Evaporative cooling is a method of producing cold air, suitable for air conditioning applications, presenting the following advantages:

  • reduced electricity consumption by up to 80% and
  • exemption from hazardous refrigerants.

As part of our research activities, the Laboratory of Applied Thermodynamics constructed an experimental evaporative cooling cycle, similar to Maisotsenko cycle. This cycle uses a novel geometry to maximize cooling efficiency. The advantages of the Maisotsenko cycle against conventional evaporative cooling systems are:

  • possibility of achieving lower temperatures, generally below the wet bulb temperature of the environment,
  • greater efficiency and reduced water consumption
  • low pressure drops, in the absence of porous medium.

The results of the experimental procedure demonstrated the great effectiveness of this device, producing air at 21oC - 22oC and humidity of about 55%. The possibility of improving the cooler with independent control air supply was examined, in order to show if any further water savings and further reduction of the air outlet temperature happen. It has been proven that the flow rate reduction by 50% causes a decrease in the air outlet temperature by up to 2.5oC, thus allowing the cooler to cover more cooling loads. This reduction also leads to 40% water savings.

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