How true DC air conditioning manages common challenges related to cooling off-grid and hybrid Telecom sites. Highly user-focused presentation (interactive version available - please follow link in presentation).

1. © Dantherm A/S
SUSTAINABLE OFF-GRID COOLING
How DC air conditioning manages common challenges
related to cooling off-grid and hybrid Telecom sites

2. © Dantherm A/S
SUSTAINABLE OFF-GRID COOLING
- Contents
1 True DC Air Conditioning: in short
2 Is this your site? General challenges and solutions
3 Combine with existing installations – boost your earnings
4 Case studies: proof of concept
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3. © Dantherm A/S
True DC Air Conditioning
- In short
Designed specifically for Telecom and
electronics cooling
Application options:
off-grid and hybrid sites
sites with unstable power supply
sites powered by renewable energy sources
generator-powered sites
for dual climate zone setups
battery cabinets and compartments
new and legacy sites
temporary/mobile sites
stand-alone or combined with
other cooling solutions
split and monoblock installations
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4. © Dantherm A/S
True DC Air Conditioning
- In short
Used in indoor/outdoor enclosures and compartments,
shelters, radio base stations, power supply cabinets
Compared with conventional AC air conditioners,
DC air conditioners maintain stable cooling with:
Higher operational security
Purely DC-powered, built to run on battery backup
No power loss in conversion
Runs purely on DC power – no inverter
Lower power consumption
Very low inrush current, capacity-controlled operation
Minimum hot spots
Higher internal air flow
Easy installation
Plug-and-play
Cost-efficient dimensioning
Smaller power system requirements
Minimum maintenance
High-quality, long-lasting compressor and fans
Longer product life time
10+ years
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5. © Dantherm A/S
1 True DC Air Conditioning: in short
2 Is this your site? General challenges and solutions
3 Combine with existing installations – boost your earnings
4 Case studies: proof of concept
SUSTAINABLE OFF-GRID COOLING
- Contents
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6. © Dantherm A/S
SUSTAINABLE OFF-GRID COOLING
- Find your site
UNSTABLE
GRID POWER
RENEWABLE
ENERGY
DIESEL
GENSETS
BATTERY
BANKS
MOBILE
SITES
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7. © Dantherm A/S
Inverter based = power loss in conversion
High energy consumption: high inrush current
Short service life: start-stop operation
Cost-intensive protection of battery backup
Short battery life: energy-intensive operation
No inverter = no power loss in conversion
Minimal power consumption: low inrush current
Long service life: capacity-controlled operation
Cost-effective protection of battery backup
Long battery life: minimal energy requirements
AC AIR CONDITIONING
Is this your site?
- Unstable/intermittend power supply
DC AIR CONDITIONING
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8. © Dantherm A/S
Is this your site?
- Renewable energy sources
AC AIR CONDITIONING
DC AIR CONDITIONING
Inverter based = power loss in conversion
High energy consumption: high inrush current
Short service life: start-stop operation
Cost-intensive protection of battery backup
Short battery life: energy-intensive operation
Large-scale solar panels/battery bank needed
No inverter = no power loss in conversion
Minimal power consumption: low inrush current
Long service life: capacity-controlled operation
Cost-effective protection of battery backup
Long battery life: minimal energy requirements
Smaller-scale solar panels/battery bank needed
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9. © Dantherm A/S
Is this your site?
- Diesel genset power supply
AC AIR CONDITIONING
Inverter based = power loss in conversion
High energy consumption: high inrush current
Short service life: start-stop operation
Cost-intensive protection of battery backup
Short battery life: energy-intensive operation
Large-scale generator needed
Even idle operation is over-dimensioned
and leads to high costs per kWh
DC AIR CONDITIONING
No inverter = no power loss in conversion
Minimal power consumption: low inrush current
Long service life: capacity-controlled operation
Cost-effective protection of battery backup
Long battery life: minimal energy requirements
Smaller generator required
Minimum costs per kWh
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10. © Dantherm A/S
Is this your site?
- Dual climate zones/battery compartments
AC AIR CONDITIONING
DC AIR CONDITIONING
Inverter based = power loss in conversion
High energy consumption: high inrush current
Short service life: start-stop operation
Cost-intensive protection of battery backup
Short battery life: energy-intensive operation
Large-scale battery bank needed
No inverter = no power loss in conversion
Minimal power consumption: low inrush current
Long service life: capacity-controlled operation
Cost-effective protection of battery backup
Long battery life: minimal energy requirements
Smaller-scale battery bank needed
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11. © Dantherm A/S
Is this your site?
- Temporary/mobile sites
AC AIR CONDITIONING…
DC AIR CONDITIONING
Inverter based = power loss in conversion
High energy consumption: high inrush current
Short service life: start-stop operation
Cost-intensive protection of battery backup
Short battery life: energy-intensive operation
Large-scale battery bank needed
No inverter = no power loss in conversion
Minimal power consumption: low inrush current
Long service life: capacity-controlled operation
Cost-effective protection of battery backup
Long battery life: minimal energy requirements
Smaller-scale battery bank needed
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12. © Dantherm A/S
1 True DC Air Conditioning: in short
2 Is this your site? General challenges and solutions
3 Combine with existing installations – boost your earnings
4 Case studies: proof of concept
SUSTAINABLE OFF-GRID COOLING
- Contents
WWW.DANTHERM.COM

13. © Dantherm A/S
Existing installations and DC air conditioning
- Combinations that will boost your earnings
Sometimes, all your cooling solution needs to
be truly cost-effective is a teammate
Adding DC air conditioning to your existing
solution will make your running costs drop
and increase your earnings
Find your existing solution on the next slide,
to see your ideal combination
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14. © Dantherm A/S
Existing installations and DC air conditioning
- Combinations that will boost your earnings
WHAT WHERE WHY
Free Cooling
+ DC Air Conditioning
Sites powered by renewable energy,
where the outside temperature
varies from above to below cooling
set point.
DC Air Conditioning is the most
energy and cost-efficient way of
maintaining low inside temperatures,
when the ambient temperature is too
high to use free cooling.
Air Conditioning
+ DC Air Conditioning
(dual-zone cooling)
Remote locations / sites powered by
renewable energy / sites with
temperature-sensitive equipment
which requires low cooling set
points, e.g. battery compartments.
Maintains dual climate zones to keep
running costs low + extends service
life of existing air conditioners (only
activated when needed to maintain
internal temperature set point).
Heat Exchange/
Thermosiphon
+ DC Air Conditioning
Challenging environments, e.g.
coastal areas + sites with
temperature-sensitive equipment
which requires low cooling set
points, e.g. battery compartments.
Maintains dual climate zones to keep
running costs low + extends service
life of existing Heat Exchangers /
Thermosiphons (only activated when
needed to maintain internal
temperature set point).
Displacement Free Cooling
+ DC Air Conditioning
Any small room with stagnant indoor
air, where the outside temperature
varies from above to below cooling
set point.
DC Air Conditioning is the most
energy and cost-efficient way of
maintaining low inside temperatures,
when the ambient temperature is too
high to use free cooling.
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15. © Dantherm A/S
1 True DC Air Conditioning: in short
2 Is this your site? General challenges and solutions
3 Combine with existing installations – boost your earnings
4 Case studies: proof of concept
SUSTAINABLE OFF-GRID COOLING
- Contents
WWW.DANTHERM.COM

16. © Dantherm A/S
This Telecom operator reduced energy
consumption by 70% for site cooling
Location: Turkey, Southern Europe
Existing solution: traditional air conditioning
Main issues: high running costs, cost-
intensive battery compartment cooling
New solution: DC air conditioning, free
cooling, existing air conditioning
After testing different solutions, the operator
decided on a strategy which divides the site
into temperature zones
Dual-zone climate control:
Free Cooling maintains a target temperature
of 35°C in zone 1
DC Air Conditioner maintains a target
temperature of 25°C inside an insulated
battery box in zone 2
The existing air conditioner was maintained
at the site for backup in zone 1
Read the full case study on
www.dantherm.com/dualzonesavings
Cooling costs reduced by 70%
Case studies
- How to save with dual-zone cooling
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17. © Dantherm A/S
This Telecom operator created continuous
savings with ROI in maximum 3 years - by
adding to an existing air conditioning solution
Location: Middle East
Existing solution: traditional air conditioning
Main issues: high running costs, battery
compartments, extreme environment
New solution: DC air conditioning, free
cooling, existing air conditioning
Extensive testing proved the following
combination to create the best results:
Existing air conditioning
Free cooling with air inlet protection
DC air conditioning
Using this combination in a dual-zone cooling
strategy, the operator generate substantial,
continuous savings and achieved ROI in just
under three years
Read the full case study on
www.dantherm.com/stophighrunningcosts
ROI in maximum 3 years
Case studies
- Put a stop to high running costs
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18. © Dantherm A/S
This Telecom operator significantly reduced
costs and increased site uptime
Location: South Africa
Existing solution: split AC air conditioning
Main issues: battery compartments, extreme
environment, unstable power, vandalism
New solution: DC air conditioning
Based on site analysis, the operator decided to
split up cooling and ventilation:
Batteries were placed in a DC-powered
outdoor cabinet
Transmission equipment was placed in a
ventilated indoor cabinet
This resulted in lower energy consumption, a
solution safer from vandalism (indoor mounted
DC air conditioner) and protection from the
extreme ambient environment (closed loop
cooling).
Read the full case study on
www.dantherm.com/saveenergy
Savings and increased uptime
Case studies
- Saving energy in off-grid battery banks
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19. © Dantherm A/S
This technology brief was presented to you by Dantherm
Preferred partner for electronics cooling
Industry experts
Wide range of Dantherm-developed, industry-customized solutions
900,000+ installations
In more than 50 countries
Complete climate control
Energy-efficient electronics cooling for shelters, cabinets, enclosures and rooms
Energy-optimized control strategies
Reduced carbon footprint
Multiple application options
All types of climates
Challenging environments
On-grid and off-grid
New and legacy sites
Remote sites
Why does capacity-control make a difference?
Download the free white paper to learn more…
THANK YOU FOR YOUR ATTENTION
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