Dynamic modeling and control of multi-evaporator air-conditioning systems

Rajat Shah, Andrew G Alleyne, Clark W. Bullard

Research output: Contribution to conferencePaper

Abstract

This paper presents a new methodology for the dynamic modeling of multi-evaporator air-conditioning cycles. The resulting model is suitable for designing advanced closed-loop controllers for these systems. A generalized modeling approach is developed, which is applicable to commercially available units with any number of evaporators. Model validation against data from an experimental dual-evaporator system for step inputs to compressor speed and expansion valve opening is also presented, and the results show good prediction accuracy. The open-loop behavior observed in these simulation studies clearly indicates the effect of cross-coupling between dynamic variables of different evaporators. Finally, closed-loop control strategies based on the model and the system characteristics are discussed, and comparison of two control strategies for control of pressure and superheat of the two evaporators is also presented.

Original languageEnglish (US)
Pages111-121
Number of pages11
StatePublished - Nov 22 2004
Event2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers - Anaheim, CA, United States
Duration: Jan 24 2004Jan 28 2004

Other

Other2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers
CountryUnited States
CityAnaheim, CA
Period1/24/041/28/04

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shah, R., Alleyne, A. G., & Bullard, C. W. (2004). Dynamic modeling and control of multi-evaporator air-conditioning systems. 111-121. Paper presented at 2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Anaheim, CA, United States.