www . refrigerationandaircon . co . za RACA Journal I January 2024 23
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Dry coolers operate solely based on the ambient dry bulb temperature . While they offer zero water consumption , they are restricted to higher operating fluid temperatures . Their physical size and weight may also pose challenges during retrofitting and installation . To offer some needed temperature efficiency to the Dry Coolers the coolers can be supplemented with Adiabatic Pads . Evapco ' s adiabatic dry cooler offers substantial water savings compared to the wet cooler , making it a desirable solution in a world facing climate change , high water costs and stricter regulations . It is a popular option for companies unable to get water quota in some municipalities .
Regarding the advantages of Evapco ' s adiabatic condensers compared to air-cooled ones , the adiabatic condensers have lower installed power , a smaller footprint and higher capacity . This means they can provide more efficient cooling in a compact design . The adiabatic pads are installed on the outside of the condenser unit . Additionally , Evapco offers a free cooling system with solenoid valves that activate the pads and introduce water when needed .
There are two approaches to water management in the cooling system : pumped pad and once through system . Previously , most designs used the pumped pad system , where water recirculates through a pump . However , this can lead to an increase in dissolved solids concentration if water quality is not closely monitored . As a more practical solution , the once through system directs water through the pad and straight to drain . With the pumped pad some manufacturers have even recommend using de-mineralised water , but this can be expensive . Evapco ' s eco Air Series units utilise the once through pad system , which eliminates the need for expensive water treatment .
A group shot of the attendees at the Evapco site visit .
Eco Aire series dry coolers in final assembly .
“ Evapco ’ s adiabatic dry cooler offers substantial water savings compared to the wet cooler , making it a desirable solution in a world facing climate change , high water costs and stricter regulations .”
In conclusion , Evapco constructs coolers with a focus on coil construction , fan section options , control systems and incorporating efficient adiabatic coolers and condensers . Their goal is to provide reliable and energy-efficient cooling solutions for various applications that offer tested and certified capacity . RACA
Eco Aire Series Dry Cooler c / w Adiabatic spray control system .
www . refrigerationandaircon . co . za RACA Journal I January 2024 23