Optimal match between heat source and absorption refrigeration

Wang, Yufei; Wang, Chensheng; Feng, Xiao

doi:10.1016/j.compchemeng.2016.11.003

Cited by 34 publications

(17 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, the condensation temperature is set as 45 • C and the concentration of solution is set as 0.58 for absorption section, referring to Wang's work [29]. A series of evaporation temperatures alternatives (5…”

Section: Simulation Of Compression-absorption Cascade Refrigeration Smentioning

confidence: 99%

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

et al. 2020

View full text Add to dashboard Cite

Compression–absorption cascade refrigeration system (CACRS) is the extension of absorption refrigeration system, which can be utilized to recover excess heat of heat exchanger networks (HENs) and compensate refrigeration demand. In this work, a stage-wise superstructure is presented to integrate the generation and evaporation processes of CACRS within HEN, where the generator is driven by hot process streams, and the evaporation processes provide cooling energy to HEN. Considering that the operating condition of CACRS has significant effect on the coefficient of performance (COP) of CACRS and so do the structure of HEN, CACRS and HEN are considered as a whole system in this study, where the operating condition and performance of CACRS and the structure of HEN are optimized simultaneously. The quantitative relationship between COP and operating variables of CACRS is determined by process simulation and data fitting. To accomplish the optimal design purpose, a mixed integer non-linear programming (MINLP) model is formulated according to the proposed superstructure, with the objective of minimizing total annual cost (TAC). At last, two case studies are presented to demonstrate that desired HEN can be achieved by applying the proposed method, and the results show that the integrated HEN-CACRS system is capable to utilize energy reasonably and reduce the total annualized cost by 38.6% and 37.9% respectively since it could recover waste heat from hot process stream to produce the cooling energy required by the system.

show abstract

Section: Simulation Of Compression-absorption Cascade Refrigeration Smentioning

confidence: 99%

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

et al. 2020

View full text Add to dashboard Cite

show abstract

“…De esta manera, el máximo flujo de calor que puede transferirse será igual al producto de la capacidad calorífica mínima y la mayor diferencia de temperatura. Finalmente, la efectividad del intercambiador de calor está dada por la Ecuación (9).…”

Section: Análisis Termodinámicounclassified

“…Durante la prueba, la capacidad más alta de refrigeración mostrada por el equipo fue 10,1 kW, y produjo hielo a pesar de la alta temperatura de condensación (45 • C) debido a las condiciones climáticas de verano. Otros autores como Wang et al [9] estudiaron las fuentes óptimas de calor para diferentes aplicaciones de SRA.…”

Section: Introductionunclassified

Análisis termodinámico de un chiller de absorción de 1 y 2 etapas de una planta de cogeneración

Zúñiga-Puebla

Vallejo-Coral

Vega-Galaz

2018

ings

View full text Add to dashboard Cite

Se han desarrollado modelos termodinámicos de enfriadores de agua por absorción de una etapa y ciclo no común de dos etapas que usan calor de desecho (de motores de combustión interna de 8,7 MW cada uno) para analizar las condiciones de operación de los equipos. Se ha realizado la comparación del sistema de una etapa con el sistema propuesto (2 etapas) en esta investigación. El coeficiente de desempeño (COP) obtenido para ambos sistemas fue el mismo, pero el calor removido del espacio refrigerado aumento de 1,3 MW (una etapa) a 1,6 MW (dos etapas) debido a que se recupera más energía residual utilizando un segundo generador. El calor residual aprovechado por el equipo de refrigeración fue de 3,8 MW y el factor de planta del proceso de cogeneración fue de 58,11 % y la capacidad de refrigeración del equipo fue de 1,623 kW. Finalmente, los ahorros económicos estimados por concepto de energía eléctrica que se tienen por poner en marcha el sistema de refrigeración por absorción que utiliza gases de escape como fuente de energía en lugar de un equipo común de refrigeración por compresión de la misma capacidad son 142 000,00 USD/año.

show abstract

“…A major benefit of the absorption cooling system is the opportunity to use different heat sources to drive the generator of absorption. Wang et al [21] investigated the optimal heat sources for different absorption cooling system applications. The heat released from the exhaust gases of boilers, internal combustion engines, and gas turbines could be utilized as a heat source for an absorption system.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Economic Comparisons of Environmentally Friendly Solar Assisted Absorption Air Conditioning Systems

2021

View full text Add to dashboard Cite

Absorption refrigeration cycle is considered a vital option for thermal cooling processes. Designing new systems is needed to meet the increasing communities’ demands of space cooling. This should be given more attention especially with the increasing conventional fossil fuel energy costs and CO2 emission. This work presents the thermo-economic analysis to compare between different solar absorption cooling system configurations. The proposed system combines a solar field, flashing tank and absorption chiller: two types of absorption cycle H2O-LiBr and NH3-H2O have been compared to each other by parabolic trough collectors and evacuated tube collectors under the same operating conditions. A case study of 200 TR total cooling load is also presented. Results reveal that parabolic trough collector combined with H2O-LiBr (PTC/H2O-LiBr) gives lower design aspects and minimum rates of hourly costs (5.2 $/h) followed by ETC/H2O-LiBr configuration (5.6 $/h). H2O-LiBr gives lower thermo-economic product cost (0.14 $/GJ) compared to the NH3-H2O (0.16 $/GJ). The absorption refrigeration cycle coefficient of performance ranged between 0.5 and 0.9.

show abstract

Optimal match between heat source and absorption refrigeration

Cited by 34 publications

References 16 publications

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

Heat Exchanger Network Synthesis Integrated with Compression–Absorption Cascade Refrigeration System

Análisis termodinámico de un chiller de absorción de 1 y 2 etapas de una planta de cogeneración

Thermo-Economic Comparisons of Environmentally Friendly Solar Assisted Absorption Air Conditioning Systems

Contact Info

Product

Resources

About