HOW TO SUCCESSFULLY APPLYFREE COOLING IN THE DESERT/CASE STUDY AND PERFORMANCE RESULTS

how to successfully apply free cooling in the desert/case study and performance results

what was the challenge?

Etisalat, leading Telecom operator in the Middle East, wanted to reduce energy consumption on cooling by 20% without compromising on performance and safety. Learn how this test of Dantherm Free Cooling and AirMazepat.

pend. air inlet protection made the Etisalat professionals pinch themselves to believe the results.

WHAT YOU NEED TO KNOW - IN BRIEF

how did we solve this?

Dantherm Flexibox Free Cooling was installed as an add-on to the existing air conditioner. The total power con-sumption of the two units was compared to the power consumption of running with the air conditioner only. Also, the site was tested for sand intrusion, especially after sandstorms, and performance during power outage.

49% annual kwh savings

The confirmed average kWh savings for April 2015 to March 2016 came to 49%. Additionally, the installation successfully protected the internal environment from a major sandstorm and ensured site operation during power outage.

how to successfully apply free cooling in the desert/case study and performance results

CUSTOMER STATEMENTS

>>After 12 months of trial, we can confirm that the total average energy savings for the site are 49%. This is much higher than expected and we were surprised to see savings even during the hottest

months of the year. With these results, we will have ROI in less than 2 years. We strongly recommend this solution and plan to use Dantherm Free Cooling for

our sites in the region<<

- Salem Al Mannaei, VP/Infrastructure Management at Etisalat Group

>>The shelter survived a major sandstorm in April 2015. Not even fine dust entered, because of

the Dantherm air inlet protection device. We use Dantherm free cooling because of the energy savings and security of operation. Also, Dantherm is always

on the look-out to develop something better. We like their innovative attitude and they offer reliable

technology<<

- Khalid Abdel Gadir Ginawi,Engineer at Etisalat Facility Management

how to successfully apply free cooling in the desert/case study and performance results

test site setup

how to successfully apply free cooling in the desert/case study and performance results

capacities & performance

Monthly performance & savingsTest period 2015-2016 April May June July August September October November December January February March

Air Conditioner only, kWh 1649 1953 1688 1745 1688 1745 1745 1688 1745 1745 1576 1745

Air Conditioner + Flexibox Free Cooling, kWh 876 1616 1458 1529 1460 1227 944 465 173 157 229 543

Savings, kWh 773 337 230 216 229 518 801 1223 1572 1588 1347 1202

Savings, pct. 47 % 17 % 14 % 12 % 14 % 30 % 46 % 72 % 90 % 91 % 85 % 69 %

38 %

Air Conditioner only

Air Conditioner +Flexibox Free Cooling

49%avg. kwh savings

total running hours Air Conditioner:

Flexibox Free Cooling:2443

3965

200 W3500 W

Power consumption Flexibox Free Cooling: Air Conditioner:

62 %

kWh

how to successfully apply free cooling in the desert/case study and performance results

proof of conceptsandstorm protection

The Dantherm AirMazepat.pend. comes in two versions, the AirMaze Panel and AirMaze Cube, both part of the cooling setup of this case. The two versions are instal-led at the air intake and outlet. Coarse-grained sand is trapped in the AirMaze and fine-grained sand will be caught in the filter.

On 2 April 2015, a major sandstorm hit the test site, creating a critical test in terms of proving the func-tionality of the AirMaze. The picture on the left was taken in the morning on April 2nd as the storm hit the streets of Dubai. This severe sandstorm lastet for just over two days.

>>The shelter survived the sandstorm very well. The shelter inside was kept clean - not even fine dust entered<<, says Khalid Abdel Gadir Ginawi, Engineer at Etisalat Group. This picture of air inlet and fan on the inside of the shelter door was taken just after the sandstorm with no prior cleaning.

proof of conceptpower outage protection

On 3 September 2015, the test site was subject to a major power failure. The outdoor temperatures were

appr. 40oC. The site data showed that the indoor tempe-rature increased by 3oC/10 min. If only an air conditioner had been installed, being powered by the AC mains, this

would have continued until site shutdown.

The Flexibox Free Cooling system controls the entire site cooling activities. Normally, the above situation would shut down a site at internal temperatures above 50oC.

In this situation, the Flexibox system activated emergen-cy mode at 39oC and thus maintained normal operation

of the shelter throughout the power failure.

The Flexibox features an intelligent control system, which allows for remote control, monitoring and setting of

parameters. This way, the engineers at Etisalat Group are constantly connected with the test site in Dubai.

They can change settings, view performance and extract data at any time.

www.dantherm.com

Why Free Cooling in the desert?

Applying ambient air cooling in a climate with extremely hot temperatures and a constantly high level of sand in the air sounds

both ridiculous and expensive. Why even try?

Because Free Cooling remains the most energy-efficient cooling method and the highest savings generator within

electronics cooling.

That is why Dantherm has developed an electronics cooling soluti-on, which utilizes the advantages of Free Cooling and protects the shelter from sand intrusion at the same time: Dantherm Flexibox

Free Cooling with AirMazepat.pend. air inlet protection.

Copyright © 2015 by Dantherm cooling A/SAll rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law.