iACS - Experts in AHU Controls

The data center air-conditioning solution with the highest energy efficiency and lowest environmental impact The graph illustrates the climatic conditions in which the evaporative cooling, in case combined with a heat recovery unit, gives the opportunity to reach the temperature and humidity conditions as recommended bt ASHRAE and reduces significantly the mechanical cooling energy consumption. The green area (FC) represents the conditions in which it is possible to use the free cooling, the adjacent area (FC+MIX) describes the conditions in which it is necessary to mix the external air with the return air in order to keep the temperature under control. The area below (FC+MIX+HUMIDIFICATION) needs an additional adiabatic humidification to reach the minimum humidity set by ASHRAE. The blue area (DEC) identifies the initial external air conditions, suitable to reach the temperature set point with direct evaporative cooling DEC only! The yellow area (IEC) represents indir...

Data center air-conditioning Data center air-conditioning is essential for the correct operation of Information Technology equipment: processing and storage devices produce considerable heat that needs to be removed in order to maintain optimum operating conditions. Worldwide data center power consumption is estimated to be 30GW, accounting for around 1.5% of the earth's total electricity usage: as a result of this astonishing level of energy consumption, energy saving solutions are increasingly adopted. Currently the most widely implemented technological solution involves the use of Computer Room Air Conditioners (CRAC) or Close Controls Units (CCU), which cool and where necessary humidify the air in the data center. Continuous technological development in the sector and a constant focus on energy saving are reflected in the evolution of the air-conditioning solutions adopted: from controlling air distribution to installing air-conditioners, near the heat sources, a...

Compressed air humidifiers are the ideal humidification solution whenever a compressed air supply is available, as is the case in many industrial applications, even if humidification systems are often fitted with a dedicated compressor. The humidifier essentially consists of a cabinet fitted with electronic controller that, using two independent connection pipe networks, supplies the spray nozzles with compressed air and water at the ideal pressure for instant operating conditions. The units can be installed inside an AHU or directly in the room where humidity needs to be controlled. The greatest advantage of these atomisers is the minute dimensions of the droplets produced and their thorough mixing in the compressor air that, due to its speed, distributes the aerosol in the room and consequently allows quick absorption. These units can therefore be readily used for direct cooling in rooms, and are ideal for the textile industry, wood and paper processing, and storerooms, wh...

The humiFog can be used in the following configurations: Single zone for applications in AHUs, the pump operates at variable pressure with flow control, for precise and continuous modulation of humidification capacity. Multizone for applications in AHUs and in rooms, in which a pumping unit (master) supplies multiple distribution systems (up to 6). Water pressure is kept constant (70 bars), capacity is modulated in steps. The multizone configuration rationalizes the use of the humiFog pumping unit as, despite the lower precision due to stepped modulation (±5% against the ±2% guaranteed by the single zone solution), it can manage multiple zones at the same time, without having to install a pumping unit for each AHU or industrial environment. Direct humidification into rooms: humiFog multizones is the ideal system, as by keeping water pressure high (70 bars), each nozzle generates a cone of very fine droplets (average diameter 10 to 15 µm) that evaporate completely in ...

ChillBooster is made up of a pumping station and a water distribution and atomisation system: an electrical panel for ON/OFF control of capacity; a pump power supply solenoid valve; inlet water pressure switch; an impeller pump with incorporated pressure adjustment valve calibrated at 10 bars; outlet pressure gauge; high temperature protection heating valve; drain solenoid valve for unit shutdown; modular stainless steel manifolds with 20 mm diameter; atomiser nozzles; distribution system drain solenoid valves, at line end; corrugated steel flexible connection hoses; metal compression fittings; UV system for cleaning and disinfecting water inside the cabinet (optional). The pumping station is available in two versions: stainless steel version for demineralised water (recommended), or version for normal water with brass pump. Supply and top-up water ChillBooster can operate with untreated drinking water and with demineralised water. Following the evaporati...

Carel supplies a complete range of products that make use of the principles of evaporative cooling and all its advantages. The standard composition of these products is: - cabinet, containing the pump for pressurising the water, an inverter and an electronic controller for modulating the production of atomised water instant by instant; - atomiser nozzles, able to atomise the water into very fine water droplets (in the order of a few hundredths of a millimetre), extending the heat exchange surfaces. - distribution system, composed of stainless steel manifolds, atomiser nozzles and drain valves, in order to guarantee emptying. Advantages - energy saving: combines adiabatic humidification and evaporative cooling in a single global solution for energy saving within the AHU. - pressure loss management: optiMist guarantees real energy savings, assuring a very low pressure drop at the fans (30 Pa); -controlled atomisation: in order to completely exploit the potential of...

" Evaporative Cooling " is the process in which water cools the air through evaporation. For this to happen spontaneously, without the contribution of external energy, the water must be atomised in the air as very fine water droplets which, having a lower surface tension than the surrounding air, evaporate into the air. Why does the air cool down?  No contribution of external energy is necessary, however, owning to its nature, the water evaporation process requires a certain amount of energy. This energy is removed from the air itself which, in order to absorb the water must release sensible heat, thus lowering its own temperature. Every kilogram of water that evaporates absorbs 0.69 kW of heat from the air. This is how the dual humidification and cooling effect of the air is obtained through the Evaporative Cooling process, which in many air handling applications represent two desired effects. Energy Saving The rapid development of evaporative cooling in HVAC app...

humiSonic , installed on fan coils, is the ideal solution for coupling accurate control of ambient humidity with common temperature controls (guaranteed by fan coils). The combination and accurate management of these two fundamental features of the air assures that comfortable conditions in the home or commercial environment can be reached and maintained. Energy Saving Ultrasound humidification is adiabatic, requires very low power consumption compared to steam solutions (40W to atomise 0.5 kg?h of water). This important feature makes humiSonic an "Energy Saving" solution in line with modern energy saving expectations. Easy installation and maintenance Thanks to the compactness of its design humiSonic is easy to install in new generation fan coils and at the same time can be retrofitted on existing units! The maintenance of humiSonic consists only in periodic replacement of the transducers (once a year) and, thanks to the ergonomic design, this does not have ...

Atomiser for evaporative cooling optiMist is an evaporative humidifier and cooler that atomises water into very small droplets which, by evaporating spontaneously, extract heat from the water, atomizing it successively through special nozzles. The sophisticated control system combines the action of an inverter, which controls speed and therefore pump displacement, with that of 2 solenoid valves that activate only the nozzles necessary. This allows the system to always work at the best pressure for atomizing the water, within a wide flow rate range. The cooling effect of the air is due to the spontaneous evaporation of the water droplets: the change of state from liquid to vapor takes place at the expense of the energy in the air, which cools down as a consequence. optiMist is a complete system, which includes humidification and evaporative cooling in a unique solution, which can be used to handle air in an AHU (air handling unit), and to humidify the flow air...