关键区温度重设定的自适应按需新风控制

针对多区域变风量空调系统,提出一种关键区温度重设定的自适应按需新风控制策略,以最少的能耗满足各区的室内空气质量要求。该策略实时检测各区人员负荷,识别关键区,充分考虑关键区的新风需求,在进行新风设定时充分考虑循环空气中没有使用完的新风。关键区的温度重设定可以加大输送到关键区的送风量从而加大关键区的新风量,新风比减小,从而达到节能目的。利用多区域变风量空调系统的动态仿真平台对该控制策略进行了测试,对其动态控制性能、能耗特性及空气质量特性进行了评估,同时将该控制策略与其他按需新风控制策略进行了比较。

Adaptive demand-controlled Ventilation with temperature resetting in critical zones

For multi-zone variable air volume(VAV)air conditioning systems,presents an adaptive demand-controlled ventilation(DCV)strategy with temperature resetting in critical zones to meet the indoor air quality demand of each zone with minimum energy consumption.This strategy in a real-time way detects personnel load of each zone,identifies the critical zones online,and fully considers the outdoor air demand of the critical zones and the unvitiated outdoor air in the re-circulated air from other zones.The air temperature resetting in critical zones results in the increase of the supply air fraction and therefore the amount of outdoor air delivered to the critical zones.Consequently the total outdoor air demand and the overall energy consumption are reduced while the ventilation of critical zones is satisfied.This strategy and the control algorithm are validated in a "living" environment of dynamic simulation platform of multi-zone VAV air conditioning systems in term of dynamic control performance,energy performance and environmental performance by comparing with alternative demand-controlled ventilation strategies.