period six
Review
notes
period six
Figure 68
We will now review the main concepts that were covered in this clinic on absorption water chillers.
| | | | | | | |
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| steam or | | | condenser |
| hot water | | |
| | | | |
| generator | | | | | |
| | | | | |
| evaporator | | | chilled |
| | | | | |
| | | | | | water |
| heat | | | expansion |
| exchanger | | |
| | | device |
| | | | | |
| absorber | | | | |
| | | | | cooling | | Figure 69 |
| | | | | water | |
| | | | | | |
| | | | | | | |
Period One presented the basic single-effect, absorption refrigeration cycle. In the generator, dilute solution absorbs heat from the steam or hot water flowing through the tubes, causing the refrigerant to boil and separate from the absorbent solution. As the refrigerant boils away, the absorbent solution becomes concentrated and returns to the absorber. The resulting refrigerant vapor migrates to the cooler condenser, where heat transfers from the hot refrigerant vapor to the cooling water inside the tubes, causing the refrigerant to condense on the tube surfaces. The resulting condensed liquid refrigerant flows through an expansion device, causing a pressure drop that reduces the refrigerant pressure to that of the evaporator. This pressure reduction causes a small portion of the liquid refrigerant to boil off, cooling the remaining refrigerant to the desired evaporator temperature. The cooled mixture of liquid
