当涂县档案局举办新农村建设档案工.ppt

RENEWABLE ENERGY- Inexhaustible source of energy. Ex-solar, Hydro, Wind, Tidal& Geothermal NON-RENEWABLE ENERGY- Exhaustible with time. Ex- Fossil fuels, Nuclear fuels. It is not constantly available on earth Thus some form of storage is needed to sustain solar energy through the night and during rainy season Solar energy is diffused. Flat plate collector Parabolic or concentrating collector Renewable source of energy Pollution free After the capital cost, the cost of power generation is quite low Wide range of applications, powering street lights to satellites Capital cost is very high Large area of land is required Large number of solar panels are required Affected by seasons. Electrical energy can be generated by wind energy by utilizing the kinetic energy of wind Wind mills are classified into two types Horizontal axis wind turbine Vertical axis wind turbine Wind Is Renewable And Free Of Cost Pollution free Can be installed in remote villages, thus reducing costly transmission lines Capital cost is very high Large area of land is required Very diffuse source. maintenance cost is very high It is inexhaustible source of energy No problem of pollution After the capital cost, the cost of power generation is quite low High output can be obtained compared to solar or wind energy Capital cost is very high As the head is not constant, variable output is obtained As the head is low, large amount of water is necessary for the turbine It will not operate when the available head is less than 0.5m Geothermal energy is cheaper Used as space heating for buildings Used as industrial process heat Geothermal energy is inexhaustible Low overall power production efficiency (about 15%)