TY - JOUR
T1 - Low Energy Direct Contact Membrane Desalination
T2 - 7th International Conference on Applied Energy, ICAE 2015
AU - Suwwan, Dana
AU - Hashaikeh, Raed
AU - Janajreh, Isam
N1 - Funding Information:
The authors are grateful for the financial support from MASDAR Institute of Science & Technology and to members of the Waste to Energy Laboratory for their support throughout this research.
Publisher Copyright:
© 2015 Published by Elsevier Ltd.
PY - 2015
Y1 - 2015
N2 - The steady state performance of Low Energy Direct Contact Membrane Distillation (DCMD) is numerically investigated. A case of uniform flow is considered entering both the feed side at a temperature above the permeate side. The developed fluid model is governed by the Navier-Stokes flow and energy equation in a coupled conjugate heat transfer formulation to the flow and the solid membrane. Across the membrane and depending on the membrane parameters including permeability, thickness, pore size and conductivity the local temperature difference creates a driving pressure gradient responsible of evaporation part of the feed adjacent to the membrane surface, transport it through the pores, and condense it at permeate side through the hydrophobic membrane. The membrane's coefficients of DCMD membrane is evaluated along with the mass flux, heat flux, temperature polarization factor, and thermal efficiency. In this paper, two flow configurations are studied: Counter and Parallel flow. A parametric study is conducted incorporating velocity combinations and concluding an optimum configuration in terms of DCMD efficiency, mass flux. In view of these plausible results, a sensitivity study to the flow rates is carried out to gain better insight to the temperature polarization, heat flux including convective, conductive and the associated latent heat as well as in understanding its effect on the process metrics and yield.
AB - The steady state performance of Low Energy Direct Contact Membrane Distillation (DCMD) is numerically investigated. A case of uniform flow is considered entering both the feed side at a temperature above the permeate side. The developed fluid model is governed by the Navier-Stokes flow and energy equation in a coupled conjugate heat transfer formulation to the flow and the solid membrane. Across the membrane and depending on the membrane parameters including permeability, thickness, pore size and conductivity the local temperature difference creates a driving pressure gradient responsible of evaporation part of the feed adjacent to the membrane surface, transport it through the pores, and condense it at permeate side through the hydrophobic membrane. The membrane's coefficients of DCMD membrane is evaluated along with the mass flux, heat flux, temperature polarization factor, and thermal efficiency. In this paper, two flow configurations are studied: Counter and Parallel flow. A parametric study is conducted incorporating velocity combinations and concluding an optimum configuration in terms of DCMD efficiency, mass flux. In view of these plausible results, a sensitivity study to the flow rates is carried out to gain better insight to the temperature polarization, heat flux including convective, conductive and the associated latent heat as well as in understanding its effect on the process metrics and yield.
KW - Hydrophobic
KW - Permeability
KW - Pore size
KW - Temperature Polarization
UR - http://www.scopus.com/inward/record.url?scp=84947093459&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2015.07.438
DO - 10.1016/j.egypro.2015.07.438
M3 - Conference article
AN - SCOPUS:84947093459
SN - 1876-6102
VL - 75
SP - 1722
EP - 1727
JO - Energy Procedia
JF - Energy Procedia
Y2 - 28 March 2015 through 31 March 2015
ER -