Sources of Energy Class 10 Notes pdf Science Physics CBSE NCERT Chapter 14? Characteristics of a good fuel: (iv) High calorific value (v) Less smoke (vi) Less residue after burning (vii) Easy availability (viii) Inexpensive (ix) Easy to store and transport? Fossil fuels: were formed millions of years ago, when plants and animal remains got buried under the earth and were subjected to high temperature and pressure conditions. E.g.: Coal, Petroleum, etc. These fossil fuels are non renewable sources of energy and cause environmental problems due to pollution.?

Therefore oth er systems based on non-conventional and renewable sources are being tried by many countries. These are solar, wind, sea, geothermal and biomass. After making a detailed preliminary analys is of biomass energy, geothermal energy, ocean thermal energy, tidal energy and wind energy, I focused mainly on Wind power for 7 th semester. Lecture Notes on Renewable Energy Sources Subject Code: BEE1703 7th Semester, B.Tech. (Electrical Engineering & EEE). Some energy sources have non energy uses, for example coal or natural gas can be. Non-conventional energy resources which are considered for large 1973, are called non-conven.

Thermal power plants: (i) Use coal, petroleum and natural gas to produce thermal electricity. (ii) Electricity transmission is very efficient.

(iii) The steam produced by burning the fossil fuels runs the turbine to produce electricity? Hydro power plant: (Refer to figure 14.3, page no.

246 of N.C.E.R.T Text book) (i) It is the most conventional renewable energy source obtained from water falling from a great height. (ii) It is clean & non polluting source of energy.

(iii) Dams are constructed to collect water flowing in high altitude rivers. The stored water has a lot of potential energy. (iv) When water is allowed to fall from a height, potential energy changes to kinetic energy, which rotates the turbines to produce electricity.? Disadvantages of Hydro power plant (i) Highly expensive to construct.

(ii ) Dams cannot be constructed on all river sites. (iii) Large areas o human habitation and agricultural fields get submerged. (iv) People face social and environmental problems.?

Non conventional sources: (1) Bio mass: o It is the source of the conventionally used fuels that are used in our country. E.g. Install cydia package without dependencies. : Cow dung cakes, fire-wood, coal, charcoal o Bio gas: It is a mixture of gases produced during decomposition of bio mass in the absence of Oxygen. (Anaerobic Respiration). Aktivator odin versii 137 7.

Methane is the major component of bio gas. O Bio gas plants: Animal dung, sewage, crop residues, vegetable wastes, poultry droppings, etc. Are used to produce Bio gas in Bio gas plants. (Refer to figure 14.4, page no. 247 of N.C.E.R.T Text book) (2) Wind energy: o It can be converted into mechanical and electrical energy. O Kinetic energy of the wind is used in running of wind mills, which are used to lift water, grind grains, etc. O Wind mill- (Refer to figure 14.5, page no.