Performance of different working fluids in transfer-tank operated vapour absorption refrigeration systems

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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“…The coefficient of performance COP is a performance criterion used very widely in cooling systems. In ABR systems it is expressed as follows 40 :…”

Section: Working Fluid Assessment Criteria and Design Variablesmentioning

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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“…As the millennium approaches, innovative efforts are being encouraged to develop efficient and 'environmentally friendly' systems (Norodoslawsky et al, 1988;Karthikeyan et al, 1995;Hoelblingond Schnitzer, 1986). Air conditioning and refrigeration is usually carried out using vapour-compression systems.…”

Section: Introductionmentioning

confidence: 98%

Experimental analysis of the absorption and desorption rates of HCOOK/H2O and LiBr/H2O

Riffat

James

Wong

1998

Int. J. Energy Res.

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“…Meanwhile, polyethylene glycol dimethyl ethers, such as DMEDEG, DMETrEG, and DMETEG (tetraethylene glycol dimethyl ether), are good choices as absorbents for several refrigerants because of good thermal and chemical stability, and the working pairs have been applied in absorption engines . The pressure–density–temperature ( p ρ T ) of DMETrEG and the VLE of systems of DMETrEG with refrigerant (HFC-134a or HCFC-22) have been studied. − ,− …”

Section: Introductionmentioning

confidence: 99%

Isothermal Vapor–Liquid Equilibrium of HFC-161 + DMETrEG within the Temperature Range of 293.15–353.15 K and Comparison for HFC-161 Combined with Different Absorbents

et al. 2016

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Fluoroethane (HFC-161) is one of the most promising alternative refrigerants because of its excellent environmental and thermodynamic properties. It was considered as one of the most promising absorption working fluids in the absorption refrigeration. To make a better application of the refrigerant in absorption refrigeration systems, suitable absorbents should be selected for matching HFC-161. Vapor− liquid equilibrium (VLE) data is the key of the chemical engineering simulation and the refrigeration cycle calculation. On the basis of these, the vapor−liquid equilibrium data for the mixture of HFC-161 + dimethyl ether triethylene glycol were obtained at temperatures from 293.15 to 353.15 K by using a recirculation apparatus. The VLE data were then correlated by the Peng−Robinson (PR) equation of state combined with the modified Huron-Vidal first order (MHV1) mixing rule and nonrandom two liquid (NRTL) model. The experimental results had a good consistency with calculated values. Phase behaviors of HFC-161 combined with different absorbents were compared in this paper.

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Performance of different working fluids in transfer-tank operated vapour absorption refrigeration systems

Cited by 19 publications

References 3 publications

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

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

Experimental analysis of the absorption and desorption rates of HCOOK/H2O and LiBr/H2O

Isothermal Vapor–Liquid Equilibrium of HFC-161 + DMETrEG within the Temperature Range of 293.15–353.15 K and Comparison for HFC-161 Combined with Different Absorbents

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