Energy and Exergy Analysis of Water-LiBr Absorption Systems with Adiabatic Absorbers for Heating and Cooling

Gutiérrez-Urueta, G.; Huicochea, A.; Rodríguez-Aumente, P.A.; Rivera, W.

doi:10.1016/j.egypro.2014.10.279

Cited by 17 publications

(7 citation statements)

References 11 publications

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“…Overall, system irreversibility was found more during first and last working hours. G. Gutiérrez-Urueta et al [45] conducted a study on the energy and exergy analysis of water-LiBr absorption systems with adiabatic absorbers for heating and cooling. Their results show that the coefficient of performance and the exergy efficiency were influenced by the temperature, these parameters increase with the increase of the absorber temperature.…”

Section: The Necessity Of Exergy Analysis Of a Systemmentioning

confidence: 99%

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A Review on Exergy Analysis of Solar Refrigeration Technologies

Wouagfack¹,

Tenkeng²,

Lissouck³

et al. 2020

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Solar energy is becoming more and more useful in the modern day life in industrial, domestic and commercial sectors, because of his cleanliness from an environmental point of view and also contributes to the reduction of greenhouse effect gases such as CO 2 . Exergy analysis is a thermodynamic analysis technique based on the Second Law of Thermodynamics, which provides an alternative and illuminating means of assessing and comparing processes and systems rationally and meaningfully. Exergy analysis can assist in improving and optimizing designs. In this paper, the exergy analysis of solar thermal refrigeration cyles is reviewed. A review of the research state of art of the solar absorption and adsorption refrigeration technologies is also carried out. The cycles involved in these technologies are: open, closed, continuous and intermittent cycles. An overview of mesures of merit with regard to exergy (exergetic efficiency, exergy losses, exergy improvement and exergetic coefficient of performance) is presented. Besides, an historical and chronological view is done on the development scenario of exergy analysis in the world from 1824 until 2014. The main mathematical relations for the simulation of those cycles are presented.

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Section: The Necessity Of Exergy Analysis Of a Systemmentioning

confidence: 99%

“…Neglecting nuclear, magnetic and electric effects, the exergy for a specific state with reference to the environment can be written as: [45] .…”

Section: Exergymentioning

confidence: 99%

A Review on Exergy Analysis of Solar Refrigeration Technologies

Wouagfack¹,

Tenkeng²,

Lissouck³

et al. 2020

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“…h 10 = h 9 and h 12 = h 11 (2) • Refrigerant circuit between stations 1, 2, 3, & 4; applying the mass conservation equation:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…The flow of the solutions are driven by solution and circulation pumps. This type of system is known as the LiBr/water absorption refrigeration system equipped with an adiabatic absorber [2,3]. Many published mathematical models and experimental studies of the absorption refrigeration systems show that the COP (coefficient of performance) of the absorption system is greatly influenced by the system temperatures [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Model of a Lithium-Bromide/Water Absorption Refrigeration System Equipped with an Adiabatic Absorber

Osta-Omar

Micallef

2016

Computation

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Abstract:The objective of this paper is to develop a mathematical model for thermodynamic analysis of an absorption refrigeration system equipped with an adiabatic absorber using a lithium-bromide/water (LiBr/water) pair as the working fluid. The working temperature of the generator, adiabatic absorber, condenser, evaporator, the cooling capacity of the system, and the ratio of the solution mass flow rate at the circulation pump to that at the solution pump are used as input data. The model evaluates the thermodynamic properties of all state points, the heat transfer in each component, the various mass flow rates, and the coefficient of performance (COP) of the cycle. The results are used to investigate the effect of key parameters on the overall performance of the system. For instance, increasing the generator temperatures and decreasing the adiabatic absorber temperatures can increase the COP of the cycle. The results of this mathematical model can be used for designing and sizing new LiBr/water absorption refrigeration systems equipped with an adiabatic absorber or for optimizing existing aforementioned systems.

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“…Furthermore, they estimated the specific entropy field for temperatures ranging from 10 to 200 1C and concentrations ranging from 20% to 70%. Furthermore, some of the papers include economic analysis [10,11]. Many researches are recently interested in applications of solar-assisted absorption cooling/refrigeration systems and the improvement of their corresponding performance as it saves energy and is environmentally friendly.…”

mentioning

confidence: 99%

Performance Analysis of a Solar Driven Single Stage LiBr/H2O Absorption Refrigeration system

Shahboun¹,

Adeilla²

2018

Proceedings of First Conference for Engineering Sciences and Technology: Vol. 2

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The solar-assisted combined ejector was configured with the basic cycle of solar absorption refrigeration system to evaluate the performance of this cycle which using LiBr/H2O as a working fluid and operating under steady-state conditions. In this paper, the improvement of the system is achieved by utilizing the potential kinetic energy of the ejector to enhance refrigeration efficiency. However, the first and the second law of thermodynamics are used to analyze the performance of a single-stage water-lithium bromide absorption refrigeration system (ARS), whereas some working parameters are varied. Moreover, a mathematical model based on the exergy method is introduced to evaluate the system performance, exergy loss of each component and total exergy loss of all the system components. As well as, Parameters connected with performance of the cycle-circulation ratio (CR), coefficient of performance (COP), exergetic efficiency are calculated from the thermodynamic properties of the working fluids at various operating conditions. In addition, Minimum generator temperature that required to operate the system was evaluated. The results showed that, the evaporator, condenser loads and post-addition of the ejector are found to be permanently higher than that in the basic cycle. As well as, The COP of the modified cycle is improved by up to 60 % compared with that in the basic cycle at the given condition.

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Energy and Exergy Analysis of Water-LiBr Absorption Systems with Adiabatic Absorbers for Heating and Cooling

Cited by 17 publications

References 11 publications

A Review on Exergy Analysis of Solar Refrigeration Technologies

A Review on Exergy Analysis of Solar Refrigeration Technologies

Mathematical Model of a Lithium-Bromide/Water Absorption Refrigeration System Equipped with an Adiabatic Absorber

Performance Analysis of a Solar Driven Single Stage LiBr/H2O Absorption Refrigeration system

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