Optimal performance of double-effect series flow vapour absorption refrigeration systems with new working fluids

Arun, M.; Maiya, M.P.; Murthy, S. Srinivasa

doi:10.1002/(sici)1099-114x(199809)22:11<1001::aid-er428>3.0.co;2-c

Cited by 15 publications

(8 citation statements)

References 4 publications

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“…Distribution stability test, Falling film absorption experiments and Data reduction were done to analyse the improvements of heat transfer rate and mass transfer rate, which was calculated to be 46.8% and 18% respectively, keeping the SiO 2 nanoparticle concentration 0.005 vol%. Arun et al [10] found an optimum value of the low pressure generator temperature at which all the vapour generated at the high pressure generator is completely condensed. R32-DMAC was found to be the best refrigerant at high evaporator temperature among all the environment friendly refrigerants.…”

Section: International Journal For Research In Applied Science and Engimentioning

confidence: 99%

Absorption Refrigeration Techniques with Phase Change Material and Dual Condenser Technology: An Extensive Review

Khajuria¹

2017

IJRASET

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Due to unavailability of source heat at times, temperature fluctuations in the Evaporator chamber occurs which is considered to be one of the drawbacks in this system. To avoid this issue, use of Phase Change Material (PCM) in the Evaporator unit has been suggested. PCM is a latent heat storage device which absorbs the additional heat being generated in the Evaporator chamber. Also during the system OFF condition due to some reason, PCM acts as a backup heat absorber as it absorbs all the heat being generated for some specific time period and prevents the rise in temperature. An approach to use the PCM in the absorption system has been made; advantages and disadvantages of using PCM in this system and exergy analysis of such systems have been discussed in this paper. Different approaches made to improve the thermal efficiency of an absorption system by integrating PCM in it have been presented. Combination of absorption system with compression system (hybrid cycles) to increase the overall efficiency of the system is also analysed. It has been observed that the cooling time of the system increases from 50 minutes to 115 minutes in case of pure ethylene glycol as compared with conventional absorption system without any PCM material under switched off condition. Furthermore, refrigerating effect is also improved by installing the mixture of water and ethylene glycol PCM material that results in the rise of cooling time parameter from 50 minutes to 110 minutes during system in switched off condition

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Section: International Journal For Research In Applied Science and Engimentioning

confidence: 99%

Absorption Refrigeration Techniques with Phase Change Material and Dual Condenser Technology: An Extensive Review

Khajuria¹

2017

IJRASET

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“…Some organic working fluids may be applied to replace ammonia-water mixture, in which HCFCs or HFCs are used as refrigerants and DMAC, DMETEG, DMEU, DMF, DMU or NMP are used as absorbents (Arun et al, 1998;Borde et al, 1997;Meng et al, 2013;Sujatha et al, 1997b;Xiao et al, 2011). To date, a few literatures about the bubble absorption process of organic working fluids are published.…”

Section: Organic Refrigerant Bubble Absorptionmentioning

confidence: 99%

Visual experimental research on the effect of nozzle orifice structure on R124–DMAC absorption process in a vertical bubble tube

Jiang

et al. 2016

International Journal of Refrigeration

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“…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. 12 Simulation-based works on double-effect cycles with organic fluids include those by Iyer et al 22 who develop correlations for process performance prediction, Jelinek and Borde 23 considering a 100 kW system, Songara et al 24 considering a 1 kW system, Arun et al 25 also considering a 1 kW system, Jelinek et al 26 considering double and triple pressure level cycles without mentioning their capacity, and Tharves Mohideen et al 27 investigating mass transfer phenomena in a 1 kW system. In all these cases, the rectification process is considered ideal, although in practice the internal structure (number of stages) and operation of the rectifiers is non-ideal and affects significantly the performance and economics of the cycles.…”

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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Optimal performance of double-effect series flow vapour absorption refrigeration systems with new working fluids

Cited by 15 publications

References 4 publications

Absorption Refrigeration Techniques with Phase Change Material and Dual Condenser Technology: An Extensive Review

Absorption Refrigeration Techniques with Phase Change Material and Dual Condenser Technology: An Extensive Review

Visual experimental research on the effect of nozzle orifice structure on R124–DMAC absorption process in a vertical bubble tube

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

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