Overfeed systems force liquid in excess of the amount evaporated, either mechanically or by gas pressure, through organized-flow evaporators, separate it from the vapor, and return it to the evaporators. Mechanically pumped systems usually pump from a vessel at the connected suction pressure (i.e., low-temperature liquid). Gas-operated systems can be configured to deliver either low-temperature liquid directly like the mechanically pumped system, or subcooled liquid from a controlled pressure receiver at an intermediate pressure. With the latter, the accumulated overfed liquid is transferred from the low-pressure receiver back to the controlled-pressure receiver.
Overfeed System Operation
Refrigerant Distribution
Oil in System
Circulating Rate
Pump Selection and Installation
Controls
Evaporator Design
Refrigerant Charge
Start-Up and Operation
Line Sizing
Low-Pressure Receiver Sizing
ISBN: 978-1-939200-98-3 (for SI versions of chapters)
ISSN: 1930-7217 (for SI versions of chapters)
Citation: 2018 ASHRAE Handbook–Refrigeration
Product Details
- Published:
- 2018
- ISBN(s):
- 9781939200983
- Number of Pages:
- 10
- Units of Measure:
- SI
- File Size:
- 1 file , 540 KB
- Product Code(s):
- D-R042018SI
