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📘 Cold air contains movable heat

A winter morning can feel bitter, yet the outdoor air still contains thermal energy.

3
lessons
~15 min
to learn
Adults
level
Start the course →

What you’ll learn

  1. Heat is still thereExplain that a heat pump transfers thermal energy from outdoor air into a house.Heat remains present in cold air, and a powered refrigeration cycle moves it indoors.
  2. The refrigeration loopTrace compression, condensation, expansion, and evaporation in heating mode.Pressure and phase changes prepare the refrigerant to absorb heat outdoors and release it indoors.
  3. Reversing and delivering heatExplain how a reversing valve changes heating into cooling and how conditions affect delivery.The valve swaps coil roles, while temperature difference and frost shape the performance of the complete heating loop.

Questions this course answers

What is the central job of a heat pump in heating mode?

The system uses electrical work to transfer thermal energy from outdoor air into the building.

Put the heating-mode refrigerant steps in order.

The pressure and phase changes form a repeating sequence from compression through indoor heat release, expansion, and outdoor heat pickup.

In your own words, how does a heat pump warm a house?

The house is warmed because the indoor coil is the condenser in heating mode, while the outdoor coil is the evaporator that gathers heat from the air.

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