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- W2034608225 abstract "The objective of this study is to propose and evaluate advanced absorption cycles for the coefficient of performance (COP) improvement and temperature lift enhancement applications. The characteristics of each cycle are assessed from the viewpoints of the ideal cycle COP and its applications. The advanced cycles for the COP improvement are categorized according to their heat recovery method: condensation heat recovery, absorption heat recovery, and condensation/absorption heat recovery. In H2O–LiBr systems, the number of effects and the number of stages can be improved by adding a third or a fourth component to the solution pairs. The performance of NH3–H2O systems can be improved by internal heat recovery due to their thermal characteristics such as temperature gliding. NH3–H2O cycles can be combined with adsorption cycles and power generation cycles for waste heat utilization, performance improvement, panel heating and low temperature applications. The H2O–LiBr cycle is better from the high COP viewpoints for the evaporation temperature over 0°C while the NH3–H2O cycle is better from the viewpoint of low temperature applications. This study suggests that the cycle performance would be significantly improved by combining the advanced H2O–LiBr and NH3–H2O cycles. L'objectif de cette étude était de proposer et d'évaluer les cycles à absorption de pointe, avec l'accent sur l'amélioration du COP et l'accroissement des écarts de température. On a évalué les caractéristiques du COP idéal et ses applications. On a classé les cycles de pointe avec COP amélioré selon les méthodes de récupération de chaleur : récupération de chaleur de condensation, récupération de chaleur lors du processus d'absorption, et récupération de chaleur de condensation et d'absorption. Dans les systèmes utilisant le couple H2O/LiBr, le nombre d'effets et d'étages peut être amélioré par l'ajout d'un troisième ou quatrième composant au couple générateur-absorbeur utilisé. La performance des systèmes utilisant le couple NH3/H2O peut être amélioré par la récupération de chaleur interne, grâce aux caractéristiques thermiques des glissements de température. Les cycles utilisant le couple NH3/H2O peuvent être employés avec des cycles à adsorption et des cycles de génération d'énergie afin d'utiliser la chaleur perdue, d'améliorer la performance, et de chauffer dans des applications à basse température. Le cycle utilisant le couple H2O/LiBr produit un COP plus élevé pour des températures d'évaporation au dessus de 0°C, alors que le cycle utilisant le couple NH3/H2O convient mieux pour des applications à basse température. Cette étude montre que la performance du cycle peut être améliorée de façon significative grâce à l'utilisation des cycles de pointe utilisant le couple H2O/LiBr ou le couple NH3/H2O." @default.
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- W2034608225 date "2000-08-01" @default.
- W2034608225 modified "2023-10-16" @default.
- W2034608225 title "Review of advanced absorption cycles: performance improvement and temperature lift enhancement" @default.
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- W2034608225 doi "https://doi.org/10.1016/s0140-7007(99)00064-x" @default.
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