wunder betaðŸâ€Â§ How does a heat pump work
How does a heat pump work — mechanism, parts, and limits in plain language.
What you’ll learn
- Moving Heat, Not Making ItDefine a heat pump as a reversible machine that relocates heat using a refrigeration loop rather than converting electricity one-for-one into warmth.Heat pumps borrow ambient energy and aim the warm side at your rooms. Reversing valves flip seasons. Cold air still holds usable heat relative to a colder refrigerant.
- The Refrigeration LoopName the four loop stages and explain compressor work and defrost as normal parts of air-source operation.Evaporate, compress, condense, expand. Defrost briefly reverses to clear outdoor ice so the coil can keep exchanging heat.
- Efficiency, Limits, and TradeoffsRelate COP and seasonal ratings to the physics of temperature lift without giving purchase advice for a specific home.Mild weather favors high COP because the lift is small. Ground sources stabilize the cold side. Building envelopes still dominate how hard any machine must work.
Questions this course answers
In heating mode, where does most of the warmth delivered indoors ultimately come from?
The loop absorbs heat from a colder source and rejects it indoors. Electricity primarily powers the compressor and fans; it is not the sole source of the thermal energy delivered.
Order the core refrigeration steps in a heat pump loop.
Absorb at low pressure, compress, reject at high pressure, expand, repeat. That closed sequence is the engine of both heat pumps and refrigerators.
In your own words, why can a heat pump deliver more heat energy to a room than the electrical energy it consumes under mild conditions?
Because ambient heat is relocated rather than created from electricity alone, the ratio of heat out to work in can exceed one when conditions are favorable.
Grounded in trusted sources
- U.S. Department of Energy — Heat pump systems overview
- ENERGY STAR — Heat pump and air conditioner efficiency concepts
- ASHRAE handbooks and fundamentals (refrigeration cycle education)
- International Energy Agency — Heat pumps technology reports
Every Wunder lesson is built from real, reputable sources — never invented.
Related Science courses
Wunder is a personalized learn-anything platform — tell it any topic and it builds a beautiful, fact-checked course in minutes, with narration, a knowledge check, and a college-style University track.
Browse more Science courses · All topics · Home
© 2026 Wunder Learning LLC · Terms & Privacy