Abstract
In this study, a coupled analysis of computational fluid dynamics (CFD) and heating, ventilation, and air-conditioning (HVAC) system simulations was applied to a multi-split air-conditioning system in the operation phase during a power-saving period in summer. Two different forced operation schemes for the indoor units, i.e., a regular rotation control and a lowest reference temperature control for switching cooling and fan modes, were designed, and the effects of the two operation schemes on the indoor thermal environment were investigated. When the reference temperature points for the indoor units were located at a height of the occupied zone, the lowest reference temperature control was better than the regular rotation control from the viewpoint of creating a more uniform thermal environment in the occupied zone.
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