The Effect of Free Cooling on Reducing Total Energy Consumption
for Telecommunication Base Stations
The Effect of Free Cooling on Reducing Total Energy Consumption
for Telecommunication Base StationsEhsan B. Haghighi PhD, Thermal
Specialist Dantherm Cooling AB, Sweden
INTELEC 2015, Osaka, Japan
Dantherm A/STitle of presentation DD/MM/YY Author
Confidentiality levelI have the best power system! I have the best
battery technology! I have the most optimum power conversion
technique! I have the best recovery and mitigation system! I have
the highest quality ICT equipment! But I still need something else
to guarantee I am running my system! What do I need to run a
telecommunication base station (BTS)!?
Dantherm A/S
COOLING!
Dantherm A/SIntroductionSimplified energy model A case study
ResultsConclusion
Content
Dantherm A/STypical air conditioning system and total energy
consumption in a BTS
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Dantherm A/SRe-designing building envelopesImproving air
conditioning systemsOptimizing indoor air flow distributionAdding
monitoring and controlling unitsImproving energy management and
using renewable energy sources
and ...
Sharing the cooling load between air conditioning and free
cooling systems Energy reduction strategies
Dantherm A/SWhat is free cooling?
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How does it work
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Sharing free cooling and air conditioning systems!
Dantherm A/S
10How does it work
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A simplified energy model
HVAC engineer's handbook and ASHRAE Handbook Fundamentals
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Dantherm A/SControlling strategy
if TSET Air Conditioning if TSET>TO => Free
CoolingAssumption: the effect of mixing the fresh air with the warm
indoor air already inside the envelope is ignored
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Dantherm A/SA case study
L=4 m, W=3 m, and H=2.8 mQIT=4 kW and U=1.5 W/m2Knumber of air
changes = 1.5 per hour TSET=25 C
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Dantherm A/SLocations
Copenhagen (Denmark)San Francisco (USA)Shanghai (China)Dubai
(UEA)Weather data: ASHRAE (for 0.4% cumulative frequency of
occurrence)
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Dantherm A/SResults: Copenhagen (Denmark)
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Dantherm A/SResults: San Francisco (USA)
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Dantherm A/SResults: Shanghai (China)
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Dantherm A/SResults: Dubai (UEA)
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Dantherm A/SResults: the effect of indoor set temperature
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Dantherm A/SResults: the effect of building materials
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Dantherm A/SNot only direct Free cooling, but also indirect free
cooling such as:
Heat exchangersthermosiphons
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How does it work
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How does it work
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New cooling solutions to improve energy management in BTSs are
necessary. Fresh outdoor air (either direct: a fan or blower, or
indirect: air-to-air or thermosiphon heat exchangers) to cool IT
equipment is efficient and cost-reducing in many places all over
the world. By increasing the indoor set point temperature the share
of free cooling and savings can be increased.
Conclusion
Dantherm A/SEhsan B. Haghighi PhD, Thermal Specialist Dantherm
Cooling AB, Swedenhttps://www.dantherm.com [email protected]
Thanks a lot for your attention!
Dantherm A/S
