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power engineering 3b2 Quiz am 4.7 Cogeneration Systems and Operation, erstellt von TRAVIS CANNING am 29/02/2016.

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4.7 Cogeneration Systems and Operation

Frage 1 von 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

Wähle eine der folgenden:

  • 1,2,3

  • 1,2,4

  • 1,3,4

  • 1,2,3,4

  • 1,2,3,4,5

Erklärung

Frage 2 von 10

1

_________ is well known for its contribution to the greenhouse effect

Wähle eine der folgenden:

  • C4H8

  • CO

  • CO3

  • CO2

  • CH3

Erklärung

Frage 3 von 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

Wähle eine der folgenden:

  • 1,2

  • 2,3

  • 1,3

  • 2,4

  • 1,4

Erklärung

Frage 4 von 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. "

Wähle eine der folgenden:

  • Back Pressure Turbine

  • Waste Heat

  • Gas Turbine

  • Combined-cycle Steam/ Gas Turbine

  • Combined-cycle Gas/ Steam Turbine

Erklärung

Frage 5 von 10

1

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

Wähle eine der folgenden:

  • HRSG

  • Gas Turbine

  • Boiler

  • Duct Burner

  • Unit Heater

Erklärung

Frage 6 von 10

1

HRWH stands for

Wähle eine der folgenden:

  • Heat Recovery Waste Heater

  • Heat Recovery Water Hydro treater

  • Heat Recovery Water Heater

  • Heat Recovery Waste Hydrotreater

  • Heat Recovery Warming Heater

Erklärung

Frage 7 von 10

1

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

Wähle eine der folgenden:

  • Home based

  • Base Loaded

  • Set electrical demand

  • Constant based

  • Demand based

Erklärung

Frage 8 von 10

1

The primary purpose of cogeneration is to:

Wähle eine der folgenden:

  • Reduce the equipment cost

  • Increase the life span of equipment

  • Reduce the prices of natural gas

  • Reduce staffing cost

  • Reduce energy costs

Erklärung

Frage 9 von 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.

Wähle eine der folgenden:

  • Plastic Lined

  • Mild Steel

  • High carbon steel

  • High alloy steel

  • Stainless steel

Erklärung

Frage 10 von 10

1

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

Wähle eine der folgenden:

  • 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

Erklärung