Online control method for outdoor air rate variable setting value of VAV system based on static pressure difference control of outdoor air dampers

Focusing on the problem of mismatch between outdoor air supply and demand in multi-zone VAV system, proposes a new online control method which is based on static pressure difference control of outdoor air damper. In this method, the change of indoor air CO2 concentration and the total air demand of terminal are regarded as determination and constraints of outdoor air rate setting value. Verifies the feasibility of this new method by tests, and the results show that the proposed method can be well fitted with other control loops in the air conditioning system to ensure the demand of outdoor air rate and high energy efficiency, which is also suitable for online applications.