Refrigeration & Equipment Engineering

Unit 3 - Parts of refrigeration systems

3.3.3.2.1.Tubes in tube or double tube condenser
This type of condenser consists of a water tube inside a large refrigerant tube. In this type of condenser the hot vapour refrigerant enters at the top of the condenser.

The water absorbs the heat from the refrigerant and the condensed liquid refrigerant flows at the bottom since the refrigerant tubes are exposed to ambient air, Therefore some of the heat is also absorbed by ambient air by natural convection. The cold water in the inner tubes may flow in either direction. Opposite to the refrigerant, it is said to be a counter flow system on the other hand, when the water enters at the top and flows in the same direction as the refrigerant, it is said to be parallel flow system.