Renewable Energy Systems Quiz

Which of the following organisations developed the “mini OTEC”?

• CERN

• NASA

• ISRO

• Natural Energy Laboratory

The open-cycle OTEC uses working fluid.

• False

• True

Which of the following best describes the open-cycle OTEC?

• Warm surface seawater → heat exchanger → working fluid → turbine

• Warm surface seawater → low-pressure container → turbine/generator

• Deep seawater → heat exchanger → working fluid → turbine

• Deep seawater → low-pressure container → turbine/generator

Why does an open-cycle OTEC use low-pressure container?

• To solidify the warm surface seawater

• To evaporate the deep seawater

• To boil and evaporate the warm surface seawater

• To solidify the warm surface seawater

Which of the following produces desalinized fresh water?

• Closed-cycle OTEC

• Fracking

• Ammonia

• Open-cycle OTEC

Why does open-cycle OTEC produce desalinized fresh water?

• Because the vapourised surface seawater leaves all the salts and contaminants in the low-pressure container

• Because of the working fluid

• Because the warm surface seawater is mixed with deep ocean water

• Because of thermohaline circulation

Where is the desalinized fresh water used?

• Sent back into ocean

• Used for irrigation and aquaculture

• Used to generate electricity

• Used to generate tides

Which of the following best describes hybrid ocean thermal energy conversion?

• Warm surface seawater → low-pressure container → turbine/generator

• Deep seawater → vacuum chamber → flash-evaporated → steam vapourises ammonia → turbine

• Warm surface seawater → vacuum chamber → flash-evaporated → steam vapourises ammonia → turbine

• Deep seawater → low-pressure container → turbine/generator

How does hybrid OTEC provide desalinized water?

• By evaporating the warm surface seawater

• By solidifying the warm surface seawater

• By condensing the steam generated from deep seawater

• By condensing the steam generated from warm surface seawater

Which of the following is a good choice for working fluid?

• CFCs

• Steam

• Surface seawater

• Deep seawater