DEVELOPMENT OF A DEDICATED OUTDOOR AIR SYSTEM ( DOAS ) MODULE FOR A WHOLE BUILDING ANNUAL ENERGY SIMULATION PROGRAM
Young Tae Chae, Richard K. Strand
Dedicated outdoor air systems (DOAS) have been reported to improve indoor air quality and humidity level management, assist radiant cooling systems, and reduce HVAC energy consumption. Although models for HVAC outdoor air handling exists in whole building energy simulation programs, it was necessary to develop a new DOAS model for the whole building energy simulation program, EnergyPlus. The developed model controls the unit operation not by zone thermal load, but rather by schedules which users set in the input and various control modes. The unit is configured to handle three different control types of outdoor air. It also allows multiple outdoor air units in a single zone that can be tied to unique exhaust fans. In addition, the unit has the flexibility not only to use various coil components and heat recovery systems, but also to configure the components in any order desired. This paper will outline the capabilities of the model and demonstrate them through case studies.
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