Waste heat can produce 100,000 megawatts of electricity. As the demand for power increases with the use of various electrical appliances for home and office use, and as concern for CO2 emissions grow among individuals who are feeling the heat of the greenhouse effect, the call for recycling energy and recovering waste heat is now stronger than ever, particulary for China and the US, where it generates most waste heat.
Ernest Orlando Lawrence Berkeley National Laboratory estimated that up to 100,000 megawatts (MV) or 100 gigawatts (GW) of electrical capacity can be produced annually by the US through recycled energy or waste heat. This translates to 742 terawatt-hours (TWh) of electricity or a 19% savings in US electricity consumption. This also means that carbon dioxide (CO2) emissions can be reduced by up to 400 million metric tons along with 630,000 metric tons of nitrogen oxides (NOx).
Waste heat is the smoke coming from chimneys, boilers roofs of power plants and industrial smoketacks. Waste heat could also come from domestic appliances, now the fastest-growing consumers of energy in the world. According tot Worldwatch Institute, making it possible for 20% to 50% of burned fuel to go into the atmosphere as waste heat, as reported by the US Department of Energy (DOE).
Renewable energy production helps the environment by not adding to the fossil fuel consumption and CO2 emissions of society.With the exception of biomass, electricity and thermal energy production do not give off nitrogen oxides, sulfur oxides, particulate matter and carbon dioxide. Popular choices for renewable energy sources have always included solar, wind, geothermal and hydropower sources. Also the Green Turbine can play a part in the conversion of waste heat, especially for small scales installations.