FOCS-CA Highest Energy Efficiency
With full-load efficiency always above 3.1 - the Eurovent Class A rating threshold - the FOCS-CA units feature extremely low running costs, which means the investment is optimized, by considerably reducing the Total Life Cycle Cost (initial investment cost plus running and maintenance costs for the whole of the unit's service life). This result is achieved thanks to an extreme focus on the quality of the components adopted and on their optimal integration, which steered all the technological decisions at the engineering stage.
The adoption of exclusive evaporators with an asymmetrical structure and the intelligent control of resources is among the features of those units, which optimizes the heat exchange performance. An inspired choice in a wide range of applications, especially where efficiency requirements, both at full and part-load, are particularly binding.
FOCS-HT for safety OPERATION AT HIGH TEMPERATURE
This series has been specially designed to assure reliable and durable operation in areas with extreme climatic conditions: high outdoor temperature, scorching heat. Special devices have been adopted in order to achieve the requested cooling capacity at very high ambient temperature.
This choice permits to obtain the best compromise between price and performances and assures seamless operation, without interruptions. This series guarantees a safety operation up to 50°C at full load and up to 57°C at partial load.
OASIS cooling kit: the perfect solution for air conditioning beyond the units’ operating limits
Especially in harsh climates, with requirements of prolonged operation at high ambient air temperatures, units can benefit from devices offering additional cooling whenever outdoor conditions become critical.
The ideal solution in these situations is to lower the condenser coil entering air temperature when it is becomes too high, causing the condensing temperature to go over the compressors operating limits. This is obtained by Climaveneta with the Oasis kit option.
How Oasis kit works
When the condensing conditions reach a pre-defined set point, the controller open a solenoid valve and water is sprayed over a
Plastic net. The contact between the airflow forced through the wet plastic net, reduces the condenser coil inlet air temperature. This allows:
1) A further extension of the operating limits by 5-6 °C, depending on the relative humidity.
2) A benefit for the silenced version (because the high condensing
control can be postponed to higher temperature).
3) Increased efficiency of the unit when the system is active.
Climaveneta's system advantages vs traditional solutions
The Climaveneta Oasis solution offers many advantages even if compared to systems with pressurized atomizers which spray water directly to the coil:
- No dedicated pumps: the water is taken direktly from tap water.
- No limestone on the coil: the water is sprayed toward the plastic net, and not toward the coil.
- Easy application - it's possible to use common supply water, no need of special water treatment.
- Minimized risk of bacterial population increase: recirculated water loop does not exist; water immediately evaporates when sprayed on the net.
- Optimal control of water consumption: thanks to effective spray regulation.
Oasis kit performances
The table shows the effects of Oasis kit in relation with outside air temperature and relative humidity. It is clear that, the higher the air temperature and lower the air humidity, the higher the system’s effectiveness: in these conditions infact, as higher waterflow is sprayed to the net, and most of it evaporate thanks to the energy given by the airflow through the net, water evaporates and air is cooled.
Relative humidity outdoor air
Ambient air temperature, dry bulb
Delta T inlet condenser coil temperature
Water consumption for 1000m³/h air flow
Table n.1 - Impact of Oasis on the condensation and operational limits
Water consumption comparison
|Adiabatic cooling kit coupled with an air cooled chiller (260 Kw @ 12/7°C, 35°C, 50% RH)||Cooling tower coupled with a water cooled chiller (260 Kw @ 12/7°C, 30/35°C, 50% RH)|
Another point to highlight is the water consumption, which is less than the 30% of the one that requested by a cooling tower coupled to a water cooled unit of the same cooling capacity.