Podcast
Questions and Answers
What is the primary method to provide mechanical cooling?
What is the primary method to provide mechanical cooling?
- Vapour compression refrigeration (correct)
- Air conditioning fans
- Vapour absorption refrigeration
- Thermal insulation
In compression refrigeration cycles, what advantage do highly compressed fluids at one temperature have?
In compression refrigeration cycles, what advantage do highly compressed fluids at one temperature have?
- They evaporate immediately when expanded
- They get warmer when expanded
- They tend to get colder when expanded (correct)
- They stay at the same temperature when expanded
What advantage do vapour-compression refrigeration cycles have regarding thermal energy?
What advantage do vapour-compression refrigeration cycles have regarding thermal energy?
- They require minimal thermal energy
- They exploit the large thermal energy required to change a liquid to a vapour (correct)
- They have high thermal conductivity
- They don't rely on thermal energy
What is the benefit of the isothermal nature of vaporization in vapour compression refrigeration?
What is the benefit of the isothermal nature of vaporization in vapour compression refrigeration?
What is the main challenge in refrigeration and air conditioning systems?
What is the main challenge in refrigeration and air conditioning systems?
Why do compression refrigeration cycles take advantage of highly compressed fluids?
Why do compression refrigeration cycles take advantage of highly compressed fluids?
What did Carrier present in an ASME meeting?
What did Carrier present in an ASME meeting?
When did air conditioning for comfort begin in motion-picture theatres?
When did air conditioning for comfort begin in motion-picture theatres?
What is the working substance under study in air conditioning?
What is the working substance under study in air conditioning?
Is moist air considered a pure substance?
Is moist air considered a pure substance?
Which gases make up the fixed part of moist air?
Which gases make up the fixed part of moist air?
In what kind of laws can perfect gas laws be applied?
In what kind of laws can perfect gas laws be applied?
What are the four basic components of all vapor compression systems?
What are the four basic components of all vapor compression systems?
What is the purpose of the expansion valve in a vapor compression system?
What is the purpose of the expansion valve in a vapor compression system?
Why is the Carnot vapor compression cycle not suited for practical refrigeration systems?
Why is the Carnot vapor compression cycle not suited for practical refrigeration systems?
What is the purpose of a throttle valve in a vapor compression system?
What is the purpose of a throttle valve in a vapor compression system?
Why is wet compression undesirable in a refrigeration system?
Why is wet compression undesirable in a refrigeration system?
Which component is responsible for raising the pressure of the refrigerant in a vapor compression system?
Which component is responsible for raising the pressure of the refrigerant in a vapor compression system?
What component controls the flow of condensed refrigerant back into the evaporator?
What component controls the flow of condensed refrigerant back into the evaporator?
Why is an isentropic expansion preferred over throttling in a vapor compression cycle?
Why is an isentropic expansion preferred over throttling in a vapor compression cycle?
What happens during wet compression in a vapor compression cycle?
What happens during wet compression in a vapor compression cycle?
In which path of the Carnot vapor compression cycle does dry compression occur?
In which path of the Carnot vapor compression cycle does dry compression occur?
What is the main reason the Carnot vapor refrigeration cycle is not suitable for use in refrigeration systems?
What is the main reason the Carnot vapor refrigeration cycle is not suitable for use in refrigeration systems?
In a vapor compression refrigeration cycle, what process is used to achieve the desired expansion from state 4 to state 5?
In a vapor compression refrigeration cycle, what process is used to achieve the desired expansion from state 4 to state 5?
How does a vapor absorption system differ from a vapor compression system?
How does a vapor absorption system differ from a vapor compression system?
What is the function of the absorbent in the absorber of a vapor absorption system?
What is the function of the absorbent in the absorber of a vapor absorption system?
In a lithium bromide absorption system, what is used as the absorbent?
In a lithium bromide absorption system, what is used as the absorbent?
What function does the generator perform in a vapor absorption system?
What function does the generator perform in a vapor absorption system?
Who is known as the 'Father of Air Conditioning'?
Who is known as the 'Father of Air Conditioning'?
