Indirect Adiabatic and Evaporative Data Center Cooling
Developed in response to the broadening of the ASHRAE recommended server inlet temperature envelope in 2008, Excool represents the most advanced technology of its kind. Unique in its approach Excool is able to cool data centers with year round full or partial free cooling. Mechanical cooling is only required to top-up the partial cooling element only when the outdoor temperature is excessively high. The successful initial application of the technology and first of its kind in the UK in 2011 has been followed by installations by leading global DC providers and end users.
The system uses outdoor air to indirectly cool the indoor air supply removing the data center heat via a specially designed PVC heat exchanger. Heat transfer is achieved without the outdoor air entering the building. Therefore outdoor hazards such as fire, air pollution and salt aerosol are kept out of the building. Excool Services Our range of services include: Maintenance Remote Monitoring Recording and evaluation of consumption values Device optimisation Own test laboratory for factory acceptance tests and product development
Data Centre Winter Operation Air returning from the data hall is drawn through the heat exchanger by ECDC plug fans. Cool outdoor air is drawn through a second air path in the heat exchanger by additional ECDC plug fans. Ambient air Datercentre Return and Supply air Heat Exchanger Summer Operation Moisture is added to the hot outdoor air which How it works has the effect of lowering the air temperature temperature. A typical peak summer day may have a dry bulb of 95 o F with a wet bulb temperature of Data Centre Excool have optimised air to air heat exchanger technology specifically for the application of adiabatic and evaporative cooling in data centers. Excool s unique heat exchanger is manufactured from a Hot return air from data hall 70 o F. By fully saturating the air the dry bulb temperature can be reduced to 70 o F. This reduced temperature air is then used as a cooling medium to remove the heat from the data center. Ambient air Datercentre Return and Supply air Heat Exchanger Adiabatic composite material which unlike the more commonly used aluminium, makes it resistant to corrosion, more robust and leak tight. The Excool adiabatic and evaporative cooling system has been developed specifically for the product and is highly efficient both in terms of its ability to saturate the outdoor air fully and in its water use. Supply air temperature is controlled by a modulating outdoor air volume, water use and, when required, mechanical cooling. Cool outdoor air Optional DX Module In more challenging environments it may be necessary to top-up the cooling capacity with a partial DX supplementary cooling section. This is an integrated module and is designed to supplement the heat exchangers. It is sized as a small percentage of the overall cooling load. Data Centre Ambient air Heat Exchanger Datercentre Return and Supply air Adiabatic Compressor
Lower Operating Costs High Quality Construction Lifetime anti Corrosion Warranty Reduced Electrical Infrastructure The reduction in the dependency on mechanical cooling has a major impact on the size and cost of the electrical infrastructure. When considering the lower capacity requirement of the electrical to mechanical power loads, the plant, equipment and machinery power infrastructure is reduced. Diesel generator Electrical distribution Diesel storage Switchgear etc Transformer 500 400 300 200 100 Excool Total Input Power (kw) Chilled Water Direct Air 0 Based on 1MW IT load, N+1 resilience and ASHRAE Recommended temperature envelope. Cooling Only PUE Typical cooling only ppue for a 1MW data hall in Dallas based on 75 o F supply, 97 o F return, 75% average annualised demand and N+1 resilience would be 1.078. Typical cooling only ppue for the same data hall in Boston is 1.057 ppue This is calculated by analysing the systems energy requirements for every one of 8670 hours of temperature data for the typical reference year published by ASHRAE. It assumes the average load throughout the year is at 75% and that all units including the standby unit are operational. The Excool product uses high quality components and materials to ensure long term reliability and resistance to corrosion. The product is provided with a lifetime warranty against corrosion. Stainless steel framework and support structures are used throughout the unit. Outer panels are a composite of PVC and aluminium. The air movement is achieved using high efficiency ECDC fan and motor assemblies and the system pumps use robust stainless steel internal components for long life. Compact and Lightweight The technologically advanced design and use of high grade materials results in an industry leading unit size and weight. Typical footprint and weight per kw of cooling output are; Water Treatment The system is complete with on board water treatment. A clean potable water supply is required for normal operation and maintenance intervals. The units have an automatic drain down and purge cycle to ensure all areas of potential bacterial growth are removed. The system also employs cartridge based biological filters and scale inhibiting system. Main base frame Stainless steel Outer panel framework Aluminium pentapost Main external panels painted aluminium outer skin with composite inner skin Internal panels Stainless steel Heat exchanger outer frame Stainless Steel Heat exchanger support frame Stainless steel Drip tray stainless steel Heat Exchanger Composite material medium to remove the heat from the data centre. 2.3kW per square foot footprint 72 pounds per square foot without water storage 157 pounds per square foot typically including integrated water storage tank.
Witness Testing and Validation Integrated Water Storage 24 hr water Store Excool has committed significant financial resource to enable clients to see the product operating in simulate environmental conditions. Equipment manufactured for specific projects can be 31.5 Typically 31.5 inches High On Board Bacterial Control fully witness tested under full heat and temperature loads at site based ambient conditions to validate thermal and acoustic performance. Water flows through tank Typical less than 156.6 pounds per square foot combined load The test facility is located at the company s UK headquarters with demonstration facility soon to be opened in the US.
2009 Test Lab I opened Working prototype 2010 On-going R & D Breakthrough in HEAT EXCHANGER technology 2011 Excool installed on 9MW data center 2012 Excool installed on 6MW data center in The Netherlands 2013 New test Lab II opened Excool awarded contracts for on-going 46MW data centers 2014 Excool installed in data centers 100MW + installations in Norway and Sweden BRILL award from the Uptime Institute using Excool s cooling technology New 600KW 400m² customer demo test facility opened Profile Park achieves Tier III Certification using Excool technology, the only compressor free indirect adiabatic cooled data center in the World to achieve this LONDON2 achieves Tier III Design Certification of Design Documents using Excool technology Creation of Excool GmbH 2015 Excool installed in Docklands 5.4MW multi-storey/ 7 floor building First installation in Germany Excool GmbH wins at the ECO Internet Awards 2015 under the Data Centre / Hosting / Housing category 2016 Excool expands its market into South America Excool win Cooling Entrepreneurial Company of the year award by Frost & Sullivan 2017 Creation of Excool Inc. Development of unit for the American market with UL Certification Contact us Excool Ltd Cooper House, Corbett Business Park, Shaw Lane, Stoke Prior, Bromsgrove, Worcestershire B60 4EA t +44 (0) 1527 492750 e info@excool.com w www.excool.com