There are many forms of renewable energy. Most of these renewable energies depend, in one way or another, on sunlight. Wind and hydroelectric power are the direct results of differential heating of the Earth's surface which leads to air moving about (wind) and precipitation forming as the air is lifted. Solar energy is the direct conversion of sunlight using panels or collectors. Biomass energy is stored sunlight contained in plants. Other renewable energies that do not depend on sunlight are geothermal energy, which is a result of radioactive decay in the crust combined with the original heat of accreting the Earth, and tidal energy, which is a conversion of gravitational energy.
Read the forms of renewable energy.
Write a description of each form of renewable energy in one sentence.
Solar. This form of energy relies on the nuclear fusion power from the core of the Sun. This energy can be collected and converted in a few different ways. The range is from solar water heating with solar collectors or attic cooling with solar attic fans for domestic use to the complex technologies of direct conversion of sunlight to electrical energy using mirrors and boilers or photovoltaic cells. Unfortunately, these are currently insufficient to fully power our modern society.
Wind Power. The movement of the atmosphere is driven by differences of temperature at the Earth's surface due to varying temperatures of the Earth's surface when lit by sunlight. Wind energy can be used to pump water or generate electricity but requires extensive areal coverage to produce significant amounts of energy.
Hydroelectric energy. This form uses the gravitational potential of elevated water that was lifted from the oceans by sunlight. It is not strictly speaking renewable since all reservoirs eventually fill up and require very expensive excavation to become useful again. At this time, most of the available locations for hydroelectric dams are already used in the developed world.
Biomass is the term for energy from plants. Energy in this form is very commonly used throughout the world. Unfortunately the most popular is the burning of trees for cooking and warmth. This process releases copious amounts of carbon dioxide gases into the atmosphere and is a major contributor to unhealthy air in many areas. Some of the more modern forms of biomass energy are methane generation and production of alcohol for automobile fuel and fueling electric power plants.
Hydrogen and fuel cells. These are also not strictly renewable energy resources but are very abundant in availability and are very low in pollution when utilized. Hydrogen can be burned as a fuel, typically in a vehicle, with only water as the combustion product. This clean-burning fuel can mean a significant reduction of pollution in cities. Or the hydrogen can be used in fuel cells, which are similar to batteries, to power an electric motor. In either case, significant production of hydrogen requires abundant power. Due to the need for energy to produce the initial hydrogen gas, the result is the relocation of pollution from the cities to the power plants. There are several promising methods to produce hydrogen, such as solar power, that may alter this picture drastically.
Geothermal power. Energy left over from the original accretion of the planet and augmented by heat from radioactive decay seeps out slowly everywhere, every day. In certain areas, the geothermal gradient (increase in temperature with depth) is high enough to exploit to generate electricity. This possibility is limited to a few locations on Earth and many technical problems exist that limit its utility. Another form of geothermal energy is Earth energy, a result of the heat storage in the Earth's surface. Soil everywhere tends to stay at a relatively constant temperature, the yearly average, and can be used with heat pumps to heat a building in winter and cool a building in summer. This form of energy can lessen the need for other power to maintain comfortable temperatures in buildings, but cannot be used to produce electricity.
Other forms of energy. Energy from tides, the oceans, and hot hydrogen fusion are other forms that can be used to generate electricity. Each of these is discussed in some detail with the final result being that each suffers from one or another significant drawback and cannot be relied upon at this time to solve the upcoming energy crunch.
Wind Power uses the movement of air, or wind, to generate electricity.
Hydroelectric energy is generated by the fall of water from a high place to a lower place.
Biomass energy is created by burning plants, which also produces carbon dioxide gases.
Hydrogen produces energy when it is burned or used in fuel cells.
Geothermal power uses heated water or steam to from Earth to power turbines to generate electricity.
Solar is the easiest way to obtain the power but it depends on the sunlight so it might be an insufficient way when it rains.
返信削除Wind power is used machines which is called "wind farm" and it is generally put on the ground where has strong wind.
Hydroelectric energy uses water which was lifted from the oceans by sunlight but it cost lots of money because it needs to excavation from deepest point.
Solar energy have some kinds but they can't produce power constantly.
返信削除Wind power uses winds and also, large space.
Hydroelectric energy produce power by using falling water.
Biomass usually use tree so CO2 generate during the process.
Hydrogen and fuel cells produce strong power but they aren't so eco.
Geothermal power use ground that have high tempereture.
Solor have two ways, one is boil water and the other is convertedsolor power to electricity.
返信削除Wind power can pump water without make electricity.
Hydroelectric energy use the power of falling water.
Biomass have two way, burn plants or make fuel and alcohol.
Hydrogrn and fuel cells mean burn hydrogen, it produce only water.
Geothermal power means get heat from very deep place to heat or cool building.
Solor power produces electicity from sun by using millors, photovoltic cels and boiller.
返信削除Wind power needs wind and extensive places.
Hydroelectronic energy is used water fallen system and spi a terbin and also need dam.
Biomass prouce energy by burning trees orgabages .
Hydrogen and fuel cells generate electricity by burning hydrogen as fuel.
Geothrmal power needs heat to produce energy under the surface.
Other forms of enegy from tides the ocean,and hot hydrogen fusion need natural power to genarate.
Solor gets power from the sun and has a few ways to use.
返信削除Wind power needs atmosphere, pump water, generalte electricity and large area.
Hydroelectric enagy uses the water which was lifted from the oceans by sunlight.
Biomass uses plants and releases carbon dioxide so it is not good for air.
Hydrogan and fuel cells which are also not renewable energy resources burn hydrogen and fuel.
Geothrmal power uses heat pumps and enough temperature.