Impresind srlCondizionamento industriale
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Air conditioning VS Evaporative cooling

Air conditioning

  • re-circulation of the same wasted air and low on?oxygen.
  • the continuous re-circulation of the air lowers its oxygen levels and can cause sick building syndrome.
  • uses refrigerant gases and needs high consumption of electricity.
  • emits in the environment CO2 gas and HFC gas, these are chemical agents that effect the?ozone depletion and increase the greenhouse effect.
  • opening of doors and windows creates a major effort for the units, it makes increase the running costs and decrease the life time of the system.

Evaporative cooling

  • evaporative cooling works with windows and doors open, it inputs in the premises external air so it continuously changes the air in the building.
  • the wet filters of the evaporative coolers block dust and particles in the air giving fresh, clean and natural air to the building.
  • It does not use refrigerant gases but it only uses water from the network and a very low amount of electricity.
  • It does not emit polluting gases in the atmosphere. The fresh air that exits the coolers is “cleaned” and cleans the air in the cooled premises.
  • Reduces the costs to a small fraction than what would be necessary with a traditional air conditioning system.

COMPARISON EXAMPLE

WHAT IS NEEDED

We need to cool a building of 1.000sqm, medium insulation and average outside conditions during summer of 30?C

RESULT

It is estimated a cooling ?need of 120 kW

SOLUTION

DIRECT EXPANSION AIR CONDITIONING COLD AIR EVAPORATIVE COOLING
To air conditiong the building it has been chosen a VRV system for a total of 120kW cooling power, with internal duction for distribution of the air For cooling the building it has been chosen the Cold Air evaporative cooling system with a total air input of 80.000 mc/h comparable with 120kW cooling power .
AVERAGE COST OF THE INVESTMENT FOR THE COMPLETE INSTALLED SYSTEM
? 61.368,00 ? 23.850,00
AVERAGE MONTHLY RUNNING COST OF THE ENTIRE SYSTEM
1.420,00 ? 236,00

Further advantages of evaporative cooling

  • The fresh and clean air given by the evaporative coolers avoids the sick building syndrome, increases productivity and decreases injuries during the warm/hot months.
  • It has been proven that a slight increase in the humidity in the air grants better health and helps to eliminate smells.
  • Reduces the costs to a small fraction than what would be necessary with a traditional air conditioning system.
  • Cooling a building with the Cold Air evaporative coolers permits to obtain continuous clean air,?independently?from how many air changes are applied.
  • Unlike the misting?systems, the Cold Air evaporative coolers are virtually insensible to humidity, they work at their best with temperatures above 25?C and a relative humidity lower than 75%. The misting systems are practically inefficient with relative humidity above 30%.
  • By using evaporative cooling systems instead of traditional air conditioning systems it has been calculated that it could be possible to reduced the world consumption of oil used for cooling systems of an amazing 90% per year and reduce the CO2 emissions of many tons.