© Dantherm A/S

SUSTAINABLE OFF-GRID COOLINGHow DC air conditioning manages common challenges related to cooling off-grid and hybrid Telecom sites

© Dantherm A/S

Select the text,

”Hyperlink” select

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

WWW.DANTHERM.COM

© Dantherm A/S

True DC Air Conditioning- In short

Designed specifically for Telecom and electronics cooling

Application options:

off-grid and hybrid sitessites with unstable power supplysites powered by renewable energy sourcesgenerator-powered sitesfor dual climate zone setupsbattery cabinets and compartmentsnew and legacy sitestemporary/mobile sitesstand-alone or combined with other cooling solutionssplit and monoblock installations

WWW.DANTHERM.COM

© 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 securityPurely DC-powered, built to run on battery backup

No power loss in conversionRuns purely on DC power – no inverter

Lower power consumptionVery low inrush current, capacity-controlled operation

Minimum hot spotsHigher internal air flow

Easy installationPlug-and-play

Cost-efficient dimensioningSmaller power system requirements

Minimum maintenanceHigh-quality, long-lasting compressor and fans

Longer product life time10+ years

WWW.DANTHERM.COM

© Dantherm A/S

Select the text,

”Hyperlink” select

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

© Dantherm A/S

Select the text,

”Hyperlink” select

SUSTAINABLE OFF-GRID COOLING- Find your site

UNSTABLE

GRID POWER

RENEWABLE

ENERGY

DIESEL

GENSETS

BATTERY

BANKS

MOBILE

SITES

WWW.DANTHERM.COM

© Dantherm A/S

Inverter based = power loss in conversionHigh energy consumption: high inrush currentShort service life: start-stop operationCost-intensive protection of battery backupShort battery life: energy-intensive operation

No inverter = no power loss in conversionMinimal power consumption: low inrush currentLong service life: capacity-controlled operation Cost-effective protection of battery backupLong battery life: minimal energy requirements

AC AIR CONDITIONING

Is this your site? - Unstable/intermittend power supply

DC AIR CONDITIONING

WWW.DANTHERM.COM

© Dantherm A/S

Is this your site? - Renewable energy sources

AC AIR CONDITIONING

DC AIR CONDITIONING

Inverter based = power loss in conversionHigh energy consumption: high inrush currentShort service life: start-stop operationCost-intensive protection of battery backupShort battery life: energy-intensive operationLarge-scale solar panels/battery bank needed

No inverter = no power loss in conversionMinimal power consumption: low inrush currentLong service life: capacity-controlled operation Cost-effective protection of battery backupLong battery life: minimal energy requirementsSmaller-scale solar panels/battery bank needed

WWW.DANTHERM.COM

© Dantherm A/S

Is this your site? - Diesel genset power supply

AC AIR CONDITIONING

Inverter based = power loss in conversionHigh energy consumption: high inrush currentShort service life: start-stop operationCost-intensive protection of battery backupShort battery life: energy-intensive operationLarge-scale generator needed

Even idle operation is over-dimensionedand leads to high costs per kWh

DC AIR CONDITIONING

No inverter = no power loss in conversionMinimal power consumption: low inrush currentLong service life: capacity-controlled operation Cost-effective protection of battery backupLong battery life: minimal energy requirementsSmaller generator required

Minimum costs per kWh

WWW.DANTHERM.COM

© Dantherm A/S

Is this your site? - Dual climate zones/battery compartments

AC AIR CONDITIONING

DC AIR CONDITIONING

Inverter based = power loss in conversionHigh energy consumption: high inrush currentShort service life: start-stop operationCost-intensive protection of battery backupShort battery life: energy-intensive operationLarge-scale battery bank needed

No inverter = no power loss in conversionMinimal power consumption: low inrush currentLong service life: capacity-controlled operation Cost-effective protection of battery backupLong battery life: minimal energy requirementsSmaller-scale battery bank needed

WWW.DANTHERM.COM

© Dantherm A/S

Is this your site? - Temporary/mobile sites

AC AIR CONDITIONING…

DC AIR CONDITIONING

Inverter based = power loss in conversionHigh energy consumption: high inrush currentShort service life: start-stop operationCost-intensive protection of battery backupShort battery life: energy-intensive operationLarge-scale battery bank needed

No inverter = no power loss in conversionMinimal power consumption: low inrush currentLong service life: capacity-controlled operation Cost-effective protection of battery backupLong battery life: minimal energy requirementsSmaller-scale battery bank needed

WWW.DANTHERM.COM

© Dantherm A/S

Select the text,

”Hyperlink” select

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

© 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

WWW.DANTHERM.COM

© 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 whenneeded 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.

WWW.DANTHERM.COM

© Dantherm A/S

Select the text,

”Hyperlink” select

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

© Dantherm A/S

This Telecom operator reduced energy consumption by 70% for site cooling

Location: Turkey, Southern EuropeExisting solution: traditional air conditioningMain issues: high running costs, cost-intensive battery compartment coolingNew 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 1DC Air Conditioner maintains a target temperature of 25°C inside an insulated battery box in zone 2The 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

WWW.DANTHERM.COM

© 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 EastExisting solution: traditional air conditioningMain issues: high running costs, battery compartments, extreme environmentNew solution: DC air conditioning, free cooling, existing air conditioning

Extensive testing proved the following combination to create the best results:

Existing air conditioningFree cooling with air inlet protectionDC 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

WWW.DANTHERM.COM

© Dantherm A/S

This Telecom operator significantly reduced costs and increased site uptime

Location: South AfricaExisting solution: split AC air conditioningMain issues: battery compartments, extreme environment, unstable power, vandalismNew 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 cabinetTransmission 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

WWW.DANTHERM.COM

© Dantherm A/S

This technology brief was presented to you by Dantherm Preferred partner for electronics cooling

Industry expertsWide range of Dantherm-developed, industry-customized solutions900,000+ installationsIn more than 50 countries

Complete climate controlEnergy-efficient electronics cooling for shelters, cabinets, enclosures and roomsEnergy-optimized control strategiesReduced carbon footprint

Multiple application optionsAll types of climatesChallenging environmentsOn-grid and off-gridNew and legacy sitesRemote sites

Why does capacity-control make a difference? Download the free white paper to learn more…

THANK YOU FOR YOUR ATTENTION

WWW.DANTHERM.COM