Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3
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...
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MDPI AG
2018-08-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/11/8/2137 |
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| author | Jorge J. Chan Roberto Best Jesús Cerezo Mario A. Barrera Francisco R. Lezama |
| author_facet | Jorge J. Chan Roberto Best Jesús Cerezo Mario A. Barrera Francisco R. Lezama |
| author_sort | Jorge J. Chan |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T20:50:46Z |
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| id | doaj.art-2dfe533f3e39412e80e51c0d99fa2f7a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:50:46Z |
| publishDate | 2018-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2dfe533f3e39412e80e51c0d99fa2f7a2022-12-22T04:03:51ZengMDPI AGEnergies1996-10732018-08-01118213710.3390/en11082137en11082137Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3Jorge J. Chan0Roberto Best1Jesús Cerezo2Mario A. Barrera3Francisco R. Lezama4Facultad de Ingeniería, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n Col, Buenavista 24030, Campeche, MéxicoInstituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62580, Morelos, MéxicoCentro de Investigación en Ingeniería y Ciencias Aplicadas, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca 62209, MéxicoInstituto de Energías Renovables, Universidad Nacional Autónoma de México, Temixco 62580, Morelos, MéxicoFacultad de Ingeniería, Universidad Autónoma de Campeche, Av. Agustín Melgar s/n Col, Buenavista 24030, Campeche, MéxicoAbsorption 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.http://www.mdpi.com/1996-1073/11/8/2137bubble absorberabsorption coolingammonia-lithium nitrateplate heat exchanger |
| spellingShingle | Jorge J. Chan Roberto Best Jesús Cerezo Mario A. Barrera Francisco R. Lezama Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 Energies bubble absorber absorption cooling ammonia-lithium nitrate plate heat exchanger |
| title | Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 |
| title_full | Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 |
| title_fullStr | Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 |
| title_full_unstemmed | Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 |
| title_short | Experimental Study of a Bubble Mode Absorption with an Inner Vapor Distributor in a Plate Heat Exchanger-Type Absorber with NH3-LiNO3 |
| title_sort | experimental study of a bubble mode absorption with an inner vapor distributor in a plate heat exchanger type absorber with nh3 lino3 |
| topic | bubble absorber absorption cooling ammonia-lithium nitrate plate heat exchanger |
| url | http://www.mdpi.com/1996-1073/11/8/2137 |
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