Vapor absorption by immobile solution layer

Nakoryakov, V. E.; Bufetov, N. S.; Grigorieva, N. I.; Dekhtyar, R. A.; Marchuk, I. V.

doi:10.1016/j.ijheatmasstransfer.2003.10.017

Cited by 16 publications

(4 citation statements)

References 15 publications

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“…X s not close to unity) will make advective terms relevant [22]. Nakoryakov and co workers [35] also included advection in their model of absorption into a stagnant layer. Eq.…”

Section: Bþmentioning

confidence: 99%

Modelling non-isothermal absorption of vapour into expanding liquid sheets

Acosta-Iborra

García

Santana

2009

International Journal of Heat and Mass Transfer

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a b s t r a c tThe problem of non isothermal absorption of vapour into freely expanding liquid sheets is addressed in this study. This is done in the context of four models that characterise the coupled heat and mass transfer in the liquid phase: a nonlinear model retaining the effect of sheet growth, an approximate model for slowly increasing mass flow rate in the sheet, a large Lewis number model and finally, a boundary layer model. These models have been numerically or analytically solved and applied to the comparative anal ysis of two different working pairs, LiBr H 2 O and LiNO 3 NH 3 , under conditions representative of adia batic absorption in refrigeration systems. The limits of applicability of each model have been assessed and the sensitivity of the results to the sheet aperture angle, heat of absorption and initial subcooling has also been tested. For equal initial mass fraction and subcooling, the models indicate that Sherwood number and the rate of absorption in laminar expanding sheets for the LiNO 3 NH 3 solution are always superior to those for the LiBr H 2 O solution.

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“…X s not close to unity) will make advective terms relevant [22]. Nakoryakov and co workers [35] also included advection in their model of absorption into a stagnant layer. Eq.…”

Section: Bþmentioning

confidence: 99%

Modelling non-isothermal absorption of vapour into expanding liquid sheets

Acosta-Iborra

García

Santana

2009

International Journal of Heat and Mass Transfer

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“…Одним из таких способов является введение в раствор поверхностно-активного вещества (ПАВ), которое приводит к возникновению приповерхностной конвекции и к интенсификации процессов переноса. Однако в экспериментах с использованием ПАВ трудно разделить вклад в тепло-и массоперенос конвективного и вынужденного течения, поэтому удобным объектом исследования является абсорбция пара неподвижным слоем раствора, когда вынужденное течение отсутствует [5][6][7][8][9]. В работе [5] показано, что в начальный период абсорбции, когда тепловой и диффузионный слои достаточно тонкие, малые градиенты концентрации и температуры приводят к возникновению движения жидкости в слое абсорбента.…”

Section: экспериментальное исследование термокапиллярной конвекции в unclassified

“…В работе [5] показано, что в начальный период абсорбции, когда тепловой и диффузионный слои достаточно тонкие, малые градиенты концентрации и температуры приводят к возникновению движения жидкости в слое абсорбента. В работе [6] показано, что при введении в раствор ПАВ в неподвижном слое жидкости возникает интенсивное конвективное перемешивание, что приводит к интенсификации переноса теплоты и массы при абсорбции по сравнению с раствором без ПАВ [7][8][9]. При неизотермической абсорбции в отсутствии ПАВ имеется градиент температуры и концентрации абсорбента на поверхности жидкости.…”

Section: экспериментальное исследование термокапиллярной конвекции в unclassified

An experimental investigation of thermo-capillary convection in solution of lithium bromide at non-isothermal absorption

Bufetov¹,

Dekhtyar²,

Ovchinikov³

2016

VMGTU

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“…Analytical expressions for the temperature and concentration profiles were reported. Nakoryakov et al [15,16] also analyzed the heat and mass transfer during vapor absorption by a stagnant solution layer. They presented an analytical solution for short and long times.…”

Section: List Of Symbolsmentioning

confidence: 99%

Numerical investigation of transient heat and mass transfer in a parallel-flow liquid-desiccant absorber

Dı́az

2010

Heat Mass Transfer

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Liquid desiccant systems have received significant attention as a way to reduce latent loads. Tests of liquid desiccant systems in humid climates have shown significant reductions in energy consumption. As moisture in the air is absorbed at the dehumidifier, the temperature of the liquid desiccant increases due to the addition of heat from the enthalpy of condensation of the water vapor. Thus, the coupled effects of heat and mass transfer are relevant for these applications. A two-dimensional mathematical model of the transient heat and mass transfer for an absorber where a thin film of liquid desiccant flows down its walls and dehumidifies the air in parallel-flow configuration is developed and the dynamics of the modeled system are analyzed. List of symbols

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Vapor absorption by immobile solution layer

Cited by 16 publications

References 15 publications

Modelling non-isothermal absorption of vapour into expanding liquid sheets

Modelling non-isothermal absorption of vapour into expanding liquid sheets

An experimental investigation of thermo-capillary convection in solution of lithium bromide at non-isothermal absorption

Numerical investigation of transient heat and mass transfer in a parallel-flow liquid-desiccant absorber

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