Numerical modeling of adsorption desalination and investigation evaporator pipe lenght effect on desalinated water

Authors

1 Ph.D. Student, Mech. Eng., Ferdowsi University of Mashhad, Mashhad, Iran

2 Prof., Mech. Eng., Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

Adsorption desalination system employs low temperature waste heat, which is available in renewable energy sources. A three-dimensional transient model has been developed for modeling heat and mass transfer in adsorbent bed silicagel/water pair and validated by the experimental results. Evaporator is one of the main adsorption desalination parts and in this study, the effects of shell and tube evaporator pipe lenght on the performance ratio (PR) and specific daily water production (SDWP) are numerically investigated. According to modeling results, it was found that the performance ratio increases by increasing the evaporator pipe length, while aproaching 0.66. SDWP has an optimum cycle time for each evaporator pipe length, which increases with increasing the evaporator size. However, it was also found that the SDWP remains almost constant for evaporator pipe length larger than 4m. Specific daily water production increases by 11% for the pipe length increase from 2m to 4m, while it only increases by 6% when the pipe lenght increases from 4m to 8m.

Keywords

Main Subjects

References

[1] Eltawil MA, Zhengming Z, Yuan L (2009) A review of renewable energy technologies integrated with desalination systems. Renew. Sustain. Energy Rev. 13(9):2245-2262.
[2] Zheng H (2017) Chapter 8 - Absorption and Adsorption Solar Desalination System. In: Solar Energy Desalination Technology. edn. Edited by Zheng H. Amsterdam: Elsevier: 623-670.
[3] Tokarev MM, Gordeeva LG, Grekova AD, Aristov YI (2018) Adsorption cycle “heat from coldâ€‌ for upgrading the ambient heat: The testing a lab-scale prototype with the composite sorbent CaClBr/silica. Appl. Energy 211:136-145.
[4] Kim Y-D, Thu K, Masry ME, Ng KC (2014) Water quality assessment of solar-assisted adsorption desalination cycle. Desalination 344:144-151.
[5] Youssef PG, Mahmoud SM, Al-Dadah RK (2015) Performance analysis of four bed adsorption water desalination/refrigeration system, comparison of AQSOA-Z02 to silica-gel. Desalination 375:100-107.
[6] Youssef PG, Dakkama H, Mahmoud SM, Al-Dadah RK (2017) Experimental investigation of adsorption water desalination/cooling system using CPO-27Ni MOF. Desalination 404:192-199.
[7] Sadeghlu A, Yari M, Beidaghy Dizaji H (2015) Simulation study of a combined adsorption refrigeration system. Appl. Therm. Eng. 87:185-199.
[8] Sadri S, Ameri M, Haghighi Khoshkhoo R (2018) A new approach to thermo-economic modeling of adsorption desalination system. Desalination 428:69-75.
[9] Ng KC, Thu K, Saha BB, Chakraborty A (2012) Study on a waste heat-driven adsorption cooling cum desalination cycle. Int J Refrig 35(3):685-693.
[10] Wang X, Chua HT (2007) Two bed silica gel–water adsorption chillers: An effectual lumped parameter model. Int J Refrig 30(8):1417-1426.
[11] Sadeghlu A, Yari M, Mahmoudi SMS, Dizaji HB (2014) Performance evaluation of Zeolite 13X/CaCl2 two-bed adsorption refrigeration system. Int. J. Therm. Sci. 80:76-82.
[12] Wu JW, Biggs MJ, Pendleton P, Badalyan A, Hu EJ (2012) Experimental implementation and validation of thermodynamic cycles of adsorption-based desalination. Appl. Energy 98:190-197.
[13] Leong KC, Liu Y (2004) Numerical study of a combined heat and mass recovery adsorption cooling cycle. Int. J. Heat Mass Transf. 47(22):4761-4770.
[14] Chua HT, Ng KC, Wang W, Yap C, Wang XL (2004) Transient modeling of a two-bed silica gel–water adsorption chiller. Int. J. Heat Mass Transf. 47(4):659-669.
[15] Riffel DB, Wittstadt U, Schmidt FP, Nأ؛أ±ez T, Belo FA, Leite APF, Ziegler F (2010) Transient modeling of an adsorber using finned-tube heat exchanger. Int. J. Heat Mass Transf. 53(7):1473-1482.
[16] Mohammadzadeh Kowsari M, Niazmand H, Tokarev MM (2018) Bed configuration effects on the finned flat-tube adsorption heat exchanger performance: Numerical modeling and experimental validation. Appl. Energy 213:540-554.
[17] Mahdavikhah M, Niazmand H (2013) Effects of plate finned heat exchanger parameters on the adsorption chiller performance. Appl. Therm. Eng. 50(1):939-949.
[18] Elsheniti MB, Hassab MA, Attia A-E (2019) Examination of effects of operating and geometric parameters on the performance of a two-bed adsorption chiller. Appl. Therm. Eng. 146:674-687.
[19] Niazmand H, Dabzadeh I (2012) Numerical simulation of heat and mass transfer in adsorbent beds with annular fins. Int J Refrig 35(3):581-593.
[20] Zhang LZ, Wang L (1999) Effects of coupled heat and mass transfers in adsorbent on the performance of a waste heat adsorption cooling unit. Appl. Therm. Eng. 19(2):195-215.
[21] Yang P-z (2009) Heat and mass transfer in adsorbent bed with consideration of non-equilibrium adsorption. Appl. Therm. Eng. 29(14):3198-3203.
[22] Zhang LZ (2000) A three-dimensional non-equilibrium model for an intermittent adsorption cooling system. Sol Energy 69(1):27-35.
[23] Poyelle F, Guilleminot J, Meunier F: Experimental tests and predictive model of an adsorptive air conditioning unit. Ind Eng Chem Res , 19, 99. 38(1):298-309
[24] Mhimid A (1998) Theoretical study of heat and mass transfer in a zeolite bed during water desorption: validity of local thermal equilibrium assumption. Int. J. Heat Mass Transf. 41(19):2967-2977.
[25] El-Sharkawy II (2011) On the linear driving force approximation for adsorption cooling applications. Int J Refrig 34(3):667-673.
[26] Saha B, Chakraborty A, Koyama S, Aristov Y (2009) A new generation cooling device employing CaCl2-in-silica gel-water system. Int. J. Heat Mass Transf. 52(1-2):516-524.
[27] Miyazaki T, Akisawa A, Saha BB, El-Sharkawy II, Chakraborty A (2009) A new cycle time allocation for enhancing the performance of two-bed adsorption chillers. Int J Refrig 32(5):846-853.
[28] Wang DC, Xia ZZ, Wu JY, Wang RZ, Zhai H, Dou WD (2005) Study of a novel silica gel–water adsorption chiller. Part I. Design and performance prediction. Int J Refrig 28(7):1073-1083.
[29] Ali ES, Askalany AA, Harby K, Diab MR, Alsaman AS (2018) Adsorption desalination-cooling system employing copper sulfate driven by low grade heat sources. Appl. Therm. Eng. 136:169-176.
 
[30] Alsaman AS, Askalany AA, Harby K, Ahmed MS (2017) Performance evaluation of a solar-driven adsorption desalination-cooling system. Energy 128:196-207.
[31] Ng KC, Thu K, Kim Y, Chakraborty A, Amy G (2013) Adsorption desalination: An emerging low-cost thermal desalination method. Desalination 308:161-179.
[32] Thu K, Saha BB, Chua KJ, Ng KC (2016) Performance investigation of a waste heat-driven 3-bed 2-evaporator adsorption cycle for cooling and desalination. Int. J. Heat Mass Transf. 101:1111-1122.
[33] Thimmaiah PC, Sharafian A, Rouhani M, Huttema W, Bahrami M (2017) Evaluation of low-pressure flooded evaporator performance for adsorption chillers. Energy 122:144-158.
[34] Han J, S. Fletcher L (1985) Falling film evaporation and boiling in circumferential and axial grooves on horizontal tubes, vol. 24.
Journal of Solid and Fluid Mechanics
Volume 12, Issue 4
September and October 2022
Pages 145-157

Files

Share

How to cite

Statistics