The document discusses how free cooling units can reduce carbon emissions and energy costs for telecom sites. It states that free cooling units can reduce CO2 emissions and energy consumption by up to 95% compared to traditional compressor cooling. Free cooling units are well-suited for retrofitting in telecom shelters and sites that use generators. The technology takes advantage of outside air cooling to reduce reliance on compressor cooling and refrigerants. This can lower operating expenses by 50-95% annually depending on climate conditions.

1. Free-Cooling & the CO2-Impact
How to reduce the Carbone foot print
Energy & fuel costs
The free cooling units or “green cooling” units are designed especially to be installed on day 1
or to be retrofitted in the Telecom sites (bases stations) where the compressor cooling (using
CFC, HCFC or HFC refrigerants) causes high CO2 emissions and operating costs in the whole
world.
To remove the heat out of the telecom base stations (UMTS & GSM) networks, operators can
reduce up to 95 % of the effective CO2-emissions & energy consumption thus cutting drastically
the OPEX of Base Stations in operation world wide.
Where to use the Free-cooling units
1. can be retrofitted especially on Telecom-Shelters
2. operating with comfort Air conditioning units (using CFC, HCFC or HFC refrigerants)
3. where 24 hours generator powered sites where the fuel costs are increasing day
4. to banish completely Air-Cons with Refrigerants out of the Telecom Networks using pure
free cooling
The units take the monitoring of the Split-units over and they manage the reduced cooling
operation of the BTS and its CO2-emissions

2. The cooling for the shelter will be done mainly via direct (outside Air) free cooling. Compressor
cooling will be not more used (except countries with high ambient temperatures in the summer
over 35 °
C).
The reduction of the & energy costs can reach 95 % of OPEX (depending from the climate
condition of the country)
Example:
North Europe (nearly 90 % reduction of the CO2-emissions) though the retrofit of the shelter &
using now the free cooling instead of the compressor cooling
Freecooling Box ONLY
FCB with Split
400 Split Comfort ONLY
350
300
250
kWh 200
150
100
50
0
-7
-5
-3
-1
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
Advantages:
- Reduction of the CO2-emissions
- Reduction of the operating costs (Energy)
- Reduction of the fuel costs (Generators)
- Redundancy and Reliability of the base station
- Control of the running time of the existent split comfort unit
- Emergency ventilation
- No refrigerant emissions contributing to global warming or ozone depletion
Results:
• Reduction of the CO2-emissions & operating costs 50 - 95 % yearly (depending from the
country)
• Already implemented by some operators in countries: India; Greece; Albania; Turkey;
Germany; Czech-Rep, Ireland etc..
• Link: http://www.efficiency-from-germany.info/EIE/Navigation/EN/Database/show,eDid=1172,type=unternehmen.html