How A Heat Pump Works - HVAC

The video tutorial explains the components and operation of heat pump systems, focusing on both cooling and heating modes. It covers the roles of the indoor and outdoor units, the flow of refrigerant, and the function of key components like the compressor, expansion valve, and reversing valve. The tutorial also discusses how heat pumps extract energy from the air, even in cold conditions, and the impact of refrigerant boiling points on efficiency.

What are the main components of a heat pump system?

• Solar panels, battery, and inverter

• Wind turbine, generator, and transformer

• Boiler, radiator, and thermostat

• Outdoor unit, indoor unit, and insulated pipes

Which component is the driving force of refrigerant in a heat pump system?

• Compressor

• Expansion valve

• Heat exchanger

• Fan

In cooling mode, what role does the indoor unit play?

• Evaporator

• Condenser

• Reversing valve

• Compressor

What happens to the refrigerant as it leaves the compressor in cooling mode?

• It becomes a medium pressure, medium temperature liquid

• It becomes a high pressure, high temperature vapor

• It becomes a low pressure, low temperature liquid

• It becomes a low pressure, high temperature vapor

In heating mode, which unit acts as the evaporator?

• Both units

• Outdoor unit

• Neither unit

• Indoor unit

What is the state of the refrigerant when it enters the indoor unit in heating mode?

• Low pressure, high temperature vapor

• High pressure, high temperature vapor

• Low pressure, low temperature liquid

• Medium pressure, medium temperature liquid

Why can heat pumps extract energy from cold air?

• Because the fan increases air temperature

• Because the compressor generates heat

• Because the refrigerant has a very low boiling point

• Because air always has energy regardless of temperature

What is the boiling point of refrigerant R134A?

• 100 degrees Celsius

• -26 degrees Celsius

• -48 degrees Celsius

• 0 degrees Celsius

How does the efficiency of a heat pump change with air temperature?

• Efficiency increases as air temperature decreases

• Efficiency decreases as air temperature increases

• Efficiency remains constant regardless of air temperature

• Efficiency increases as air temperature increases

What powers the compressor in a heat pump system?

• Natural gas

• Electricity

• Wind energy

• Solar energy