 and 1989.
The rise in gasoline consumption is attributed to an increase in the number of miles the average person travels and to a 42% increase from 1973 to 1989 in the number of cars on the road. By harnessing the sun, wind, falling water, plant matter, and heat from the earth, energy planners expect to decrease the environmental impact of energy use. In this vision for the future, renewable energy sources would complement fossil fuels and, eventually, emerge as a significant energy source. Despite various legislative incentives over two decades toward this goal in the US, however only a small fraction of electricity needs are supplied by renewable energy technologies other than hydropower. Most of the nonhydro renewable power comes through some form of combustion, such as the burning of biomass, landfill gas, or municipal solid waste. Relatively little electricity comes from solar, wind, and geothermal sources.
The limitations on renewable energy’s progress to date result from its relatively high cost and the economics of the utility industry. It is faced with an increasingly competitive environment and is generally awash in surplus power. Although renewable energy technologies have overcome a number of formidable technical hurdles to bring costs down and increase reliability, further progress has been prevented by the lower cost of natural gas and the efficiency of gas-fired generating plants. As costs continue to decline, the renewable energy market can be expected to grow, particularly if possible global warming trends continue to be linked with greenhouse gases such as those emitted by fossil fuels. Other factors are that increase interest in renewable energy include cost advantages in niche markets, regulatory pressures, customer service requirements, fuel flexibility, and security.