Green Energy Resources

Green energy refers to natural resources that provide power with the least environmental impact. It’s a subset of renewable energy representing resources that don’t produce greenhouse gases or air pollution during use and production.

Typical green energy options include solar, wind, geothermal and biogas. They enter the electricity grid and are indistinguishable from traditional energy when you flip a switch or charge your phone.

Biomass

Biomass is any organic material that contains the chemical elements carbon and hydrogen. It can be burned to generate heat, or converted into liquid biofuels such as ethanol and biodiesel that can replace petroleum-based transportation fuels. Biomass can also be used to make industrial chemicals and plastics that are currently made from petroleum or natural gas.

Trees, woody plant material, crop residues, and purpose-grown energy crops provide biomass fuel. These materials can be harvested from existing forests, or from land that has been cleared for other purposes and then replanted with appropriate forest management practices to reduce fire risk and sequester carbon.

When burned, biomass produces clean, renewable heat or electricity without producing any emissions other than water vapor. It can also be processed into gaseous or liquid biofuels for use in conventional vehicles, or to produce synthesis gas that can replace natural gas in combined-cycle power plants.

Organic waste material, such as animal dung and human Clean new energy photovoltaic solar energy sewage, is collected in oxygen-free tanks called digesters, where it is decomposed by anaerobic bacteria to form methane and other byproducts that can be burned to generate energy. Biomass can also be converted to a gaseous fuel by processes like gasification and pyrolysis, which expose solid biomass material to high temperatures in the absence of oxygen to form synthesis gas (or syngas) consisting of carbon monoxide and hydrogen.

Wind

Wind energy is a renewable, clean and efficient source of energy that does not produce any greenhouse gases. It is a key component of a renewable portfolio and an important part of a greener future.

A turbine turns the kinetic energy of air currents into electricity by rotating blades. This mechanical energy is then used to run a generator and creates electricity that can be sold on the grid.

The energy produced from wind is renewable and can be used to replace fossil fuels, which are the primary source of pollution and climate change. It is also a highly versatile resource because it can be utilized everywhere, even in remote locations where other sources of power are unavailable.

Many people are concerned about the appearance of wind farms in their communities, but modern technology has made it possible to reduce visual impact and noise pollution. In addition, it is possible to build wind turbines in depopulated areas, so that they don’t disrupt wildlife habitat.

While the National Audubon Society supports wind power, they are calling for stricter guidelines to protect bird migration routes and other sensitive natural resources. They are also working with other environmental groups to develop innovative solutions that will improve the efficiency of turbines and make them less visible to migrating birds. It is also a common myth that it takes more energy to make a wind plant than it produces, but this is not the case. In fact, the average wind plant repays its carbon footprint in less than six months and then continues to produce emission-free electricity throughout its 20 to 30 year lifespan.

Solar

Solar energy is a renewable resource that does not deplete the earth’s natural resources. It also provides a clean alternative to fossil fuels and reduces carbon dioxide emissions, which are harmful to the environment. It can be used to produce electricity or heat homes and businesses. It can even be used to power vehicles and aircraft.

The most common way to harness solar energy is through photovoltaic (PV) cells that convert sunlight directly into electricity. These cells can be found on calculators and road signs, as well as in larger panels that provide electricity for homes and large commercial buildings. Other forms of solar energy include solar heating and cooling and concentrated solar power (CSP). SHC systems use the sun’s rays to heat a fluid that can then be used to generate electricity or run traditional electricity-generating turbines. CSP technology uses mirrors to focus (concentrate) sunlight onto a receiver that then generates electricity.

The ubiquity of PV cells and the competitive global market have driven costs down dramatically, making solar energy more affordable for consumers. In addition, many states offer incentives, rebates and tax credits that can further reduce the out-of-pocket cost of PV systems. Additionally, solar energy can be combined with storage devices to provide power during non-daylight hours, providing a comprehensive and reliable green energy solution.

Geothermal

There is a huge amount of thermal energy in the ground, and it can be tapped to generate electricity and provide heating and cooling for buildings. The heat energy is stored in marine the rock and water at depths of 10 to a few hundred feet below the Earth’s surface. Geothermal technologies take advantage of this heat energy, converting it into electricity or using it for direct heating.

There are three different types of geothermal power plants. The oldest type, called dry steam, takes steam directly from fractures in the rock to drive a turbine. The second design, known as a flash plant, pulls high pressure hot water and mixes it with cooler low pressure water to create steam that drives a turbine. The third type, a binary plant, takes hot water and passes it through a secondary fluid that has a lower boiling point than water. The resulting water vapour is used to drive the turbines.

The United States currently leads the world in geothermal power, but it is also one of the most expensive options for electricity generation. A more cost-effective approach, based on the technology used by TWI and popular in Sweden, is referred to as ground source heat pump (GSHP). In this technology, pipes with antifreeze circulate through the soil beneath a building and capture the difference between the ambient air temperature and the underground temperatures. The system is able to provide efficient heating in winter and comfortable humidity control in summer.