Tunnel ventilation for the heathrow express link

摘要

The development of a railway to serve Heathrow Airport was a major step for BAA to take. Further as it is intended to be an extension of the overall an travel experience it was never going to be an ordinary railway. But in order for it to herealised safely and cost effectively considerable thought has gone onto its design and implementation. No less so than with the ventilation system which combines multiple duties into one fan. At a level below this, the fans that are the motive force inthe system and the development of the final application has been an interesting process of optimisation and attention to detail.