每年出版 18 期
ISSN 打印: 1064-2285
ISSN 在线: 2162-6561
IF:
1.7
5-Year IF:
1.4
Immediacy Index:
0.6
Eigenfactor:
0.00072
JCI:
0.43
SJR:
0.318
SNIP:
0.568
CiteScore™::
3.5
H-Index:
28
Indexed in
AMMONIA-WATER ABSORPTION PROCESS ON FALLING FILMS AT VERTICAL AND INCLINED PLATES
Get access
摘要
Based on the falling film technology, this paper presents an analysis of the process of ammonia-water mixtures absorption on inclined flat plates at several tilt angles by the finite-difference method. Overall balance relations of mass, ammonia species, and energy along with heat and mass transfer experimental correlations were solved for a set of control volumes discretized over the plate lengthwise. First, typical operational conditions of a simple-effect absorption refrigeration cycle were set in order to define the range of interest. Next, a nondimensional analysis of the absorption process was carried out for several plate inclination positions in several operational conditions, including: plate length, plate inclination angle, surface temperature, and inlet thermodynamic state of the liquid and vapor phases. The results showed that the optimum absorbing plate angle was at the vertical position. Two performance criteria were used to evaluate the absorption process: thermal effectiveness and mass transfer effectiveness. Among all the tested conditions, the thermal effectiveness was always higher than the mass effectiveness in the same conditions. Finally, the numerical results of the falling film absorption process were successfully validated with experimental data available in the open literature.
-
Bu, X., Ma, W., and Huang, Y., Numerical Study of Heat and Mass Transfer of Ammonia-Water in Falling Film Evaporator, Heat Mass Transf.., vol. 48, no. 5, pp. 725-734, 2012.
-
Colburn, A.P. and Drew, T.B., The Condensation of Mixed Vapors, Trans. Am. Inst. Chem. Eng., vol. 33, pp. 197-212, 1937.
-
Conde-Petit, M., Thermophysical Properties of NH3 + Hfl Solutions for the Industrial Design of Absorption Refrigeration Equipment, Zurich, Switzerland: M. Conde Engineering, 2006.
-
Fernandez-Seara, J., Sieres, J., Rodriguez, C., and Vazquez, M., Ammonia-Water Absorption in Vertical Tubular Absorbers, Int. J. Therm. Sci., vol. 44, no. 3, pp. 277-288, 2005.
-
Hoffmann, L. and Ziegler, F., Experimental Investigation of Heat and Mass Transfer with Aqueous Ammonia, Proc. Int. Absorption Heat Pump Conf., Montreal, Canada, vol. 1, pp. 383-392, 17-20 September 1996.
-
Jeong, S., Lee, S.K., Koo, K.K., and Ziegler, F., Heat Transfer Performance of a Coiled Tube Absorber with Working Fluid of Ammonia/Water/Discussion, ASHRAE Conf, San Francisco, CA, vol. 104, p. 1577, 1998.
-
Kang, Y.T., Akisawa, A., and Kashiwagi, T., Experimental Correlation of Combined Heat and Mass Transfer for NH3-H2O Falling Film Absorption, Int. J. Refrig., vol. 22, no. 4, pp. 250-262, 1999.
-
Kwon, K. and Jeong, S., Effect of Vapor Flow on the Falling-Film Heat and Mass Transfer of the Ammonia-Water Absorber, Int. J. Refrig., vol. 27, no. 8, pp. 955-964, 2004.
-
Lee, K.B., Chun, B.H., Lee, J.C., Hyun, J.C., and Kim, S.H., Comparison of Heat and Mass Transfer in Falling Film and Bubble Absorbers of Ammonia-Water, Exp. Heat Transf., vol. 15, no. 3, pp. 191-205, 2002.
-
Lee, S., Development of Techniques for In-Situ Measurement of Heat and Mass Transfer in Ammonia-Water Absorption Systems, PhD, Georgia Institute of Technology, 2007.
-
Lee, S., Bohra, L.K., Garimella, S., and Nagavarapu, A.K., Measurement of Absorption Rates in Horizontal-Tube Falling-Film Ammonia-Water Absorbers, Int. J. Refrig., vol. 35, no. 3, pp. 613-632, 2012.
-
Leite, B.M., Modeling of the Ammonia-Water Absorption and Generation Processes by Using Liquid Film Thickness over Inclined Plates, MSc, Escola Politecnica of University of Sao Paulo, 2015 (in Portuguese).
-
Morrison, J.N.A. and Deans, J., Augmentation of Steam Condensation Heat Transfer by Addition of Ammonia, Int. J. Heat Mass Transf, vol. 40, no. 4, pp. 765-772, 1997.
-
Narvaez-Romo, B. and Simoes-Moreira, J.R., Falling Liquid Film Evaporation in Subcooled and Saturated Water over Horizontal Heated Tubes, Heat Transf. Eng., vol. 38, no. 3, pp. 361-376, 2017.
-
Narvaez-Romo, B., Chhay, M., Zavaleta-Aguilar, E.W., and Simoes-Moreira, J.R., A Critical Review of Heat and Mass Transfer Correlations for LiBr-H2O and NH3-H2O Absorption Refrigeration Machines Using Falling Liquid Film Technology, Appl. Therm. Eng., vol. 123, pp. 1079-1095, 2017.
-
Rivera, W., Experimental Heat and Mass Transfer Coefficients in Two-Phase Flow for the Ammonia-Water and Ammonia-Lithium Nitrate Mixtures, Proc. of the Int. Absorption Heat Pump Conf., Montreal, Canada, vol. 1, pp. 327-334, 17-20 September 1996.
-
Sieres, J. and Fernandez-Seara, J., Calculation Procedure to Determine Average Mass Transfer Coefficients in Packed Columns from Experimental Data for Ammonia-Water Absorption Refrigeration Systems, Heat Mass Transf., vol. 44, no. 10, pp. 1229-1239, 2008.
-
Sieres, J. and Fernandez-Seara, J., Modeling of Simultaneous Heat and Mass Transfer Processes in Ammonia-Water Absorption Systems from General Correlations, Heat Mass Transf., vol. 44, no. 1, pp. 113-123, 2007.
-
Treybal, R.E., Mass Transfer Operations, Singapore: McGraw-Hill Book Co., pp. 78-87, 1981.
-
Triche, D., Bonnot, S., Perier-Muzet, M., Boudehenn, F., Demasles, H., and Caney, N. Experimental and Numerical Study of a Falling Film Absorber in an Ammonia-Water Absorption Chiller, Int. J. Heat Mass Transf., vol. 111, pp. 374-385, 2017.
-
Wilke, W., Heat Transfer to Falling Liquid Films (Warmeubergang an Rieselfilme), Ver. Deut. Ingrs (VDI) Forschungsheft, vol. 490, pp. 1-36, 1962.
-
Zavaleta-Aguilar, E.W. and Simoes-Moreira, J.R., Horizontal Tube Bundle Falling Film Distiller for Ammonia-Water Mixtures, Int. J. Refrig., vol. 59, pp. 304-316, 2015.
-
Xie Hanguang, Zong Yuan, Shen Lian, Dai Gance, Interfacial mass transfer intensification with highly viscous mixture, Chemical Engineering Science, 236, 2021. Crossref
-
Zhou Runfa, Wang Minqi, Li Shuhong, Theoretical analysis of the enhancement effect of ultrasonic oscillation on NH3H2O falling film absorption process, Applied Thermal Engineering, 211, 2022. Crossref
-
Zhao Chuang-Yao, Qi Di, Ji Wen-Tao, Jin Pu-Hang, Tao Wen-Quan, A comprehensive review on computational studies of falling film hydrodynamics and heat transfer on the horizontal tube and tube bundle, Applied Thermal Engineering, 202, 2022. Crossref
-
Narváez-Romo Beethoven, Zavaleta-Aguilar Elí W., Simões-Moreira José R., Heat and mass transfer in falling films technology applied to the generator and the rectifier of an ammonia-water absorption refrigeration cycle, International Journal of Refrigeration, 135, 2022. Crossref
-
Maliackal Akhil Krishnan, Ganesan A.R., Mani A., Heat transfer enhanced surfaces for horizontal tube falling film evaporator characterized using laser interferometry, Applied Thermal Engineering, 210, 2022. Crossref