Monthly Archives - January 2017

Environmental Impacts of Power Production Technologies and Appropriate Mitigation Strategies

Environmental Impacts of Power Production Technologies and Appropriate Mitigation Strategies Environmental impacts of Coal power production Coal is a fossil fuel that is combusted in steam boilers to generate steam for driving steam turbines. Fossil energy is stored in chemical bonds in hydrocarbons. When the fuels are combusted, the bonds are broken down with release of carbon and methane gases into the atmosphere. Carbon is discharged from the fuels in the form of carbon dioxide or carbon monoxide. It is estimated [...]

Storage of Wind Energy

 Storage of Wind Energy Wind is an intermittent form of energy. But unlike solar energy generation which can be predicted, future wind speeds cannot be accurately estimated and thus planning for the evacuation of the generated energy is problematic. Vagaries of the wind speeds destabilize the grid and adversely affect power transmission. This situation creates a need for storage of energy produced during periods of low energy demand and high wind speeds. The stored energy should then be released during peak [...]

Energy from Waste

Energy from Waste Waste Energy recovery is the extraction of energy from waste. Solid wastes are combusted to give heat which is then used for electrical power generation. Other wastes, such as landfill matter, are digested anaerobically to give fuels such as methane, methanol, and ethanol. Also energy can be extracted from waste through other processes such as pyrolysis, gasification, and landfill gas recovery. Energy from waste can be applied in electrical generation and provision of heat energy for various [...]

Waste to Energy Recovery

Waste to Energy Recovery Waste-to -energy recovery is the conversion of unrecyclable waste to heat, electricity, or fuel through such processes such as combustion, pyrolysis, landfill gas recovery (LFG), and anaerobic digestion. Apart from electrical energy, the fuels obtained from waste to energy recovery methods include methane, ethanol, and methanol. These fuels are combusted either for electrical generation or to provide process heat in industries. This is a paper on waste-to-energy recovery and the commercial applications of the energy obtained. Waste [...]

Use of Nanostructures in Harvesting Solar Energy

Use of Nanostructures in Harvesting Solar Energy Abstract There is an increasing demand for clean renewable energy to counter pollution caused by carbonaceous fossil fuels such as coal and petroleum. Solar energy offers a promising alternative fuel because it’s cheap, abundant and renewable. The current commercially produced solar modules, made of doped silicon cells, have an average maximum conversion efficiency of 20%. Nanostructured semiconductors are deemed as possible low cost solution to low efficiency in solar modules. Nanostructures energy harvesters [...]

Dye Sensitized Solar Cells

Dye Sensitized Solar Cells             Solar energy harvesting is the conversion of electromagnetic radiation from the sun into electricity. Solar cells convert sunlight into electric current through photovoltaic effect. Silicon solar cells are manufactured from doped silicon semiconductor. Exposure of the semiconductor to sunlight causes the movement of electrons and holes which sets up an electric current (Lee, Lu, and Tseng 2). An interconnection of several solar cells forms a solar module.   Dye sensitized solar cells are made from natural [...]