Controllable vacuum systems with mixing condensers
Steam jet vacuum systems can be equipped with a control unit to adapt to changing cooling water temperatures (summer/winter). So the minimum required motive steam consumption is automatically adjusted according to the respective cooling water temperature.
Controlling takes place within the motive flow zone through reduction of the motive steam pressure or by varying the nozzle (nozzle needle) cross-section. Particularly, the nozzle needle control has shown good results as it utilises the maximum expansion ratio throughout the motive steam nozzle. The nozzle needle can be axially displaced by means of electrical or pneumatic actuators.
As a result, this installation offers tailor-made consumptions and therefore reduced energy costs whereas performance remains unchanged. In contrast to non-controllable installations the investment costs for controllable vacuum systems are higher. However, pay-back time is very short.
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- vacuum systems with mixing condensers and liquid ring vacuum pump
- vacuum systems with mixing condensers for non-barometric installation
- vacuum systems with mixing condensers in closed alkaline loop (chilled water)
- vacuum systems with mixing condensers in closed alkaline loop (cooling water)
- vacuum systems with process-vapour operated ejectors