It does not produce green house gases or waste products. Tidal power is one of the major renewable energy sources, but also one of the most infantile. Ocean thermal energy conversion otec has become a serious contender for development as an economic power generation system for the last decade of this century, since the cost of conventional fuels particularly oil rose during and from 1973. What are the advantages and disadvantages of solar energy. Read on to find out more about the advantages and disadvantages of using water desalination plants. Ocean thermal energy conversion advantages and disadvantages. Darsonval first thought about the idea more than a century ago but it was only in early 1970 when research on this technology started to take shape. Dec 14, 2017 the energy is gained from the different temperature in the ocean. Advantages of geothermal energy 1 it is a renewable source of energy. Seawave energy and ocean thermal energy are the two forms in which solar energy manifests itself in oceans. Kulkarni department of mechanical engineering 201617.
Ocean thermal energy conversion otec and the pacific islands page 5 executive summary the idea of using thermal energy from the ocean is not new. A new hybrid ocean thermal energy conversionoffshore solar. The nonrenewable source of energy is easy to store. Advantages and disadvantages of geothermal energy january 24, 2019 pankaj mishra 3 comments geothermal energy is one of the significant forms of energy, but a lot of people dont know its importance.
Because energy is such a large portion of the total. Below are 12 uses of ocean thermal energy conversion that you can read about. Jul 04, 2015 however, actually being able to harness that energy is proving to be more challenging than it might seem. Electricity generation by the ocean thermal energy.
Marine energy systems advantages and disadvantages. Thermal energy is the energy that determines the temperature of matter. Ocean thermal energy conversion otec, form of energy conversion that makes use of the temperature differential between the warm surface waters of the oceans, heated by solar radiation, and the deeper cold waters to generate power in a conventional heat engine. Machines and technologies used to create ocean energy are expensive.
Renewable energy sources including biomass, geothermal, ocean, solar, and wind energy, as well as hydropower have a huge potential to provide energy services for the world. Ocean thermal energy conversion pros and cons vision. In the early days of airconditioning, electricity was plentiful and cheap, which enabled the building industry to provide almost all commercial buildings with comfort cooling. Advantages continuous sources of energy clean source of energy no emissions into the atmosphere does not add to thermal burden of the earth produces no healthdamaging air pollution or acid rain land can be sued to produce energy and grow crops simultaneously economical benefits local communities jobs, revenue. Once the technology is built, it doesnt require and more costs. However, actually being able to harness that energy is proving to be more challenging than it might seem. With renewable energy sources, this fossil fuels could be supplemented immediately and then eventually removed from the chain of supply. Ocean thermal energy conversion otec uses the temperature difference between.
Ocean thermal energy otec ocean thermal energy also called as ocean thermal energy conversion otec refers to a method of using the temperature difference between the deep parts of the sea which are cold and the shallow parts of the sea which are cold to run a heat engine and produce useful work. List five advantages and disadvantages of ocean thermal energy. Solar thermal electricity ste, also known as concentrating solar power csp, is a renewable energy technology that uses mirrors to concentrate the suns energy and convert it into hightemperature heat to. Cbse class 10 science sources of energy we will understand how the temperature difference between the water levels of the ocean can be used to generate electricity. Advantages and disadvantages of geothermal energy the. Wave energy conversion and ocean thermal energy conversion potential in developing member countries wave energy conversion wec and ocean thermal energy conversion otec are two potentially significant sources of renewable energy that are available to help the asian development banks adb. There have been long running debates about the advantages and disadvantages of nonrenewable energy sources. The system uses conventional power plants needing only small changes in design. As more steam is formed, it gets compressed at high pressure and comes out in the form of hot springs which produces geothermal power. One such source of energy is ocean thermal energy conversionotec. Strictly speaking nuclear power is also thermal energy fuel but it is set aside in a class of its own because of its unique.
The raw materials used to produce thermal power are fund or exhaustible resource. Using ocean generated energy sounds like an amazing advance for the human race and a great environmental help for the earth. Ocean thermal energy conversion otec uses the ocean thermal gradient between cooler deep and warmer shallow or surface seawaters to run a heat engine and produce useful work, usually in the form of electricity. Understanding the pros and cons of this alternative renewable energy source can help determine whether it is an option to meet future needs and demands in an environmentally friendly and safe way.
The advantages and disadvantages of desalination work to balance cost vs. If using tidal energy, it can only supply power for about 10 hours a day because of the pattern of the tides. Ocean thermal energy conversion otec is an energy technology that makes use of the oceans temperature difference between the warm surface water and the cold deeper water to drive a turbine connected to a generator to produce electricity. Chapter 11 renewable energy 767 executive summary renewable energy sources including biomass, geothermal, ocean, solar, and wind energy, as well as hydropower have a huge potential to provide energy services for the world. Ocean thermal energy conversion technology britannica. The amount of thermal energy that is lost by transporting the heat from the bottom of the well to the surface is minimal. Otec indeed has many advantages as it doesnt cause pollution at all. However like all power sources, thermal isnt perfect, and disadvantages. The governor of hawaii, david ige, flipped the switch to activate the plant. Construction of geothermal energy plants can affect the seismic stability to a large extent. Low efficiency of these plants coupled with high capital cost and maintenance cost makes them uneconomical for small plants. It can be installed at any place irrespective of the existence of coal. How it works and its mechanism to power generator advantages and disadvantages employment and labor labor increase no need of energy transmission energy derived from plants are nonrecyclable soil erosion air pollution dendro thermal power plant the process.
There is a small variation in power output from season to season. The process involved in ocean thermal energy, also known as ocean thermal energy conversion, has both benefits and disadvantages. The greater the temperature differential, the higher the efficiency of the heat engine. Bansilal ramnath agarwal charitable trusts vishwakarma institute of technology a seminar report on ocean thermal energy conversion by mr.
Ocean thermal energy conversion otec is a source of renewable energy wherein the temperature differential between deeper, colder water and warmer, shallow water is used to run a heat energy engine and produce electricity. Apr 21, 2017 marine energy has several types of energy, there are tidal energy, wave energy, ocean current energy, ocean thermal energy, and osmotic energy. Read the whole list of pros and cons here, and request free offers in the uk. But lets look at geothermal energy advantages and disadvantages and more geothermal energy basics for a deeper dive. Ocean thermal energy conversion otec, which produces clean baseload 247 renewable energy and fresh drinking water was a perfect match for our venture fund. They dont require much maintenance, and will last longer than tradition power plants. Energy costs account for onethird to onehalf of the total cost of producing desalinated water. Cooler deep water then cools the system and the cycle continues.
I have been following a post on wiki answers for a while on the advantages and disadvantages to solar power and wanted to share the results. Ocean thermal energy conversion systems slideshare. The following are many of the advantages and disadvantages of using wave power as an energy source. As more drought and famine issues impact our planet because of global warming, these key points are going to become essential to.
The world oceans harness enough thermal and mechanical energy to meet and exceed global energy demands, however a relatively small amount of renewable energy research has focused on utilizing ocean energy. Ocean thermal energy is that the energy obtained from the ocean thanks to the distinction in temperature of the water at completely different depths of the ocean sea. We would like to show you a description here but the site wont allow us. Ocean energy would help but there are also some drawbacks to using this type of renewable energy. Only a small variation in output takes place from season to season. Ocean thermal energy conversion otec types renewable energy. A longer, 14minute introduction that includes details of lockheeds otec plant in hawaii and how it was tested. One of the most exciting options is ocean thermal energy conversion. What are the advantages and disadvantages of thermal energy. Ocean thermal energy conservation pdf ocean thermal energy conversion otec generates electricity indirectly from solar energy by harnessing the temperature difference between the sunwarmed. Wave energy conversion and ocean thermal energy conversion. An ocean thermal energy conversion power plant built by makai ocean engineering went operational in hawaii in august 2015. Introduction, principles of ocean thermal energy conversion otec, ocean thermal energy conversion plants, basic rankine cycle and its working, closed cycle, open cycle and hybrid cycle, carnot cycle, application of otec in addition to produce electricity, advantages, disadvantages and benefits of otec.
A solid is caused by a strong attraction between the molecules in which it is composed of. Advantages and limitations of ocean thermal energy conversion. What are the advantages and disadvantages of using ocean power as an energy source. Looking into the benefits or limitations of otec will help us to deduce whether this form of energy production is economical or not. Advantages and disadvantages of geothermal energy the source of renewable heat. There is an abundance of greenhouse gases below the surface of the earth, some of which.
Together, the warm ocean surface and the cool deep water can generate heat. In simple words we can say, the system is independent of weather. A lot of energy is required for the entire process. A basic 4minute introduction from offshore infrastructure associates, inc, with good animations, based on puerto rico as an example location. There are four thermal energy fuels, coal, natural gas, wood waste and geo thermal. Since that time, we have been actively involved in ote, commercializing otec around the world. Thermal energy storage tes is a technology that stocks thermal energy by heating or. No ion particles can be allowed to enter through the semipermeable membrane.
In general, the advantages of geothermal are superior to the disadvantages. The low energy conversion efrciency of otec means that more than 90% of the thermal energy extracted from the oceans surface is wasted and must be rejected to the cold, deep sea water. Once the turbines have been installed, no direct greenhouse gas ghg gas with physical properties that cause the earths atmosphere to warm up. Paper presentation on ocean thermal energy presented by department of mechanical engineering. One of the greatest advantages of geothermal energy is that is an ecofriendly, renewable energy source that can reduce your utility costs up to 50%. As a result, comfort cooling is standard in almost all of todays commercial buildings.
Marine energy has several types of energy, there are tidal energy, wave energy, ocean current energy, ocean thermal energy, and osmotic energy. Ocean thermal energy conversion otec types renewable. This is the first true closedcycle ocean thermal energy conversion otec plant to be connected to a u. It is a clean and pollution free renewable source of energy. In general, both photovoltaic solar energy and, above all, solar thermal energy has a very good acceptance in society.
Apr 11, 2015 ocean thermal energy conversion systems 1. It can produce simultaneously the desalinated water and nutrients for agriculture. Advantages and disadvantages of ocean thermal energy. These elements can be formed as a solid, liquid, and gas. Welcome to presentation on seminar topicwelcome to presentation on seminar topic ocean thermal energy conversionocean thermal energy conversion otecotec govt. Otec plants takahashi and trenka, 1992 are in fact solar energy plants, because they exist of a solar heat collecting surface the upper layer of the ocean, thermal storage the upper layer of the ocean and a thermal power cycle that runs on a temperature difference. Below is the definition the five types of marine energy, how it works, and the advantages as well as disadvantages of each energy. Due to small temperature difference in between the surface water and deep water, conversion efficiency is very low about 34%. We list below the main advantages of geothermal energy. Ocean thermal energy conversion ocean thermal energy conversionocean thermal energy conversion otec is a gamechanging technology that leverages the temperature read more. The endless flows create reliability of the future energy availability. In order to help you to get your bearings with these debates, below you will find an overview of the main advantages and disadvantages of nonrenewable energy. Power developed is continuous and it is independent of weather. All elements in the periodic table can occur in 3 different states.
The sun warms the surface water and wave motion mixes it to the downward from the deep cold water, formed at high latitudes, by a thermocline. If harvested in small amounts it may be considered to have no impact at all, but if it gets to be too explored it may change local ecosistems by. Discuss the advantages and disadvantages of otec system. Solar energy is an inexhaustible and unpolluting source of energy compared to petroleum, natural gases and fossil fuel coals which makes it of the greats advantages of solar energy. The output generated from ocean thermal energy shows very little seasonal or daily variation electric power generated can also be used to produce hydrogen. Read this article to learn about the advantages and disadvantages of thermal power. The discussion started a while ago and has had a lot of feedback.
Thermal energy can be used in generating electricity nonpolluting, so doesnt cause global warming. Even though there are lesser emissions, digging deep holes causes seismic disturbances which have led to earthquakes. Thermal energy can be used almost directly like in power generation steam. A greater advantage of the ocean thermal energy is that it can be used continuously for 24 hours throughout the year. Ocean thermal energy conversion otec is a source of renewable energy wherein the temperature differential between deeper, colder water and warmer, shallow water is used to run a heat energy. Less initial cost as compared to other generating plants. What are the advantages and disadvantages of ocean thermal. Nonrenewable energy cannot be replaced once their energy source is used up. With todays rising power demands, geothermal power plants are attractive options for their cheap, environmentallyfriendly energy production.
Nonconventional sources of energy are turning out to be extremely important sources of energy for mankind. Ocean thermal energy conversion the large ocean surface acts as a reservoir of solar energy. Otec is one of the various green energy sources gaining a presence in some of our countries. Perhaps the most important of these is that it produces fresh water as a byproduct. Solar energy can be turned into electricity or used in many other forms.
Otec can operate with a very high capacity factor and so can operate in base load mode. Ocean thermal energy conversion otec and the pacific islands. However, it is convenient to know the advantages and disadvantages of solar energy to reinforce or contrast our opinion when we talk about energy sources, most people are positioned in favor or against a certain type solar energy, nuclear energy, wind. A chp system by helec is an integrated cogeneration system that harnesses and uses the thermal energy produced in. What are the advantages and disadvantages of using thermal. How will ocean thermal energy conversion help the environment. Pdf on oct 10, 2016, sawsan ahmed elhouri and others published 70. Unlike wind, solar and other ocean energy sources such as wave power, tides and ocean currents are almost 100 percent predictable. In an opencycle system, when the surface water is vaporised, it precipitates out all of its salt, so once the vapour is condensed again it is drinkable. Hot springs are just one example of this naturallyoccurring thermal energy. It is the most efficient energy of all renewable energies.
Outline of the 100 kw otec pilot plant in the republic of nauru pdf. The advantages of using ocean power as an energy source is that it is renewable and widely available. Ocean thermal energy conversion otec uses warm surface water to produce steam using either ammonia or a vacuum to generate electricity. One of the primary advantages of thermal power is that the generation costs are extremely low. No fuel is needed to generate the power, and the minimal energy needed to pump water to the earths surface can be taken from the total energy yield. Thermalpower plants are not environment friendly and plants emits toxic pollutants like ash, carbon dioxide and sulphur dioxide. Enough electricity is produced to drive the pumps and the excess is exported to the grid.
Ocean thermal energy conversion otec is a method of generating energy that uses the temperature differences between warm surface water and colder deep seawater to produce energy. With global warming a certainty, it is imperative that we turn to nonpolluting and renewable sources of energy. To understand geothermal energy, imagine having a fireplace nearby, one which never goes out. There are many different technologies that allow for energy production from the ocean, such as generating energy from waves, tides, and ocean temperatures. Ocean thermal energy is a renewable source of energy and its use does not cause any pollution.
What are the advantages of using ocean thermal energy. Between now and the 1990s there is a requirement to. Introduction to disadvantages of thermal energy thermal generation refers to the process of the generating electricity from heat energy. The cold water pumped in the otec plant can be used for other things such as air conditioning and refrigeration disadvantages of using ocean thermal energy. Now lets discuss advantages and disadvantages of geothermal energy. Solar power is pollution free and causes no greenhouse gases to be emitted after installation. There are several great advantages to ocean thermal energy. Maintenance can be done when the machine is still operational. Energy from the sun heats the surface water of the. What are the advantages and disadvantages of thermal power.
Otec ocean thermal energy conversion principle your. Ocean thermal energy conversion produces energy from temperature differences in ocean waters. The ocean works as a huge storage device for thermal energy. Advantages and disadvantages of wave power greentumble. Advantages and disadvantages of thermal power sciencing. What are the advantages and disadvantages of geothermal energy. Geothermal energy pros and cons energy informative. Advantages and disadvantages of reverse osmosis biotech. Disadvantages of thermal energy study science online. Geothermal energy is more environmentally friendly than conventional fuel sources such as coal and other fossil fuels. The fire we speak of exists at the core of our planet.
1035 690 1032 168 1032 651 1200 957 507 1482 103 393 1388 155 394 806 1203 394 688 1471 589 925 1081 432 781 387 1067 124 104 669