Heat recovery control in refrigeration systems

The principle of the refrigeration cycle is shown in Fig. 27.17. Where the refrigerant passes through the following four phases:

1 evaporation (with heat absorption)

2 compression (with energy absorption)

3 condensation (with heat emission)

4 expansion

Liquid

Fig. 27.17

In a refrigeration system, a second condenser can be incorporated in the cycle and the recovered heat used for:

1 heating domestic water,

2 supply air heating,

3 reheating in the case of supply air dehumidification.

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