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http://dx.doi.org/10.5762/KAIS.2015.16.6.4260

Optimal Control Strategies for Energy Saving of Central Cooling System with Outdoor Air Temperature Changes  

Park, Ki-Tae (Department of Building Equipment & System Engineering, Graduate School of Gachon University)
Ahn, Byung-Cheon (Department of Mechanical Engineering, Gachon University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.16, no.6, 2015 , pp. 4260-4266 More about this Journal
Abstract
In this study, the optimal control method for minimizing of energy consumption for central cooling system with proper occupant comfort level is researched by simulation. The optimal control method is that the optimal set temperatures such as the condenser water temperature, supply air temperature, and chilled water temperature with environment variable change such as outdoor air dry-bulb and wet-bulb temperatures are obtained by suggested optimal control algorithm with maximum and part building load. The TRNSYS program is used for system modeling and the control performances with the suggested optimal control method are compared with the existing control method of fixed set points. The suggested optimal control method shows better responses in energy consumption in comparison with existing control ones.
Keywords
Central Cooling System; Control variables; Environment variables; Optimal Control; Optimal Set Temperatures;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 J.W.Hwang and B.C.Ahn, "Experimental Study on Optimal Operation Strategies for Energy Saving in Building Central Cooling system", Journal of the Korea Academia-Industrial cooperation Society, Vo1.14, No.9, pp4610-4615, 2013. DOI: http://dx.doi.org/10.5762/KAIS.2013.14.9.4610
2 S.D.Kim and J.Lee, "Recommended Practice for a Reasonable Design Demand Factor and Analysis of Power Consumption Characteristics by Loads in Office Building", Journal of the Korean Institute and Electrical Installation Engineers, Vol. 19, No.3, pp. 111-118, 2005. DOI: http://dx.doi.org/10.5207/JIEIE.2005.19.3.111   DOI
3 B.C.Ahn and J.W.Mitchell, "Optimal control development for chilled water plants using a quadratic representation", Energy and Buildings 33 No. 4, pp.371-378, 2001. DOI: http://dx.doi.org/10.1016/S0378-7788(00)00119-5   DOI
4 J.E.Braun, S.A.Klein, W.A.Beckman, J.W.Mitchell "Methodologies for optimal control of chilled water systems without storage, ASHRAE Transactions 95 (1), pp. 652-662, 1989.
5 Minitab Inc., MINITAB User's Guide Release 16, 2013.