EXCOOL CHILLER ADVERTORIAL
FOCUS on COOLING
By utilising naturally available cooling mediums Excool is able to cool the air inside the data hall using minimal amounts of power.
Unlike other air systems Excool re- circulates and cools the air in the hall removing the need for sophisticated filtration and humidification, and reducing the contamination risk. In temperate climates such as the UK the need for mechanical cooling is normally removed completely.
When compared to chilled water and CRAC systems Excool is not only less expensive to install and maintain but also offers running costs savings of up to 95%. Excool have made advancements in well established heat exchange processes and optimised the design to suit the specific application of data centre cooling. The system takes advantage of free cooling from outdoor air all year. A simple transfer of heat from the hot indoor air to cold outdoor air is achieved by using air to air heat exchangers, with a unique and patented water absorbing outer surface.
Excool achieves the required cooling by a combination of dry air cooling when the ambient allows together with an advanced adiabatic evaporative effect to achieve low leaving temperatures. In warmer climates a fully integrated mechanical cooling module is added to the Excool unit. Because a greater proportion of cooling is achieved by heat transfer the electrical consumption of the mechanical cooling system is significantly less
MINIMAL ELECTRICAL POWER In addition to requiring only around 5% of the electrical power required for a conventional chiller/CRAC system, Excool also has exceptional advantages against an all ambient air free cooling system, namely the power required for the high level of filtration together with the avoidance of a humidification system. In addition an ambient free cooling system still requires mechanical cooling for the Summer season; this is not a requirement in temperate climates with Excool due to the advanced evaporation process employed.
Modular design up to 500kW cooling
RESILIENCE The only moving parts in the system are fans and pumps. Electronic devices include inverter drives and the unit controls. The adiabatic system employs run and standby pumps and run and standby high efficiency plug type re-circulating fans. The system has a low electrical demand that could be powered off the UPS and recovers instantly after power restore unlike a chiller which can require a ten minute period before restart. The recommended design for Excool would be to oversize two units rather than having an additional standby unit. If one unit fails the second unit ramps its fan speed to deliver all the required cooling.
LOW CAPITAL EXPENDITURE The Excool system is designed as an all air system without the need for mechanical cooling. The electrical infrastructure and back-up systems are far smaller with Excool requiring significantly less capital expenditure.
LOW OPERATING EXPENDITURE Typically a 2000kW IT load will require 12000 mWh hours of electrical energy to run the chilled water cooling system for one year in the UK. This figure can be reduced to as low as 600mWh using Excool, a saving of approximately £1.1 million per year.
The saving in carbon emissions is also very large. On a 2000kW IT load the saving is approximately 2800 tonnes CO2 per annum. With most of the developed nations plans to either increase or introduce new carbon taxation this is set to become a major financial consideration.
All motors are speed controlled to maximise effiency
LOW COST MAINTENANCE The Excool system requires routine maintenance of low grade filters and the replaceable water atomising nozzles only. All fan and motor bearings are sealed for life. An annual service to calibrate sensor settings is required.
LOWER BUILDING COSTS All the equipment is designed for external installation. This reduces the internal space required for mechanical plant as in the case of CRAC systems, reducing the building size and cost.
MECHANICAL COOLING In warmer, humid climates the design of Excool allows for the inclusion of a mechanical cooling system. This is a fully integrated arrangement that fits within the existing framework. It is complete with all wiring and controls and requires no work on site. As the Excool system has a greater capacity to reduce the supply temperature the DX system is significantly smaller than other systems.
Excool Ltd, Unit 15, Harris Industrial Park, Stoke Prior, Bromsgrove B60 4DJ
Phone: +44 1527 492750 Fax: +44 1527 492705
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