The video tutorial explains the function and components of mechanical chillers, which are used to remove heat from buildings. It covers the open cooling water loop and the closed chilled water loop, detailing how heat is exchanged and rejected to the atmosphere. The tutorial also discusses chiller efficiency, focusing on the performance curve and the calculation of chiller load. Key takeaways include the importance of the chiller compressor motor in energy consumption and the role of centrifugal chillers in maintaining building temperature and humidity.

What is the primary function of a mechanical chiller in a building?

• To provide electricity

• To remove heat from the building

• To supply water

• To heat the building

Which component of the chiller is responsible for rejecting heat to the atmosphere?

• Cooling tower

• Compressor

• Evaporator

• Condenser

What is the role of the evaporator in a mechanical chiller?

• To circulate air

• To compress the refrigerant

• To remove heat from the chilled water loop

• To add heat to the chilled water loop

How is the chiller load estimated?

• By measuring the building's temperature

• By observing the weather conditions

• By calculating the chilled water flow rate and temperature differential

• By checking the refrigerant level

What is the conversion factor used to calculate tons of cooling?

• 10,000 BTUs per ton

• 20,000 BTUs per ton

• 12,000 BTUs per ton

• 15,000 BTUs per ton

What does the performance curve of a chiller measure?

• The building's temperature

• The kilowatts of power consumed versus chiller load

• The refrigerant level

• The water flow rate

How can chiller output be determined aside from calculations?

• By listening to the chiller's noise level

• By observing the building's occupants

• By checking the control panel on the chiller

• By measuring the outside temperature

What is the main energy consumer in a mechanical chiller?

• The cooling tower

• The evaporator

• The condenser

• The compressor motor

What type of loop does the centrifugal chiller consist of?

• Both open and closed loops

• Closed loop only

• Neither open nor closed loops

• Open loop only

What is the purpose of the chiller's compressor motor?

• To add heat to the building

• To remove heat from the building

• To circulate air

• To provide lighting