Natural and energy resources: Solar Energy

<p>A natural resource may be defined as any material given to us by nature which can be transformed in a  way that it becomes more valuable and useful. It is generally defined as all those things given by nature on, above and under the surface of the earth.</p><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1MW996NSnE7wa-wtlshbeecVL6YL1wwb8q2QQ3QmHb4a9ot_iqhljEXYZelXX04RxGRCUhMdN7OvbdqHUzYhKLzj9mhZ8VR9AmkDun1A0LWbcdnAKg_YdgF7Sys2TtS_vqhWIHgsw9Ok/s700/Top-5-BBA-Entrance-Exams.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="394" data-original-width="700" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1MW996NSnE7wa-wtlshbeecVL6YL1wwb8q2QQ3QmHb4a9ot_iqhljEXYZelXX04RxGRCUhMdN7OvbdqHUzYhKLzj9mhZ8VR9AmkDun1A0LWbcdnAKg_YdgF7Sys2TtS_vqhWIHgsw9Ok/s320/Top-5-BBA-Entrance-Exams.jpg" width="320" /></a></div><p>Solar energy:</p><ol style="text-align: left;"><li>It is renewable energy </li><li>Sun heat is directly utilized for water heating, room heating, vaporization ext.</li><li>Indian's first solar park in Gujarat was inaugurated on 29th Dec 2019.</li><li>The national solar mission (NSM) is major initiative of the government of India and state governments to promote ecologically sustainable growth while addressing Indian's energy security challenge.</li><li>The target is to achieve 100 GW by 2022.</li><li>Kamuthi solar power project is the largest single location solar power plant in the world, located in kamuthi in Tamil Nadu.</li><li>This solar plant is the the world's second largest solar park with a capacity of 648 MW.</li><li>Launched mobile app ARUN ( Atal Rooftop solar user Navigator) for ease of access of beneficiary's</li><li>for request sub mission and awareness. </li></ol><p><b>Advantages of solar energy</b></p><ul style="text-align: left;"><li>It is clean, available in plenty and uninterrupted.</li><li>The solar energy devices can be installed even in remote villages and now are even getting inexpensive with the advancement in technology and increased competition.</li></ul><p><b>Limitations</b></p><ul style="text-align: left;"><li>The limitations with solar energy is that it can't be sued in the temperate regions, also consumes land and can't be used to run heavy machines.</li><li>The target for India has been set under national solar mission, around 100 GW including both rooftops and large and medium scale grid installations.</li></ul><p><b>Uses</b></p><ul style="text-align: left;"><li>Direct solar can be used as heat, light, and electricity through the use of solar cells.</li><li>Direct use of solar energy can be used through various devices like: Three types of systems a) passive b) active c) photovoltaic     </li></ul><p><u>a) Passive solar energy </u></p><p>Some of the earliest uses of solar energy were passive in nature such as to evaporate sea water for producing salt and to dry food and clothes.</p><p><u>b) Active use of solar energy </u></p><ul style="text-align: left;"><li>Active solar heating and cooling systems rely on solar collectors which are usually mounted on roofs.</li><li>Such systems also require pumps and motors to move the fluids or below air by fan in order to deliver the captured heat.</li><li>The main application of these systems is to provide hot water, primarily for domestic use.</li></ul><p><u>c) Solar cells or photovoltaic technology </u></p><ul style="text-align: left;"><li>Solar energy can be converted directly into  electrical energy by photovoltaic cells.</li><li>Photovoltaic cells are made of silicon and other materials added as an impurity. When sunlight strikes the silicon atoms, the electrons are ejected. This principle is called as " photoelectric effect".</li><li>A typical solar cells is generally a transparent wafer that contains a very thin semiconductor.</li><li>Sunlight energizes and causes electrons in the semiconductor to flow. This flow creates an electrical current.</li></ul>

environment paper-I notes Natural and energy resources: Solar Energy

A natural resource may be defined as any material given to us by nature which can be transformed in a  way that it becomes more valuable and...

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