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In this paper a thermodynamic optimization of flat plate solar collector is developed to determine the optimal performance. In fact the energetic and exergetic analyzes are achieved by the determination of tow efficiencies. The influence of some geometrical parameters on the performance is also studied. It is noted that the exergetic efficiency of the collector has an optimum and that the energetic...
In this work, the droplet behaviour in a micro-channel of a proton exchange membrane fuel cell was simulated. The lattice Boltzmann method (LBM) was used to keep track of the deformation of the liquid-gas interface. A three-dimensional case was considered and a D3Q19 scheme was utilized to simulate a two phase droplet in a in a hydrophobic channel. The Shan-Chen model was employed in this study because...
Solar thermal energy is a promising source of energy, especially for high intensive solar irradiation locations such as Saudi Arabia. Solar tower is considered the most promising concentrating solar power technologies in the future. On the other hand, supercritical carbon dioxide (sCO2) Brayton cycles have recently received attention by the researchers in the field due to the high thermal efficiency...
Binding reaction is a natural characteristic that is applied to design biosensors. In this study we simulate the binding reaction kinetics between the immobilized antibody and the targeted antigen in a reaction chamber (microchannel) of a biosensor under AC applied electric field. The diffusion boundary layer on the sensitive area of the biosensor would hinder the binding reaction from association...
This paper is concerned with the energy and exergy analyses of flat plate solar collectors in transient behavior. Using the first law of thermodynamics, energy analysis was carried to estimate the amounts of energy gained from solar water collectors and the ratios of energy utilization. However, exergy analysis was accomplished to determine the location, type, and magnitude of exergy losses during...
The use of solar energy is promoted for water pumping and desalination especially in remote areas. For a reverse osmosis desalination plant, an increase in brackish water temperature allows an improvement in the recovery ratio, a saving in the required electrical energy, and a reduction in salt rejection. In this paper a conception of a reverse osmosis standalone desalination plant powered by Photovoltaic...
The paper reports a numerical investigation of the entropy generation analysis due to mixed convection in laminar flow through a channel filled with porous media. The second law of thermodynamics is applied to investigate the entropy generation rate. The Darcy-Brinkman model is employed. The entropy generation due to heat transfer and friction dissipations has been determined in mixed convection by...
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