Multivariable control-oriented modeling of a direct expansion (DX) air conditioning (A/C) system |
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Authors: | Qi Qi Shiming Deng |
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Affiliation: | aDepartment of Building Services Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR |
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Abstract: | A dynamic mathematical model for a DX A/C system has been developed. The dynamic model, written in state-space representation which was suitable for designing multivariable control, was linearized at steady state operating points. The linearized model has been validated by comparing the model simulation results with the experimental data obtained from an experimental DX A/C system. The simulated results agreed well with the experimental data, suggesting that the model developed was able to capture the transient characteristics of the DX A/C system modeled. It is expected that the model developed can be useful in designing a multi-input multi-output (MIMO) controller to simultaneously control indoor air temperature and humidity in a space served by a DX A/C system. |
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Keywords: | Cooling system Air conditioning Direct expansion Modelling Simulation Comparison ExperimentMots clé s: Systè me frigorifique Conditionnement d’ air Dé tente directe Modé lisation Simulation Comparaison Expé rimentation |
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