Browse > Article
http://dx.doi.org/10.5391/JKIIS.2007.17.1.007

Design of Optimized Multi-Fuzzy Controllers for Air-Conditioning System with Multi-Evaporators  

Jung, Seung-Hyun (수원대학교 전기공학과)
Choi, Jeoung-Nae (수원대학교 전기공학과)
Oh, Sung-Kwun (수원대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Intelligent Systems / v.17, no.1, 2007 , pp. 7-12 More about this Journal
Abstract
In this paper, we introduce an approach to design multi-fuzzy controllers for the superheat and the low pressure that have an influence on energy efficiency and stabilization of aft conditioning system. Air conditioning system is composed of compressor, condenser several evaporators and several expansion valves. It is quite difficult to control the air conditioning system because the change of the refrigerant condition give an impact on the overall air conditioning system. In order to solve the drawback, we design multi-fuzzy controllers which control simultaneously both three expansion valve and one compressor for the superheat and the low pressure of air conditioning system. The proposed multi fuzzy controllers are given as two kinds of controller types such as a continuous simplified fuzzy inference type and a discrete fuzzy lookup_table type. Here the scaling factors of each fuzzy controller ate efficiently adjusted by veal coding type Genetic Algorithms. The values of performance index of the conventional type are compared with the simulation results of discrete lookup_table type and continuous simplified inference type.
Keywords
HVAC(heating, ventilating, and air conditioning); air conditioning system; real coding type Genetic Algorithms(GAs); fuzzy inference type; multi-fuzzy controllers;
Citations & Related Records
연도 인용수 순위
  • Reference
1 S.-K. Oh, 'Fuzzy Model & Control System by C-Programming', Naeha Publishing Co., 2002
2 Piao, Y., Zhang, H., and Zeungnam, B., 'A Simple Fuzzy Adaptive Control Method and Application in HVAC',proc. of the IEEE Int'l Conf. on Fuzzy Systems, Vol.. 1., pp. 528-532. 1998
3 Rajat Shah, 'Dynamic Modeling and Control of Single and Multi-Evaporator Subcritical Vapor Compression Systems' ACRC TR-216, Aug. 2003
4 De Jong, K. A. 'Are Genetic Algorithms Function Optimizers?', Parallel Problem Solving from Nature 2, Manner, R. and Manderick, B. eds., North-Holland, Amsterdam, 1992
5 K. - K. Jin, 'Genetic Algorithms and Their Applications', KyoWoo Press, 2002