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 | | EXTRA EFFICIENT COOLING FROM HOVAL | | | Hoval Ltd | | 12/07/2007 | | | Applications for new, patented adiabatic cooling system include shopping centres, sports facilities, offices, factories, warehouses and retail stores
The new AdiaVent indirect adiabatic comfort cooling unit from Hoval features a patented pre-cooling, twin heat exchanger design that increases cooling efficiency by 20%, compared to conventional systems, while retaining the environmental benefits of adiabatic cooling. Using an indirect design provides sensible cooling to the space and ensures that no moisture is added to the supply air, so moisture levels within the space are unaffected.
AdiaVent can be used as a stand-alone cooling unit – or it can be easily retrofitted to existing air conditioning systems to boost installed cooling capacity very cost-effectively. For a power input of just 3kW, it offers a cooling capacity of up to 21kW with an air flow of 6000m3/h and the ability to add up to 20% fresh air to the supply air before cooling.
AdiaVent is distinguished from other adiabatic coolers by its exclusive, patented two stage adiabatic cooling process, using a primary and secondary heat exchanger to achieve a ‘double pass’ for additional cooling. The secondary heat exchanger is used to pre-cool outside air, which then passes to the primary heat exchanger where it augments the adiabatic cooling of the supply air to achieve high efficiencies. The outside air is then discharged to the exterior so that there is no direct contact with room air.
Where required, AdiaVent can be supplied with an integral direct expansion coil and condensing unit to supplement the adiabatic cooling during times of peak cooling demand. Onboard controls ensure that the adiabatic cooling is used to its maximum potential so that energy performance is optimised.
Water from the humidifying sprays is treated to prevent limescale and Legionella and recirculated to minimise the overall water consumption of the unit. One of the scientific peculiarities of adiabatic cooling is that the temperature of the water does not influence the cooling effect, so recirculating the water in this way does not impair performance. | |
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