TRAVIS CANNING
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power engineering 3b2 Quiz on 4.7 Cogeneration Systems and Operation, created by TRAVIS CANNING on 29/02/2016.

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TRAVIS CANNING
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4.7 Cogeneration Systems and Operation

Question 1 of 10

1

The benefits of a combined-cycle with a single shaft gas/steam turbine arrangement are:
1. High level of thermal efficiency
2. Low capital cost
3. Fast start-up and shut down
4. Short construction time
5. Low maintenance cost

Select one of the following:

  • 1,2,3

  • 1,2,4

  • 1,3,4

  • 1,2,3,4

  • 1,2,3,4,5

Explanation

Question 2 of 10

1

_________ is well known for its contribution to the greenhouse effect

Select one of the following:

  • C4H8

  • CO

  • CO3

  • CO2

  • CH3

Explanation

Question 3 of 10

1

In a cogeneration system the thermal load can be controlled by which two of the following strategies
1. Fixed production of a minimum thermal energy
2. Varying requirements for thermal energy
3. Base loaded for maximum thermal energy
4. Topping for minimum thermal energy

Select one of the following:

  • 1,2

  • 2,3

  • 1,3

  • 2,4

  • 1,4

Explanation

Question 4 of 10

1

Which of these cogeneration systems does the following description best describe?

"The compressor driven by the gas turbine supplies pressurized combustion air to mix with fuel and burned in the boiler. The steam produced by the boiler is used to drive a steam turbine that is connected to an electrical generator. The exhaust gases from the boiler are then fed to the gas turbine which is connected to a second electrical generator. "

Select one of the following:

  • Back Pressure Turbine

  • Waste Heat

  • Gas Turbine

  • Combined-cycle Steam/ Gas Turbine

  • Combined-cycle Gas/ Steam Turbine

Explanation

Question 5 of 10

1

When additional thermal energy is required in a cogeneration system, a _____ is often used

Select one of the following:

  • HRSG

  • Gas Turbine

  • Boiler

  • Duct Burner

  • Unit Heater

Explanation

Question 6 of 10

1

HRWH stands for

Select one of the following:

  • Heat Recovery Waste Heater

  • Heat Recovery Water Hydro treater

  • Heat Recovery Water Heater

  • Heat Recovery Waste Hydrotreater

  • Heat Recovery Warming Heater

Explanation

Question 7 of 10

1

A _____ system has the electrical supply from the utility grid fixed and the cogeneration system looks after changing electrical requirements.

Select one of the following:

  • Home based

  • Base Loaded

  • Set electrical demand

  • Constant based

  • Demand based

Explanation

Question 8 of 10

1

The primary purpose of cogeneration is to:

Select one of the following:

  • Reduce the equipment cost

  • Increase the life span of equipment

  • Reduce the prices of natural gas

  • Reduce staffing cost

  • Reduce energy costs

Explanation

Question 9 of 10

1

In order to counter the corrosive nature of the condensate produced from burning fuel with high sulphur content, a _____ heat exchanger is installed in the condensing heat recovery systems.

Select one of the following:

  • Plastic Lined

  • Mild Steel

  • High carbon steel

  • High alloy steel

  • Stainless steel

Explanation

Question 10 of 10

1

During low thermal requirement periods of a cogeneration system a diverter valve is used to direct the:

Select one of the following:

  • Exhaust gases from the HRSG to the atmosphere

  • Thermal energy from the duct burner to the atmosphere

  • Excess electrical energy to another utility grid

  • Thermal energy from the gas turbine to the duct burner

  • Exhaust gases from the gas turbine to the atmosphere

Explanation

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