scholarly journals Exergetic Analysis of a LiBr-H2O Single Effect Absorption Refrigeration System

2018 ◽  
Vol 11 (No. 07) ◽  
pp. 363-368
Author(s):  
Guillermo Valencia Ochoa ◽  
Jorge Duarte Forero ◽  
Luis Obregon Quinones
Keyword(s):  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Single Effect ◽  
Exergetic Analysis ◽  
Absorption Refrigeration System

Thermodynamic performance analysis of a single-effect absorption refrigeration system operating with water and 1-ethyl-3-methylimidazolium-based ionic liquids mixtures

2021 ◽  
pp. 117761
Author(s):  
Hugo Valença de Araújo ◽  
Luiz Henrique Parolin Massuchetto ◽  
Raiza Barcelos Corrêa do Nascimento ◽  
Stella Maia Rocha de Carvalho ◽  
José Vicente Hallak Dangelo
Keyword(s):  
Ionic Liquids ◽  
Performance Analysis ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Thermodynamic Performance ◽  
Single Effect ◽  
Absorption Refrigeration System ◽  
System Operating

EXERGETIC ANALYSIS AND ASSESSMENT OF HYBRID REFRIGERATION SYSTEM FOR DAIRY APPLICATIONS

2014 ◽  
Vol 22 (04) ◽  
pp. 1450021 ◽  
Author(s):  
S. ANAND ◽  
A. GUPTA ◽  
S. K. TYAGI
Keyword(s):  
Numerical Study ◽  
Exergy Loss ◽  
Cattle Dung ◽  
Vapor Compression ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Exergetic Analysis ◽  
Absorption Refrigeration System ◽  
The Cost ◽  
Work Done

The application of biogas powered refrigeration system is being studied because of many folds increase in the cost of conventional fuels. This paper presents a numerical study of biogas operated ammonia–water hybrid vapor compression absorption refrigeration system for onsite dairy cooling applications. This system involves the compressor between the generator and condenser and use biogas (generated from the cattle dung) fired boiler to heat water which acts as an energy source for generator in the hybrid system. The variation of performance parameters such as heat load of different components, exergy loss, COPcooling, COPheating and exergy efficiency are studied with varying generator temperature. The results indicate that COPcooling as well COPheating values are in the range of 0.1125–0.2159 and 1.112–1.169, respectively, for the same variation in the generator temperature from 65°C to 130°C. The work done by the compressor is also calculated and found to be decreasing with an increase in the condenser, evaporator and generator temperature. The effect of the ambient temperature on the exergy loss in different components is also studied in the analysis and the results revealed that the maximum exergy loss is found in the generator and it is found to be the lowest in compressor.

scholarly journals A New Computational Tool for the Development of Advanced Exergy Analysis and LCA on Single Effect LiBr–H2O Solar Absorption Refrigeration System

Lubricants ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 76
Author(s):  
José Cabrera César ◽  
Jean Caratt Ortiz ◽  
Guillermo Valencia Ochoa ◽  
Rafael Ramírez Restrepo ◽  
José R. Nuñez Alvarez
Keyword(s):  
Cooling System ◽  
Solar Irradiation ◽  
Solar Array ◽  
Maximum Relative Error ◽  
Exergy Destruction ◽  
Absorption Refrigeration ◽  
Refrigeration System ◽  
Single Effect ◽  
Absorption Refrigeration System ◽  
Hourly Basis

A single effect LiBr–H2O absorption refrigeration system coupled with a solar collector and a storage tank was studied to develop an assessment tool using the built-in App Designer in MATLAB®. The model is developed using balances of mass, energy, and species conservation in the components of the absorption cooling system, taking into account the effect of external streams through temperature and pressure drop. The whole system, coupled with the solar energy harvesting arrangement, is modeled for 24 h of operation with changes on an hourly basis based on ambient temperature, cooling system load demand, and hourly solar irradiation, which is measured and recorded by national weather institutes sources. Test through simulations and validation procedures are carried out with acknowledged scientific articles. These show 2.65% of maximum relative error on the energy analysis with respect to cited authors. The environmental conditions used in the study were evaluated in Barranquilla, Colombia, with datasets of the Institute of Hydrology, Meteorology and Environmental Studies (IDEAM), considering multiannual average hourly basis solar irradiation. This allowed the authors to obtain the behavior of the surface temperature of the water in the tank, COP, and exergy efficiency of the system. The simulations also stated the generator as the biggest source of irreversibility with around 45.53% of total exergy destruction in the inner cycle without considering the solar array, in which case the solar array would present the most exergy destruction.

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