CFD study on Beds of an Adsorption desalination system in order to improve bed performance

Document Type : Research Article

Authors

Department of Mechanical Engineering, University of Hormozgan, Bandar Abbas, Iran

Abstract

One of the critical elements of an adsorption desalination system is the adsorption bed. The system dynamics of a 2-bed single-stage silica gel plus water-based adsorption desalination system were analyzed. A great pattern was expanded using energy conservation and mass connected with the kinetics of the adsorption/desorption process. Computational fluid dynamics (CFD) modeling was used to simulate the adsorption process for a rectangular finned tube-based adsorption bed featured with silica gel adsorbent substance. The adsorbents in the simulation were considered solid volume with defined porosity based on the Darcy equation. The adsorption and desorption modes of  the adsorption bed was simulated. CFD techniques were then applied to study fin thickness and height. The results showed that decreasing the fin thickness increased the water uptake by up to 8% and decreasing the fin height from 30mm to 20mm increased the water uptake by up to 17%. CFD technique was also used to investigate the effects of plate type on the adsorption bed performance. The results showed that the copper plate improved the water uptake up to 9%. The temperature decline of adsorption bed caused by the copper plate was up to 11% more than that of the aluminum plate.

Keywords

References

[1] Harby, K., Ali, E.S., Almohammadi, K.M., 2021. A novel combined reverse osmosis and hybrid absorption desalination-cooling system to increase overall water recovery and energy efficiency, Journal of Cleaner Production, 287, 125014-125024. https://doi.org/10.1016/j.jclepro.2020.125014
[2] Feria-Díaz, J.J., López-Méndez, M.C., Rodríguez-Miranda, J.P., Sandoval-Herazo, L.C., Correa-Mahecha, F., 2021. Commercial thermal technologies for desalination of water from renewable energies: A state of the art review, Processes, 9(2), 262-273. https://doi.org/10.3390/pr9020262
[3] Amirfakhraei, A., Zarei, T., Khorshidi, J.J.T.S., 2020. Performance improvement of adsorption desalination system by applying mass and heat recovery processes, Thermal Science and Engineering Progress, 18, 100516-100527. https://doi.org/10.1016/j.tsep.2020.100516
[4] Majdi, M.S., Al-Dadah, R., Mahmoud, S., Elsayed, E., El-Samni, O., 2020. Wire fin heat exchanger using aluminium fumarate for adsorption heat pumps, Applied Thermal Engineering, 164, 114426-114437. https://doi.org/10.1016/j.applthermaleng.2019.114426
[5] Shakib, S., Amidpour, M., Ghafoorian, M.M., 2019. Optimization of a Hybrid Multi-effect Desalination with Thermal Vapor Compression and Reverse Osmosis Desalination System Integrated to A Gas Turbine Cycle, Amirkabir Journal of Mechanixal Engineering, 50(6), 1333-1350. https://doi.org/10.22060/MEJ.2017.12982.5491
[6] Verde, M., Cortés, L., Corberán, J., Sapienza, A., Vasta, S., Restuccia, G.J.A.T.E., 2010. Modelling of an adsorption system driven by engine waste heat for truck cabin A/C. Performance estimation for a standard driving cycle, 30(13), 1511-1522. https://doi.org/10.1016/j.applthermaleng.2010.04.005
[7] Srivastava, N., Eames, I.J.A.t.e., 1998. A review of adsorbents and adsorbates in solid–vapour adsorption heat pump systems, Applied Thermal Engineering, 18(9-10), 707-714. https://doi.org/10.1016/S1359-4311(97)00106-3
[8] Youssef, P.G., Mahmoud, S., Al-Dadah, R.K., 2015. Effect of evaporator temperature on the performance of water desalination/refrigeration adsorption system using AQSOA-ZO2, World Academy of Science, Engineering and Technology, International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering, 9(6), 701-705. https://www.scinapse.io/papers/2621193895
[9] Saha, B., Koyama, S., Kashiwagi, T., Akisawa, A., Ng, K.C., Chua, H.J.I.J.o.R., 2003. Waste heat driven dual-mode, multi-stage, multi-bed regenerative adsorption system, International Journal of Refrigeration, 26(7), 749-757. https://doi.org/10.1016/S0140-7007(03)00074-4
[10] Chua, H.T., Ng, K.C., Malek, A., Kashiwagi, T., Akisawa, A., Saha, B.J.I.j.o.R., 1999. Modeling the performance of two-bed, sillica gel-water adsorption chillers, International Journal of Refrigeration, 22(3), 194-204. https://doi.org/10.1016/S0140-7007(98)00063-2
[11] Mohammed, R.H., Mesalhy, O., Elsayed, M.L., Chow, L.C., 2017. Novel compact bed design for adsorption cooling systems: parametric numerical study, International Journal of Refrigeration, 80, 238-251. https://doi.org/10.1016/j.ijrefrig.2017.04.028
[12] Saliba, S., Ruch, P., Volksen, W., Magbitang, T.P., Dubois, G., Michel, B., 2016, Combined influence of pore size distribution and surface hydrophilicity on the water adsorption characteristics of micro-and mesoporous silica, Microporous and Mesoporous Materials, 226, 221–228. https://doi.org/10.1016/j.micromeso.2015.12.029
[13] Stefanski, S., Nowak, W., Sztekler, K., Kalawa, W., Siwek, T., 2019. Applicability of adsorption cooling/desalination systems driven by low- temperature waste heat, IOP Conference Series: Earth and Environmental Science, 214, 121-126. https://doi.org/10.1088/1755-1315/214/1/012126
[14] Tamainot-Telto, Z., Metcalf, S.J., Critoph, R.E.J.I.J.o.R., 2009. Novel compact sorption generators for car air conditioning, International Journal of Refrigeration, 32(4), 727-733. https://doi.org/10.1016/j.ijrefrig.2008.11.010
[15] Vasta, S., Freni, A., Sapienza, A., Costa, F., Restuccia, G.J.I.J.o.R., 2012. Development and lab-test of a mobile adsorption air-conditioner, International Journal of Refrigeration, 35(3), 701-708. https://doi.org/10.1016/j.ijrefrig.2011.03.013
[16] Freni, A., Maggio, G., Cipitì, F., Aristov, Y.I.J.A.T.E., 2012. Simulation of water sorption dynamics in adsorption chillers: One, two and four layers of loose silica grains, Applied Thermal Engineering, 44, 69-77. https://doi.org/10.1016/j.applthermaleng.2012.03.038
[17] Thu, K., Chakraborty, A., Kim, Y.-D., Myat, A., Saha, B.B., Ng, K.C.J.D., 2013. Numerical simulation and performance investigation of an advanced adsorption desalination cycle, Desalination, 308, 209-218. https://doi.org/10.1016/j.desal.2012.04.021
[18] Wang, D., Zhang, J., Tian, X., Liu, D., Sumathy, K.J.R., Reviews, S.E., 2014. Progress in silica gel–water adsorption refrigeration technology, Renewable and Sustainable Energy Reviews, 30, 85-104. https://doi.org/10.1016/j.rser.2013.09.023
[19] Shi, B., AL-Dadah, R., Mahmoud, S., Elsayed, A., Rezk, A.J.P.o.I., 2013. Mathematical and CFD modelling for a rectangular finned tube adsorption bed for automotive cooling system, International Conference on Applied Energy ICAE 2013, Jul 1-4, 2013, Pretoria, South Africa.
[20] Ali, S.M., Chakraborty, A.J.E.C., 2016. Adsorption assisted double stage cooling and desalination employing silica gel+ water and AQSOA-Z02+ water systems, Energy Conversion and Management, 117, 193-205. https://doi.org/10.1016/j.enconman.2016.03.007
[21] Alsaman, A.S., Askalany, A.A., Harby, K., Ahmed, M.S.J.E., 2017. Performance evaluation of a solar-driven adsorption desalination-cooling system, Energy, 128, 196-207. https://doi.org/10.1016/j.energy.2017.04.010
[22] Lu, T.J., 1999. Heat transfer efficiency of metal honeycombs, International Journal of Heat and Mass Transfer, 42(11), 2031-2040. https://doi.org/10.1016/S0017-9310(98)00306-8
[23] Sharafian, A., Bahrami M.J.R., 2014. Assessment of adsorber bed designs in waste-heat driven adsorption cooling systems for vehicle air conditioning and refrigeration, Renewable and Sustainable Energy Reviews, 30, 440-451. https://doi.org/10.1016/j.rser.2013.10.031
Chemical Process Design
Volume 1, Issue 2
December 2022
Pages 59-73

Files

Share

How to cite

Statistics