Tag: geography

Lignite is a low grade brown coal, which is soft with high moisture content. The principal lignite reserves are in Neyveli in Tamil Nadu and are used for generation of electricity. These fuels are found at following places:

• Petroleum: Thiruvarur, Narimanam i.e Kaveri Delta Region
  
• Lignite: Neyveli
  

Limestone, mica, magnesite, steatite and salt are the non-metallic minerals of Tamil Nadu. Following are the places they are found

1. Limestone: Virudhunagar, Thoothukudi, Tirunelveli, Tiruchirappalli, Kanchipuram and Salem.
2. Mica: Tiruchirappalli, Coimbatore and Ramanathapuram.
3. Magnesite: Salem, Namakkal, Coimbatore and Erode.
4. Steatite: Vellore, Cuddalore, Coimbatore, Salem, Tiruchirappalli.
5. Salt: Chennai, Thoothukudi, Cuddalore, Nagapattinam and Thiruvarur.

Mettur is an industrial plant located in Salem district in the state of Tamil Nadu and is constructed across the Kaveri River in Tamil Nadu. It was constructed in 1934 and took 9 years to complete. Maximum height and width of the Dam are 214 and 171 feet respectively. 

• Photovoltaic thermal hybrid solar collector (PVT) are systems that convert solar radiation into thermal and electrical energy.
  
• These systems combine a solar PV cell, which converts sunlight into electricity, with a solar thermal collector, which captures the remaining energy and removes waste heat from the PV module.

As the demand for energy is increasing and conventional sources of energy such as coal, petroleum, natural gas, etc. are depleting, non-conventional sources of energy are more needed. Sun, wind, biomass, tidal energy, geo-thermal energy and even energy from waste material are examples of non-conventional energy. Sun is the biggest source of non-conventional energy. As sun is the source of all energy on the earth, it produces plenty of solar energy. This energy is abundant, renewable, pollution free and eco-friendly.

• The Mettur Thermal Power Station is a coal-fired electric power station located in Salem district of Tamil Nadu. 

Kalpakkam is mostly famous for its nuclear plants and affiliated research installations. These include the Madras Atomic Power Station (MAPS), one of India's nuclear power plants, Indira Gandhi Centre for Atomic Research (IGCAR), and Bhabha Atomic Research Center, an affiliate of the Department of Atomic Energy (DAE).

• In a thermal power plant a steam turbine is rotated with help of high pressure and high temperature steam and this rotation is transferred to a generator to produce electricity.