Tidal Energy Systems Overview
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Questions and Answers

Which factor directly influences the potential energy available for electricity generation in a tidal range power plant?

  • The tidal range (correct)
  • The size of the electrical generators
  • The design of the sluice gates
  • The depth of the turbines

    • What is the primary function of the sluice gates in a tidal barrage?

  • To enhance marine life in the estuary
  • To increase water depth in the lower basin
  • To generate electricity directly
  • To control the flow of water between basins (correct)

    • In Ocean Thermal Energy Conversion (OTEC), what role does the cold seawater play?

  • It acts as the main energy source for vaporization
  • It condenses the vaporized low-boiling-point fluid back into liquid (correct)
  • It directly generates electricity through turbines
  • It increases the temperature of the working fluid

    • Which OTEC system utilizes seawater as the working fluid in a low-pressure chamber?

    <p>Open-Cycle OTEC</p> Signup and view all the answers

    What must be considered to minimize ecological impacts of tidal power plants?

    <p>Conducting thorough environmental assessments</p> Signup and view all the answers

    What is the primary advantage of using a two-basin tidal power plant design?

    <p>It allows for better control over water flow.</p> Signup and view all the answers

    How does tidal power compare to other renewable energy sources in terms of output predictability?

    <p>Tidal power offers predictable and reliable electricity.</p> Signup and view all the answers

    Which element is essential for the efficient operation of turbines in a tidal power plant?

    <p>Effective control systems</p> Signup and view all the answers

    What is the effect of basin size on the operation of a tidal range power plant?

    <p>Larger basins allow more water to be stored and released.</p> Signup and view all the answers

    Which factor limits the efficiency of power generation in a tidal power plant?

    <p>The efficiency of the turbines</p> Signup and view all the answers

    What distinguishes single basin tidal plants from two basin tidal plants?

    <p>Single basin plants harness kinetic energy, while two basin plants exploit potential energy.</p> Signup and view all the answers

    Which statement about tidal stream generators is accurate?

    <p>They resemble underwater wind turbines and are placed on the seabed.</p> Signup and view all the answers

    What is a key operational feature of tidal kite systems?

    <p>They move in a figure-eight pattern propelled by tidal currents.</p> Signup and view all the answers

    What is one advantage of utilizing tidal range power plants?

    <p>They have a high potential for energy generation due to significant tidal range.</p> Signup and view all the answers

    How do two-basin tidal power plants primarily generate electricity?

    <p>By utilizing the difference in water levels between high and low tides.</p> Signup and view all the answers

    What is a defining characteristic of tidal stream generators compared to conventional turbines?

    <p>They capture energy from moving water currents rather than static water pressure.</p> Signup and view all the answers

    Which of the following accurately reflects a disadvantage of tidal power?

    <p>Tidal plants require large upfront fees for technology installation.</p> Signup and view all the answers

    What describes the operational principle of tidal range power plants?

    <p>They use sluice gates to manage incoming and outgoing water flow.</p> Signup and view all the answers

    In what way do tidal kite systems offer advantages over traditional tidal generators?

    <p>They adapt better to varying tidal currents and are easier to maintain.</p> Signup and view all the answers

    What is a key engineering challenge faced by OTEC systems?

    <p>Corrosion and bio fouling</p> Signup and view all the answers

    Which of the following statements about Closed Cycle OTEC systems is true?

    <p>They operate efficiently in a wider range of temperatures.</p> Signup and view all the answers

    What factor limits the commercial deployment of OTEC technology?

    <p>The high initial construction costs associated with OTEC plants.</p> Signup and view all the answers

    What role does cold seawater play in the vaporization process of an Open Cycle OTEC system?

    <p>It condenses the vaporized working fluid back into liquid form.</p> Signup and view all the answers

    How does the power density of OTEC systems compare to other forms of energy generation?

    <p>It is lower than many conventional energy generation methods.</p> Signup and view all the answers

    Which temperature range is warm seawater typically found in for an OTEC system?

    <p>20-25°C</p> Signup and view all the answers

    What distinguishes the vaporization process between Open Cycle and Closed Cycle OTEC systems?

    <p>Open Cycle directly uses seawater as the working fluid.</p> Signup and view all the answers

    What contributes to the low environmental impact of OTEC systems?

    <p>Minimal emission of greenhouse gases.</p> Signup and view all the answers

    What is a significant limitation of Open Cycle OTEC systems?

    <p>Dependence on the availability of warm seawater.</p> Signup and view all the answers

    Which element is crucial in the design of both Open and Closed Cycle OTEC systems?

    <p>The temperature difference between warm and cold seawater.</p> Signup and view all the answers

    What factor significantly affects the predictability of electricity generation from tidal power plants?

    <p>Local tidal patterns</p> Signup and view all the answers

    How does the principle of operation for OTEC systems primarily rely on thermodynamic processes?

    <p>Harnessing the temperature difference between surface and deep ocean water</p> Signup and view all the answers

    Which factor is NOT a consideration in optimizing the design of a two-basin tidal power plant?

    <p>Depth of cold water discharge</p> Signup and view all the answers

    In tidal barrage systems, what happens to the potential energy stored in the upper basin during low tide?

    <p>It is released through sluice gates to generate power</p> Signup and view all the answers

    What is a defining operational feature of a hybrid OTEC system?

    <p>Combines elements of both closed-cycle and open-cycle systems</p> Signup and view all the answers

    Which of the following is a challenge associated with tidal power plant environmental assessments?

    <p>Evaluating impacts on marine ecosystems</p> Signup and view all the answers

    What is a primary benefit of ocean thermal energy conversion (OTEC) compared to solar energy generation?

    <p>Less dependency on weather conditions</p> Signup and view all the answers

    Which engineering challenge is encountered in developing efficient turbine systems for tidal power plants?

    <p>Optimizing turbine performance in varying water velocities</p> Signup and view all the answers

    What operational aspect must be monitored closely in tidal power plants to achieve maximum efficiency?

    <p>Turbine cycle timings and sluice gate operations</p> Signup and view all the answers

    Which type of water is primarily used to condense the vaporized working fluid in OTEC systems?

    <p>Cold deep seawater</p> Signup and view all the answers

    What is the main operational characteristic of tidal stream generators?

    <p>They capture kinetic energy from underwater wind.</p> Signup and view all the answers

    Which of the following describes the functioning of tidal range power plants?

    <p>They exploit the difference in water levels between tides.</p> Signup and view all the answers

    What is a distinct advantage of tidal kite systems compared to traditional tidal generators?

    <p>They can adapt better to changing tidal patterns.</p> Signup and view all the answers

    In two-basin tidal power plants, what mechanism is primarily used to control water flow?

    <p>Sluice gates or turbines within a tidal barrage.</p> Signup and view all the answers

    Which factor significantly enhances the energy generation potential of tidal range power plants?

    <p>The size of the tidal barrage constructed.</p> Signup and view all the answers

    How do tidal stream generators primarily produce electricity?

    <p>Through the rotational motion of underwater turbines.</p> Signup and view all the answers

    What is the main operational technique used by tidal kite systems to generate electricity?

    <p>Utilizing a figure-eight pattern to maximize motion.</p> Signup and view all the answers

    What potential disadvantage is associated with the construction of tidal barrage systems?

    <p>Environmental impacts on local ecosystems.</p> Signup and view all the answers

    What is a primary benefit of using tidal stream generators?

    <p>They utilize predictable tidal currents efficiently.</p> Signup and view all the answers

    Which of the following statements best describes the operation of a tidal range power plant?

    <p>It releases potential energy during low tide through controlled water flow.</p> Signup and view all the answers

    What is a key disadvantage of using Open Cycle OTEC systems compared to Closed Cycle OTEC systems?

    <p>Discharge of working fluid</p> Signup and view all the answers

    Which region is most suitable for the deployment of OTEC systems?

    <p>Tropical and subtropical regions with significant temperature differences</p> Signup and view all the answers

    What engineering challenge is associated with the marine environment in OTEC systems?

    <p>Corrosion and biofouling</p> Signup and view all the answers

    In the Closed Cycle OTEC system, what process follows the vaporization of the working fluid?

    <p>Condenser heat exchange with cold seawater</p> Signup and view all the answers

    Which of the following factors limits the overall power output of OTEC systems?

    <p>Power density compared to other energy sources</p> Signup and view all the answers

    What is a significant drawback of constructing OTEC plants in terms of financial investment?

    <p>Initial construction costs are high</p> Signup and view all the answers

    What happens to the cold seawater in the Closed Cycle OTEC system after it absorbs heat from the working fluid?

    <p>It is released back into the ocean</p> Signup and view all the answers

    What is a major difference between the vaporization processes of Open Cycle and Closed Cycle OTEC systems?

    <p>Open Cycle vaporizes seawater while Closed Cycle vaporizes a working fluid</p> Signup and view all the answers

    Which statement correctly describes the engineering challenges faced by OTEC systems?

    <p>They must address corrosion and biofouling concerns</p> Signup and view all the answers

    Which of the following best describes a key advantage of Closed Cycle OTEC systems over Open Cycle systems?

    <p>They operate in a wider range of temperatures</p> Signup and view all the answers

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