The steam from the steam configuration pipe is fed
through the venturi type ejectors, (above) and creates
a vacuum in the evaporator column. It is this vacuum
effect that removes latent heat from the chilled circulation
water being sprinkled through the evaporator column.
The removal of this latent heat rapidly cools down
the temperature of the water within the evaporator.
The shape and design of the venturi ejectors speed
up the flow of steam. As the steam speeds up the pressure
differential created causes a movement of air from
the evaporator column and thus a vacuum is created.
Once the steam reaches the end of the ejectors the
steam expands as the throat of the ejector widens.
Rapid expansion causes the steam to lose temperature
and form water droplets.
Used steam is collected in the condenser column.
Condensing media within the chamber enhances the condensing
effect. Circulation water is also used at this point
to assist cooling within the chambers. Heat is also
removed from the smaller auxiliary venturi ejectors
further on in the process. Condensed steam is re-circulated
and steam that still exists as a vapour is released
3. Heat Exchange
The final stage of the process. The chilled water
is pumped to the heat exchangers. At the same time
industrial process water is also pumped to the heat
exchangers from outside the plant. The resultant heated,
chilled water from the WF process is re-circulated
to the top of the evaporator column where it can be
chilled again. The now cooled industrial process water
can be used to enhance heat exchange in other parts
of the site. It may even be used to aid air-conditioning.