Thermodynamic modelling of a double-effect LiBr-H2O absorption refrigeration cycle

Iranmanesh, Aghil; Mehrabian, M. A.

doi:10.1007/s00231-012-1045-3

Cited by 15 publications

(13 citation statements)

References 9 publications

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“…The modeling methods used in this paper are gathered from different references which have validated their methods. 34,35 Their works have been modeled by the authors of this paper and the same results have been obtained. Figure 3 shows the changes of the cycle COP with the changes in the first condenser heat duty.…”

Section: Resultsmentioning

confidence: 64%

“…Then the values of cycle COP have been calculated in those heat duties. The results presented by Iranmanesh and Mehrabian 34 and the results obtained with the same model in this work are compared in Figure 3. In this figure, the heat transfer fluid of the first condenser is pure water in 1 atm and its temperature has been chosen to vary from 15 to 25 ℃.…”

Section: Resultsmentioning

confidence: 92%

“…The specifications of the ARS are taken from the study by Iranmanesh and Mehrabian. 34 In this system, LiBr-H 2 O, which is the working fluid of the absorption refrigeration cycle, is first preheated by the outlet hot fluid from the trough collector in a double pipe heat exchanger. The preheated fluid (stream 13hot) causes the generator to require less energy to warm up the working fluid.…”

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

“…As it was mentioned before, the absorption refrigeration cycle considered in this paper is selected to be as the one presented by Iranmanesh and Mehrabian. 34 They have presented a modeling method to study the performance of the cycle. The algorithm of the modeling method is shown in Figure 2.…”

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

“…It must be noted that the numbers given in the algorithm are related to the numbers in the process diagram shown in Figure 1. The related equations are given in by Iranmanesh and Mehrabian 34 and, to avoid repetitions, they are not given in this paper. The main difference between their model and the one presented in this research is the use of a trough collector for preheating the generator inlet stream (13 hot).…”

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

See 4 more Smart Citations

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Aramesh

Pourfayaz

Haghir

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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In this article, the performance of a double-effect LiBr-H2O absorption refrigeration cycle is studied and is improved by applying solar energy and utilizing nanofluids. A trough collector is used to preheat the working fluid before entering the generator of the cycle. In addition, four different nanofluids are considered as the heat transfer fluid of the collector: Al2O3, Ag, Cu, and CuO. The effects of using nanofluids on the outlet temperature of the heat transfer fluid, the temperature of the working fluid entering the generator, the heat produced by the generator, and COP of the cycle are studied. Different concentrations of the nanoparticles from 0 to 2.5% are considered for the nanofluids. The results indicate that in all the concentrations, Ag nanoparticles will have a better performance comparing to the other types. Furthermore, it was concluded that the higher concentrations of the nanoparticles and along with it the higher inlet temperature of the generator will decrease the generator heat production rate up to 4%. Moreover, considering the constant cooling capacity of the cycle, usage of the Ag nanoparticles in the concentration of 2.5% increases the value of COP up to 3.9%, with respect to the pure water.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 92%

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

See 3 more Smart Citations

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Aramesh

Pourfayaz

Haghir

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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Sensitivity analysis of avoidable and unavoidable exergy destructions in a parallel double‐effect LiBr–water absorption cooling system

Zendehnam

Pourfayaz

2022

Energy Science & Engineering

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A parametric study has been carried out based on advanced exergy assessment for a parallel double‐effect LiBr–water absorption chiller. The advanced exergy method provides the real potential of the equipment for improvement in the system by recognizing the avoidable irreversibilities. The sensitivity analysis of various parts of the exergy destruction (endogenous avoidable, endogenous unavoidable, exogenous avoidable, and exogenous unavoidable) in system components and the overall performance (coefficient of performance, exergy efficiency, and modified exergy efficiency) of the system has been done to identify the actual potential of different components of the system to improve the overall performance of the system relative to operational parameters. Operational parameters include the heat source temperature, heat sink temperature, and the difference between the absorption and condensation temperature. The results showed that by modifying and improving the performance of components, 18.5% of the total exergy destruction of the system could be reduced. The modified exergy efficiency reduces sharply (nearly 40%) with the rising heat sink temperature. The endogenous exergy destruction increases in all system components except the condenser and evaporator by the heat source temperature increase. With the increase in the heat sink temperature, the avoidable part of the total exergy destruction in the system increases due to the significant rise in the avoidable exogenous exergy destruction in the components, and the unavoidable endogenous exergy destruction decreases (more than 200%) in the absorber. Increasing the condensation temperature reduces the unavoidable endogenous exergy destruction in the components except for the low‐temperature heat exchanger.

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Optimal temperature of collector for solar double effect LiBr/H2O absorption cooling system in subtropical city based on a year round meteorological data

Liu

2014

Applied Thermal Engineering

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Thermodynamic modelling of a double-effect LiBr-H2O absorption refrigeration cycle

Cited by 15 publications

References 9 publications

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Sensitivity analysis of avoidable and unavoidable exergy destructions in a parallel double‐effect LiBr–water absorption cooling system

Optimal temperature of collector for solar double effect LiBr/H2O absorption cooling system in subtropical city based on a year round meteorological data

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