Vacuum Refrigeration System
Steam-Jet Refrigeration System
Ejector Refrigeration System
evaporator which is kept under vacuum. Water vapor from the evaporators is pumped by steam
jet pumps (called as ejectors) to the main condenser, where vapor is condensed under vacuum.
The pressure ratio in ejector system is usually 7 to 8. The resulting water from the condenser is
pumped to atmosphere pressure. Secondary ejectors are used to pump non –condensable gasses
(air) to the atmosphere pressure. The steam used in these secondary ejectors is condensed in
inter- and after-condenses. (Refer to the figure)
Application:
1. This system is suitable for moderate refrigeration temperatures like those in air
conditioning and some industrial processes.
2. This system is economical only for large installations where steam is available for other
processes.
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