The effect of inert (noncondensable) gases on the heat and mass transfer (absorption) for channel flow of water vapor in conjunction with falling aqueous LiBr films is investigated. The hydrodynamic flow of the gas in the channel is approximated as fully developed. This is a “fair” assumption because of the low Reynolds numbers resulting from the low prevailing absorber pressures. The film flow is also assumed to be hydrodynamically developed. This greatly simplifies the problem, as the momentum equation need not be considered. Otherwise the continuity, species, and thermal energy equations govern the problem. Numerical results for a nominal case are presented for the velocity, temperature, and species distributions in the gas and liquid phase regions, and for the interface absorption rate. The effects of varying several parameters (including inerts concentration) on the above variables are also presented. Comparisons are also made with limited data in the literature.

1.
Ameel, T. A., and Wood, B. D., 1992, “Non-absorbable Gas Effects on Heat and Mass Transfer in Wavy Laminar Film Absorption,” Proceedings ASME/JSES/KSES International Solar Energy Conference, Vol. 1, pp. 219–228.
2.
Andberg, J. W., 1982, “Non-isothermal Absorption of Gases into Falling Liquid Films,” M.S. Thesis, University of Texas, Austin, TX.
3.
Andberg, J. W., and Vliet, G. C., 1983, “Nonisothermal Absorption of Gases into Falling Films,” Proc. of the ASME/JSME Thermal Engineering Joint Conf., Vol. 2, Honolulu, HI, Mar., p. 423.
4.
Andberg, J. W., and Vliet, O. C., 1987, “Absorption of Vapors into Liquid Films Flowing Over Cooled Horizontal Tubes,” ASME/JSME Joint Thermal Engineering Conference, Honolulu, HI, Mar.
5.
Burdukov
A. P.
, and
Bufetov
N. S.
,
1980
, “
Experimental Study of the absorption of Water Vapor by Thin Films of Aqueous Lithium Bromide
,”
Heat Transfer-Soviet Res.
, Vol.
12
, pp.
965
979
.
6.
Cosenza, F., and Vliet, G. C., 1990, “Absorption in Falling Water/LiBr Films on Horizontal Tubes,” ASHRAE Transactions, Vol. 96, Pt. 1.
7.
Grossman
G.
,
1983
, “
Simultaneous Heat and Mass Transfer in Film Absorption Under Laminar Flow
,”
Int. J. Heat and Mass Transfer
, Vol.
26
, pp.
357
371
.
8.
Grossman
G.
, and
Heath
M. T.
,
1984
, “
Simultaneous Heat and Mass Transfer in Absorption of Gases in Turbulent Liquid Films
,”
Int. J. Heat and Mass Transfer
, Vol.
27
, pp.
2365
2376
.
9.
Grossman, G., 1986, “Heat and Mass Transfer in Film Absorption,” Handbook of Heat and Mass Transfer, N. P. Cheremisinoff, ed., Vol. 2, Gulf Publishing Co., pp. 211–257.
10.
Grossman, G., 1990, “Film Absorption Heat and Mass Transfer in the Presence of Non-Condensables,” Proc. 9th Int. Heat Mass Transfer Conference, Vol. 6, pp. 247–252.
11.
Habib, H. M., Ameel, T. A., and Wood, B. D., 1991, “Effects of a Non-Absorbable Gas on the Heat and Mass Transfer for the Entrance Region of a Falling Film Absorber,” International Solar Energy Conference, Reno, NV.
12.
Habib, H. M., and Wood, B. D., 1989, “Effect of a Non-Absorbable Gas on the Performance of a Falling Film Absorber for Open-cycle Absorption Solar Cooling System,” ASME Solar Energy Division (SED), pp. 247–255.
13.
Haseldon
G.
, and
Malaty
S.
,
1959
, “
Heat and Mass Transfer Accompanying the Absorption of Ammonia in Water
,”
Trans. Institution of Chemical Engineers
, Vol.
37
, No.
10
, pp.
137
146
.
14.
Loewer, H., 1960, “Thermodynamiche und Physikalische Eigenschaften der Wassrigen Lithiumbromide-Losung,” Ph.D. Dissertation, Karlsruhe.
15.
Murray, J. G., 1993, “Purge Systems for Absorption Phenomena in Water-Lithium Bromide Films,” Proceedings of the Japanese Absorption Heat Pump Conference, Tokyo, Japan, Oct.
16.
Nakoryakov
V. E.
, and
Grigor’eva
N. I.
,
1977
a, “
Combined Heat and Mass Transfer During Absorption in Drops and Films
,”
Inzh.-Fiz.
Vol.
32
, pp.
399
405
.
17.
Nakoryakov
V. E.
, and
Grigor’eva
N. I.
,
1977
b, “
Exact Solution of Combined Heat and Mass Transfer Problem During Film Absorption
,”
Inzh.-Fiz. Zh.
Vol.
33
, pp.
893
898
.
18.
Patankar, S. V., 1980, Numerical Heat Transfer and Fluid Flow, Hemisphere Publishing Corporation.
19.
Schlicting, H., 1955, Boundary Layer Theory, McGraw-Hill, New York.
20.
Siebe, D. A., Wood, B. D., and Collier, R. K., 1986, “Open-Cycle Absorption Solar Cooling: Part III Evaluation of Air-Conditioning Systems Utilizing Liquid Absorbents Regenerated by Solar Energy,” Final Report for DOE Contract, DE-AC03-84SF121223, Arizona State University, Temple, AZ.
21.
Vliet, G. C., and Chen, W., 1993, “Location of Non-Absorbable Gases in a Simplified Absorber Geometry,” Proceedings of the 1994 International Absorption Heat Pump Conference, New Orleans, LA., Jan.
22.
Vliet, G. C., and Cosenza, F., 1991, “Absorption Phenomena in Water-Lithium Bromide Falling Films,” Japanese Absorption Heat Pump Conference, Tokyo, Japan, Sept.-Oct.
23.
Yang
R.
, and
Chen
J. H.
,
1991
, “
A Numerical Study of the Non-absorbable Effects on the Falling Liquid Film Absorption
,”
Warme-und Stoffubertragung
, Vol.
26
, pp.
219
223
.
24.
Yang, R., and Wood, B. D., 1988, “Heat and Mass Transfer in Laminar Wavy Film Absorption with the Presence of Non-absorbable Gases,” Proceedings of the National Heat Transfer Conference, Houston, Texas, July, HTD-96, Vol. 3, pp. 141–148.
This content is only available via PDF.
You do not currently have access to this content.