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Evaluation of mass absorption in LiBr flat-fan sheets

Author

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  • Palacios, E.
  • Izquierdo, M.
  • Marcos, J.D.
  • Lizarte, R.

Abstract

Experiments were conducted to determine the absorption rates of refrigerant vapour in an aqueous lithium bromide flat-fan sheet for use in absorption air-conditioning systems. The solution flow rates tested ranged from 0.023 to 0.054 kg/s (84-194 kg/h), with pressure losses in the injection nozzle of from 40 to 250 kPa. The effect of the mass flow rate on both solution residence time and the sheet deformation rate was also analyzed in absorption chambers of a pre-defined length, along with the effect of the sub-cooling temperature on the amount of vapour absorbed. The downstream evolution of approach to equilibrium factor F was quantified. The mass transfer coefficient values were found to be over 3 x 10-4 m/s. In absorption chambers 100 mm long, over 0.8 g/s l of vapour were absorbed per chamber absorption volume. Moreover, about 600 g of vapour were absorbed per kJ of solution flow work. Flat-fan sheet configurations were found to perform better than falling film and spray absorbers.

Suggested Citation

  • Palacios, E. & Izquierdo, M. & Marcos, J.D. & Lizarte, R., 2009. "Evaluation of mass absorption in LiBr flat-fan sheets," Applied Energy, Elsevier, vol. 86(12), pages 2574-2582, December.
    • Handle: RePEc:eee:appene:v:86:y:2009:i:12:p:2574-2582
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    Citations

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    Cited by:

    1. Ventas, R. & Vereda, C. & Lecuona, A. & Venegas, M., 2012. "Experimental study of a thermochemical compressor for an absorption/compression hybrid cycle," Applied Energy, Elsevier, vol. 97(C), pages 297-304.
    2. Izquierdo, M. & Marcos, J.D. & Palacios, M.E. & González-Gil, A., 2012. "Experimental evaluation of a low-power direct air-cooled double-effect LiBr–H2O absorption prototype," Energy, Elsevier, vol. 37(1), pages 737-748.
    3. González-Gil, A. & Izquierdo, M. & Marcos, J.D. & Palacios, E., 2012. "New flat-fan sheets adiabatic absorber for direct air-cooled LiBr/H2O absorption machines: Simulation, parametric study and experimental results," Applied Energy, Elsevier, vol. 98(C), pages 162-173.
    4. Mortazavi, Mehdi & Nasr Isfahani, Rasool & Bigham, Sajjad & Moghaddam, Saeed, 2015. "Absorption characteristics of falling film LiBr (lithium bromide) solution over a finned structure," Energy, Elsevier, vol. 87(C), pages 270-278.
    5. Jorge J. Chan & Roberto Best & Jesús Cerezo & Mario A. Barrera & Francisco R. Lezama, 2018. "Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH 3 -LiNO 3," Energies, MDPI, vol. 11(8), pages 1-16, August.
    6. Cola, Fabrizio & Hey, Jonathan & Romagnoli, Alessandro, 2018. "Characterization of the droplet formation phase for the H2OLiBr absorber: An analytical and experimental analysis," Applied Energy, Elsevier, vol. 222(C), pages 885-897.
    7. Dong, Li & Zheng, Danxing & Nie, Nan & Li, Yun, 2012. "Performance prediction of absorption refrigeration cycle based on the measurements of vapor pressure and heat capacity of H2O+[DMIM]DMP system," Applied Energy, Elsevier, vol. 98(C), pages 326-332.
    8. Izquierdo, M. & González-Gil, A. & Palacios, E., 2014. "Solar-powered single-and double-effect directly air-cooled LiBr–H2O absorption prototype built as a single unit," Applied Energy, Elsevier, vol. 130(C), pages 7-19.
    9. Sehgal, Shitiz & Alvarado, Jorge L. & Hassan, Ibrahim G. & Kadam, Sambhaji T., 2021. "A comprehensive review of recent developments in falling-film, spray, bubble and microchannel absorbers for absorption systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 142(C).
    10. Amaris, Carlos & Vallès, Manel & Bourouis, Mahmoud, 2018. "Vapour absorption enhancement using passive techniques for absorption cooling/heating technologies: A review," Applied Energy, Elsevier, vol. 231(C), pages 826-853.

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