Comprehensive thermodynamic and operational optimization of a solar-assisted LiBr/water absorption refrigeration system

Sharifi, Shakiba; Heravi, Farshad Nozad; Shirmohammadi, Reza; Ghasempour, Roghayeh; Petrakopoulou, Fontina; Romeo, Luis M.

doi:10.1016/j.egyr.2020.08.013

Cited by 40 publications

(11 citation statements)

References 54 publications

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“…Comparison of COP as a function of generator temperature determined by the present study with those investigated by Salmi et al, 37 Azhar and Siddiqui, 39 and Sharif et al 54 …”

Section: Validationsupporting

confidence: 58%

“…As shown in Figure 4, results calculated in this study with conspiring the above design conditions are in good agreement with the reference literatures. The comparison of the present work with Sharifi et al 54 is also made at 25 kW cooling load. The LiBr‐H 2 O system is compared with the experimental work of González‐Gil et al 18 at four different temperature sets and the comparison is shown in Table 3.…”

Section: Validationmentioning

confidence: 62%

“… Simulations and analyses of the VACS are conducted under steady‐state conditions 10,54 The energy required to run the pump is eradicated from the system energy balance since a negligible amount of energy is consumed by it compared to other processes units 46,47 …”

Section: Modeling Of Mathematical Aspectsmentioning

confidence: 99%

“…The energy required to run the pump is eradicated from the system energy balance since a negligible amount of energy is consumed by it compared to other processes units 46,47 Except the generator, the heat interaction between all other components of the system (condenser, evaporator, absorber, and so on) and surroundings is neglected 39,54 The expansion processes in the solution valve as well as in the refrigeration valve are isenthalpic in nature 39,49 …”

Section: Modeling Of Mathematical Aspectsmentioning

confidence: 99%

“…To optimize the expenditure of a cryogenic natural gas plant, Ghorbani et al 53 applied multi‐objective GA (NSGA‐II) and revealed the possible means of improvement. Recently, Sharifi et al 54 optimized a single‐effect LiBr‐H 2 O system to maximize COP and exergetic efficiency of the system. The authors coupled the absorption system with a solar collector and a maximum increase of 9.1% and 3.0% in COP and exergetic efficiency respectively was observed.…”

Section: Introductionmentioning

confidence: 99%

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Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm

Bhowmick

Kundu

2020

Int J Energy Res

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Summary The major intention of this study is to reduce the total expenditure of a vapor absorption cooling system (VACS) by developing an optimization model with an alternative working pair LiCl‐H2O and compares it with the traditional LiBr‐H2O system. Considering the cooling capacity of 50 kW, two working pairs were to compare parametrically at various operating conditions. The model comprises of three parts, viz. a thermodynamic model for the estimation of coefficient of performance, exergetic efficiency, and availability destruction of system components; an economic model for computing expenditure flow rate and capital investing expenditure rate; and the minimization of the total expenditure using genetic algorithm. The parametric study suggests that a LiCl‐H2O system performs better from both thermodynamic and expenditure‐effective aspects under all working conditions involved in this study. Especially, a low generator temperature produces a noticeable difference. The present global optimization technique assesses the optimal operating temperatures of generator, absorber, condenser, and evaporator. An optimal operating condition provides a system with a 1.20% of decrement in total expenditure rate and 5.39% of reduction in total capital investing expenditure rate using LiCl‐H2O solutions with respect to LiBr‐H2O solutions. Finally, results derived from this study may assist to designers to choose an alternative working fluid for enhancing the performance of VACS.

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“…Comparison of COP as a function of generator temperature determined by the present study with those investigated by Salmi et al, 37 Azhar and Siddiqui, 39 and Sharif et al 54 …”

Section: Validationsupporting

confidence: 58%

Section: Validationmentioning

confidence: 62%

Section: Modeling Of Mathematical Aspectsmentioning

confidence: 99%

Section: Modeling Of Mathematical Aspectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm

Bhowmick

Kundu

2020

Int J Energy Res

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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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Process design and thermoeconomic evaluation of a CO2 liquefaction process driven by waste exhaust heat recovery for an industrial CO2 capture and utilization plant

Shirmohammadi

Aslani

Ghasempour

et al. 2021

J Therm Anal Calorim

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Comprehensive thermodynamic and operational optimization of a solar-assisted LiBr/water absorption refrigeration system

Cited by 40 publications

References 54 publications

Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm

Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm

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

Process design and thermoeconomic evaluation of a CO2 liquefaction process driven by waste exhaust heat recovery for an industrial CO2 capture and utilization plant

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Comprehensive thermodynamic and operational optimization of a solar-assisted LiBr/water absorption refrigeration system

Cited by 40 publications

References 54 publications

Thermo‐economic optimization and comparison study of LiBr‐H 2 O and LiCl‐H 2 O working pair in absorption cooling systems based on genetic algorithm

Thermo‐economic optimization and comparison study of LiBr‐H 2 O and LiCl‐H 2 O working pair in absorption cooling systems based on genetic algorithm

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

Process design and thermoeconomic evaluation of a CO2 liquefaction process driven by waste exhaust heat recovery for an industrial CO2 capture and utilization plant

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Product

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Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm

Thermo‐economic optimization and comparison study of LiBr‐H ₂ O and LiCl‐H ₂ O working pair in absorption cooling systems based on genetic algorithm