Survivability of reliable telecommunications equipment enclosures through natural disasters

The application of passive conditioning technology for the control of internal temperature and relative humidity of shelters or containers housing sensitive telecommunication equipment makes it possible to maintain internal temperatures and humidity control within pre-defined limits without the use of air conditioners or motor generators and without the use of any kind of power supply, resulting in maximum reliability. The technology is utilized, among other applications, on shelters which can be manufactured to anti-seismic standards, and installed in any location either above or below ground. The below-ground version is especially resistant to natural disasters affording maximum protection of telecommunication equipment without any kind of pollution, and is virtually maintenance free. A power dissipation handling capacity of up to 30 kW can be made with the passive conditioning system (PCS). Working principles and typical field behavior of PCS are described. PCS design philosophy, construction of a below-ground vault, and life-cycle cost estimation are outlined.<>