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Ammonia-water absorption refrigeration system has much more superiority in environmental protection and energy saving. However the COP of ammonia-water absorption refrigeration system is relatively low. Absorption enhancement is an effective way to improve COP of ammonia-water absorption refrigeration system. In this study, magnetic field was employed in the falling film absorption outside vertical tube with ammonia-water. Firstly, the mathematical model of ammonia-water falling film absorption in magnetic field has been built up. Magnetic field force was introduced to the mathematical model. In the process of modelling, the variation of falling film thickness, the variation of physical characteristics of ammonia-water and the convection in the direction of the film thickness were considered. The distribution of temperature, velocity and concentration in falling film were acquired through numerical derivation. Then, the micro mechanism of effect on ammonia-water solution and its absorption was analyzed. The numerical results show that the velocity along falling, the thickness and the concentration of falling filmall increased in magnetic field. The micro mechanism analysis show that external magnetic field will increase the activity of solution. External magnetic field has positive effect on the falling absorption of ammonia-water.
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Pages: ICR07-B1-378
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Details
- Original title: A study on the effect of magnetic field on falling film absorption outside vertical tube with ammonia-water.
- Record ID : 2007-2586
- 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: Ammonia-water; Absorption system; Simulation; Performance; Modelling; Falling film; Magnetic field; 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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Numerical study of falling film and bubble abso...
- Author(s) : CASTRO J., OLIET C., FARNÓS J., 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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Simulation of hot water driven absorption refri...
- Author(s) : CUI X. Y., TANG C., XU Z. P., 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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