
Heating ventilation and air conditioning
532
4. Inspect receiver–drier sight glass.
5. Refer to Table 13.1.
13.4 Advanced temperature control
technology
13.4.1 Heat transfer
This section outlines three key terms associated with heat transfer and a
typical heat loss calculation.
Convection: This is heat energy transfer that involves the movement of a
uid (gas or liquid). Fluid in contact with the source of heat expands and
tends to rise within the bulk of the uid. Cooler uid sinks to take its place,
setting up convection currents.
Figure 13.29 After adding a dye, leaks can be detected using a UV light
Table 13.1 Symptoms and faults of ...