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Simulation of adsorption process in a rotary solid desiccant wheel

Norazam, A. S. and Kamar, H. M. and Kamsah, N. and Alhamid, M. I. (2019) Simulation of adsorption process in a rotary solid desiccant wheel. In: 10th International Meeting of Advances in Thermofluids - Smart City: Advances in Thermofluid Technology in Tropical Urban Development, IMAT 2018, 16-17 Nov 2018, Grand Inna Hotel Kuta, Bali, Indonesia.


Official URL: https://dx.doi.org/10.1063/1.5086559


Solid desiccant air dehumidifier system is widely being used to supply dry air for many industrial processes. As humid atmospheric air flows through the system, the water vapor in the air is adsorbed by the desiccant material, resulting in dry air leaving the system. The performance of the system is usually determined through experimental work. However, this practice is often complex to carry as it requires precise measuring instruments, time consuming and it can be labor intensive too. A numerical solution has become a preferred choice to determine the performance of the system. The goal of this work is to determine the moisture removal capacity (MRC), thermal effectiveness (ϵth) and dehumidification effectiveness (ϵDW) of a solid desiccant wheel of an air dehumidifier system by a validated numerical method. A representative two-dimensional model of the air channel was developed and meshed using triangular elements. Flow simulations were carried out under a transient condition. The numerical model was validated by comparing the simulation results at the outlet of the air channel with similar results of experimental data obtained from the literature. The relative errors were found to be about 1.05% for air temperature and 8% for air humidity, indicating that the numerical model has a good capability of estimating the desiccant material performance. It was also found that the MRC, ϵDW and ϵth are about 22 g/s, 76% and 43% respectively.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:air dehumidifier system, moisture removal capacity (MRC)
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:88753
Deposited By: Narimah Nawil
Deposited On:29 Dec 2020 08:12
Last Modified:29 Dec 2020 08:12

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