Condenser Approach Temperature

Key indicator of condenser heat transfer efficiency. The difference between leaving condenser water temperature and the saturated refrigerant temperature reflects the theoretical lowest the refrigerant can be cooled. A clean condenser at full load is typically 1 to 3 degrees F; fouling widens this.

$$\text{Condenser Approach}=\text{LCWT}-\text{CSRT}$$

Variables

Symbol	Meaning	Unit
LCWT	Leaving Condenser Water Temperature	degrees F
CSRT	Condenser Saturated Refrigerant Temperature	degrees F

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Part of The Blueprint of Water