Notes and Study material for Exams
Waste to Energy Introduction Waste to energy (WTE) is a process that converts waste materials into energy. This can be done through a variety of methods, including incineration, gasification, and pyrolysis. WTE can be a valuable tool for managing waste and reducing greenhouse gas emissions. How does waste to energy work? There are a number … Read more
Combustion/Incineration Combustion is a chemical reaction that occurs between a fuel and an oxidizer, releasing heat and light. The most common type of combustion is the burning of fossil fuels, such as coal, oil, and natural gas. Combustion is also used in many industrial processes, such as the production of electricity and the manufacture of … Read more
Pyrolysis/Gasification Pyrolysis and gasification are two thermochemical conversion processes that are used to convert organic materials into a variety of products, including fuels, chemicals, and biochar. Pyrolysis is a thermal decomposition process that occurs in the absence of oxygen, while gasification is a partial oxidation process that occurs in the presence of a limited amount … Read more
Anaerobic digestion is a process that converts organic waste into biogas and digestate. Biogas is a renewable energy source that can be used to generate electricity, heat, or fuel vehicles. Digestate is a nutrient-rich soil amendment that can be used to improve crop yields. Anaerobic digestion is a natural process that occurs in the absence … Read more
What is a pumped storage hydro power plant? A pumped storage hydro power plant is a type of hydroelectric power plant that uses two reservoirs at different elevations to store water. During periods of low demand for electricity, water is pumped from the lower reservoir to the upper reservoir. When electricity demand is high, the … Read more
Wind farm A wind farm is a group of wind turbines in the same location used to generate electricity. Wind farms vary in size from a single turbine to several hundred turbines covering an area of several square kilometers. The largest wind farm in the world is the Gansu Wind Farm in China, with a … Read more
Luminescent Solar Concentrators (LSCs) Luminescent solar concentrators (LSCs) are a type of solar cell that uses a luminescent material to convert sunlight into electricity. LSCs are made up of a thin layer of luminescent material, such as a dye or a semiconductor, that is sandwiched between two electrodes. When sunlight hits the luminescent material, it … Read more
Photovoltaic Electricity Photovoltaic (PV) electricity is a type of solar energy that converts sunlight into electricity using semiconductors. PV cells are made of materials that allow electricity to flow when light hits them. When sunlight hits a PV cell, it knocks electrons loose from their atoms. These free electrons flow through the cell, creating an … Read more
What is Renewable Energy? Renewable energy is energy that comes from natural sources or processes that are constantly replenished. These include sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy does not produce greenhouse gases or other pollutants, and it is becoming increasingly affordable as technology improves. Why is Renewable Energy Important? Renewable energy … Read more
What is a Bioreactor? A bioreactor is a vessel in which a biological reaction takes place. The reaction can be aerobic or anaerobic, and it can be used to produce a variety of products, including pharmaceuticals, biofuels, and chemicals. Bioreactors are used in a variety of industries, including the pharmaceutical, chemical, and food industries. They … Read more