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Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH 3 -LiNO 3

Author

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  • Jorge J. Chan

    (Facultad de Ingeniería, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n Col, Buenavista 24030, Campeche, México)

  • Roberto Best

    (Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62580, Morelos, México)

  • Jesús Cerezo

    (Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca 62209, México)

  • Mario A. Barrera

    (Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62580, Morelos, México)

  • Francisco R. Lezama

    (Facultad de Ingeniería, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n Col, Buenavista 24030, Campeche, México)

Abstract

Absorption systems are a sustainable solution as solar driven air conditioning devices in places with warm climatic conditions, however, the reliability of these systems must be improved. The absorbing component has a significant effect on the cycle performance, as this process is complex and needs efficient heat exchangers. This paper presents an experimental study of a bubble mode absorption in a plate heat exchanger (PHE)-type absorber with NH 3 -LiNO 3 using a vapor distributor in order to increase the mass transfer at solar cooling operating conditions. The vapor distributor had a diameter of 0.005 m with five perforations distributed uniformly along the tube. Experiments were carried out using a corrugated plate heat exchanger model NB51, with three channels, where the ammonia vapor was injected in a bubble mode into the solution in the central channel. The range of solution concentrations and mass flow rates of the dilute solution were from 35 to 50% weight and 11.69 to 35.46 × 10 −3 kg·s −1 , respectively. The mass flow rate of ammonia vapor was from 0.79 to 4.92 × 10 −3 kg·s −1 and the mass flow rate of cooling water was fixed at 0.31 kg·s −1 . The results achieved for the absorbed flux was 0.015 to 0.024 kg m −2 ·s −1 and the values obtained for the mass transfer coefficient were in the order of 0.036 to 0.059 m·s −1 . The solution heat transfer coefficient values were obtained from 0.9 to 1.8 kW·m −2 ·K −1 under transition conditions and from 0.96 to 3.16 kW·m −2 ·K −1 at turbulent conditions. Nusselt number correlations were obtained based on experimental data during the absorption process with the NH 3 -LiNO 3 working pair.

Suggested Citation

  • 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.
  • Handle: RePEc:gam:jeners:v:11:y:2018:i:8:p:2137-:d:164076
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    References listed on IDEAS

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    1. 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.
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    Cited by:

    1. Junhyeok Yong & Junggyun Ham & Ohkyung Kwon & Honghyun Cho, 2021. "Experimental Investigation of the Heat Transfer Characteristics of Plate Heat Exchangers Using LiBr/Water as Working Fluid," Energies, MDPI, vol. 14(20), pages 1-15, October.
    2. Karolina Weremijewicz & Andrzej Gajewski, 2021. "Measurement Uncertainty Estimation for Laser Doppler Anemometer," Energies, MDPI, vol. 14(13), pages 1-11, June.
    3. Alvaro A. S. Lima & Gustavo de N. P. Leite & Alvaro A. V. Ochoa & Carlos A. C. dos Santos & José A. P. da Costa & Paula S. A. Michima & Allysson M. A. Caldas, 2020. "Absorption Refrigeration Systems Based on Ammonia as Refrigerant Using Different Absorbents: Review and Applications," Energies, MDPI, vol. 14(1), pages 1-41, December.
    4. Ancuta C. Abrudan & Octavian G. Pop & Alexandru Serban & Mugur C. Balan, 2019. "New Perspective on Performances and Limits of Solar Fresh Air Cooling in Different Climatic Conditions," Energies, MDPI, vol. 12(11), pages 1-22, June.

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