Chapter 7 Flashcards
The ____________ system has the electrical supply from the utility grid fixed and the cogeneration system looks after the changing electrical requirements.
A) Base loaded
B) Demand based
C) Constant based
D) Home based
E) Set electrical demand
E
Combined cycle cogeneration refers to the production of electricity from:
A) Two sources using two fuel sources
B) Two sources using one fuel source
C) Three sources using one fuel source
D) One source using two fuel sources
E) One source uses one fuel source
B
The control strategy when the fuel supplied first produces electrical power with the thermal energy produced as a by-product, this cogeneration system is called the:
A) Bottoming cycle
B) Waste heat cycle
C) Heat engine cycle
D) Topping cycle
E) Gas turbine cycle
D
____________ is well known for its contribution to the greenhouse effect.
A) Water
B) Steam
C) Oxygen
D) Ammonia
E) Carbon dioxide
E
Co-generation can be defined as:
A) Having two steam generation units in one plant
B) The use of steam for process and power generation purposes
C) The use of two forms of input energy to generate one single form of output energy
D) The use of waste heat off a steam boiler to heat feed water
E) The use of one form of input energy to generate two or more forms of output energy
E
In order to counter the corrosive nature of the condensate produced from burning fuel that has a high sulphur content, a ____________ heat exchanger is installed in the condensing heat recovery systems.
A) High alloy steel
B) Plastic lined
C) Stainless steel
D) High carbon steel
E) Mild steel
C
A single shaft combined-cycle power plant can be arranged so that:
A) The boiler flue gases enter the gas turbine which drives the generator with an HRSG providing additional heat energy
B) The generator is between the HRSG and the steam turbine
C) The gas turbine drives the generator and the exhaust gas from the gas turbine entering the HRSG
D) The HRSG unit is between the generator and the steam turbine
E) The HRSG unit is between the gas turbine and the steam turbine
C
The duct burners in a cogeneration system with a gas turbine can be used to:
- Increase the production of steam
- Control the temperature of the exhaust gas of the turbine
- Control the superheater temperatures
- Meet process steam temperature requirements
A) 2, 3, 4
B) 1, 2, 3
C) 1, 3, 4
D) 1, 2, 3, 4
E) 1, 2, 4
C
An HRSG extracts most of the heat energy from the exhaust of a gas turbine and the remainder of the required heat energy to run the steam turbine is supplied by:
A) A separately fired heater independent of the HRSG
B) Increasing the input energy to the gas turbine
C) Burning fuel in auxiliary burners
D) The heat from the exhaust heat boiler
E) The flue gases of the auxiliary boiler
C
Before attempting to start-up a combined-cycle cogeneration system, __________ should be consulted first.
A) The jurisdictional inspector
B) The local fire department
C) The power company
D) Manufacturer’s guidelines and operating instructions
E) The local gas company
D
The applications of cogeneration can fall into the following areas:
- Institutional establishments
- Large scale industry plants
- Localized central and heating and cooling plants
- Theatres and restaurants
A) 3, 4
B) 1, 2, 3, 4
C) 1, 3, 4
D) 1, 2, 3
E) 1, 2, 4
D
The primary purpose of cogeneration is to:
A) Increase the life span of equipment
B) Reduce the equipment cost
C) Reduce the energy cost
D) Reduce the prices of natural gas
E) Reduce staffing cost
C
The acronym HRSG stands for:
A) Hot Return Steam Generator
B) Heat Return Steam Generator
C) Heat Recovery Steam Generator
D) High Return Steam Generator
E) Heat Recovery Superheated Generator
C
The following are types of simple-cycle cogeneration used today:
- Back pressure steam turbine
- Waste heat cogeneration
- Internal Combustion engine cogeneration
- Gas turbine
- Condensing steam turbine
A) 1, 2, 3, 5
B) 1, 3, 5
C) 2, 3, 4
D) 1, 2, 3, 4
E) 1, 2, 4, 5
D
The acronym HRHWG stands for:
A) Heat Recovery Hot Water Generator
B) Heat Recovery Generator Hot Waste
C) Heat Recovery High Efficiency Water Generator
D) Heat Recovery High Water Generator
E) Heat Recovery High Efficiency Waste Heat Generator
A
