Podcast
Questions and Answers
What is the thermal efficiency of traditional grid-supplied electricity generated in central power stations?
What is the thermal efficiency of traditional grid-supplied electricity generated in central power stations?
- 60%
- 30%
- 40% (correct)
- 50%
What type of power stations achieve efficiencies of 50% by using gas turbines and steam turbines in combination?
What type of power stations achieve efficiencies of 50% by using gas turbines and steam turbines in combination?
- Renewable energy power stations
- Cogeneration power stations (correct)
- Geothermal power stations
- Hydropower stations
What percentage of the primary energy delivered to a power station can be exhausted as waste heat?
What percentage of the primary energy delivered to a power station can be exhausted as waste heat?
- 40%
- 60%
- 50% (correct)
- 30%
What is the maximum theoretical efficiency formula for a heat engine cycle?
What is the maximum theoretical efficiency formula for a heat engine cycle?
In the context of a gas fuelled CHP unit, what is the electrical output if the heat output is 149 kW and the plant operates for 16 hours/day?
In the context of a gas fuelled CHP unit, what is the electrical output if the heat output is 149 kW and the plant operates for 16 hours/day?
What is the mechanical efficiency of an engine that has an electrical output of 80 kW and heat output of 149 kW?
What is the mechanical efficiency of an engine that has an electrical output of 80 kW and heat output of 149 kW?
What is the primary function of a heat pump?
What is the primary function of a heat pump?
Which component of a heat pump is responsible for raising the pressure of the refrigerant gas?
Which component of a heat pump is responsible for raising the pressure of the refrigerant gas?
What is the purpose of the expansion device in a heat pump system?
What is the purpose of the expansion device in a heat pump system?
How is the performance of a heat pump described?
How is the performance of a heat pump described?
What does the Coefficient Of Performance (COP) represent in a heat pump system?
What does the Coefficient Of Performance (COP) represent in a heat pump system?
In a heat pump, what are T1 and T2 in relation to the Coefficient Of Performance (COP)?
In a heat pump, what are T1 and T2 in relation to the Coefficient Of Performance (COP)?
What is the coefficient of performance (COP) for the heat pump in the given scenario?
What is the coefficient of performance (COP) for the heat pump in the given scenario?
In the context of heating a building with a heat pump, what does COP stand for?
In the context of heating a building with a heat pump, what does COP stand for?
What is the heating load for the building that needs to be heated by the heat pump during winter?
What is the heating load for the building that needs to be heated by the heat pump during winter?
If a ground source heat pump has a COP of 4, what is its energy input when supplying heat to the underfloor heating system?
If a ground source heat pump has a COP of 4, what is its energy input when supplying heat to the underfloor heating system?
What does the kinetic energy in wind flow depend on according to the text?
What does the kinetic energy in wind flow depend on according to the text?
How is air flow approaching a horizontal axis wind turbine visualized more easily according to the text?
How is air flow approaching a horizontal axis wind turbine visualized more easily according to the text?
What is the primary focus of low & zero-carbon technologies in buildings?
What is the primary focus of low & zero-carbon technologies in buildings?
Which sector in the European Union contributes most to carbon emissions?
Which sector in the European Union contributes most to carbon emissions?
What is one way to achieve energy minimization in building design?
What is one way to achieve energy minimization in building design?
What is a key function of electricity in buildings according to the text?
What is a key function of electricity in buildings according to the text?
Which of the following does NOT describe electricity as mentioned in the text?
Which of the following does NOT describe electricity as mentioned in the text?
Why are well-insulated buildings emphasized in the context of low & zero-carbon technologies?
Why are well-insulated buildings emphasized in the context of low & zero-carbon technologies?
What is the formula used to calculate the energy in the approaching wind?
What is the formula used to calculate the energy in the approaching wind?
How can buildings be connected to solve the problem of relying on wind power?
How can buildings be connected to solve the problem of relying on wind power?
What are the two main types of solar collectors mentioned in the text?
What are the two main types of solar collectors mentioned in the text?
What is the formula used to calculate the power output from a wind turbine?
What is the formula used to calculate the power output from a wind turbine?
What is the ideal orientation for a solar collector in Egypt?
What is the ideal orientation for a solar collector in Egypt?
What are the key requirements for a solar collector to be functional?
What are the key requirements for a solar collector to be functional?
