Advanced multi-purpose, multi-stage evaporative cold water/cold air generating and supply system
An industrial heat load evaporative cooling system. The system includes multiple cooling towers and includes cooling coil heat transfer equipment locally associated with an industrial heat load, with the system subject to command and control equipment.
1. A cooling system comprising:
a first-stage cooling assembly that comprises a forced-draft cooling tower having:
an ambient air inlet,
an air outlet,
a cooling fluid reservoir disposed at a bottom of the first-stage cooling tower,
a variable speed fan disposed adjacent to the first-stage air outlet, dedicated to the first-stage cooling tower, and configured to variably control air flow through the first-stage cooling tower, and
a variable flow water pump; and
a final-stage cooling assembly that comprises a forced-draft cooling tower having:
an air inlet,
an air outlet,
a cooling fluid reservoir disposed at a bottom of the final-stage cooling tower,
a variable speed fan disposed adjacent to the final-stage air outlet, dedicated to the final-stage cooling tower, and configured to variably control air flow through the final-stage cooling tower,
a final-stage cooling load heat exchanger at the air inlet of the final-stage cooling tower, and
a variable flow water pump that is adapted to pump cooling fluid through final-stage supply piping; wherein
the first-stage variable flow water pump pumps cooling fluid from the first-stage cooling fluid reservoir through the first-stage supply piping to, and the cooling fluid from the first stage-cooling tower is in indirect heat exchange relationship with, two or more of the following heat exchangers:
the final-stage cooling load heat exchanger serving the air inlet of the final-stage cooling tower;
an intermediate-stage cooling load heat exchanger serving an air inlet of an optional intermediate-stage cooling tower; or
a heat exchanger serving a third cooling load other than the intermediate-stage cooling load or final-stage cooling load heat exchangers; and
warmed fluid is returned directly to wet media of the first-stage cooling tower and then upon being cooled flows down into the first-stage cooling fluid reservoir for reuse, and
the final-stage variable flow water pump pumps cooling fluid from the final-stage cooling fluid reservoir through the final-stage supply piping to a heat exchanger serving a final cooling load and warmed fluid is returned directly to wet media of the final-stage cooling tower and then upon being cooled flows down into the final-stage cooling fluid reservoir for reuse and
the cooling fluid from the final-stage cooling tower is in indirect heat exchange relationship with the heat exchanger serving the final cooling load, but
the first-stage variable flow water pump does not circulate cooling fluid to an air-to-water heat exchanger servicing the ambient air inlet of the first-stage cooling tower.
2. The cooling system of claim 1 additionally comprising:
an intermediate-stage cooling assembly that comprises a forced-draft cooling tower having:
an air inlet,
an air outlet,
a cooling fluid reservoir disposed at a bottom of the intermediate-stage cooling tower,
a variable speed fan disposed adjacent to the intermediate-stage air outlet, dedicated to the intermediate-stage cooling tower, and configured to variably control air flow through the intermediate-stage cooling tower,
an intermediate-stage cooling load heat exchanger at the air inlet of the intermediate-stage cooling tower, and
a variable flow water pump that is adapted to pump cooling fluid through intermediate-stage supply piping; wherein
the intermediate-stage variable flow water pump pumps cooling fluid from the intermediate-stage cooling fluid reservoir through the intermediate-stage supply piping to, and the cooling fluid from the intermediate stage-cooling tower is in indirect heat exchange relationship with, two or more of the following heat exchangers:
the final-stage cooling load heat exchanger serving the air inlet of the final-stage cooling tower;
a second, intermediate-stage cooling load heat exchanger serving the air inlet of another optional intermediate-stage cooling tower; or
a heat exchanger serving a fourth cooling load other than the intermediate-stage or final-stage air inlet heat exchangers; and
warmed fluid is returned directly to wet media of the intermediate-stage cooling tower and then upon being cooled flows down into the intermediate-stage cooling fluid reservoir for reuse.
3. The cooling system of claim 1 wherein the final-stage cooling tower further comprises an energy recovery system connected to the cooling tower air outlet.
4. The device of claim 3 wherein the intermediate-stage cooling tower further comprises an energy recovery system connected to the cooling tower air outlet.
5. The device of claim 3 wherein the energy recovery system comprises a closed cooling loop that comprises a heat exchanger and a cooling load.
6. The device of claim 4 wherein the energy recovery system comprises a closed cooling loop that comprises a heat exchanger and a cooling load.