11/19/2022 0 Comments Matlab hvac simulation![]() ![]() Mannath, “Study and Simulation of the Predictive Proportional Integral Controller in comparison with Proportional Integral Derivative controllers for a two-zone heater system”, Master Thesis, Texas Tech University, 2002. Bansal, “Steady-State Model of Centrifugal Liquid Chillers”, International Journal of Refrigeration, vol. Mitchell, et al., “Models for Variable-Speed Centrifugal Chillers”, ASHRAE Trans. ![]() Guven, et al., (1994),” Conventional Chiller Performances Simulation and Field Data”, International Journal of Energy Research, vol.18, pp.391-399, 1994. Braun, et al., “Dynamic Model of a Centrifugal Chiller System – Model Development, Numerical Study, and Validation”, ASHRAE Trans., vol. The effectiveness of this new controller design, its implementation simplicity, convergence speed and robustness are proved in the last section of the paper. It is conceived within the context of non-minimum state space control system that “seems to be the natural description of a discrete-time transfer function, since its dimension is dictated by the complete structure of the model”. The novelty of this research is a new controller design approach, more precisely an improved version of proportional – integral control, the so called Proportional-Integral-Plus control for systems with time delay, based on linear ARMAX models. The aim to build linear ARMAX models for centrifugal chiller is to simplify considerable the control design strategies that are investigated in this research paper. ![]() For simulation purpose the centrifugal chiller model is simplified by using different approaches, especially the development of linear polynomials ARMAX and ARX models. The centrifugal chiller dynamics model in a discrete-time state-space representation is of high complexity in terms of dimension and encountered nonlinearities. The overall system is an interconnection of two main control loops, namely the chilled water temperature inside the evaporator, and the refrigerant liquid level control in condenser. The system consists of an evaporator, a condenser, a centrifugal compressor and an expansion valve. Centrifugal chillers are widely used in large building HVAC systems. The objective of this paper is to investigate three different approaches of modeling, design and discrete-time implementation of PI closed-loop control strategies in SIMULINK simulation environment, applied to a centrifugal chiller system. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |