Analysis of Lithium Bromide-Water (LiBr- H2O) Vapour Absorption Refrigeration System Using First Law of Thermodynamics

Raghuwanshi, Satish; Laad, Piyush

doi:10.2139/ssrn.3351049

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…The following hypotheses have been used for the thermodynamic modeling of ammonia-water absorption refrigeration system. 27,28 • The cycle operates at steady-state conditions. • At points 1, 4, and 10, there is only Saturated Liquid.…”

Section: Brief Plant Descriptionmentioning

confidence: 99%

Comparative study of Box–Behnken and central composite designs to investigate the effective parameters of ammonia–water absorption refrigerant system

Kazemian

Nassab

Javaran

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this paper, the statistical analyses of the ammonia-water absorption refrigerant system (ARS) are presented. For this purpose, different surface response methods, including the Central composite design (CCD) and Box- Behnken design (BBD), have been studied and compared first to obtain the best response. An attempt is made to study the effect of some factors (mass flow rate, isentropic efficiency of pump, pressure ratio, maximum pressure of cycle, concentration difference of strong and weak solution, concentration of strong solution and effectiveness factor of heat exchanger and pure ammonia concentration) on the system’s response. Based on the design of experiment analysis, regression models are presented to quantify the effects of these parameters on coefficient of performance (COP) and cooling load of the ammonia-water absorption refrigerant cycle. The proposed correlations obtained by the analysis have remarkably satisfactory performance for all simulation data. The error analysis is applied to find the maximum error of 0.482% in numerical computations for ARS by CCD method in midpoint values of parameters.

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Section: Brief Plant Descriptionmentioning

confidence: 99%

Comparative study of Box–Behnken and central composite designs to investigate the effective parameters of ammonia–water absorption refrigerant system

Kazemian

Nassab

Javaran

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…The enthalpy of water in the liquid state at all temperatures and pressure are calculated with the help of water property data. For all practical application, the enthalpy of water in the liquid state is calculated as: Where T ref is the reference temperature, 0 o C [15].…”

Section: A Enthalpy Values For the Refrigerant (Liquid And Superheated Vapor)mentioning

confidence: 99%

Solar assisted vapor absorption cooling system: A review

2020

J. adv. tec. eng. res.

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Absorption Refrigeration System can play a vital role in electrical energy conservation because they can be operated on waste heat energy. The intermittent nature of solar power may be a dominant think about exploring well-designed thermal energy storages for consistent operation of solar thermal-powered vapor absorption systems. Our goal is to design the cooling unit based on a vapor absorption system. For this purpose, we have done a literature survey, mathematical modeling, simulations, and made computer-aided design models of our unit. We veri􀅫ied our component operating conditions.Thermal energy storage acts as a buffer and moderator between solar thermal collectors and generators of absorption chillers and signi􀅫icantly improves the system performance. Vapor absorption chillers are available in half, single, double, and triple-effect modes of operation and operate at temperatures starting from 75 to 220 o C to supply a cooling effect with COPs starting from 0.3 to 1.8. Thus, the choice of appropriate solar collectors and thermal energy storages are two signi􀅫icant decisions affecting the consistency of output of a vapor absorption cooling system. This review covers all the major aspects of such systems. It also covers the research work done on this subject till now. Though there is still room for a lot of research work in this area of refrigeration systems. Moreover, the conclusions and recommendations are also discussed.

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“…Thus, using absorption refrigeration systems which use solar energy as a thermal source can be a solution with high potential for success to answer the needs of those developing areas, namely for ice production to preserve perishable products, fisheries, vaccines, etc. Thus, an intermittent absorption refrigeration system using solar energy as a low cost thermal source is a very interesting issue as no electric power is used (in our intermittent cycle) and a eco-friendly binary mixture can be used, such as the water-ammonia (H 2 O-NH 3 ) [5]. Using solar energy as thermal source to activate the refrigeration system cycle also has interesting advantages, such as, a free, clean and endless energy source which does not present risks for its users and is relatively easy to obtain [6].…”

Section: Motivationmentioning

confidence: 99%

Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production

Garcia

Rosa

2019

Sustainability

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This article is dedicated to the design, calculation and dimensioning of a small powered refrigeration system (132W) which produces ice bars (freezing) using solar thermal power, and resorts to an intermittent cycle absorption circuit with a water-ammonia mixture (H2O-NH3). The aim of this equipment is to minimize problems faced in places where there is no electric network to supply traditional refrigeration systems which preserve perishable products produced or stocked there, as well as drugs (vaccines), namely for specific regions of developing countries. The system developed can be divided into two parts. The intermittent cycle absorption refrigeration system uses a binary water-ammonia solution (H2O-NH3), where water is the absorber and the ammonia is the coolant and the thermal solar system. This is made up of CPC flat plate thermal collectors or vacuum tubes in which solar energy heats the water that circulates in the primary circuit. In the absorption circulation system, circulation occurs in a natural way due to the fluids affinity, and the temperature and pressure internal variations. This article shows the assumptions underlying the conception, calculation and dimensioning of the system’s construction.

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Analysis of Lithium Bromide-Water (LiBr- H2O) Vapour Absorption Refrigeration System Using First Law of Thermodynamics

Cited by 6 publications

References 14 publications

Comparative study of Box–Behnken and central composite designs to investigate the effective parameters of ammonia–water absorption refrigerant system

Comparative study of Box–Behnken and central composite designs to investigate the effective parameters of ammonia–water absorption refrigerant system

Solar assisted vapor absorption cooling system: A review

Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production

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