Solar energy
Solar thermal collectors, solar photovoltaics, solar thermal power generation, and artificial photosynthesis
It refers to an energy used by a series of technologies that are radiated from the sun and the heat that is being developed. The organisms that form from the earth mainly live with the heat and light provided by the sun, and since ancient times, humans have learned to dry the objects, and As a method of preserving food, for example, salt production [need to be disambiguated] and salted fish. However, under the reduction of fossil fuels, it is intended to further develop solar energy.
Solar technology is divided into active (active) and passive (passive)
Active: Solar photovoltaic and photothermal conversion, using electricity or mechanical equipment for solar energy collection, and these devices operate on external energy sources.
Passive: the introduction of sunlight into the building for lighting, etc., which is to use the design of the building, select the materials used, etc. to achieve the purpose of using solar energy, because the operation does not require external energy supply.
Solar power is an emerging renewable energy source
Solar energy in a broad sense is a source of many energy on Earth, such as wind energy, chemical energy, and potential energy of water. Fossil fuels can be called ancient solar energy. Solar energy is abundant, no transportation is required, and environmental pollution is low. Solar energy has created a new form of life for human beings, enabling society and humanity to enter an era of energy conservation and pollution reduction.
Green energy definition
Green energy comes from natural sources such as sunlight, wind, rain, tides, plants, algae and geothermal. These energy sources are renewable, which means they are naturally replenished. In contrast, fossil fuels are a kind of development that takes millions of years to develop and will continue to be used to reduce limited resources. Renewable energy is also much less environmentally friendly than fossil fuels, and its pollutants, such as greenhouse gases, as a by-product, cause much less impact on climate change. Access to fossil fuels usually requires either mining or drilling deep, often in ecologically sensitive areas. Green energy, however, uses energy resources all over the world, including rural and remote areas that do not use electricity in other ways. Advances in renewable energy technologies have reduced the cost of solar panels, wind turbines and other green energy sources, and will generate electricity in the hands of people, not those in the hands of oil, gas, coal and utility companies. Green energy can replace fossil fuels in all major areas of use, including motor vehicles for electricity, water and heating.
Type of green energy
The following are six common types of green energy:
1. Solar Power - The most common type of renewable energy, solar power is the use of photovoltaic cells, which absorbs the typical generation of sunlight and converts it into electricity.
Solar energy can also be used for building heating and water, providing natural lighting and cooking. Solar technology has become cheap enough to power everything from small handheld gadgets throughout the neighborhood.
2. Wind power - Air flow on the surface of the earth can be used to push turbines, with stronger winds producing more energy.
High-altitude sites and historical areas are just offshore and tend to provide the best conditions for capturing the strongest winds. According to a 2009 study, a land-based, 2.5 MW wind turbine network in rural areas can operate at 20% of its rated capacity and can consume 40 times less energy worldwide.
3. Hydropower - Also known as hydropower, hydropower generated by the circulation of water on Earth, including evaporation, rainfall, tides, and the power to run water through dams.
Hydropower relies on high levels of precipitation to produce significant energy.
4. Geothermal energy - The thermal energy of the lower crust, which originated from the radioactive decay of the initial formation of planets and minerals.
Geothermal energy in the form of hot springs has been used for thousands of years of human bathing, and now it is used to generate electricity. Only in North America, where underground storage of enough energy produces 10 times the power of coal is currently the same.
5. Biomass - Natural materials in life such as: wood waste, wood chips and combustible agricultural waste can be converted into much less energy than greenhouse gases emissions
The source of the base fuel.
This is because these materials are called biomass and contain energy stored from the sun.
6. Biofuels - not only the combustion of biomass produces energy, but sometimes these renewable organic materials are converted into fuel.
Notable examples include ethanol and biodiesel. Biofuels provide 2.7% of the world's fuels, road transport in 2010, and must meet more than 25% of the potential world demand, and have been used as transportation fuels by 2050.