Effect of axial solid heat conduction and mass diffusion in a rotary heat and mass regenerator

San, Jung‐Yang; Hsiau, S.C.

doi:10.1016/s0017-9310(05)80136-x

Cited by 37 publications

(14 citation statements)

References 13 publications

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“…They are termed as ''gas side resistance models". With the increasing knowledge of the diffusion mechanism inside the desiccant material, ''gas and solid side resistance models" which take both gas side and solid side resistance into account are developed by many researchers [9][10][11][12][13]. It can be learned that compared with gas side resistance models, gas and solid side resistance models are more related to the actual process in the desiccant wheel.…”

Section: Introductionmentioning

confidence: 99%

A mathematical model for predicting the performance of a compound desiccant wheel (A model of compound desiccant wheel)

Ziegler

Wang

2010

Applied Thermal Engineering

135

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Section: Introductionmentioning

confidence: 99%

A mathematical model for predicting the performance of a compound desiccant wheel (A model of compound desiccant wheel)

Ziegler

Wang

2010

Applied Thermal Engineering

135

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“…(22). The resulting normalized forms of the mass and energy balances at the interface are, respectively:…”

Section: Final Remarksmentioning

confidence: 99%

“…A significant number of studies was carried out to predict the behaviour of air dehumidifying systems using simplified mathematical models (e.g., [17][18][19][20][21][22][23][24][25][26][27]). In most of them, the heat and mass transport phenomena occurring inside the porous desiccant medium are not described in a very detailed way, simplified approaches being adopted instead.…”

Section: Introductionmentioning

confidence: 99%

On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems

Ruivo

Costa

Figueiredo

2008

International Journal of Thermal Sciences

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In the present work, a detailed model of simultaneous heat and mass transfer through a desiccant micro-porous medium of a channel wall of compact heat and mass exchangers, such as desiccant wheels, was developed. The relevant phenomena considered by this model within the porous medium are surface diffusion of the adsorbed water, Knudsen diffusion of water vapour, heat conduction and the sorption process. A onedimensional formulation of this model is used to investigate the validity of two simplifying approaches based on the lumped-capacitance method. One consists of neglecting the transversal heat and mass transfer resistances within the porous medium, the other of cancelling only the thermal resistance.Results are presented for a wide range of values of the layer thickness of the porous medium. It is concluded that the hypothesis of nullresistances in the cross direction is valid only for layer thicknesses lower than 0.1 mm, approximately, while the approach based on the thermal lumped capacitance model is valid for layer thicknesses lower than 5 mm. Finally, a dimensional analysis of interfacial balances leads to the conclusion that the Biot number for surface diffusion is several orders of magnitude higher than the corresponding thermal Biot number.

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“…San and Hsiau [2] developed a one-dimensional (1-D) transient heat and mass transfer model to analyze the effect of axial heat conduction and mass diffusion on the performance of a desiccant wheel and discussed that Biot number (Bi) and NTU were two important parameters which affected the dehumidification ability. Dai et al [1] evaluated the dehumidification performance of desiccant wheel on the basis of wave shape through wave analysis using psychrometric chart and discussed the effects of some important parameters, such as heat capacity, adsorption heat, rotational speed, regeneration temperature, thickness of the desiccant matrix and desiccant isotherm on the performance.…”

Section: Introductionmentioning

confidence: 99%

Comparative performance of desiccant wheel with effective and ordinary regeneration sector using mathematical model

Yadav

2014

Heat Mass Transfer

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A mathematical model for predicting the performance of a desiccant wheel with effective regeneration sector has been used. This model has been used to conduct a comparative performance of desiccant wheel with effective and ordinary regeneration sector. It was found that for all the cases considered in this study like rotation of wheel, regeneration temperature, velocity and ambient moisture, the desiccant wheel with ''effective regeneration sector'' gives better result as compared to ordinary regeneration sector.

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Effect of axial solid heat conduction and mass diffusion in a rotary heat and mass regenerator

Cited by 37 publications

References 13 publications

A mathematical model for predicting the performance of a compound desiccant wheel (A model of compound desiccant wheel)

A mathematical model for predicting the performance of a compound desiccant wheel (A model of compound desiccant wheel)

On the validity of lumped capacitance approaches for the numerical prediction of heat and mass transfer in desiccant airflow systems

Comparative performance of desiccant wheel with effective and ordinary regeneration sector using mathematical model

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