| 摘要 |
An air cooling system 400 for a building comprises an air handling unit 410 producing cooling air 460 at a predetermined temperature. The cooling air 460 is supplied to a space (570, fig 5) in the building. A first opening 430 in a mixing chamber allows entry of a first stream of air 480 returning / recirculated from the space, at a temperature above the predetermined temperature. A second opening 435 in the mixing chamber allows entry of a second stream of ambient air 490 from outside the building. The first stream and second stream are mixed in the mixing chamber and supplied to the air handling unit. A variable damper 432 is used to vary the rate of flow of air into the chamber through at least one or both of the openings. A fan may be located in a duct 440 for bringing in the outside air with its rate of turn / speed varied to determine the rate of flow of air into the chamber. Humidity may also be regulated by the rate of flow of air. The space may be a computer or server room. The cooling system of the invention reduces energy consumption. |
