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Cooling towers are important equipments for the HVAC systems in commercial buildings, rejecting the process heat generation to the atmosphere. Dynamic modeling of cooling towers is beneficial for control design and fault detection and diagnostics of the chilled-water systems. This paper proposes a simple and yet effective dynamic model for a typical(More)
— To maintain the maximum achievable efficiency for the photovoltaic (PV) systems, it is crucial to achieve the maximum power point tracking (MPPT) operation for realistic illumination conditions. This paper presents the application of the adaptive extremum seeking control (AESC) scheme to the PV MPPT problem. A state-space model is derived for the PV(More)
Numerous studies in the literature cite the successful application of fault detection and diagnostic methods to simulation and laboratory data from central air-handling units; however, unstable control, a lack of standard control sequences, and data handling challenges have limited their application in the field. This paper describes a new method for(More)
The air-side economizers have been developed as a major class of energy-saving equipment to enhance the energy efficiency of central airconditioning systems by taking advantage of outdoor air during cool or cold weather. In current practice, the outdoor air damper is controlled to maintain either the maximum or minimum opening by comparing the outdoor air(More)