Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

The purpose of this study is to compare the energy consumption characteristics and the indoor environment according to the control method of VAV system, and to provide basic data about the control method for energy saving and comfortable indoor environment. In this study, five types of VAV control methods are applied to general office building. The control methods included VAV terminal box minimum air flow control (Single/Dual Maximum Control Logic), Supply Air Temperature Reset control, DCV-CO₂ (Demand Controlled Ventilation), and Optimal Start control, and energy consumption and indoor environment of buildings were analyzed. The analysis program was EnergyPlus 8.8. Dual maximum control logic is the most advantageous in terms of energy consumption and thermal environment than other control strategies, but it has the most disadvantage in terms of indoor air quality. Dual Maximum Control Logic + DCV-CO₂, on the other hand, was advantageous in terms of indoor environment, but reduced energy consumption savings when compared with Dual Maximum Control Logic. Combining DCV-CO₂, SAT Reset control and Optimal Start control with Dual Maximum Control Logic reduce energy consumption by 29.3% when compared to CAV.