EVAPORATIVE COOLING

Plastic Body With Axial Fan

Plastic Body With Centrifugal Fan

Stainless Steel Body With Centrifugal Fan

What Is Evaporative Cooling?

Evaporative cooling is the addition of water vapour into the air, which causes a decrease in the temperature of the air. The energy needed to evaporate the water is taken from the air in the form of sensible heat, which affects the temperature of the air, and converted into latent heat, the energy present in the water vapour component of the air, whilst the air remains at a constant enthalpy value. This conversion of sensible heat to latent heat is known as an adiabatic process because it occurs at a constant enthalpy value.

Evaporative cooling process causes a drop in the temperature of air proportional to the sensible heat drop and an increase in humidity proportional to the latent heat gain.

A simple example of natural evaporative cooling is perspiration, or sweat, secreted by the body, evaporation of which cools the body.

  • Water is naturally one of the fastest heating liquids and has a very high tendency to evaporate. As a liquid evaporates, it absorbs heat from its surroundings. When water comes in contact with air, it takes heat from the air and cools the air.
  • Evaporative cooling logic is to cool the air by contacting the air with as much water as possible (wet surface).
  • The coolness we feel when we leave the pool in breezy weather, the coolness we feel when we pour cologne on our hands and shake our hands are the best examples of cooling that takes place with the logic of evaporative cooling.

How evaporative cooling works

KEY BENEFITS OF EVAPORATIVE COOLING

Increase in business efficiency:
Human productivity falls by 4% for every degree over 22°C. FES units (Evaporative cooling units) increase human productivity with a high volume of cold air.

Practical Solution:
Quick installation, a direct blow or air distribution with air duct.

Low-cost operation:
No compressor, no cooling gas, no complicated parts.

High Efficiency:
Cooling pads are original Munters CELdec, with very high efficiency and long life.

Economical Investment:
The capital cost is 80% less than the conventional industrial air conditioning systems.

High Indoor Air Quality:
100% fresh air, natural filtration.

Eco Friendly:
No refrigerant, no contaminant, low energy consumption.

Long life:
Stainless steel or plastic casing.

Adiabatic Cooling Pad Systems
Energy savings of up to 30%

In adiabatic cooling pad systems, cool pads are placed in special sheet metal assemblies which are mounted in front of the fin block. With the aid of the pump, water wets the pads from the upper part of the Evaporative Cooling Pad system. The outside air, which is dry and hot, is pre-cooled by passing it through wet cooling pads. The temperature of the air that contact with the wet cooling pads is approximated to the wet thermometer temperature. The water does not contact directly with the fins. Thus fin’s lifetime is longer than the direct spraying systems. Also, pads prevent contamination of fins. 

Since the microorganisms, minerals and similar parts do not mix into the air during the evaporation phase of water, the working principle is completely healthy. The system ensures that production efficiency can be increased with minimum water consumption.

adiabatic cooling
Advantages
  • Air cooled condenser does not get wet
  • Air cooled condenser surface is kept clean, there is no scale formation
  • The manufacturer warranty of condenser is not effected
  • Optimum water usage
  • System works continuously, does not work with on-off periods
  • System does not generate temperature fluctuations
  • The evaporation effectiveness is high ( up to 96% )
  • Operates with minimum energy
  • The system works with low pressure water
  • Electric consumption is minimum (0.5 kw pump)
  • No electrical and complicated devices other than small circulation pump
  • Prevents pressure loss of condenser by keeping it clean
  • Most economical efficiency increase methodology
  • Easy to apply and problem free operation
  • Simple and low cost automation system
  • Very low maintenance cost
  • Increases the life-time of the air cooled chiller

The condenser’s air inlet decreases the system’s working pressure, which creates increased cooling capacity and decreased energy usage.

The savings are illustrated on the table above for Air cooled condensers with and without FESChill unit. As a result of 11°C decrease in inlet air, the energy consumed by the Chiller is decreased by 19% and the cooling capacity is increased by 11%. This allows the EER or COP of the chiller to increase by 36%. On average every 1.8°C decrease of air inlet temperature achieved by the pre-cooling pads, increases the condenser effectiveness by 2 %.

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