Ocean thermal energy conversion otec types renewable energy. View ocean thermal energy conversion research papers on academia. Noaa office for coastal management about the office. An ocean thermal energy conversion otec is a system of converting thermal energy in electricity by using the temperature difference between warm water at the surface of the ocean and cold water. The united states is developing four ocean energy technologies which offer significant promise. Ocean thermal energy conversion karen anne finney university of guelph, guelph, ontario, n1g 2w1, canada ocean thermal energy conversion otec is a process that employs the natural temperature difference between the surface and the depths of the ocean. The governor of hawaii, david ige, flipped the switch to activate the plant. The suns heat warms the surface water a lot more than the deep ocean water, which creates the oceans naturally available temperature gradient, or thermal energy. For this process to work there must be at least a 20 degree celsius 36 degree fahrenheit difference between surface water and deep seawater. Ocean thermal energy conversion simple english wikipedia. Get ocean electricity seminar report and ppt in pdf and doc. Ocean thermal energy conversion is a technology that converts thermal energy into electricity. Ocean thermal energy heat exchanger energy conversion.
Otec can be used to generate electricity, desalinate water, support deepwater mariculture, and provide refrigeration and air conditioning as. The warm seawater vaporizes the fluid in the heat exchanger which then turns the turbines of the generator. Wave energy conversion and ocean thermal energy conversion potential in developing member countries. Ocean thermal energy conversion research papers academia. Technical readiness of ocean thermal energy conversion otec. This constancy differs from the output of renewable resources such as wind and wave energy that sometimes produce intermittent electricity. Ocean thermal energy conversion otec is an energy technology that converts solar radiation to electric power. Ocean thermal energy conversion otec is a technology that dates back to the late 1800s and makes use of temperature differences between surface and deep ocean waters to drive a heat engine, and extract energy via the rankine cycle. Otec can operate with a very high capacity factor and so can operate in base load mode the denser cold water masses, formed by ocean surface water interaction with cold atmosphere in.
Energy and exergy analyses are reported of hydrogen production via an ocean thermal energy conversion otec system coupled with a solarenhanced proton exchange membrane pem electrolyzer. Also get the seminar topic paper on ocean electricity with abstract or synopsis, advantages and disadvantages, presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2016 2017. Bansilal ramnath agarwal charitable trusts vishwakarma institute of technology a seminar report on ocean thermal energy conversion by mr. Presently almost of all the energy depends on fossil fuels and nuclear power. Jan 22, 2017 introduction ocean thermal energy conversion otec is a process that can produce electricity by using the temperature difference between deep cold ocean water and warm tropical surface water. Thermal energy due to temperature gradient between sea surface and deepwater can be harnessed using different ocean thermal energy conversion otec processes. Otec systems use the oceans natural thermal gradientthe fact that the oceans layers of water have different temperatures to drive a powerproducing cycle.
Ocean thermal energy conversion otec is a means of converting into useful energy the temperature difference between surface water of the oceans in tropical and subtropical areas, and water at a depth of approximately 1 000 meters which comes from the polar regions. New idb report on ocean energy potential in barbados the interamerican development bank idb has published a report on the potential of ocean energy in barbados. Ocean thermal energy conversion linkedin slideshare. The report also included cost estimates for other plants ranging from 10 to 100 mw. Geothermal energy, tidal energy, wave energy, and ocean thermal energy 597 geothermal resources should, in general, have three important characteristics, as shown in figure 11. Otec plants pump large quantities of deep cold seawater and surface seawater to run a power cycle and produce electricity.
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. Renewable, clean and reliable power for energy needs of today and tomorrow. Tropical and subtropical regions where the water temperature at the ocean surface is relatively high are best suited for its use. Otec is an energy technology that converts solar radiation to electric power. Ocean thermal energy conversion factors which are extremely intermittent. Otec utilizes the worlds largest solar radiation collector. Otc 21016 economics of ocean thermal energy conversion. Ocean thermal energy, ask latest information, ocean thermal energy abstract,ocean thermal energy report,ocean thermal energy presentation pdf,doc,ppt,ocean thermal energy technology discussion,ocean thermal energy paper presentation details,ocean thermal energy, ppt, pdf, report, presentation, source code, abstract, seminar, project idea, seminar topics, project, project topics,latest. Cost effective otec ocean thermal energy conversion. Otec, or ocean thermal energy conversion, is an energy technology that converts solar radiation to electric power. The major funding emphasis has been in otec because of its potential, state of development, and availability of the resource to u. Here youll find a collection of information on this historic project, as well as information on otec technology, news, and posts from facility staff.
Ocean thermal energy conversion renewable energy caribbean. The technical evaluation of nonelectrical carriers lead, for example, to the consideration of hydrogen produced using electricity and desalinated water generated with otec technology. The stored thermal energy in the top meter depth is more than two years of delivered solar energy, at 100 % conversion efficiency, the stored energy is sufficient for 10,000 years of human use. The 1992 report also provided estimates for landbased 1 mw open cycle plants with and without secondstage desalinated water production as well as a plant with a system including the use of 90 kgs of 6c cold seawater as the chiller fluid for a. First introduced in 1881, otec has been described as an effective and renewable energy source. Otec systems must be designed with regard to potential efficiency issues. 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. Introduction energy, water and food are some of the essential requirements for the continuation and evolution of mankind.
Pdf the ocean thermal energy conversion strategies and. Warm seawater is taken in from the surface of the oceans and cold water from the deep at 5 o. In order to produce power with the low temperature range, a working fluid with low boiling point is used. Otec ocean thermal energy conversion systems use the ocean s natural thermal gradient the fact that the ocean s layers of water have different temperatures to drive a powerproducing cycle. Explore ocean electricity with free download of seminar report and ppt in pdf and doc format. Ocean thermal energy conversion engineering seminar topics. Ocean thermal energy conversion power plantocean thermal. Ocean thermal energy conversion otec types renewable. Wave energy conversion and ocean thermal energy conversion. Otec news reports on ocean thermal energy conversion, seawater air conditioning and related technologies. Salinity gradient conversion exploits the difference between salinity of fresh water and salt water, or salt. Ocean thermal energy conversion engineering seminar. Heat extraction from coldwater sink to condense the working fluid in the condenser. These have been extrapolated to present day costs and included in table 2 below.
The united states is developing four oceanenergy technologies which offer significant promise. Ocean thermal energy conversion otec is a process that can produce electricity by using the temperature difference between deep cold ocean water and warm tropical surface waters. Ocean thermal energy conversion otec is a way of getting useful energy from the worlds oceans. What is otec ocean thermal energy conversion otec is a marine renewable energy technology that harnesses the solar energy absorbed by the oceans to generate electric power. Ocean thermal energy conversion eliminates the heat collector, and provides steady power, but has practical issues and tends to be in distant locations. However, many of the key issues of ocean renewable energy do not involve the technology of the conversion devices, but how ocean renewable energy sources relate to the overall system of energy, the environment, public policy and the practical and business issues of introducing such radical new systems into. An overview of ocean renewable energy ascension publishing. Otc 21016 economics of ocean thermal energy conversion otec. Ocean thermal energy conversion act oteca of 1980 limits the ownership, construction and. Ocean thermal energy conversion otec is a process that employs the natural temperature difference between the surface and the depths of the ocean. Ocean thermal energy conversion otec makes use of the temperature differences between the deep cold and relatively warmer surface waters of the ocean to generate a constant, clean source of electricity. Otec energy could be transported via chemical, thermal, and electrochemical carriers. Technical readiness of ocean thermal energy conversion.
The ideal conversion efficiency is energy converted to electricity divided by thermal energy input at the evaporator and is 65. Jun 11, 2018 ocean thermal energy is a electrical energy produced by using the temperature difference between deep cold ocean water and warm tropical surface waters. This is surprising since otec seems to be especially wellsuited for remote. Ocean thermal energy is a electrical energy produced by using the temperature difference between deep cold ocean water and warm tropical surface waters. An ocean thermal energy conversion power plant built by makai ocean engineering went operational in hawaii in august 2015. Solar power, for example, can only generate electricity when there is. Otec system application ocean thermal energy conversion otec systems have many applications or uses. Closed cycle ocean thermal energy conversion systems use a working fluid with a low boiling point, ammonia for example, and use it to power a turbine to generate electricity.
Join us in exploring this exciting path into the future. The wave energy converter wec is a new, highly efficient technology that harnesses the immense, renewable energy contained in ocean waves. Ocean thermal energy conversion otec technology uses a turbine generator to create renewable energy from the temperature difference between cold, deep seawater circulating in the ocean and surface seawater warmed by the sun. At the mouths of rivers where fresh water mixes with saltwater, energy associated with the salinity gradient can. 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. 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. Ocen thermal energy conversion, closed rankine cycle, uehara cycle, heat exchanger, dow 1. The otec power plant with well designed real turbineinductor probably can achieve close to 5 % energy conversion efficiency. This is the first true closedcycle ocean thermal energy conversion otec plant to be connected to a u. Ocean thermal energy conversion our oceans cover over 70% of the globes surface.
Otec ocean thermal energy conversion systems use the oceans natural thermal gradient the fact that the oceans layers of water have different temperatures to drive a powerproducing cycle. Ocean electricity seminar report, ppt, pdf for mechanical. Ocean thermal energy conversion makai ocean engineering. Ocean thermal energy conversion technology britannica. 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. Its unique ability to extract and convert energy from both the rising and falling of waves, represents a technological breakthrough. Kulkarni department of mechanical engineering 201617.
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