[PDF] [PDF] Ocean Thermal Energy Conversion (OTEC) Technology





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[PDF] Ocean Thermal Energy Conversion (OTEC)

OTEC offers one of the most benign power production technologies since the handling of hazardous substances is limited to the working fluid (e g ammonia) 



[PDF] Ocean Thermal Energy Conversion (OTEC) Technology

Ocean Thermal Energy Conversion (OTEC) is a technology for generating renewable energy that uses the temperature differential between the deep cold and 



[PDF] OCEAN THERMAL ENERGY CONVERSION (OTEC)

State of the Technology OTEC power systems operate as cyclic heat engines They receive thermal energy through heat transfer from surface sea water warmed 



[PDF] Ocean Thermal Energy Technology Brief - IRENA

» Process and Technology Status – Ocean Thermal Energy Conversion (OTEC) technologies use the temperature difference between warm seawater at the surface of 



[PDF] Ocean Thermal Energy Conversion (OTEC) - OAPEN

human engineering and Mother Nature This book shares state-of-the-art OTEC technology especially from the 7th Ocean Thermal Energy Conversion (OTEC)



[PDF] ocean thermal energy conversion (otec) and Derivative technologies

ocean thermal energy conversion (otec) and Derivative technologies: Status of De- velopment and prospects Gérard c nihous hawaii natural Energy Institute 



[PDF] Ocean thermal energy conversionpdf

The unit cost of 100 MW OTEC plant in Indian conditions is calculated as Rs 2 93/kWh (fig 4) These three ocean energy forms are in a stage of technology 



[PDF] OCEAN THERMAL ENERGY CONVERSION (OTEC

published and reviewed as the "Ocean Thermal Energy Conversion (OTEC) Draft In preparing this initial Environmental Analysis of OTEC technology

Ocean Thermal Energy Conversion (OTEC)

Technology

Ocean Thermal Energy Conversion (OTEC) is a technology for generating renewable energy that uses the

temperature differential between the deep cold and relatively warmer surface waters of the ocean to generate baseload

electricity. The technology is viable primarily in equatorial areas of the earth where the year round temperature

continuously requires large volumes of both warm and cold water to generate electricity. A 100 megawatt (MW) OTEC

facility would likely require 10-20 billion of gallons of water per day. There are several types of OTEC systems; this

document describes the most likely initial commercial OTEC facility: an offshore, closed-cycle system.

Closed-Cycle OTEC Power System:

OTEC is a heat engine system with a heat

source (i.e., warm water) and a heat sink (e.g., cold water). The warm water passes through a heat exchanger (i.e., evaporator) which is in contact with a closed loop of working fluid (likely ammonia). The warm water evaporates the working fluid into a vapor which expands and drives a turbine. The turbine, connected to a generator, is the source of mechanical energy. The generator converts the mechanical energy into electrical energy. After the vaporized working fluid passes through the turbine and generator it enters another heat exchanger (i.e., condenser) which is in contact with the cold water. The vaporized working fluid is condensed back into a liquid which is then pumped back into the evaporator to complete the cycle. Both the cooled warm water and the warmed cold water are discharged into the ocean after they have passed through the heat exchangers. Figure 1 is a schematic of the closed-cycle system.

Cold Water Pipe:

A unique feature of an OTEC facility is the

cold water pipe. The pipe must be able to withstand the rigors of the marine environment in order remain attached the OTEC platform. In order to obtain the temperature differential required for

withdraw cold water at a depth of approximately 3300 feet (1000 meters). To accommodate the large cold water flows,

the size of the pipe for a 100 MW facility may be approximately 33 feet (10 meters) in diameter. The construction,

deployment, and installation of the cold water pipe have remained an engineering challenge.

Other System Features:

A surface platform is an integral part of the facility which is necessary to house the equipment required for the

OTEC system. A stationary OTEC platform would be held in place by mooring lines and anchors. An OTEC platform may

be visible from the shoreline. A power cable lying upon or beneath the ocean bottom would connect the electricity from

the off-shore facility to the electrical grid.

Other OTEC Products

OTEC technology has the potential to be integrated with other commercial systems (e.g., aquaculture and sea

water air conditioning) and products (e.g., potable water, ammonia, and hydrogen).

Figure 1. Schematic of an offshore

closed-cycle OTEC systemquotesdbs_dbs46.pdfusesText_46
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