Greenhouse gas data, voluntary reporting, electric power plant emissions. Since you presumably wish to recover the solids this would be easier from a flat spread out tray than from a tank. He serves currently as the editor of Earth and life sciences—covering climatology, geology, zoology, and other topics that relate to the... An example of the closed-cycle ocean thermal energy conversion (OTEC) process. Thanks. You need to be a member in order to leave a comment. And thank you for the compliment. Ocean thermal energy conversion produces energy from temperature differences in ocean waters. Is there a way to determine the time it would take to boil an amount of water when you only have a temperature? Cleaning such a tank is much easier. Maps, tools, and resources related to energy disruptions and infrastructure. (The cost of coal-generated electricity is estimated at 4–8 cents per kilowatt-hour.). It looks as though our timezones clash but never mind we will get there. Further, in order to maximise heat transfer you would need thin walled, thermally conductive duct material. We have placed cookies on your device to help make this website better. The United States became involved in OTEC research in 1974 with the establishment of the Natural Energy Laboratory of Hawaii Authority. Welcome to OnlineConversion.com. Let us know if you have suggestions to improve this article (requires login). Since that time researchers have continued developmental work to improve heat exchangers and to devise ways of reducing corrosion of system hardware by seawater. Open-cycle and hybrid processes have been used in seawater desalination, and OTEC infrastructure allows access to trace elements present in deep-ocean seawater. His idea called for a closed-cycle system, a design that has been adapted for most present-day OTEC pilot plants. Firstly I will apologies if this is in the wrong place, the question I have falls under thermodynamics (maybe) but I'm working on an engineering project. Yes the water could be pressurised to raise the temperature, or the transfer fluid could be steam or oil or a commercial high temperature 'refrigerant' such as you find in heat pumps. This temperature difference can be used to produce electricity and to desalinate ocean water. International energy information, including overviews, rankings, data, and analyses. Energy - Conversion In physics, energy is an indirectly observed physics quantities, also is one of the basic quantitative properties that describes the object's state or a physics system. It has been estimated that the tropical ocean waters absorb solar radiation equivalent in heat content to that of about 250 billion barrels of oil each day. I was hoping that there would be a simple way if you could say the temperature is a constant then you would be able to calculate how long it would take. In addition, hydrogen can be extracted from water through electrolysis for use in fuel cells. In fact is is a real pleasure to have a pleasant, intelligent and productive conversation rather than a dispute with some troll. Includes hydropower, solar, wind, geothermal, biomass and ethanol. The prospects for commercial application of OTEC technology seem bright, particularly on islands and in developing countries in the tropical regions where conditions are most favourable for OTEC plant operation. Other larger OTEC systems are in development or planned in several countries, mostly to supply electricity and desalinated water for island communities. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. Omissions? U.S. Energy Information Administration, 1000 Independence Ave., SW, Washington, DC 20585, Biofuels: Ethanol and Biomass-based diesel, Residential Energy Consumption Survey (RECS), Commercial Buildings Energy Consumption Survey (CBECS). The difference in temperature between the surface and the lower water layer can be as large as 50 °C (90 °F) over vertical distances of as little as 90 metres (about 300 feet) in some ocean areas. In the first decade of the 21st century, the technology was still considered to be experimental, and thus far no commercial OTEC plants have been constructed. It may be beneficial to blow the water vapour away with a fan to assist speed up evaporation. Copyright © ScienceForums.Net I know its not 100% efficient but its just a theoretical assumption that I'm looking for. Is this clean water or does it contain chemicals or other material that would need residue removal? Floating facilities may be more feasible than land-based ones, because the number of land-based sites with access to deep water in the tropics is limited. Many different energy equivalents to convert between. You can get an idea how much heat might be available by multiplying the calorific value of the fuel gas by the usage rate of the burner. Reserves, production, prices, employment and productivity, distribution, stocks, imports and exports. The resultant steam is expanded through a low-pressure steam turbogenerator to produce electric power. Cold seawater is used to condense the steam, and a vacuum pump maintains the proper system pressure. This information was copied from the rec.food.cooking FAQ. Heat transferred from the warm surface ocean water causes the working fluid to vaporize through a heat exchanger. Warm surface water is pumped through an evaporator containing a working fluid. I hope you understood the first one about need to leave some energy for the exit kinetic energy of the gas. Our editors will review what you’ve submitted and determine whether to revise the article. Remember power = rate of doing work = energy per second. This is where the engineering decisions and trial calculations come in. Forms EIA uses to collect energy data including descriptions, links to survey instructions, and additional information. Is there a way to determine the time it would take …

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