Integrated Demand Controlled Ventilation for Single Duct VAV System with Conference Rooms

摘要

Single duct variable air volume (VAV) systems are widely used in office buildings to achieve energy savings. It supplies proper amount of conditioned air to satisfy both the load and the ventilation requirements of each individual zone. To obtain acceptable indoor air quality (IAQ), the overall outside air (OA) intake ratio has to consider the demands from all the zones with the method provided by ASHRAE 62. Some high-ventilation required rooms make it difficult to use a low OA intake ratio. This paper presents a new integrated demand controlled ventilation (IDCV) methodology which can ensure acceptable IAQ and energy savings with lower OA intake ratio. The requirement on hardware and software is simple and the implementation is easy. One office building model is applied to demonstrate the energy saving and show how the indoor air ventilation be satisfied under different circumstance. THE IDCV VAV methodology can be generalized to other similar buildings where the occupancy of critical zones is rare and clear.