Phy-hydel power
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Hydroelectric power has been used throughout history by harnessing the energy from moving water. It has several advantages as a renewable source of energy including minimal pollution since no fuel is burned, water is provided naturally, and it helps reduce greenhouse gas emissions. While it uses a natural resource, hydroelectric power has relatively low operational costs and proven reliable technology over long periods of time.
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Dr. P.Rajasekaran from Er.Perumal Manimekalai College Of Engineering Hosur – Tamil Nadu gave a presentation on energy conservation in renewable energy at Sri SAIRAM College of Engineering Anekal Bengaluru. The presentation discussed various renewable energy resources like solar, wind, hydro, tidal, biomass, and geothermal energy. It provided estimates of renewable energy potential and compared it to depletable energy resources. Advantages and disadvantages of different renewable technologies like passive solar heating, active solar heating, solar power towers, and solar thermal plants were also presented.
Recent trends in non conventional energy sources.pptx
This document provides an overview of recent trends in non-conventional energy sources. It discusses how overuse of conventional sources like fossil fuels leads to issues like deforestation and global warming. It then summarizes several non-conventional energy sources like solar energy, which can be harnessed through solar panels and water heaters; hydro-energy, which uses dams and turbines to convert the kinetic energy of flowing water into electricity; and tidal energy, which uses barrages and turbines to generate power from ocean tides. The presentation concludes that adopting these non-conventional renewable sources is crucial for meeting climate targets and sustaining a cleaner environment for future generations.
Energia renovavel
This document lists and briefly describes various renewable energy sources, including tidal power, wave power, solar power, wind power, hydroelectricity, radiant energy, geothermal power, biomass, compressed natural gas, and nuclear power. It then discusses which renewable energy sources would be well-suited for implementation in Cape Verde, specifically singling out solar power, wind power, wave power, biomass, and geothermal power. Finally, it provides more detail on a project in Sao Vicente, Cape Verde that transforms biomass materials into electrical energy, including information on its location, construction, funding, energy contribution, environmental benefits, and maintenance schedule.
Desalination of Sea Water into Fresh Water Using Thermal and Tidal Power
The document discusses a proposal to produce fresh water from seawater using thermal and tidal power in a sustainable way. It proposes using a central receiver solar thermal power plant to heat seawater and produce steam, with some steam used to generate electricity via turbines and the rest cooled to produce fresh water. Tidal power would also be used to generate electricity, which could power the solar plant during periods without sunlight. By using this clean energy to drive distillation without fossil fuels, the method could provide fresh water while limiting environmental impacts.
Hydro power
This document discusses hydroelectric power generation using dams. It notes that hydro power has been used for centuries to power mills, and is now mainly used to generate electricity. Dams are constructed on streams and rivers to harness the kinetic energy of flowing water. Approximately one fifth of the world's electricity comes from hydroelectric sources. Large dams like Hoover Dam can generate significant amounts of hydroelectric power through turbines powered by falling or flowing water. While hydro is a renewable source without fuel costs or direct emissions, dams can negatively impact aquatic ecosystems and require population relocation.
Sustanability
This document provides information about hydropower, including:
- Hydropower harnesses the kinetic energy of moving water to generate electricity through turbines connected to generators.
- The main types of hydropower systems are impoundment, diversion, and pumped storage. Impoundment uses dams to store water in reservoirs, while diversion channels water without dams. Pumped storage pumps water between reservoirs.
- Large hydropower plants supply electricity to many consumers, while small and micro plants power individual needs. Hydropower provides clean energy but building large dams is expensive and can negatively impact communities and ecosystems. Proper management is needed to address issues.
Presentation1.pptx
This document discusses underwater windmills, which extract tidal power from ocean currents in a similar way that wind turbines extract wind power. It describes the main parts of underwater windmills including turbines, gearboxes, generators, and support structures. Underwater windmills operate by using the flow of water past their blades to rotate the turbine and generator to produce electricity. While the initial costs are high, underwater windmills provide renewable energy with no emissions and have potential to be cost competitive with fossil fuels in the long run. The document also notes specific tidal farm projects planned off the coast of India.
Hydroelectric Power
Hydroelectric power plants capture the energy of flowing water to generate electricity. The most common type uses a dam to store water in a reservoir, then water released through turbines spins a generator. Dams are expensive to build and can cause environmental issues like flooding habitat, but hydro provides renewable energy without pollution. Hydroelectric power works best where there is abundant water, steep valleys to build dams, and nearby demand for electricity.
UNDERWATER WINDMILL
The document summarizes Amith K T's seminar presentation on underwater windmills. It describes underwater windmills as turbines placed on the ocean floor that harness the power of tidal currents by rotating just as above-water windmills rotate via wind power. The presentation covers the key topics of renewable energy technologies, the history and development of wind power generation, the main components and working principle of underwater windmills, their types and advantages like being renewable and having low environmental impact, as well as challenges like high installation costs and difficult maintenance. The conclusion expresses optimism about tidal power ultimately becoming cost-competitive with fossil fuels.
Tidal Energy By Majida Islam
Tidal energy has potential prospects in Pakistan due to its tidal processes. Tidal energy exploits the movement of water caused by tidal currents and rise/fall of sea levels, which can power turbines. Pakistan has suitable sites like the Indus Delta creek system and Korangi/Sir Creeks, which see high tidal fluctuations of 2-5 meters that could produce 1100KW of power. Developing tidal energy plants could boost the socio-economics of coastal communities and help overcome Pakistan's energy shortage, though it cannot fulfill all demand and more research is needed to reduce costs.
Hydro electric power plant
This document provides an overview of hydroelectric power plants. It introduces hydroelectric power and notes that China is the largest producer and India generates 129 TWh annually. The history section discusses the first uses of hydro power dating back over 2000 years and the establishment of early power stations in the late 1800s/early 1900s. Key components of hydroelectric plants are described like turbines, generators, governors and draft tubes. Francis turbines directly coupled to generators are highlighted. Advantages include renewable energy generation and flood control, while disadvantages include high capital costs and dependence on water availability.
Power palnts
This document summarizes steam and hydroelectric power plants. For steam power plants, fossil fuels are burned to produce high pressure steam that drives turbines connected to electric generators. Key factors in steam plant design are reliability, low capital costs, and small space requirements. Hydroelectric plants utilize the kinetic or potential energy of water to power turbines connected to generators. Dams are constructed to form reservoirs and penstocks channel high pressure water to drive the turbines. Important site selection factors for hydroelectric plants include available water sources, water storage capacity, water head, accessibility, and land type. Both steam and hydroelectric plants have advantages like reliable power generation but also disadvantages such as high maintenance costs or long construction times.
Ocean themal energy conversion
This power point presentation deals ocean energy conversion technique. This tells how ocean energy convert in to useful energy i.e. in accessible form.
Underwater windmill
The document discusses an underwater windmill, which extracts power from tides. It has main parts including turbines, a gearbox, and generator. The turbines are installed on the ocean floor and convert kinetic tidal energy into electricity. As the tides cause water to flow, it makes the turbine rotor spin, which turns the generator via the gearbox to produce electricity. The electricity is transmitted via cables to land. While high initial costs and difficulty of installation are disadvantages, underwater windmills have benefits of being renewable, emissions-free, and having low maintenance costs.
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pd - popular struggles
This document discusses different types of organizations and movements that influence government decisions in a democracy. It provides the example of the Narmada Bachao Andolan movement in India, which started as a movement opposing the displacement of people for the Sardar Sarovar dam but grew to more broadly question large dam projects and models of development requiring them. The document contrasts single-issue movements that have clear short-term leadership with longer-term movements addressing multiple issues like the environmental and women's movements. It defines pressure groups as organizations attempting to influence government policies without directly controlling political power, and provides some examples of popular movements in India.
Geog-water resources
Only 3% of water on Earth is freshwater, with over two thirds frozen in glaciers and polar ice caps. The document defines rainwater harvesting as collecting, storing and using rainwater from rooftops and other hard surfaces for landscape irrigation and other uses. It also describes watershed management as the sustainable management of water resources like supply, quality and drainage within a watershed boundary through planning, programs and projects.
Eco-sustainable development
Groundwater provides 40% of the nation's public water supply and is used by over 40 million people through domestic wells, making it an important source of drinking water in every state. It is also a major source of irrigation water and represents a principal reserve of freshwater and potential future water supply. Groundwater contributes significantly to stream and river flows and influences wetland habitats.
Bio-recycling of water
Water is essential for all life and covers 70% of the Earth's surface, mostly in oceans. 1.6% is found underground in aquifers, while a tiny amount exists in plants, animals, and manufactured goods. Water recycling decreases extraction from dwindling sources and pollution of sensitive ecosystems. It also creates and enhances wetlands while reducing pollutants at treatment plants. Recycled water has been safely used for industrial, agricultural, and household non-potable needs, and technological advances may enable indirect potable reuse.
Chem
Hard water is caused by dissolved minerals, mainly calcium and magnesium, that are picked up as water passes through soil and rock. It can interfere with cleaning tasks and leave films on fixtures. Permanent hardness cannot be removed by boiling and is caused by calcium and magnesium sulfates. While hard water does not pose health risks, it can cause nuisance problems like scale buildup and poor soap performance. Water becomes hard when it dissolves calcium and magnesium from geologic formations like limestone and dolomite during passage through the ground.
Bio
Water is essential for all life and covers 70% of the Earth's surface, mostly in oceans. 1.6% is found underground in aquifers, while a tiny amount exists in plants, animals, and manufactured goods. Water recycling decreases extraction from dwindling sources and pollution of sensitive ecosystems. It also creates and enhances wetlands while reducing pollutants at treatment plants. Recycled water has been safely used for industrial, home, and agricultural non-potable needs, and this reuse is growing. Advances in treatment and health studies may soon enable planned indirect potable water reuse.
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Phy-hydel power
- 2. INTRODUCTION… Hydroelectric power must be one of the oldest methods of producing power. No doubt, Jack the Caveman stuck some sturdy leaves on a pole and put it in a moving stream. The water would spin the pole that crushed grain to make their delicious, low-fat prehistoric bran muffins. People have used moving water to help them in their work throughout history, and modern people make great use of moving water to produce electricity.
- 4. ADVANTAGES… Fuel is not burned so there is minimal pollution Water to run the power plant is provided free by nature Hydropower plays a major role in reducing greenhouse gas emissions Relatively low operations and maintenance costs The technology is reliable and proven over time It's renewable - rainfall renews the water in the reservoir, so the fuel is almost always there
- 5. DISADVANTAGES… They use up valuable and limited natural resources They can produce a lot of pollution Companies have to dig up the Earth or drill wells to get the coal, oil, and gas For nuclear power plants there are wastedisposal problems