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Article

Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3

1
Facultad de Ingeniería, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n Col, Buenavista 24030, Campeche, México
2
Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62580, Morelos, México
3
Centro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca 62209, México
*
Author to whom correspondence should be addressed.
Energies 2018, 11(8), 2137; https://doi.org/10.3390/en11082137
Received: 16 July 2018 / Revised: 7 August 2018 / Accepted: 10 August 2018 / Published: 16 August 2018
(This article belongs to the Special Issue Heat and Mass Transfer in Energy Systems)
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 NH3-LiNO3 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 NH3-LiNO3 working pair. View Full-Text
Keywords: bubble absorber; absorption cooling; ammonia-lithium nitrate; plate heat exchanger bubble absorber; absorption cooling; ammonia-lithium nitrate; plate heat exchanger
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MDPI and ACS Style

Chan, J.J.; Best, R.; Cerezo, J.; Barrera, M.A.; Lezama, F.R. Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3. Energies 2018, 11, 2137. https://doi.org/10.3390/en11082137

AMA Style

Chan JJ, Best R, Cerezo J, Barrera MA, Lezama FR. Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3. Energies. 2018; 11(8):2137. https://doi.org/10.3390/en11082137

Chicago/Turabian Style

Chan, Jorge J., Roberto Best, Jesús Cerezo, Mario A. Barrera, and Francisco R. Lezama. 2018. "Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3" Energies 11, no. 8: 2137. https://doi.org/10.3390/en11082137

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