Trane TRG-TRC003-EN Air Conditioner User Manual


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notes
period one
Heat and Refrigeration
Principles of Heat Transfer
Air-conditioning and refrigeration systems use the principles of heat transfer to
produce cooling and heating. The three principles discussed in this clinic are:
■ Heat energy cannot be destroyed; it can only be transferred to another
substance
■ Heat energy flows from a higher temperature substance to a lower
temperature substance
■ Heat energy is transferred from one substance to another by one of three
basic processes
To produce cooling, heat must be removed from the substance by transferring
it to another substance. The first principle to discuss regarding heat transfer is
that heat energy cannot be destroyed; it can only be transferred to another
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