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Small capacity, air-cooled NH3-H2O absorption systems are becoming more attractive in applications where the input energy can be obtained for free, e.g. solar energy, exhaust gases of engines, etc., due to the increasing price of the primary energy. In this work, an air-cooled absorption refrigeration system for transport application is being studied. As it is well known, the absorber is the most critical heat exchanger due to its low heat and mass transfer coefficients. In this work, two types of suitable absorber are modelled: falling film flow and bubble flow. A review of literature has been done, and a validation has been performed comparing the results of the models with the published results. The nominal working conditions of the absorber have been obtained from a thermodynamic simulation of the whole cycle. The performance of the two types of absorbers is compared for this application.
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Pages: ICR07-E1-1085
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Details
- Original title: Numerical study of falling film and bubble absorbers for small capacity NH3-H2O air-cooled absorption systems.
- Record ID : 2008-0629
- Languages: English
- Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Publication date: 2007/08/21
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Indexing
- Themes: Absorption and adsorption systems
- Keywords: Bubble; Ammonia-water; Absorption system; Performance; Optimization; Modelling; Falling film; Absorber
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A MODEL OF AN AMMONIA-WATER FALLING FILM ABSORBER.
- Author(s) : PEREZ BLANCO H.
- Date : 1988
- Languages : English
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A study on the effect of magnetic field on fall...
- Author(s) : NIU X. F., DU K., CHEN T., et al.
- Date : 2007/08/21
- Languages : English
- Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
- Formats : PDF
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Numerical study of absorption in a laminar fall...
- Author(s) : GOMMED K., GROSSMAN G., KOENIG M. S.
- Date : 2001
- Languages : English
- Source: ASHRAE Transactions. 2001 Winter Meeting, Atlanta, GA. Volume 107, part 1 + CD-ROM.
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Numerical study of falling-film heat and mass t...
- Author(s) : KWON K., JEONG S.
- Date : 2006/05/21
- Languages : English
- Source: ACRA-2006. Proceedings of the 3rd Asian conference on refrigeration and air conditioning.
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Numerical results of falling film absorption wi...
- Author(s) : WASSENAAR R. H., SEGAL A.
- Date : 1998/07/06
- Languages : English
- Source: Thermodynamics, heat and mass transfer of refrigeration machines and heat pumps. Proceedings of the EUROTHERM Seminar 59./ Thermodynamique et transferts de chaleur et de masse dans les machines à froid et pompes à chaleur. Comptes rendus du séminaire EUROTHERM 59.
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