Results 151 to 160 of about 7,418 (207)

Falling film evaporation of binary mixtures

AIChE Journal, 1994
AbstractThe interactive effects of heat and mass transfer in evaporation of binary mixtures flowing as falling films on vertical surfaces was investigated. Evaporative heat‐transfer coefficients were measured for aqueous mixtures of ethylene and propylene glycol, with boiling ranges up to 55°C.
J. W. Palen, Qi Wang, J. C. Chen
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The falling film MSF evaporator

Desalination, 1976
Abstract The application of falling film heat transfer to the MSF cycle permits use of CO2 for scale prevention at no cost and the building of efficient very small capacity units with heating surfaces that are fully accessible during operation. It also becomes possible to use doubly fluted tubes for a 2 3 saving in heating surface requirements.
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Surface evaporation of turbulent falling films

International Journal of Heat and Mass Transfer, 1991
Abstract In refrigeration and heat pump applications, falling film evaporators should be very attractive due to high heat transfer coefficients with negligible pressure drop. In this paper results from an experimental study with refrigerant R12 are reported.
Anders Åsblad, Thore Berntsson
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Modelling of multiple-effect falling-film evaporators

International Journal of Food Science and Technology, 1983
Abstract The classic mathematical model of multi-effect evaporators operating in forward flow was combined with an accurate estimation of the overall heat transfer coefficient (HTC) in falling-film evaporators. For this correlation developed by Narayanamurthy & Sarma (1977) has been used. It was possible also to estimate the order of
SANDRO ANGELETTI, MAURO MORESI
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Calcium sulphate scaling in falling film evaporators

Desalination, 1974
Abstract The formation of calcium sulphate scale in Vertical Tube Evaporators (VTE) of the falling film type has been investigated in a single tube experiment using fluted tubes. It was found that the scaling threshold is dependent not only on the brine concentration and temperature, but also on the heat flux to the evaporating film.
T.D. Hodgson, M.N. Elliot, T.W.J. Jordan
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Conjugate heat transfer during falling film evaporation

International Communications in Heat and Mass Transfer, 1995
Abstract An analytical solution is derived for a transient conjugate heat transfer problem in three domains: a solid wall, an evaporating falling liquid film, and a flowing gas. The physical model comprises a vertical wall, heated on one side by radiation and convection and cooled on its other side by two fluids: a falling water film at the top and ...
I. Arshavski, Y. Nekhamkin, S. Olek, E. Elias   +3 more
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Non-evaporating black liquor falling film hydrodynamics

Nordic Pulp & Paper Research Journal, 2009
Knowledge of wave behaviour is a key factor for understanding heat transfer in falling film evaporators. Here the industrially important fluid black liquor has been examined, together with water which has been used as a reference. Notable results are that there are large local fluctuations in the film thickness; for instance at a Re number of 4100 in ...
Miriam Johansson, Lennart Vamling, Lars Olausson   +2 more
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Alcohol recovery in falling film evaporators

Applied Thermal Engineering, 2002
Falling film evaporators can be used to recover alcohol and other volatile compounds from waste products, and as part of the primary production process. A simple model has been developed to predict the performance of the equipment. Measurements made on commercial installations have confirmed the validity of the model over a range of operating ...
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Scale deposition from an evaporating falling film

Desalination, 1975
Abstract A study was made of the factors governing CaCO3 scale deposition from an evaporating falling film, on a heated aluminum tube. A kinetic model was developed describing scale layer growth. The results of this work provide a basic background enabling a more rational approach for conducting practical work related to the scaling problem.
E. Gazit, D. Hasson
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Computational modeling of turbulent evaporating falling films

International Journal of Heat and Mass Transfer, 2015
Abstract The primary objective of this study is to construct a computational model for turbulent, free-falling liquid films subjected to evaporative heating. The model is developed for two-dimensional axisymmetric flow on a vertical circular tube, with both the computational domain and operating conditions matching those of an experimental database ...
Chirag R. Kharangate, Hyoungsoon Lee, Issam Mudawar   +2 more
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