Volkswagen Golf Mk7 Service & Repair Manual: Heat always flows from warmer to colder material
This page explains the core thermodynamic principle behind Volkswagen Golf Mk7 air conditioning: fast-moving molecules in a warmer material lose energy to slower molecules in a colder one, cooling the warmer material down.
Every material consists of a mass of moving molecules. The fast moving molecules of a warmer material loose part of their energy to slower molecules possessing less heat. This slows down the molecules of the warmer material and accelerates those with less heat. This continues until the molecules in both materials are moving at the same speed. They have the same temperature, and no further exchange of heat occurs.
Questions & answers
Heat always flows from warmer to colder material — Volkswagen Golf Mk7
Why does the Golf Mk7 AC manual explain heat transfer?
Understanding that heat flows from warm to cold explains how the evaporator absorbs cabin heat and the condenser releases it to the outside air.
