Construction of Mini Fan Coil Unit
Abstract
A microcontroller-based fancoil unit(FCU) fuzzy controller is designed and
implemented in this paper. The controller employs the concept of duty ratio on the
electric valve control, which could make full use of the cooling and dehumidifying
capacity of the FCU when the valve is off. The traditional control method and
itslimitations are analyzed. The hard ware and software design processes are
introduced indetail. The experimental results show that the proposed method is more
energy efficient compared to thetraditional controlling strategy. Furthermore, a more
comfortable room condition could be achieved by the proposed method. The Lorenz
curve and the Gina index are introduced in this study and used as indices to depict
load features. For a large -scale use in office building, shopping malls, and other
buildings, the fan coil unitis investigated in this study. The proposed low-cost FCU
fuzzy controller deserves to be widely used in engineering applications.
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