How to Save with
Dual-Zone Cooling

By using a dual-zone climate control solution, Dantherm helped a large Telecom operator in southern Europe reduce their energy consumption by 70% for site cooling.

Dantherm was contacted by a large southern European Telecom operator with thousands of sites around the world.  They were using traditional air conditioning to cool their indoor sites but wanted a more energy efficient solution.  Each of the sites contained up to 16 batteries, which meant that a great deal of energy was needed simply to maintain the set temperature.

The operator was looking for a new way to cool the sites in order to save as much energy as possible and to cut the operational costs of the sites.  The operator brought Dantherm in as a technology advisor on the project to help improve energy efficiency.

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Tested Cooling Methods to Find the Best Solution
The Dantherm team approached the task by setting up four various test sites and one reference site to benchmark and determine which solution provided the best savings in terms of energy consumption.

After testing the different solutions, the operator decided to use dual-zone climate control - a strategy that divides a site into temperature zones in order regulate and differentiate the cooling.

Battery Compartment Cooling and Raised Shelter Temperature
The dual-zone climate control solution uses the Dantherm Flexibox 810, which is a -48V DC free cooling solution that maintains a target temperature of 35°C in zone 1.  This means that the Flexibox simply removes excess heat when it exceeds the set 35°C.

The temperature sensitive batteries placed in zone 2 are to maintain a temperature of 25°C.  Therefore, they installed an insulated battery box that uses Dantherm's DC Air Conditioner 450 to cool this compartment separately.

Traditional and less energy-efficient air conditioning is no longer necessary with the dual-zone cooling strategy because with this system, it is no longer needed to cool the entire site.  However, the traditional air conditioning is kept on site in order to have a back-up system.

Significant Energy Savings
The operator is in the process of changing the cooling system in their sites.  Since they started using the dual-zone cooling strategy, they are now reporting a 70% reduction in the energy consumption for cooling on the sites where they have implemented the solution.

Emergency Cooling and Site Uptime as an Added Advantage          
When choosing DC powered cooling solutions for the site, it comes with the advantage of making it possible to switch to emergency cooling in case of a power outage.  This will help maintain operations, site up-time as well as avoid overheating and melt down.

While Dantherm has helped implement this solution in the operator's indoor sites, the dual-zone cooling can easily be utilized for outdoor sites with a Dantherm Heat Exchanger or DC Air Conditioner.

The Case in Brief

  • A large Telecom operator was looking for a way to reduce energy consumption and cut costs to run its many sites
  • The operator was using traditional air conditioning and was looking for alternative cooling solutions
  • Dantherm served as technology partner on the project and tested four different solutions.   The operator selected a dual-zone cooling strategy based on this test data.
  • The chosen solution has cut the operator's energy consumption for cooling by 70%


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About battery compartment cooling: dual-zone cooling

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