Dynamic simulation of a recuperative adsorption heat pump

Cacciola, G.; Hajji, A.; Maggio, G.; Restuccia, G.

doi:10.1016/0360-5442(93)90085-r

Cited by 34 publications

(9 citation statements)

References 5 publications

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“…In this study, heat and mass transfer in a granular adsorbent bed for an isobaric adsorption process is investigated numerically. The approach of present non-dimensional study is different than the approaches reported in literature [11][12][13]. Under the performed assumptions, nine independent variables which effect heat and mass transfer in the bed are combined only in two independent variables as G and Γ.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 97%

“…Heat and mass transfer equations for adsorbent bed and mass transfer equation for adsorbent particle are non-dimensionalized in their study. Cacciola et al [11] performed a study on dynamic simulation of recuperative adsorption heat pump. They used uniform temperature and pressure model and made the governing equations dimensionless to find the variations of temperatures of reactors, condenser and evaporator and to determine thermal power during system operation.…”

Section: Introductionmentioning

confidence: 99%

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A parametric study on isobaric adsorption process in a closed adsorbent bed

İliş

Mobedi

Ülkü

2010

International Communications in Heat and Mass Transfer

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A numerical study on heat and mass transfer in an annular adsorbent bed filled with adsorbent granules for an isobaric adsorption process is performed. In order to reduce the number of independent parameters that influences heat and mass transfer in the bed, the governing equations and related initial and boundary conditions for the problem are non-dimensionalized and this yields two dimensionless parameters as G and Γ. The G dimensionless parameter is the ratio of heat of adsorption to sensible heat stored by adsorbent particle and Γ parameter compares mass diffusion within the adsorbent particle and heat diffusion in the radial direction of the adsorbent bed. The obtained results show that the total dimensionless time for an adsorption process can be reduced by increasing of Γ value. The total dimensionless time is independent from G for low values of Γ (i.e. Γ = 10 ). The present study is performed for Γ values from 10 − 5 to 1 and G value from 1 to 100.

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Section: Contents Lists Available At Sciencedirectmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

A parametric study on isobaric adsorption process in a closed adsorbent bed

İliş

Mobedi

Ülkü

2010

International Communications in Heat and Mass Transfer

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“…Heat and mass transfer equations for adsorbent bed and mass transfer equation for adsorbent particle are non-dimensionalized in their study. Other theoretical studies on heat and mass transfer in a closed adsorption system can also be found in literature [9][10][11][12]. Heat and mass transfer rate in an adsorbent bed of a closed adsorption system depends on many parameters such as particle size, thermal conductivity, thermal diffusivity, adsorption equilibria, mass diffusivity, and porosity.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

A dimensionless analysis of heat and mass transport in an adsorber with thin fins; uniform pressure approach

İliş

Mobedi

Ülkü

2011

International Communications in Heat and Mass Transfer

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A numerical study on heat and mass transfer in an annular adsorbent bed assisted with radial fins for an isobaric adsorption process is performed. A uniform pressure approach is employed to determine the changes of temperature and adsorbate concentration profiles in the adsorbent bed. The governing equations which are heat transfer equation for the adsorbent bed, mass balance equation for the adsorbent particle, and conduction heat transfer equation for the thin fin are non-dimensionalized in order to reduce number of governing parameters. The number of governing parameters is reduced to four as Kutateladze number, thermal diffusivity ratio, dimensionless fin coefficient and dimensionless parameter of Γ which compares mass diffusion in the adsorbent particle to heat transfer through the adsorbent bed. Temperature and adsorbate concentration contours are plotted for different values of defined dimensionless parameters to discuss heat and mass transfer rate in the bed. The average dimensionless temperature and average adsorbate concentration throughout the adsorption process are also presented to compare heat and mass transfer rate of different cases. The values of dimensionless fin coefficient, Γ number and thermal diffusivity ratio are changed from 0.01 to 100, 1 to 10 − 5 and 0.01 to 100, respectively; while the values of Kutateladze number are 1 and 100. The obtained results revealed that heat transfer rate in an adsorbent bed can be enhanced by the fin when the values of thermal diffusivity ratio and fin coefficient are low (i.e., α ⁎ = 0.01, Λ = 0.01). Furthermore, the use of fin in an adsorbent bed with low values of Γ number (i.e. Γ = 10 − 5) does not increase heat transfer rate, significantly.

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“…As expected, these models can be used to obtain a theoretical limit regarding performance and capacity of a system, but are not able to identify causes of poor performance when examining experimental data. Several thermodynamic models can be found in the literature [33,34,35,36].…”

Section: Review Of Mathematical Modelsmentioning

confidence: 99%

“…Cacciola et al [33,34,35] proposed thermodynamic models to predict the performance of an adsorption heat pump machine. However, in their analysis, the performance of the system is limited by the heat transfer inside the sorption bed only, and an equilibrium adsorption state was assumed.…”

Section: Thermodynamic Modelsmentioning

confidence: 99%

Modelling and Optimization of an Adsorption Cooling System for Automotive Applications

Trindade¹

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Dynamic simulation of a recuperative adsorption heat pump

Cited by 34 publications

References 5 publications

A parametric study on isobaric adsorption process in a closed adsorbent bed

A parametric study on isobaric adsorption process in a closed adsorbent bed

A dimensionless analysis of heat and mass transport in an adsorber with thin fins; uniform pressure approach

Modelling and Optimization of an Adsorption Cooling System for Automotive Applications

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