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 to 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 must maintain a temperature of 25°C. Therefore, an insulated battery box was installed and a Dantherm DC Air Conditioner 450 was used to cool this compartment separately.

Traditional and less energy-efficient air conditioning is no longer necessary with the dual-zone cooling strategy, because it is no longer needed to cool the entire site. However, 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 cooling systems at 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          
Choosing a DC-powered cooling solution comes with the possibility of switching to emergency cooling in case of power outage. This will maintain operations, site up-time as well as avoid overheating and melt down.

For outdoor sites, dual-zone cooling can easily be implemented in combination 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 running costs
  • 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 the test data
  • The chosen solution has cut the operator's energy consumption for cooling by 70%


Profit check list

Will you benefit from a combined solution? We made a list of sites that are in the profit zone.

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