Journal ArticleDOI
Analysis of a bubble absorber working with R22 and five organic absorbents
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In this paper, a model of the absorption process in a vertical tubular bubble absorber working with R22-DMF, R 22-DMA, R22 -DMETEG and R 22 -NMP is developed using finite element method employing Galerkin's technique.Abstract:
A model of the absorption process in a vertical tubular bubble absorber working with R22-DMF, R22-DMA, R22-DMETEG, R22-DMEDEG and R22-NMP is developed using finite element method employing Galerkin's technique. The objective of this paper is to study the influence of the liquid and gas properties on the volumetric mass transfer coefficient. Analysis have also been done using ammonia-water as working fluid, the results obtained are compared with those in the literature and the agreement is found to be good. A correlation for mass transfer coefficient is proposed as a function of Reynolds number, Schmidt number and length to diameter ratio. The correlation can be used either in estimating the mass transfer rates or in fixing up any of the major design parameters namely length required for complete absorption and diameter.read more
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Journal ArticleDOI
Development of bubble absorption refrigeration technology: A review
Xi Wu,Shiming Xu,Mengnan Jiang +2 more
TL;DR: In this paper, the development of bubble absorption refrigeration technologies is discussed from the aspects of driving energies, performance enhancement and application extension, and methods of enhancing bubble absorption performance were researched, and also the influence mechanisms of these physical and chemical methods were explained.
Journal ArticleDOI
A study on numerical simulations and experiments for mass transfer in bubble mode absorber of ammonia and water
TL;DR: In this paper, both the numerical and experimental analyses in the absorption process of a bubble mode absorber were performed, where gas was injected into the bottom of the absorber at a constant solution flow rate.
Journal ArticleDOI
Ammonia absorption from a bubble expanding at a submerged orifice into water
TL;DR: In this article, a gaseous mixture of ammonia and nitrogen was bubbled into water and the growth curve, volume, surface area and shape of the growing bubbles were measured with parameters such as inlet gas composition, gas flow rate and gas chamber volume.
Journal ArticleDOI
Experiments on a bubble absorber
TL;DR: In this paper, experiments were carried out on a bubble absorber operating as part of a vapour absorption refrigeration system working with HCFC22-DMF to obtain heat and mass transfer and pressure drop data.
Journal ArticleDOI
Heat and mass transfer studies on compact generator of R134a/DMF vapour absorption refrigeration system
P. Balamurugan,Annamalai Mani +1 more
TL;DR: In this article, the performance of a compact generator of R134a/DMF vapour absorption refrigeration system is investigated and empirical correlations for Nusselt number and Sherwood number are proposed.
References
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Book
Applied finite element analysis
TL;DR: In this article, the authors present a computer program for two-dimensional field problems for structural and solid mechanics, including axisymmetric elasticity and Torsion of noncircular sections.
Journal ArticleDOI
Heat and mass transfer in vertical tubular bubble absorbers for ammonia-water absorption refrigeration systems
TL;DR: In this article, a model is developed for calculation of simultaneous heat and mass transfer processes in vertical bubble absorbers as used for ammonia-water absorption refrigeration systems, and the mass transfer coefficients resulting from these experiments are correlated by a modified Sherwood relation.
Journal ArticleDOI
Two-phase flow—IV. Gas and liquid side mass transfer coefficients
G. Kasturi,J.B. Stepanek +1 more
TL;DR: In this article, a model based on the analogy between momentum and mass transfer has been proposed for the rate of mass transfer in the liquid phase and a correlation in terms of dimensionless groups is presented for the gas side mass transfer coefficient.