Abstract
The performance of an adsorption heat pump is a function of the equilibrium uptake and diffusion resistances of a particular system, which determines the refrigerant throughput during a cycle. Previous studies have sought improved sorption bed performance by increasing heat transfer; however, some of the proposed heat exchanger enhancements represent costly alterations to the system. This work instead investigates a method for optimizing sorption bed mass transfer, which can be implemented as a low-cost alternative to heat transfer enhancement or in addition to it. The objective is to balance the intra-particle diffusion resistance, which increases with adsorbent particle diameter, with the inter-particle pressure drop, which decreases with adsorbent particle diameter. A silica gel–water system model is used to show that the optimal particle geometry in a packed bed yields a 48% improvement in cooling duty and over 50% increase in coefficient of performance compared with larger particles (dp = 1.42 mm).
References
1.
Hulse
, G.
, 1929
, “Freight Car Refrigeration by an Adsorption System Employing Silica Gel
,” Refrig. Eng.
, 17
(2
), pp. 41
–54
.2.
Amar
, N. B.
, Sun
, L. M.
, and Meunier
, F.
, 1996
, “Numerical Analysis of Adsorptive Temperature Wave Regenerative Heat Pump
,” Appl. Therm. Eng.
, 16
(5
), pp. 405
–418
. 3.
de Nevers
, N.
, 2005
, Fluid Mechanics for Chemical Engineers
, 3rd ed., McGraw-Hill
, New York
.4.
Sun
, L. M.
, Feng
, Y.
, and Pons
, M.
, 1997
, “Numerical Investigation of Adsorptive Heat Pump Systems With Thermal Wave Heat Regeneration Under Uniform-Pressure Conditions
,” Int. J. Heat Mass Transfer
, 40
(2
), pp. 281
–293
. 5.
Marletta
, L.
, Maggio
, G.
, Freni
, A.
, Ingrasciotta
, M.
, and Restuccia
, G.
, 2002
, “A Non-uniform Temperature Non-uniform Pressure Dynamic Model of Heat and Mass Transfer in Compact Adsorbent Beds
,” Int. J. Heat Mass Transfer
, 45
(16
), pp. 3321
–3330
. 6.
Maggio
, G.
, Freni
, A.
, and Restuccia
, G.
, 2006
, “A Dynamic Model of Heat and Mass Transfer in a Double-Bed Adsorption Machine With Internal Heat Recovery
,” Int. J. Refrig.
, 29
(4
), pp. 589
–600
. 7.
Restuccia
, G.
, Freni
, A.
, and Maggio
, G.
, 2002
, “A Zeolite-Coated Bed for Air Conditioning Adsorption Systems: Parametric Study of Heat and Mass Transfer by Dynamic Simulation
,” Appl. Therm. Eng.
, 22
(6
), pp. 619
–630
. 8.
Chua
, H. T.
, Ng
, K. C.
, Wang
, W.
, Yap
, C.
, and Wang
, X. L.
, 2004
, “Transient Modeling of a Two-Bed Silica Gel-Water Adsorption Chiller
,” Int. J. Heat Mass Transfer
, 47
(4
), pp. 659
–669
. 9.
Liu
, Y.
, and Leong
, K. C.
, 2008
, “Numerical Modeling of a Zeolite/Water Adsorption Cooling System With Non-constant Condensing Pressure
,” Int. Commun. Heat Mass Transfer
, 35
(5
), pp. 618
–622
. 10.
Zhang
, L. Z.
, 2000
, “A Three-Dimensional Non-equilibrium Model for an Intermittent Adsorption Cooling System
,” Sol. Energy
, 69
(1
), pp. 27
–35
. 11.
Tather
, M.
, Tantekin-Ersolmaz
, B.
, and Erdem-Senatalar
, A.
, 1999
, “A Novel Approach to Enhance Heat and Mass Transfer in Adsorption Heat Pumps Using the Zeolite-Water Pair
,” Microporous Mesoporous Mater.
, 27
(1
), pp. 1
–10
. 12.
Tather
, M.
, and Erdem-Senatalar
, A.
, 2002
, “When Do Thin Zeolite Layers and a Large Void Volume in the Adsorber Limit the Performance of Adsorption Heat Pumps?
,” Microporous Mesoporous Mater.
, 54
(1–2
), pp. 89
–96
. 13.
Szarzynski
, S.
, Feng
, Y.
, and Pons
, M.
, 1997
, “Study of Different Internal Vapour Transports for Adsorption Cycles With Heat Regeneration
,” Int. J. Refrig.
, 20
(6
), pp. 390
–401
. 14.
Gui
, Y. B.
, and Wang
, R. Z.
, 2001
, “Practical Three-Heat-Reservoir Model on Heat-Regenerative Adsorption Air-Conditioning System
,” Appl. Therm. Eng.
, 21
(16
), pp. 1643
–1656
. 15.
Yong
, L.
, and Sumathy
, K.
, 2002
, “Review of Mathematical Investigation on the Closed Adsorption Heat Pump and Cooling Systems
,” Renewable Sustainable Energy Rev.
, 6
(4
), pp. 305
–338
. 16.
Pesaran
, A.
, Lee
, H.
, Hwang
, Y.
, Radermacher
, R.
, and Chun
, H.-H.
, 2016
, “Review Article: Numerical Simulation of Adsorption Heat Pumps
,” Energy
, 100
(2
), pp. 310
–320
. 17.
Chakraborty
, A.
, Saha
, B. B.
, Ng
, K. C.
, Koyama
, S.
, and Srinivasan
, K.
, 2009
, “Theoretical Insight of Physical Adsorption for a Single-Component Adsorbent + Adsorbate System: I. Thermodynamic Property Surfaces
,” Langmuir
, 25
(4
), pp. 2204
–2211
. 18.
Raymond
, A.
, 2010
, “Investigation of Microparticle to System Level Phenomena in Thermally Activated Adsorption Heat Pumps
,” Master’s thesis
, Georgia Institute of Technology
, Atlanta, GA
.19.
Harvey
, A. H.
, and Lemmon
, E. W.
, 2004
, “Correlation for the Second Virial Coefficient of Water
,” J. Phys. Chem. Ref. Data
, 33
(1
), pp. 369
–376
. 20.
Raymond
, A.
, and Garimella
, S.
, 2021
, “A Theoretical Treatment of the Design and Optimization of Adsorption Heat Pumps
,” Appl. Therm. Eng.
, 184
(2
), p. 116305
. 21.
Clausse
, M.
, Meunier
, F.
, Coulie
, J.
, and Herail
, E.
, 2008
, “Comparison of Adsorption Systems for Polygeneration Systems Based on Fuel Cells
,” International Sorption Heat Pump Conference
, Seoul, South Korea
, Sept. 23–26
, pp. 114
–119
.22.
Radu
, A. I.
, Defraeye
, T.
, Ruch
, P.
, Carmeliet
, J.
, and Derome
, D.
, 2017
, “Insights From Modeling Dynamics of Water Sorption in Spherical Particles for Adsorption Heat Pumps
,” Int. J. Heat Mass Transfer
, 105
(3
), pp. 326
–337
. 23.
Dias
, J. M. S.
, and Costa
, V. A. F.
, 2019
, “Which Dimensional Model for the Analysis of a Coated Tube Adsorber for Adsorption Heat Pumps?
” Energy
, 174
(2
), pp. 1110
–1120
. 24.
Mueller
, G. E.
, 1992
, “Radial Void Fraction Distributions in Randomly Packed Fixed Beds of Uniformly Sized Spheres in Cylindrical Containers
,” Powder Technol.
, 72
(3
), pp. 269
–275
. 25.
Mueller
, G. E.
, 1999
, “Radial Void Fraction Correlation for Annular Packed Beds
,” AIChE J.
, 45
(11
), pp. 2458
–2460
. 26.
Mueller
, G. E.
, 2002
, “Narrow Annular Packed-Bed Radial Void Fraction Correlation
,” AIChE J.
, 48
(3
), pp. 644
–647
. 27.
Tien
, C.
, 1994
, Adsorption Calculations and Modeling
, Butterworth-Heinemann
, Boston
.28.
Rupam
, T. H.
, Islam
, M. A.
, Pal
, A.
, Chakraborty
, A.
, and Saha
, B. B.
, 2019
, “Thermodynamic Property Surfaces for Various Adsorbent/Adsorbate Pairs for Cooling Applications
,” Int. J. Heat Mass Transfer
, 144
(6
), p. 118579
. 29.
Chua
, H. T.
, Ng
, K. C.
, Chakraborty
, A.
, Oo
, N. M.
, and Othman
, M. A.
, 2002
, “Adsorption Characteristics of Silica Gel + Water Systems
,” J. Chem. Eng. Data
, 47
(5
), pp. 1177
–1181
. 30.
Hamamoto
, Y.
, Alam
, K. C. A.
, Akisawa
, A.
, and Kashiwagi
, T.
, 2005
, “Performance Evaluation of a Two-Stage Adsorption Refrigeration Cycle With Different Mass Ratio
,” Int. J. Refrig.
, 28
(3
), pp. 344
–352
. 31.
Saha
, B. B.
, El-Sharkawy
, I. I.
, Chakraborty
, A.
, and Koyama
, S.
, 2007
, “Study on an Activated Carbon Fiber-Ethanol Adsorption Chiller: Part I—System Description and Modeling
,” Int. J. Refrig.
, 30
(1
), pp. 86
–95
. 32.
Di
, J.
, Wu
, J. Y.
, Xia
, Z. Z.
, and Wang
, R. Z.
, 2007
, “Theoretical and Experimental Study on Characteristics of a Novel Silica Gel-Water Chiller Under the Conditions of Variable Heat Source Temperature
,” Int. J. Refrig.
, 30
(3
), pp. 515
–526
. Copyright © 2022 by ASME
You do not currently have access to this content.
