<p>The vapor absorption refrigeration (VAR) is a sustainable alternative way of the conventional vapor compression refrigeration (VCR) cycle owing to their lower grid energy requirement and environmentally benign fluid pairing.&nbsp; Traditionally, the coefficient of performance (COP) of the conventional single effect VAR cycle is considerably lower than VCR cycles, which provide room for improvement in the form of double effect VAR cycles that provide relatively higher performance. The COP of the dual effect VAR cycle is enhanced due to the waste/rejected heat energy utilization of condenser or absorber into a secondary generator. The operating parameter-based COP models for the double effect VAR cycle are nonentity, and only Iyer correlation is available in the open literature. This work applied the Iyer's COP correlation on the double effect VAR cooling systems literature data operating with a variety of refrigerant and absorbent pairing.&nbsp; The comprehensive Mean Absolute Percentage Error (MAPE) analysis was performed for reported correlation for more than 1550 data points of various fluid pairings. Results revealed that MAPE (165-839%) values seem to be significantly higher for the reported correlation due to the specific fluid pairing systems. Furthermore, the model is optimized for the comprehensive set of study data, considerably reducing the MAPE up to 43.56%. The results also indicated that the reported correlation had lacked the fluid behavior attributes models, which hindered its application for developing new double effect VAR cycles. Therefore, it is crucial to establish a performance-based correlation that considers both operational parameters and fluid parameters to assess new efficient dual effect VAR cycles' performance.</p>

Modified Operating Parameter-Based Iyer Correlation for the Coefficient of Performance (COP) Prediction of Different Fluid Pairs in Double-Effect Vapor Absorption Refrigeration (VAR) Cycles

Paper Proceedings: https://asmedigitalcollection.asme.org/FEDSM/FEDSM2021/volume/85284

ASME 2021 Fluids Engineering Division Summer Meeting (FEDSM2021)

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