Optimized cooling for telecom mobile network access node

2G-3G Network deployed in shelter for Telecommunication need to operate under a controlled temperature environment. Efficiency, total cost of ownership, replacement of old technology units are the challenge that operators are facing. This paper describes a down flow air delivery, modular cooling system impact on climate inside telecom access nodes by employing new technologies which reduce the numbers of components thus increasing reliability and mtbf of the entire system. By using the correct air distribution and associating a modulating cooling system with an innovative free cooling device, it is possible to optimize the site air distribution reducing to a minimum the active cooling use. Implementing this cooling concept, when substituting old air conditioning units, when increased cooling capacity is needed in existing sites due to co-location of 2 and 3G technologies or when implementing new sites, it is possible to minimize the energy consumption and at the same time to improve the system reliability.