Multi-objective optimization of double effect series and parallel flow water–lithium chloride and water–lithium bromide absorption refrigeration systems

Konwar, Dimpul; Gogoi, T.K.; Das, Abiskrita

doi:10.1016/j.enconman.2018.10.029

Cited by 18 publications

(3 citation statements)

References 34 publications

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“…Para el cálculo de las propiedades del agua, los autores emplearon las correlaciones propuestas por Talbi y Angew [27]. Konwar et al [28] aplicaron una optimización multi-objetivo a un ciclo de refrigeración por absorción de doble efecto, con flujo en serie y paralelo, en el que las propiedades del agua y del vapor fueron calculadas de las ecuaciones presentadas por la IAPWS.…”

Section: Introductionunclassified

Análisis de correlaciones para propiedades termodinámicas del agua saturada y vapor sobrecalentado aplicado a ciclos de refrigeración por absorción

Rodríguez Muñoz,

Valencia Castillo,

Pacheco Cedeño

et al. 2023

Rev. Ci. Tec.

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El presente trabajo compara las propiedades termodinámicas, del agua saturada y sobrecalentada, obtenidas mediante correlaciones propuestas por dos grupos de autores contra aquellas correlaciones obtenidas por la IAPWS. Además, el COP de un ciclo de refrigeración por absorción es estimado, en el que es empleado como mezcla de trabajo, para distintas efectividades del intercambiador de calor de solución, mediante el uso de dichas correlaciones. Los resultados muestran que, al comparar las propiedades, estimadas por medio de las correlaciones propuestas, contra las obtenidas por la IAPWS, se concluye que hay una buena concordancia entre la mayoría de propiedades bajo estudio. Cuando se utilizan las correlaciones para estimar el COP del ciclo, las correlaciones propuestas por uno de los dos grupos de autores lo estiman muy bien, siendo la máxima desviación de cuando la efectividad del intercambiador de calor de solución es de ; mientras que, si se utilizan las correlaciones propuestas por el otro grupo de autores, la desviación es casi constante, promediando . Finalmente, una ventaja del uso de las correlaciones propuestas por ambos autores, en comparación con las obtenidas por la IAPWS, es que estas resultan de formulaciones de simples polinomios (n 6), lo que las hace más sencillas de programar, así como su posible implementación como herramienta computacional para el cálculo de las propiedades del agua durante el análisis y simulación de sistemas de refrigeración por absorción.

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Section: Introductionunclassified

Análisis de correlaciones para propiedades termodinámicas del agua saturada y vapor sobrecalentado aplicado a ciclos de refrigeración por absorción

Rodríguez Muñoz,

Valencia Castillo,

Pacheco Cedeño

et al. 2023

Rev. Ci. Tec.

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“…They defined the solution distribution ratio for parallel flow cycles, and these were optimized for maximum COP. Konwar et al [28] presented a comparison analysis of series and parallel flow VACS. They used two different working fluids, such as water-LiCl and water-LiBr, and optimized the system for maximum COP and minimum irreversibility of both types of VACS.…”

Section: Introductionmentioning

confidence: 99%

First Law Optimization and Review of Double and Triple-Effect Parallel Flow Vapor Absorption Refrigeration Systems

Azhar¹

2023

Processes

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Parallel flow double and triple-effect vapor absorption cooling systems (VACS) are trying to meet the challenges of vapor compression cooling systems due to their better performance. Therefore, the present study deals with the review, thermodynamic analysis, and optimization of operating parameters for both double and triple-effect VACS. Lithium bromide water was selected as the working fluid, while liquified petroleum gas (LPG) and compressed natural gas (CNG) were taken as the source of energy to drive both the VACS. Detailed First Law analysis, i.e., coefficient of performance (COP), was examined along with the optimization of operating parameters (such as salt concentration and operating generators temperature at different pressure levels) and the volume flow rate of the gases. Optimization was carried out for maximum COP of the VACS using an iterative technique. Our results show that the COP of the triple-effect system was approximately 32% higher than the double effect, while 15–20% less consumption of the gases (LPG and CNG) was observed. The most optimum stage for the operation of triple-effect VACS was reached at Te = 4 °C and Tc = Ta = 30 °C, Tg = 180 °C, Tc4 = 104 °C, Tc3 = 66 °C, Z1 = 0.5, and Z2 = 0.45.

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“…In recent years, double-effect ABR cycles are being considered in systems that use nanoparticles to enhance heat transfer within H 2 O/LiBr mixtures, 16 considering different flowsheet layouts (eg, parallel or series arrangements) with H 2 O/LiBr 17 or H 2 O/LiBr-based fluids. 18 Similarly, triple-effect ABR cycles are being evaluated in terms of exergetic and energetic performance using H 2 O/LiBr, 19 as part of solar-based infrastructures that also combine organic Rankine and Kalina cycles using NH 3 /H 2 O, 20 and as part of compression-absorption configurations that also employ ionic liquids and fuel cells. 21 Despite these very promising developments, it is clear that investigations considering double-and tripleeffect systems also need to account for organic fluids; however, they are considerably less frequent than single effect ones.…”

Section: Introductionmentioning

confidence: 99%

Techno‐economic assessment of novel and conventional working fluid mixtures for two‐stage double‐ and triple‐effect absorption refrigeration systems

et al. 2021

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This work presents a systematic techno-economic assessment of 84 conventional and novel working fluid mixtures in two-stage, double-and triple-effect (Kangaroo) absorption refrigeration cycles. Rectifiers are modeled as staged distillation columns to capture appropriately the separation tasks. All mixtures are first evaluated based on process operating performance indicators including the coefficient of performance, the exergy efficiency, the cycle high pressure, the refrigerant and absorbent total flowrates, the total number of stripping stages and the distillate-to-feed ratios, subject to constraints ensuring feasible operation. The distillate-to-feed ratio, the number of stages in each rectifier and the individual flows of the refrigerant and the absorbent in different cycle circuits are considered as design parameters. The evaluation considers wide operating ranges, to identify the conditions that result in optimum values for the employed indicators. A multi-criteria approach is used to generate few, highly performing candidates which are further evaluated using economic criteria. A mixture of acetaldehyde/dimethylformamide is selected as the best performing working fluid which exhibits at best 39% lower cost per ton of cooling and 7% higher coefficient of performance than NH 3 /H 2 O in the tripeeffect cycle, with similar high performance observed in the double-effect cycle too. The same mixture exhibits at best 38% lower coefficient of performance and 1% lower cost per ton of cooling than H 2 O/LiBr.

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Multi-objective optimization of double effect series and parallel flow water–lithium chloride and water–lithium bromide absorption refrigeration systems

Cited by 18 publications

References 34 publications

Análisis de correlaciones para propiedades termodinámicas del agua saturada y vapor sobrecalentado aplicado a ciclos de refrigeración por absorción

Análisis de correlaciones para propiedades termodinámicas del agua saturada y vapor sobrecalentado aplicado a ciclos de refrigeración por absorción

First Law Optimization and Review of Double and Triple-Effect Parallel Flow Vapor Absorption Refrigeration Systems

Techno‐economic assessment of novel and conventional working fluid mixtures for two‐stage double‐ and triple‐effect absorption refrigeration systems

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