Potential Using of
Renewable Energy in
Telecommunication Stations
Maria de Fátima N.C. Rosolem - CPqD
Glauco Ribeiro dos Santos - CPqD
Luiz Antonio Soares - CPqD
Luiz Eduardo Ferreira Dias Junior - CPqD
Pamela Tobias Frare - CPqD
Raul Fernando Beck - CPqD
Vitor Torquato Arioli - CPqD
Increasing in Telecommunications
Demand
Indicators of Brasil Telecom (Acces-million)
•Mobile phone: 157,5
•Fixed: 41,7
•Broadband: 10,4
•Cable TV: 6,6
Climatic Changes
Renewable Energy
•Solar Photovoltaic (PV)
•Wind Energy
•Storage Systems - Fuel Cell
Solar Photovoltaic (PV)
Solar Photovoltaic (PV)
Projeto Data Center - Affordable Internet Services Online Inc.
Technology Pros and Cons
• Clean Energy
• High cost
• Silent
• Low efficiency
• “Free” and Infinite
• Efficiency Degradation
• Modular
• Storage systems
• Well suitable for stand
alone applications
• Low maintenance costs
• Long lifetime
• Simple operations
• Operating conditions (poor
light conditions)
• Temperature sensibility
• Low power density
Wind
Technology Pros and Cons
• Clean Energy
• Noise and visual pollution
• Easy to manufacture
• Competitive Price
• Suitable for
• Low capacity factor
• Large applications
• Operating conditions
• Stand alone systems
(seasons and wind speed
• Connected with the grid
dependence)
• Competitive Price
• Huge unexplored potential
• Heavy Infrastructure to
install
Fuel Cell
H 2  O 2  H 2O  Electricit y  Heat
Available Technologies
Fuel Cell Technology
Temperature range (ºC)
Fuel
Market Availability
AFC
50 - 200
H2 (pure)
O2 (pure)
Commercial (??)
PEMFC
60 - 80
H2 (99,95%)
O2 (from air)
Commercial (Stationary)
PAFC
100 - 200
H2
NG
Commercial
MCFC
600 - 750
NG
H2
Pre - commercial
SOFC
800 - 1000
NG
H2
Pre - commercial
DMFC
60 - 80
Methanol
Under development
Stationary application - Telecom
• Electrochemical device – DC
supplier;
• It is a suitable solutions in extreme
conditions;
• It helps in a low carbon footprint;
• It is a interesting solution more, not
is the BEST solution. It is better
when used combined with other
energy sources (batteries, PV and
wind)
Technologies Pros and Cons
• Run time
• Start up
• Environment temperature
• High cost
resistance range (- 25 º to
45 º C)
• Silent
• Clean Energy
• Life time
• Low Maintenance
• No recharge time
• Remote control
• Poor field database
• Hydrogen cost
• Refueling
• Standards and codes
Hybrid Systems
Hybrid System PV - Wind - Diesel - São Tomé - Brazil
Average Prices (U$/Kw)
• Fuel cell – U$ 3,000/Kw
• Solar Photovoltaic – U$ 400 – 1,000/Kw
• Wind Energy – U$ 0,11 – 0,22 /Kwh *
* Last prices in Brazil
Conclusions
• Today
the
people
are
more
consciences
about
the
environments
• In Brazil the using the renewable energy in telecommunications
companies is small
• This type the energy is expensive, it is necessary the incentive
programs
Maria de Fátima N. C. Rosolem
mfatima@cpqd.com.br
55 19 3705-7124