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Publication Citation: Application of an Evolution Program for Refrigerant Circuitry Optimization

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Author(s): Piotr A. Domanski; David A. Yashar;
Title: Application of an Evolution Program for Refrigerant Circuitry Optimization
Published: December 07, 2007
Abstract: Increased concerns about climate change have emphasized the importance of air-conditioning and refrigeration systems with a high coefficient of performance (COP). The effectiveness of heat exchangers significantly influences the vapor-compression system s COP. Evolutionary algorithms provide an opportunity to optimize engineering designs of heat exchangers beyond what is typically feasible for humans. This paper presents a summary of our past and most recent work with finned-tube heat exchangers using an evolutionary program, Intelligent System for Heat Exchanger Design (ISHED), which optimizes refrigerant circuitry. The experiments with ISHED included evaporators and condensers working with refrigerants of vastly different thermophysical properties and heat exchangers exposed to non-uniform air distributions. In all cases, ISHED generated circuitry designs that were as good as or better than those prepared manually. Further simulations showed that the COP ranking of R600a, R290, R134a, R22, R410A, and R32 in systems with optimized heat exchangers differed from the ranking obtained using theoretical cycle analysis. In the system simulations, the high-pressure refrigerants overcame the thermodynamic disadvantage associated with their low critical temperature and had higher COPs than the low-pressure refrigerants.
Conference: ACRECONF 2007
Proceedings: "Challenges to Sustainability"
Pages: pp. 172 - 187
Location: New Delhi, IN
Dates: December 7-8, 2007
Keywords: Air conditioning, COP, finned-tube, heat exchanger, optimization, refrigerant circuitry.
Research Areas: High Performance Buildings
PDF version: PDF Document Click here to retrieve PDF version of paper (602KB)