"Evaporative cooling will revolutionise AC sector"

Evaporative cooling is going to revolutionise the air-conditioning sector in the Middle East, according to Coolerado's Steve Slayzak

Steve Slayzak is vice president of technology at Coolerado Corporation.
Steve Slayzak is vice president of technology at Coolerado Corporation.

Evaporative cooling, especially sub-wet bulb cooling in precooling application, is a technology that is going to revolutionise the air-conditioning sector in the Middle East, according to the vice president of technology at Coolerado Corporation.

In an American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) seminar on fresh air precooling through dew point coolers in Dubai, Steve Slayzak touched on the underlying principles of evaporative cooling technology, and analysed its possible applications.

Slayzak began his presentation by explaining about direct evaporative cooling (DEC), and then went on to introduce indirect evaporative cooling (IDEC). He described the Maisotsenko Cycle (sub-wet bulb cooling), with special focus on fresh air precooling application and how to overcome the limitations of the gulf climate.

Coolerado's VP of technology said that, for any given set of conditions, sub-wet bulb coolers will give the lowest supply temperatures with no moisture.

He noted that direct coolers will give the next lowest supply temperatures, but with humidity; indirect coolers will give the highest supply temperatures; and heat recovery configurations can be used to provide additional benefits.

Slayzak also outlined suitable applications for the technologies, stating that direct coolers could be used in factories, warehouses, and other large spaces; indirect coolers could be used for precooling and applications within higher temperatures; and sub-wet bulb coolers could be used to provide more efficient fresh air precooling and standalone displacement cooling.

With more than 23 years of experience in buildings science and research and development (R&D) focussed on advanced cooling and thermal conversion technologies, Slayzak is the former chairman of ASHRAE's Desiccant and Sorption committee.

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