Thermodynamic Design of 10 TR Single-Effect LiBr-H2O Absorption Refrigeration System

Al-Osman, Soufyan Jamal; Mohammad, Saddam Atteyia

doi:10.33899/rengj.2023.142266.1274

	Thermodynamic Design of 10 TR Single-Effect LiBr-H2O Absorption Refrigeration System
Al-Rafidain Engineering Journal (AREJ)
Volume 29, Issue 1, March 2024, Pages 74-84 PDF (763.03 K)
Document Type: Research Paper
DOI: 10.33899/rengj.2023.142266.1274
Authors
Soufyan Jamal Al-Osman^* ; Saddam Atteyia Mohammad
Mechanical Engineering Department, College of Engineering, University of Mosul, Mosul, Iraq
Abstract
The use of energy, which is perceived as a key element in the development of civilization and is necessary for all aspects of modern life, is one of the measures of the country's growth. Due to the high costs of conventional energy sources as well as the possibility of their depletion, it has become necessary to look for new and direct sources of energy. As a result, thinking began to return to absorption cooling systems due to their ability to work using direct thermal energy. Apart from their simplicity and lack of moving parts, absorption cooling systems are commonly used because they can operate by a heat source with relatively low temperatures, such as those generated by burning natural gas or by solar collectors, to produce a refrigeration effect directly by evaporating the refrigerant. This article presented a thermodynamic design of (10 TR) single-effect (LiBr/ H2O) absorption refrigeration system. The capacity of the evaporator (35.17 KW) was used to determine the operating parameters for each component. Thermodynamic simulations are carried out on the basis of experimental correlations. To determine the various operational parameters of a vapor absorption refrigeration system under various operating conditions, a MATLAB code was developed. The effectiveness of the solution heat exchanger and the various temperatures of the generator, condenser, evaporator, absorber, are taken into consideration when calculating the coefficient of performance. The results obtained prove that the coefficient of performance increases by increasing the effectiveness of solution heat exchanger, generator and evaporator temperatures, and decreases by increasing absorber and condenser temperatures.
Keywords
LiBr-H2O; Absorption refrigeration systems; Air conditioning; Thermodynamic design

References
Allouhi A., Fouih Y.E., Kousksou T., Jamil A., Zeraouli Y., Mourad Y., ‘‘Energy consumption and efficiency in buildings: current status and future trends’’, (JCP), vol.109, pp.118-130, (2015), doi: https://doi.org/10.1016/j.jclepro.2015.05.139 Dahl R. ‘‘Cooling concepts: Alternatives to air conditioning for a warm world’’, Environmental Health Perspectives, vol.121, no.1, pp. A18–A25, (2013). Rashid S., Peters I., Wickel M., Magazowski C., ‘‘Electricity Problem in Iraq’’, Economics andPlanning of Technical Urban Infrastructure Systems, Universität Hamburg: Germany, (2012). Allouhi A., Kousksou T., Jamil A., Rhafiki T., Mourad Y., Zeraouli Y., ‘‘Economic and environmental assessment of solar air-conditioning systems in Morocco’’, Ren. and Sust. Energy Reviews, vol.50, pp.770–781, (2015), doi: https://doi.org/10.1016/j.rser.2015.05.044 Petela K., Szlek A., ‘‘Assessment of Passive Cooling in Residential Application under Moderate Climate Conditions’’, Ecological Chem. and Eng., vol.23, no. 2, pp. 211–225, (2016) . Kreider J.F., Kreith F., (1977) ‘‘Solar Heating and Cooling: Engineering, Practical Design, and Economics’’, Hemisphere Publishing Corp., Revised, 1st edition. ASHRAE Handbook: Fundamentals (I-P edition). Atlanta: ASHRAE Engineers, 2009. Bell I.A., Al-Daini A.J., Al-Ali Habib., Abdel-Gayed R.G., and Duckers, ‘‘The design of an evaporator, absorber and thermodynamic analysis of a vapour absorption chiller driven by solar energy’’, World Renewable Energy Congress, vol. 9, pp. 657-660, (1996). Lee S.F., Sherif S.A., ‘‘Thermodynamic analysis of a lithium bromide/water absorption system for cooling and heating applications’’, International Journal of energy Research, vol.25, pp.1019-1031, (2000) , doi: https://doi.org/10.1002/er.738 Arun M.B., Maiya M.P., and Murthy S.S., ‘‘Performance comparison of double effect parallel flow and series flow LiBr and H2O absorption systems’’, applied thermal engineering, vol. 21, p.p.1273-1279, (2001) , doi: https://doi.org/10.1002/(SICI)1099-114X(199809)22:11<1001::AID-ER428>3.0.CO;2-C Omer K., Muhsin K., ‘‘Theoretical study on the effect of operating conditions on performance of absorption refrigeration system’’, Energy Conversion and Management, vol. 48, pp. 599-607, (2007), doi: 10.1016/j.enconman.2006.06.005 Agyenim F., Knight I., Rhodes M., ‘‘Design and experimental testing of the performance of an outdoor LiBr -H2O solar thermal absorption cooling system with a cold store’’, Solar Energy, vol. 84, p.p. 735–744, (2010) , doi: https://doi.org/10.1016/j.solener.2010.01.013 Ochoa A.A.V., Dutra J.C.C., Henríquez J.R.G., dos Santos C.A.C., ‘‘Dynamic study of a single effect absorption chiller using the pair LiBr-H2O’’, Energy Conversion and Management, vol. 108, p.p. 30–42, (2016) , doi: https://doi.org/10.1016/j.enconman.2015.11.009 Cengel Y, Boles M., ‘‘Thermodynamics an Engineering Approach’’. 5th edition, (2005). Duffie J.A., Beckman W.A. (2013) “Solar Engineering of Thermal Process”, Wisconsin, John Wiley & Sons, doi: 10.1002/9781118671603 Karellas S., Tryfon C.R., Nikolaos T., and Braimakis K., ‘‘Solar Cooling Technologies’’, CRC Press, 1st edition, (2018), doi: https://doi.org/10.1201/9781315163178 Dossat R.J., ‘‘Principle of Refrigeration’’, PEARSON INDIA, 4th edition, (2010). Florides G.A., Kalogirou S.A., Tassou L.C., Wrobel L.C., “Design and construction of a LiBr-water absorption machine”, Energy Conversion and Management, vol.44, pp.2483-2508, (2003) , doi: https://doi.org/10.1016/S0196-8904(03)00006-2 Lansing F.L., “Computer Modeling of a single-stage Lithium Bromide/Water Absorption Refrigeration Unit”, DSN Engineering Section, JPL Deep Space Network Progress Report, pp.247-257. Kalogirou S., Florides G., Tassou S., and Wrobel L., “Design and Construction of a Lithium Bromide Water Absorption Refrigerator”, CLIMA 2000 /Napoli, World Congress, p.p. 15–18, (2001) , doi: https://doi.org/10.1016/S0196-8904(03)00006-2 Sharma A., Mishra B.K., Dinesh A., and Misra A., “Configuration of a 2 kW Capacity Absorption Refrigeration System driven by low grade energy source”, (IJMPERD), vol. 2, p.p. 1-9, (2012).
Statistics Article View: 451 PDF Download: 281