Tidal Energy Systems Overview Quiz
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Questions and Answers

What distinguishes a single basin tidal power plant from a two-basin tidal power plant?

  • Single basin plants are larger in size compared to two-basin plants.
  • Single basin plants utilize solar energy, while two-basin plants utilize wind energy.
  • Single basin plants harness kinetic energy, while two-basin plants harness potential energy. (correct)
  • Single basin plants do not depend on water levels, whereas two-basin plants do.

    • Which of the following describes the operation of tidal stream generators?

  • They capture kinetic energy from moving water currents. (correct)
  • They focus on storing energy from high tide.
  • They create barriers to control water flow.
  • They rely solely on wind to generate power.

    • What is a primary advantage of tidal kite systems over other tidal energy systems?

  • Flexibility in adapting to changing tidal patterns. (correct)
  • Lower initial installation costs.
  • Higher electricity generation capacity.
  • Less reliance on seawater salinity.

    • How does a tidal range power plant generate electricity?

    <p>By allowing water to flow through turbines as the tide recedes.</p> Signup and view all the answers

    What is the primary operational mechanism of tidal stream generators?

    <p>Underwater turbines that rotate with water currents.</p> Signup and view all the answers

    Which type of tidal energy technology allows for easier maintenance due to its design?

    <p>Tidal kite systems.</p> Signup and view all the answers

    What is a defining characteristic of two-basin tidal plants?

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

    Which of the following is NOT an advantage of tidal stream generators?

    <p>Capability to generate excess energy in calm conditions.</p> Signup and view all the answers

    What factors contribute to the high energy generation potential of tidal range power plants?

    <p>Large tidal ranges and differences in water levels.</p> Signup and view all the answers

    How is the energy generated by tidal kite systems transformed into electricity?

    <p>By mechanical movement of tethered kites.</p> Signup and view all the answers

    What is the primary mechanism used to generate electricity in a two-basin tidal power plant?

    <p>Water flowing through turbines as tides change</p> Signup and view all the answers

    In a tidal barrage system, what happens during high tide?

    <p>Potential energy is stored in the upper basin</p> Signup and view all the answers

    Which factor does NOT influence the power developed by a tidal range power plant?

    <p>Temperature of seawater</p> Signup and view all the answers

    What defines the water levels during a tidal cycle?

    <p>High tide and low tide changes</p> Signup and view all the answers

    What is the main advantage of Ocean Thermal Energy Conversion (OTEC)?

    <p>It uses the ocean's temperature difference for continuous power generation</p> Signup and view all the answers

    Which type of OTEC system does NOT directly use seawater as the working fluid?

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

    What is a crucial consideration when developing tidal power plants?

    <p>Minimizing environmental impacts on marine life</p> Signup and view all the answers

    In which scenario would a tidal range power plant produce the most electricity?

    <p>With a tidal range that is significantly high</p> Signup and view all the answers

    What is the cycle that occurs in Closed-Cycle OTEC systems primarily focused on?

    <p>Vaporizing a low-boiling-point fluid repeatedly</p> Signup and view all the answers

    What technological advancement has recently contributed to the efficiency of tidal power plants?

    <p>Advancements in turbine technology</p> Signup and view all the answers

    What is the primary function of the Evaporator in an Open Cycle OTEC system?

    <p>To vaporize warm seawater and drive the turbine</p> Signup and view all the answers

    Which challenge is commonly associated with the construction of OTEC plants?

    <p>High initial cost for construction</p> Signup and view all the answers

    What distinguishes Closed Cycle OTEC from Open Cycle OTEC?

    <p>Closed Cycle OTEC has a closed loop with a separate working fluid</p> Signup and view all the answers

    What is the main environmental advantage of OTEC systems?

    <p>Relatively low environmental impact</p> Signup and view all the answers

    In which locations is OTEC most effective?

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

    What is one significant engineering challenge faced by OTEC systems?

    <p>Corrosion and biofouling in a marine environment</p> Signup and view all the answers

    How does the Closed Cycle OTEC system utilize the working fluid?

    <p>The working fluid is vaporized and continuously circulated</p> Signup and view all the answers

    What happens to the vaporized working fluid after passing through the turbine in a Closed Cycle OTEC system?

    <p>It condenses back into a liquid in a separate heat exchanger</p> Signup and view all the answers

    What describes the power density of OTEC systems compared to other energy generation forms?

    <p>OTEC systems have lower power densities</p> Signup and view all the answers

    What is the fate of the cold seawater after it absorbs heat from the working fluid in a Closed Cycle OTEC system?

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

    What is the primary mechanism by which tidal stream generators capture energy?

    <p>Harnessing kinetic energy from moving water currents</p> Signup and view all the answers

    Which advantage is specifically associated with tidal kite systems compared to other tidal power technologies?

    <p>Greater flexibility in adapting to tidal patterns</p> Signup and view all the answers

    What is the role of sluice gates in a tidal range power plant?

    <p>To control the flow of water during different tides</p> Signup and view all the answers

    During the operation of a tidal barrage system, what key factor contributes to energy generation?

    <p>Difference in water levels between high and low tides</p> Signup and view all the answers

    One benefit of tidal stream generators is their environmental impact. What is a noted advantage?

    <p>Less environmental impact compared to other energy sources</p> Signup and view all the answers

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

    <p>They exploit potential energy from water level differences.</p> Signup and view all the answers

    Which aspect of tidal kites contributes to their energy generation efficiency?

    <p>Tethered movement in a figure-eight pattern</p> Signup and view all the answers

    What is a common comparative feature of both single basin and two-basin tidal plants?

    <p>Both types rely on ocean tides for energy.</p> Signup and view all the answers

    What characteristic of a tidal range power plant allows for maximizing energy generation potential?

    <p>High tidal ranges between high and low tides</p> Signup and view all the answers

    What principle underlies the operation of tidal stream generators?

    <p>Harnessing kinetic energy of water currents</p> Signup and view all the answers

    What is a major drawback of Ocean Thermal Energy Conversion (OTEC) systems in terms of energy generation?

    <p>Limited power density</p> Signup and view all the answers

    Which part of the Open Cycle OTEC system is responsible for vaporizing the working fluid?

    <p>Evaporator</p> Signup and view all the answers

    Which type of seawater is used in the Condenser of both Open and Closed Cycle OTEC systems?

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

    What engineering challenge is specific to the marine environment when building OTEC plants?

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

    What is one of the key distinctions of Closed Cycle OTEC systems compared to Open Cycle systems?

    <p>They utilize a separate working fluid in a closed loop</p> Signup and view all the answers

    In which regions is OTEC technology most effective due to temperature differences?

    <p>Tropical and subtropical regions</p> Signup and view all the answers

    What happens to the working fluid in a Closed Cycle OTEC system after it expands in the turbine?

    <p>It is condensed back into a liquid</p> Signup and view all the answers

    Which of the following is a common misconception regarding the operating mechanism of Open Cycle OTEC systems?

    <p>They do not discharge any seawater</p> Signup and view all the answers

    Which factor contributes to the high initial cost of constructing OTEC plants?

    <p>Complex engineering requirements</p> Signup and view all the answers

    What is the main purpose of sluice gates in a two-basin tidal plant?

    <p>To control the flow of water between the upper and lower basins</p> Signup and view all the answers

    How does the tidal cycle influence electricity generation in a tidal power plant?

    <p>It affects the potential energy stored in the upper basin</p> Signup and view all the answers

    Which factor significantly affects the power output of a tidal range power plant?

    <p>The tidal range between high tide and low tide</p> Signup and view all the answers

    What role do turbines play in a tidal barrage system?

    <p>They convert mechanical energy from flowing water into electrical energy</p> Signup and view all the answers

    What is a major environmental concern associated with tidal power plants?

    <p>Potential disruptions to marine ecosystems</p> Signup and view all the answers

    How do Ocean Thermal Energy Conversion (OTEC) systems generate electricity?

    <p>By exploiting the temperature difference between ocean layers</p> Signup and view all the answers

    Which type of OTEC system employs seawater directly as the working fluid?

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

    What is a significant advantage of using tides for energy generation?

    <p>Tidal energy generation has minimal environmental impact</p> Signup and view all the answers

    What feature of a typical two-basin tidal power plant aids in energy storage?

    <p>The height difference between the basins</p> Signup and view all the answers

    Which element contributes to the efficiency of turbogenerator systems in OTEC?

    <p>The temperature of the low-boiling-point fluid</p> Signup and view all the answers

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