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power prep quiz 12

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power engineering 3b2 Test sobre power prep quiz 12, creado por TRAVIS CANNING el 28/02/2016.
TRAVIS CANNING
Test por TRAVIS CANNING, actualizado hace más de 1 año
TRAVIS CANNING
Creado por TRAVIS CANNING hace más de 10 años
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Resumen del Recurso

Pregunta 1

Pregunta
Cogeneration is
Respuesta
  • two methods to produce electrical power energy from a single fuel source
  • using one energy source to produce two or more forms of output energy
  • combining two prime movers such as a gas turbine and diesel generator in one plant system
  • all needs are met by one energy source such as power generation, heating, air-conditioning
  • having two or more separate electricity generators in parallel on the same grid

Pregunta 2

Pregunta
A combined steam and gas turbine arrangement can be termed:
Respuesta
  • an ideal system
  • a cogeneration system
  • a once through system
  • ideal relative to system efficiency
  • a high capacity system

Pregunta 3

Pregunta
A cogeneration plant could consist of: 1. diesel engine with attached waste heat boiler 2. gas turbine using a boiler as the combustor 3. steam turbine exhausting to a process steam header 4. gas boiler using the exhaust gas from a gas turbine as combustion air
Respuesta
  • 1,2
  • 1,2,3
  • 2,3,4
  • 1,3,4
  • 1,2,3,4

Pregunta 4

Pregunta
The main advantage of cogeneration is to
Respuesta
  • reduce total energy costs
  • reduce the number of operators required to operate the plant
  • quicker start up times as compared to conventional coal fired power plants
  • less environmental impact
  • all of the above

Pregunta 5

Pregunta
Topping cycle cogeneration is where
Respuesta
  • the fuel supplied is first utilized for a process due to the high thermal energy and the waste heat is utilized in a HRSG
  • the energy supplied to the electrical power grid is only operated during peak demand periods
  • the fuel supplied will first produce electrical power and the heat energy liberated is the byproduct
  • all of the above
  • none of the above

Pregunta 6

Pregunta
Control strategies in a cogeneration system are dependant upon
Respuesta
  • type of available fuel
  • base load operation
  • peak load demands
  • type of facility
  • environmental impact

Pregunta 7

Pregunta
Control strategies used with cogeneration systems are: 1. thermal load 2. electrical load 3. environmental impact 4. duct burner and diverter 5. process demand 6. thermal efficiency
Respuesta
  • 1,2,3
  • 4,5,6
  • 1,2,4
  • 2,4,5
  • 1,2,3,4,5,6

Pregunta 8

Pregunta
Cogeneration systems may include: 1. gas turbines 2. internal combustion engines 3. waste heat 4. steam turbines
Respuesta
  • 1,2
  • 3,4
  • 1,2,3
  • 2,3,4
  • 1,2,3,4

Pregunta 9

Pregunta
The advantages of cogeneration at both the micro and macro levels include 1. wide range of configurations are possible 2. on site electricity 3. quick start-up times 4. pollution free fuel
Respuesta
  • 1,2
  • 3,4
  • 1,2,3
  • 2,3,4
  • 1,2,3,4

Pregunta 10

Pregunta
The pollutants emitted form a cogeneration plant may include: 1. carbon monoxide 2. carbon dioxide 3. NOX 4. water 5. ammonia 6. sulphur dioxide
Respuesta
  • 1,2,3
  • 4,5,6
  • 1,2,3,6
  • 2,3,6
  • 1,2,3,4,5,6

Pregunta 11

Pregunta
A cogeneration system that utilizes an internal combustion engine is best suited for:
Respuesta
  • low electrical loads at varying ambient air conditions
  • areas with little water supplies for cooling purposes
  • remote locations
  • peak demand locations
  • any of the above

Pregunta 12

Pregunta
A cogeneration system that utilizes an internal combustion engine extracts heat from the: 1. exhaust gases 2. lubrication oil system 3. engine water jackets 4. fuel system
Respuesta
  • 1,2,3
  • 2,3,4
  • 1,3,4
  • 1,2,4
  • 1,2,3,4

Pregunta 13

Pregunta
Duct burner firing in an HRSG is utilized to: 1. produce steam when the gas turbine is off-line 2. increase steam production 3. control superheated steam temperature requirements 4. meet the process steam temperature requirements
Respuesta
  • 1,2,3
  • 2,3,4
  • 1,3,4
  • 1,2,4
  • 1,2,3,4

Pregunta 14

Pregunta
Selective catalytic reduction refers to:
Respuesta
  • breaking down the fuels constituents to burn cleaner using a catalyst
  • decreasing the flue gas temperature by running it through a scrubber
  • giving the flue gas an ionic charge for particulate removal
  • lowering the total carbon dioxide emissions through a catalyst
  • lowering the NOX loading by using a catalyst

Pregunta 15

Pregunta
To lower NOX production selective catalytic reduction may be accomplished using:
Respuesta
  • ammonia
  • hydrogen
  • oxygen
  • methane
  • biofuels
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