period three
Evaporators
notes
Turbulent Flow
Figure 25
The fins of the coil are formed to produce turbulence as the air passes through them. This turbulence enhances heat transfer, preventing stratification within the
Finned-Tube Evaporator
liquid/vapor refrigerant
airflow
liquid distributor
suction | refrigerant vapor | |
header | ||
Figure 26 | ||
|
To provide uniform heat transfer throughout the coil, the liquid refrigerant is distributed to the coil tubes in several parallel circuits. A distributor is used to ensure uniform refrigerant distribution through these multiple coil circuits. It distributes the liquid/vapor refrigerant mixture to the coil through several tubes of equal length and diameter.
As the refrigerant passes through the tubes of the coil, the liquid refrigerant absorbs heat from the air, causing it to boil off into vapor. The refrigerant vapor leaves the coil tubes and collects in a suction header.
| 17 |