Last edited by Jutaxe
Friday, January 31, 2020 | History

2 edition of Scaling Considerations for the Ocean Thermal Energy Conversion (OTEC) Cold Water Pipe at-Sea Test Program found in the catalog.

Scaling Considerations for the Ocean Thermal Energy Conversion (OTEC) Cold Water Pipe at-Sea Test Program

L. Kahn

Scaling Considerations for the Ocean Thermal Energy Conversion (OTEC) Cold Water Pipe at-Sea Test Program

  • 308 Want to read
  • 29 Currently reading

Published by National Oceanic and Atmospheric Adminis .
Written in English


Edition Notes

StatementKahn, L.
The Physical Object
Pagination23 p. $0.00 C.1.
Number of Pages23
ID Numbers
Open LibraryOL17586258M

Many buildings located on the coast use this energy source for heating in winter and air conditioning in summer. The complications are essential to get net power out, otherwise the auxillary systems use all the power produced. Infor example, amibitious plans to construct a 16MW offshore OTEC plant in Martinique were shelved indefinitely following major technical difficulties with the coldwater inlet pipe. Laminaria digitata is dominant the upper sublittoral. Although OTEC plants are only suitable for tropical seas with relatively large temperature gradients, that's less of a problem than it sounds. In the s, another Frenchman, Georges Claude, experimented with power generation using the temperature differential between warmer surface waters and cooler deep layers.

I strongly oppose this suggestion. Trekphiler29 September UTC By limited geographical area I'm pretty sure they are referring to the fact that this only works if the temperature difference between the cold deep sea water and the warm sea water is high enough, which limits the geography of OTEC to tropical climates. Sea-based OTEC plants are essentially the same but have to be constructed on some sort of tethered, floating platform, not unlike a floating oil platform, with the four pipes running down into the sea; early prototypes were run from converted oil tankers and barges. A turbine in a hydroelectric dam for example is an open system that uses a turbine that is not a heat engine. The floating plants would appear as dots on the horizon, several miles out to sea. Marine turbine designers must take into account reversing flows, cavitation, and harsh underwater conditions salt corrosion, debris, etc.

Laminaria saccharinaHalidrysChondrus and or Furcellaria. Next year, if all goes well, construction will begin on the first commercial ocean thermal plant, a one-megawatt operation at the Natural Energy Laboratory of Hawaii Authority on the island of Hawaii. Of course there would be no such effects from only a few such power plants, but the effects should be visible if this technology would be used on a large scale. This is a valuable, well-researched look at a fascinating technology. OTEC powerIn physics, power is the amount of energy supplied by a system per unit time.


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Scaling Considerations for the Ocean Thermal Energy Conversion book

The book is orientated to the practical solutions that this new industry has found so far and the problems that any device needs to face.

And if you are extremely efficient in the Gulf of Mexico you might just reduce the incidence of damaging hurricanes. Sea-based OTEC plants are essentially the same but have to be constructed on some sort of tethered, floating platform, not unlike a floating oil platform, with the four pipes running down into the sea; early prototypes were run from converted oil tankers and barges.

The problem most of the engineers I've researched cite is the exponentially lowering heat transfer rate per volume of heat transfer fluid as you enlarge a Cylinder bore or Displacer.

The bottom of the wheel sits in the surface water, and deep water from far enough down to be cold is pumped to the top of the wheel to cool it. This should make the course more exciting and more challenging. What advantages does an OTEC supply to aquaculture?

The floating plants would appear as dots on the horizon, several miles out to sea. Under current economic conditions, OTEC plants are most likely to be constructed in or near small tropical islands that have little or no energy resources of their own, a high-dependence on expensive, imported oil, and perhaps a pressing shortage of freshwater as well; a combined OTEC power and desalination plant could be very attractive in that situation.

Also, kelp grows best in cold water, so bringing cold water towards the surface would be good for shallow-water kelp farming in warm areas. From memory is much as you say, the oceans are too big and replenishing too fast for anythign less than tens of thousands of these to even have any noticable impact.

How working fluid gets around a simplified closed-cycle ocean thermal energy conversion system. In a third pipe, cold water is pumped up from the ocean depths. All in all I cannot see that there is a danger of heating, quite to the contrary.

Wave Given the early stage of development, costs of wave energy are still prohibitively high [Lewis et al. Its heat exchanger design uses propylene as the working fluid and a turbulent-flow process inspired by refrigeration techniques, says president Robert Nicholson.

Laminaria and Saccorhiza polyschides and small algae common in the sub-littoral.

OTEC (ocean thermal energy conversion)

And how long you could run the entire world on the amount of power you'd generate doing it? Water from colder seas can also be used for heating and air conditioning.

These are two distinct processes. The steam drives a turbine and generates electricity as in closed-cycle OTECbefore being condensed back to water using cold water piped up from the ocean depths. Trekphiler29 September UTC By limited geographical area I'm pretty sure they are referring to the fact that this only works if the temperature difference between the cold deep sea water and the warm sea water is high enough, which limits the geography of OTEC to tropical climates.

Most of the energy generated from tidal power came from tidal barrages across bays and estuaries [REN21, ]. OTEC technology has a slightly high initial cost but a low operational cost and most importantly, has no cost of the seawater itself, other than the cost of building the OTEC system itself which delivers the seawater through a large pipe.

The Indian Ocean? One important and often overlooked impact of OTEC is that pumping cold water from the deep ocean to the surfaces releases carbon dioxide, the greenhouse gas currently most responsible for global warming.Shareable Link. Use the link below to share a full-text version of this article with your friends and colleagues.

Learn sylvaindez.com by: Non-conventional sources of energy are turning out to be extremely important sources of energy for mankind. With global warming a certainty, it is imperative that we turn to non-polluting and renewable sources of energy.

One such source of energy is Ocean Thermal Energy Conversion(OTEC). The first known Ocean Thermal Energy Conversion (OTEC) system was proposed by a French Engineer Jacques Arsene d’Arsonval, in (Takahashi and Trenka, ). Recognizing the tropical oceans as a potential source of energy, through the natural temperature differences between the ocean’s surface water and deep water.

Oct 05,  · Abstract: Design of an ocean thermal energy conversion (OTEC) power plant needs a local thermal condition evaluation, in order to satisfy the constructional limits as well as economical considerations. In this paper, performance of 10 MW, 50 MW, and MW OTEC power plants in locations with surface water temperature between 22 °C to 28 °C has been investigated and the.

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.

The advantages of wave energy harvesters outnumber the advantages of other ocean energy harvesting methods such as tidal power, ocean thermal energy conversion (OTEC), and saline mechanisms. Waves are abundant in all areas throughout the ocean, making them more useful in energy harvesting than tides.