The Refrigeration Cycle

What this topic covers

A conceptual explanation of evaporation, compression, condensation and expansion.

Core thermal ideas

Refrigerant evaporates at low pressure while absorbing heat from the cooled side.

Compression raises refrigerant pressure and temperature before heat is rejected in the condenser.

Expansion lowers pressure before the refrigerant returns to the evaporator.

System tradeoffs

Chiller performance depends on evaporating and condensing conditions, exchanger cleanliness and auxiliary equipment.

What to monitor

Refrigerants are regulated and application-specific; service and charging procedures are outside this site's scope.

Lifecycle perspective

Plant optimization includes chillers, pumps, towers or condenser fans and control sequencing.