Super-Efficient Mechanical Ventilation

Abstract

A novel ventilation system has been installed in build ings constructed for the New Campus of the University of Nottingham. Super-efficient mechanical ventilation has been used as part of an integrated environmental strategy and operates with fan input powers below 0.5 WI^-1.S^-1 of airflow. The complete plant was assem bled from innovative low-pressure components and has exceptional performance. A key element of the design is that components of the system are bypassed when not in use. At the heart of the system is a low-velocity, high- efficiency thermal wheel. Evaporative cooling reduces summertime peak temperatures. A tracking wind-as sisted exhaust cowl further reduces the dependence on fan power. The low fan power requirement is matched by a 450-m2 photo-voltaic array effectively giving zero energy ventilation.

Keywords

Low energy Mechanical ventilation Evaporative cooling Heat recovery Wind assistance Photo-voltaic

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References

Joule II Contract No. JOU2-CT93-0235 (1991-1994). Engineering Research into Prototype Development for Low-Energy Buildings.

Joule II Contract No. JOU2-CT93-0351 (1991-1994). Office and Public Buildings Incorporating Wind/Solar Buoyancy/Photovoltaic Powered Ventilation Systems.