An algorithm of regulating an energy-efficient hot water system with the object model in the controller

Authors

DOI:

https://doi.org/10.15587/1729-4061.2016.73385

Keywords:

hot water system (HWS), control algorithm, internal model control (IMC), energy efficiency

Abstract

The article presents a method of controling an energy efficient hot water supply system, a large amount of heat energy in which is supplied by the solar collector. The study proves importance of energy saving technologies and their use in everyday life and industry.

The study presents a generalized structure of the system of hot water supply as a control object. The devised analytical model of dynamics of the system individual elements is based on the equations of heat balance. The model is reduced to a form suitable for use in computer modeling of the dynamics of technological processes. Numeric values of the parameters of the model transfer functions are calculated for the selected model of the solar collector. The resulting model of the control object for a single­circuit system serves as a basis for the comparative studies of various controller structures and control methods that provide the minimum readjustment and the fastest transition process. The comparison is based on classical PID­algorithms and the IMC­approach. The article describes synthesis of the IMC of the temperature of hot water in the point of its supply to users.

It is found that the proposed approach to designing a control algorithm based on the object model allows the IMC provide better performance quality as compared to traditional algorithms. It is shown that the controller synthesis requires taking into account the work of the actuator, and the controller filter order directly affects the valve drive motion making it smooth.

We have considered the prospects of the proposed approach and possible options for upgrading the system.

Author Biographies

Oleksandr Stepanets, National Technical University of Ukraine «Kyiv Polytechnic Institute», Peremohy ave., 37, Kyiv, Ukraine, 03056

PhD, Associate Professor

Department of Heat-and-Power Engineering Department

 

Anastasiia Andrasovych, National Technical University of Ukraine «Kyiv Polytechnic Institute», Peremohy ave., 37, Kyiv, Ukraine, 03056

Department of Heat-and-Power Engineering Department

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Published

2016-08-24

How to Cite

Stepanets, O., & Andrasovych, A. (2016). An algorithm of regulating an energy-efficient hot water system with the object model in the controller. Eastern-European Journal of Enterprise Technologies, 4(8(82), 11–18. https://doi.org/10.15587/1729-4061.2016.73385

Issue

Vol. 4 No. 8(82) (2016): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2016 Oleksandr Stepanets, Anastasiia Andrasovych

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