Choice of Jacir : real closed cooling tower, not necessarily using glycol, with stainless steel heat exchanger, totally removable and cleanable.
Closed cooling tower principle and operation
Definition : "equipment where the process fluid flows through a heat exchanger, cooled by water in direct contact with air. The exchanger is either inside the tower, or attached on the side of the cooling tower".
Jacir has decided for the attached option, as it combines the very high performance of the packing of cooling tower, with the very high performance of a plate heat exchanger, and with the necessary need to be able to keep the circuits clean : total easy disassembly.
The fluid to be cooled flows through the primary circuit of a stainless steel plate heat exchanger. The water from the secondary circuit, flows from the heat exchanger to the top of the cooling tower. This water is distributed on the exchange surface through the nozzles. The air is forced by the fan from the bottom to the top of the cooling tower. During the pass, it has been warmed up and saturated in water through the exchange surface. Because of the superficial tension created by the exchange surface, the water equally flows down along the whole height of the so extended exchange surface. Cooled by the forced air, the water falls by gravity to the inclined basin located on the bottom of the tower. This water is recycled on the plate heat exchanger by the circulating pump.
The fans used for centrifugal cooling towers are designed and manufactured by Jacir, and continuously improved over the years.
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The impeller is a double side air inlet type. The air inlet ducts are removable to access to the impeller.
Located in the dry air flow and outside the tower basin, motor fan set is protected against corrosion by an Elastair coating type (350 à 400μM thickness) and ultra-violets proof.
Jacir technical choice: real closed-circuit cooling tower, glycol-free, with stainless steel heat exchanger, totally removable and cleanable. Definition: "equipment where the process liquid flows through a heat exchanger, cooled by water in direct contact with air. The exchanger is either inside the tower, or attached to the outside of the cooling tower".
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Jacir has selected the second option, as it combines the very high performance of the packing of the cooling tower, with the very high performance of a plate heat exchanger and with the hygiene that is mandatory for the circuit: full access and removability.