A new approach that combines fuzzy set theory, a process simulation program and engineering knowledge for synthesizing cascade refrigeration system is presented. The synthesis algorithm is based on applying expert rules and consists of the three main steps: qualifying expert rules in a fuzzy rule-based procedure, the classical conjunction of fuzzy compatibility degrees and choosing the best refrigeration systems. This approach has been tested on a number of conventional problems reported in the literature. Results of the proposed method are consistent with the reported optimum solution and need much less computation compared to the same algorithms published.
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