Print Page   |   Contact Us   |   Report Abuse   |   Sign In   |   Join the DCA
DCA Member Search
Event Calendar

07/06/2017 » 28/12/2017
Training & Education Courses in 2017

Top Contributors

DCA Member's Blog
Blog Home All Blogs
Please post data centre industry comments, experiences, ideas, questions, queries and goings-on here - to stay informed with updates, ensure you are subscribed by clicking the "subscribe" button.

 

Search all posts for:   

 

Top tags: Date Centre  Datacentre  efficiency  EMKA UK  central  Cooling  data  data centre  London  cloud  data centre security  Location  pue  swinghandles  connectivity  EMKA  energy-efficient computing  LDeX Group  air management  anti contamination  BioLock  data centre cleaning  data centre security;  disaster recovery  EU CODE of Conduct  infrastructure  planning  power  university of east london  building 

Air-side free-cooling: direct or indirect systems and their impact on PUE

Posted By Robert Tozer, Operational Intelligence Limited, 01 October 2015

There is a general perception that direct air systems are more cost efficient and hence the default option. However, providing the design incorporates good air segregation, recommended ASHRAE equipment environmental conditions and adiabatic cooling of the outdoor air, for most cities warmer than London, the indirect air systems are considerably more efficient than the direct air systems. This is because many more hours of free cooling can be achieved with adiabatic cooling without affecting the indoor conditions. Furthermore, zero-refrigeration in most of the world is possible with this solution. For cooler climates, direct systems are only marginally more efficient.

Often when data centre free cooling is discussed, people assume this means direct fresh air cooling. However, in climates warmer than London, indirect air systems are more efficient than direct air systems and can allow refrigeration to be eliminated and considerably reduce the electrical plant sizing requirements. Use of adiabatic evaporative cooling on the outdoor airstream allows free cooling to be achieved for many more hours in the year when there are hot, dry conditions. Further detail on the application for free cooling in data centres is available in our technical papers.

 

Tags:  air management  Cooling  Date Centre  Location  London  pue 

Share |
PermalinkComments (0)
 

Airedale International announces impending production launch of AireFlow™

Posted By Airedale International Air Conditioning, 07 November 2014
https://www.youtube.com/watch?v=J0PRuXclP5M

Airedale International announces impending production launch of AireFlow™ indirect fresh air free-cooling adiabatic air handling unit (AHU)


Leading British manufacturer of precision air conditioning systems, chillers, IT and comfort cooling solutions, Airedale International, will shortly be launching its production range of indirect fresh air free-cooling adiabatic air handling units (AHUs).

The AireFlow™ AHU is the result of close collaboration between the product development and engineering teams of both Airedale and UK market-leading manufacturer of custom-built air handling units, Barkell Ltd which became part of the Airedale group earlier in 2014.

With production launch set for autumn 2014, the AireFlow™ offers huge free-cooling potential and, being an indirect system, eliminates the risk of contaminated air entering the data centre. The use of fresh air as the predominant cooling source significantly reduces operational costs for users. In contrast with direct air handling units, indirect cooling solutions also reduce the dependency on back-up mechanical cooling required to prevent contaminated ambient air permeating the data centre. This ensures there is no requirement for internal air conditioning units, therefore maximising IT footprint.

The AireFlow™ will be available in five footprints between 100 and 440kW, each with two separate case sizes depending on whether roof or wall mounted connection is required.

High efficiency, electronically commutated (EC) centrifugal backward-curved fans draw return air from the data centre through the heat exchanger. Cooler air from the outside ambient is drawn through a separate air path within the heat exchanger, also by EC plug fans. This temperature difference drives heat exchange, with the supply temperature being managed through modulation of the ambient air flow rate. EC fan technology delivers improved efficiency, full modulation and reduced power consumption compared with AC fan equivalents, particularly at reduced running speeds.

At any point in the year, as climatic conditions dictate, moisture is added to the warm outdoor air which has the effect of lowering the dry bulb temperature. A typical UK peak summer day for example may have a dry bulb of 35°C with a wet bulb temperature of 21°C. By fully saturating the air, the dry bulb temperature can be reduced to 21°C. This lower air temperature is then used as a cooling medium and, based on London, UK ambient temperatures, could achieve ASHRAE recommended conditions using 100% free-cooling.

In more challenging environments, an optional mechanical cooling module will ‘top-up’ the cooling capacity with a partial DX supplementary cooling section.
An optional integrated fresh air inlet unit provides added installation benefits and reduced footprint compared with other makes of air handling unit in addition to maintaining room pressure and air quality. Air flow and pressure monitoring also allows filter and fan performance to be managed.

Other features of the AireFlow™ include: G3 filtration (return air), G4 filtration (ambient air intake), F7 filtration (fresh air inlet), optional contaminant filtration - NO₂, SO₂, H₂S (fresh air inlet), N+1 redundancy on EC fans and a highly intuitive touchscreen colour user display.

A fully working demonstration unit will be available on Airedale’s Stand No 312 at this year’s DatacenterDynamics, ExCel London ICC, 19 & 20 November 2014.

Watch the following cutting-edge animation that highlights the different operational modes of the AireFlow™ in varying ambient temperatures within a data centre application in the video attached

Tags:  air management  Cooling  Date Centre  efficiency 

Share |
PermalinkComments (0)
 

DCA Anti-Contamination Workshop Reminder

Posted By Kelly Edmond, 15 April 2014
Here's a reminder to all who may be interested in attending the DCA Anti-Contamination Workshop on Thursday 24th April 2014.

This is the annual review meeting for this specialist steering group. The group's aim is to discuss, advise and recommend practical solutions to the members of the Data Centre Alliance on the control of dust, dirt and contamination of the data centre. In particular, preventing damage to equipment; loss of data and conservation of energy. This workshop is to gain your views on what collaborative action(s) are required by the DCA. All members are welcome to contribute.

All details of the workshop are in the Event Calendar. Don't forget to RSVP! 



Tags:  air management  anti contamination  data centre cleaning  Date Centre  docklands  university of east london 

Share |
PermalinkComments (0)
 

Air Performance

Posted By Robert Tozer, Operational Intelligence Limited, 09 October 2012
There is a big difference between the installed capacity of CRAH units and what is actually delivered to IT equipment

Download File (DOCX)

Tags:  air management 

Share |
PermalinkComments (1)
 
Sign In
Sign In securely
News

Data Centre Alliance

Privacy Policy