THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Authors of this Paper

External Links

online first only

Thermodynamic analysis of absorption cooling system with LiBr-Al2O3/water nanofluid using solar energy

ABSTRACT
Together with the developing nano technology, nano-fluids and nano-particles are used as working fluid in energy applications. It is foreseen that nanoparticles have high heat conduction coefficient and it will increase system performance by using as a working fluid in energy systems. Many studies in the literature show that nano fluids increase the heat transfer rate by improving heat transfer. In this study, a performance analysis of an absorption cooling system using solar energy was performed as numerically. LiBr-Al2O3/water nano-fluid has been used in the cooling system as working fluid. The thermodynamic values and calculations used in the analyses were performed with Engineering Equation Solver program. Heat load necessary for the generator is provided with a flat plate solar collector. For different operation condition, the variation of COP values was determined depend on Al2O3/water nanoparticle concentration ratio. When the Al2O3/water nanoparticle concentrations are changed as 0%, 0.5% and 0.1%, it was determined that the COP values increased. Nanoparticles added to the refrigerant at certain concentration values affects the COP values positively of cooling systems. Maximum COP value is 0.86 for 85ºC generator temperature and 0.1% Al2O3/water nanoparticle concentration. The lowest COP value was obtained for the 75 oC generator temperature. When the Al2O3/water nanoparticle concentration was increased together with the generator temperature, COP values also increased. When the nanoparticle concentration of the working fluid increases, the viscosity of the nanofluid can be increases. Due to, increased viscosity increases the pressure drop in the flow channel and the pump power required for the flow. Thus, 'minimum viscosity with maximum thermal conductivity' optimisation in applications is very important.
KEYWORDS
PAPER SUBMITTED: 2020-08-17
PAPER REVISED: 2020-10-24
PAPER ACCEPTED: 2020-10-27
PUBLISHED ONLINE: 2020-12-05
DOI REFERENCE: https://doi.org/10.2298/TSCI200817340K
REFERENCES
  1. Murshed, S. M. S., et al., Investigations of thermal conductivity and viscosity of nanofluids, International Journal of Thermal Sciences, 47 (2008), pp. 560-568
  2. Choi, S. U. S., et al., Enhancing thermal conductivity of fluids with nanoparticles, ASME International Mechanical Engineering Congress & Exposition (1995), San Francisco, CA.
  3. Elberry, M. F., et al., Performance improvement of power plants using absorption cooling System, Alexandria Engineering Journal, 57 (2018), pp. 2679-2686
  4. Sun, Y., et al., Performance analysis of R1234yf/ionic liquid working fluids for single-effect and compression-assisted absorption refrigeration systems, International Journal of Refrigeration, 109 (2020), pp. 25-36.
  5. Wu, S., et al., Experimental investigation of the effect of magnetic field on vapour absorption with LiBr-H2O nanofluid, Energy, 193 (2020), 116640
  6. Dai, E., et al., Theoretical and experimental investigation on a GAX-Based NH3-H2O absorption heat pump driven by parabolic trough solar collector, Solar Energy, 197 (2020), pp. 498-510
  7. Arafia, M., et al., A simulation study of n-butane absorption refrigeration system using commercial hydrocarbons as absorbents, International Journal of Refrigeration, 112 (2020), pp. 110-124.
  8. Liu, Z., et al., Thermodynamic and parametric analysis of a coupled LiBr/H2O Absorption chiller/Kalina cycle for cascade utilization of low-grade waste heat, Energy Conversion and Management, 205 (2020), 112370.
  9. De, R. K., et al., Performance comparison of solar-driven single and double-effect LiBr-water vapor absorption system based cold storage, Thermal Science and Engineering Progress,17 (2020), 100488.
  10. Xu, H., et al., Analytical Considerations of Flow-Thermal Coupling of Nanofluids in Foam Metals with Local Thermal Non-Equilibrium (LTNE) Phenomena and Inhomogeneous Nanoparticle Distribution, International Journal of Heat and Fluid Flow, 77 (2019), pp. 242-255.
  11. Xu, H. J., et al., Review on Heat Conduction, Heat Convection, Thermal Radiation and Phase Change Heat Transfer of Nanofluids in Porous Media: Fundamentals and Applications, Chemical Engineering Science, 195 (2019), pp. 462-483.
  12. Xu, H. J., et al., Lattice Boltzmann Modeling on Forced Convective Heat Transfer of Nanofluids in Highly Conductive Foam Metals with Local Thermal Non-Equilibrium (LTNE) Effect, Journal of Porous Media, 22(12) (2019), pp. 1553-1571.
  13. Xu, H., et al., The lattice Boltzmann modeling on the nanofluid natural convective transport in a cavity filled with a porous foam, International Communications in Heat and Mass Transfer, 89 (2017), pp. 73-82.
  14. Xu, H., et al., Flow and heat transfer characteristics of nanofluid flowing through metal foams, International Journal of Heat and Mass Transfer, 83 (2015), pp. 399-407.
  15. Ghaneifar, M., et al., Mixed convection heat transfer of AL2O3 nanofluid in a horizontal channel subjected with two heat sources, Journal of Thermal Analysis and Calorimetry, (2020), Online. doi.org/10.1007/s10973-020-09887-2
  16. Chen, A., et al., Experimental study on bubble characteristics of time periodic subcooled flow boiling in annular ducts due to wall heat flux oscillation, International Journal of Heat and Mass Transfer, 157 (2020), 119974.
  17. Tariq, H.A., et al., Hydro-thermal performance of normal-channel facile heat sink using TiO2-H2O mixture (Rutile-Anatase) nanofluids for microprocessor cooling, Online, Journal of Thermal Analysis and Calorimetry, (2020), Online. doi.org/10.1007/s10973-020-09838-x
  18. Shahsavar, A., et al., Numerical study of melting and solidifcation in a wavy double-pipe latent heat thermal energy storage system, Journal of Thermal Analysis and Calorimetry, (2020), 141:1785-1799.
  19. Bechir, M., et al. Numerical study of heat and mass transfer enhancement for bubble absorption process of ammonia-water mixture without and with nanofluids, Thermal Science, 22(6B), (2018), pp. 107-3120.
  20. Jaballah, R.B., et al. Enhancement of the performance of bubble absorber using hybrid nanofluid as a cooled absorption system, International Journal of Numerical Methods for Heat & Fluid Flow, 29(10), (2019), pp. 3857-3871.
  21. Jaballah, R.B., et al. The influence of hybrid nanofluid and coolant flow direction on bubble mode absorption improvement, Mathematical Methods in the Applied Sciences, (2020), pp. 1-15.
  22. Fong, K. F., et al., Performance advancement of solar air-conditioning through integrated system design for building, Energy, 73 (2014), pp. 987-996.
  23. Kim, S., et al., Performance simulation of ionic liquid and hydrofluorocarbon working fluids for an absorption refrigeration system, Ind. Eng. Chem. Res., 52(19) (2013), pp. 6329-6335.
  24. Liu, X. Y., et al., Performance comparison of two absorption compression hybrid refrigeration systems using R1234yf/ionic liquid as working pair, Energy Conversion and Management, 181 (2019), pp. 319-330.
  25. Misenheimer, C. T., et al., The development of a dynamic single effect, lithium bromide absorption chiller model with enhanced generator fidelity, Energy Conversion and Management, 150 (2017), pp. 574-587.
  26. González-Gil, A., et al., Experimental evaluation of a direct air-cooled lithium bromide-water absorption prototype for solar air conditioning, Applied Thermal Engineering, 31(16) (2011), pp. 3358-3368.
  27. El-Shaarawi, M. A. I., et al., Unsteady analysis for solar-powered hybrid storage LiBr-water absorption air-conditioning, Solar Energy, 144 (2017), pp. 556-568.
  28. Al-Amir, Q. R. et al., Performance Assessment of LiBr-H2O Absorption Chiller for Air Conditioning Purposes, Journal of Kerbala University, 15(3) (2017), pp. 160-173.
  29. McLinden, M. O., et al., A thermodynamic analysis of refrigerants: possibilities and tradeoffs for low-GWP refrigerants, International Journal of Refrigeration, 38 (2014), pp. 80-92.
  30. Moreno, D., et al., Absorption refrigeration cycles based on ionic liquids: refrigerant/absorbent selection by thermodynamic and process analysis, Applied Energy, 213 (2018), pp. 179-194.
  31. Paulechka, Y. U., et al.,Evaluation of thermodynamic properties for non-crystallizable ionic liquids, Thermochim Acta, 604 (2015), pp. 122-128.
  32. Razmi, A., et al., Thermodynamic and economic investigation of a novel integration of the absorption-recompression refrigeration system with compressed air energy storage (CAES), Energy Conversion and Management, 187 (2019), pp. 262-273.
  33. Hamida, B., et al. Heat and mass transfer enhancement for falling film absorption process in vertical plate absorber by adding copper nanoparticles, Arabian Journal of Science and Engineering, 43 (2018), pp. 4991-5001.
  34. Lizarte, R., et al., COP optimisation of a triple-effect H2O/LiBr absorption cycle under off-design conditions, Applied Thermal Engineering, 99 (2016), pp. 195-205.
  35. Said, Z., et al., Energy and exergy efficiency of a flat plate solar collector using pH treated Al2O3 nanofluid, Journal of Cleaner Production, 112 (2016), pp. 3915-3926.
  36. Raj, P., et al., A review of studies using nanofluids in flat-plate and direct absorption solar collectors, Renewable and Sustainable Energy Reviews, 84 (2018), pp. 54-74.
  37. Gupta, H. K., et al., Investigations for effect of Al2O3-H2O nanofluid flow rate on the efficiency of direct absorption solar collector, Case Studies in Thermal Engineering, 5 (2015), pp. 70-78.
  38. Sint, N., et al. Theoretical analysis to determine the efficiency of a CuO-water nanofluid based-flat plate solar collector for domestic solar water heating system in Myanmar, Solar Energy, 155 (2017), pp. 608-619.
  39. Sarsam, W. S., et al., A review of studies on using nanofluids in flat-plate solar collectors, Solar Energy, 122 (2015), pp. 1245-1265.
  40. Kasaeian, A., et al., A review on the applications of nanofluids in solar energy systems, Renewable and Sustainable Energy Reviews, 43 (2015), pp. 584-598.
  41. Atmaca, I., et al., Simulation of solar-powered absorption cooling system, Renewable Energy, 28(8) (2003), pp. 1277-1293.
  42. Beggs, C., Energy: management, supply and conservation. Routledge, (2010).
  43. Pilatowsky, I., et al., Performance evaluation of a monomethylamine-water solar absorption refrigeration system for milk cooling purposes, Applied thermal engineering, 24(7) (2004), pp. 1103-1115.
  44. Zakaria, I., et al. Thermal analysis of Al2O3-water ethylene glycol mixture nanofluid for single PEM fuel cell cooling plate: an experimental study, International Journal of Hydrogen Energy, 41(9) (2016), pp. 5096-5112.
  45. Hatami, M., et al., Thermal performance evaluation of alumina-water nanofluid in an inclined direct absorption solar collector (IDASC) using numerical method, Journal of Molecular Liquids, 231 (2017), pp. 632-639.
  46. Zhou, S., et al., Measurement of the specific heat capacity of water-based Al2O3 nanofluid, Applied Physics Letters, 92(9) (2008), 093123.
  47. Sekhar, Y. R., et al., Study of viscosity and specific heat capacity characteristics of water-based Al2O3 nanofluids at low particle concentrations, Journal of experimental Nanoscience, 10(2) (2015), pp. 86-102.
  48. Gupta, M., et al., A review on thermophysical properties of nanofluids and heat transfer applications, Renewable and Sustainable Energy Reviews, 74 (2017), pp. 638-670.
  49. Kumar, D., et al., A comprehensive review of preparation, characterization, properties and stability of hybrid nanofluids, Renewable and Sustainable Energy Reviews, 81 (2018), pp. 1669-1689.
  50. Zhang, Ji., et al., Thermal-hydraulic performance of SiC-water and Al2O3-water nanofluids in the minichannel, Journal of Heat Transfer, 138(2) (2016), 021705.
  51. Said, Z., et al., Energy and exergy efficiency of a flat plate solar collector using pH treated Al2O3 nanofluid, Journal of Cleaner Production, 112 (2016), pp. 3915-3926.
  52. Zawrah, M. F., et al., Stability and electrical conductivity of water-base Al2O3 nanofluids for different applications, HBRC Journal, 12(3) (2016), pp. 227-234.
  53. Nassan, T. H., et al., A comparison of experimental heat transfer characteristics for Al2O3/water and CuO/water nanofluids in square cross-section duct, International Communications in Heat and Mass Transfer, 37(7) (2010), pp. 924-928.
  54. Shahrul, I. M., et al., A comparative review on the specific heat of nanofluids for energy perspective, Renewable and sustainable energy reviews, 38 (2014), pp. 88-98.
  55. Haddad, Z., et al., A review on natural convective heat transfer of nanofluids, Renewable and Sustainable Energy Reviews, 16(7) (2012), pp. 5363-5378.
  56. Kerme, E. D., et al., Energetic and exergetic analysis of solar-powered lithium bromide-water absorption cooling system, Journal of Cleaner Production, 151 (2017), pp. 60-73.
  57. Ozgoren, M., et al., Hourly performance prediction of ammonia-water solar absorption refrigeration, Applied Thermal Engineering, 40 (2012), pp. 80-90.