The impact of heat on cooling/air conditioning equipment from the continuous global temperature rise, especially in large building installations, results to a lower cooling capacity and accordingly to an increased energy consumption and many problems with breakdowns.
Air conditioning systems perform at their worst during the warm months of spring and summer, just when they are needed the most. Due to the high temperatures in the outdoor cooling units, the cooling capacity decreases on average of 14-15% and the power draw increases on average of 31%.
The problem occurs in condensers (elements), which have to change vapors refrigerant into liquid forcing the air through the unit and absorbing heat from the refrigerant causing it to condense.
Applying a fully automated high-pressure misting system (adiabatic cooling system) to air-cooled chillers can improve the efficiency under most of the working conditions, as the water mist could lower the air temperature entering the condenser.
In this way the condensers operate at lower pressures and the refrigeration unit greatly improves its efficiency, increases its cooling capacity and saves important energy, since the effort it puts into cooling is less and thus the energy it consumes is much less. At the same time, its service life is significantly increased over a period of years!
The advanced automatic misting systems for adiabatic cooling of ANDRIANOS have the characteristics of fast and flexible installation and low operating costs. They can be used in both new and existing outdoor refrigeration units and in general of the HVAC units, bringing energy savings of up to 37%.
Adiabatic cooling with high-pressure misting systems can be applied where cooling/air conditioning units and heat pump units have been installed and consists indicatively of:
Benefits and advantages
- Air temperature outside the unit lowered by up to 15°C.
- Energy consumption decreased, as much as 37%.
- Increase the efficiency of HVAC units up to 40%.
- Live of the whole system extended.
- 100% automated operation system.
- Low start up and operating costs
- Quick installation.
Energy saving in refrigeration units & heat pumps, to increase the efficiency of S.E.E.R.
Industrial adiabatic cooling systems are the most suitable to create the ideal climate, so that with their direct local misting, the incoming air to the condensers is up to 15°C lower in temperature. In special climatic situations the temperature drop achieved can be even greater! At the same time, they will increase the humidity of the air so that they can absorb more energy from the atmosphere when the temperature rises sharply on hot, dry summer days.
Relative humidity is the amount of water in the air compared to the amount of water that the air is able to absorb - evaporate. The lower the humidity, in the atmosphere, the more water can be evaporated and thus, a greater amount of heat can be removed.
The cooling by using a misting system is very effective in most geographical areas.
This is because when temperatures are at their maximum, during the day, humidity is usually at its lowest level.
With atmosphere at an ambient temperature of 40°C and relative humidity of 50%, the temperature drop will be 8°C lower, i.e. from 40°C to 32°C.
In a standard air-cooled power units, if the temperature which will flow into the condenser is less than 6 ° C, it will result an efficiency improvement of the unit by 14% and if it is lower by 12 ° C the efficiency improvement will be about 25-30% greater, always depending on the current atmospheric conditions.
Operation of Adiabatic Cooling
According to the literature, the operation of the adiabatic cooling system has an effect on the refrigeration units at temperatures from 25 °C and above. Initially, the desired temperature drop can be achieved gradually in temperatures between 25-35 ° C and by raising the ambient temperature higher during the day, the system will operate in continuous mode until it drops to the set parameter and stops. All commands are given by a special advanced temperature sensor-sensor connected to the Tmp control box.
In the parameter settings, after a study, the very significant degree of HRS temperature lag of the On / off of the high pressure pump is calculated and adjusted accordingly. All the necessary actions are regulated through the advanced digital Tmp control box operation and operation of the adiabatic system. The digital T control box with the automatic on / off operation of time spray, contributes to the long-term and smooth operation of the machines and generally of all the equipment.
Water sprayed in powder form (droplets smaller than 5 microns from special high pressure stainless steel nozzles and special stainless steel piping), after measuring passes through the appropriate circuit for cleaning sediments and softening (removal of calcium & magnesium and replacement with sodium) the innovative aluminum panels of special reflective membrane that are placed on the condensers, we create the absolute protection of the machine, reaping huge benefits for it!
Finally, there are several ways of selecting automatic adiabatic cooling systems, which depend on the mode of operation of the refrigeration equipment. ANDRIANOS experts, in cooperation with the customer and his needs, always study and propose the most ideal solution for each individual case.