Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"DCMD"”.
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Theoretical and experimental investigation of membrane distillation
… (AGMD), direct contact membrane distillation (DCMD), sweep gas membrane distillation (SGMD), and vacuum membrane distillation (VMD). DCMD and vacuum enhanced DCMD (VEDCMD), a variant of DCMD, were employed in this research. The objective of this study is to develop design tools for scale up of …
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Modeling Sensible Heat Driven Direct Contact Membrane Distillation Treatment of Oilfield Produced Water
… of direct contact membrane distillation (DCMD) to evaluate the feasibility of using sensible heat to drive DCMD treatment of oilfield produced water. Algorithms for performance prediction of instantaneous and counter-current DCMD flow were developed. These algorithms used equation-based …
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CFD simulation of polarization phenomena in direct contact membrane distillation systems
Direct contact membrane distillation (DCMD) is a thermal process in which warm feed and cool distilled water flow on opposite sides of a hydrophobic membrane. The temperature difference causes water to evaporate from the feed, travel through the membrane, and condense in the distillate. Because …
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Investigations on Solar Powered Direct Contact Membrane Distillation
… analyze a Direct Contact Membrane Distillation (DCMD) system from the view point of yield and exergy. The insights from exergy analysis are used in a design study, which is used for performance optimization. The first part concludes with a design procedure and design windows for large scale DCMD …
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Modulation of Axonal Transmission by Metabolic Stress
… the descending contralateral movement detector (DCMD) of the locust visual system is capable of modulating high-frequency performance after an anoxic coma to conserve energy. We investigated how other metabolic stresses could modulate the DCMD axon’s performance and what channels are involved in …
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Investigation of Membrane Fouling and Cleaning in Direct Contact Membrane Distillation of Municipal Wastewater
… for direct contact membrane distillation (DCMD) to help assist wastewater reuse become a reality. A laboratory scale DCMD system was designed and constructed including a warm feed loop and cold permeate loop to utilize a flat sheet, crossflow membrane cell. Treated wastewater effluent …
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Membrane distillation in dairy processing
… experimental investigation of direct contact MD (DCMD) for major dairy processes. Milk and whey were the two major dairy streams explored in this study.
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Anoxia-Induced Changes in Action Potential Propagation in a Non-Myelinated Axon
… Descending Contralateral Movement Detector (DCMD) neuron to study how the propagation characteristics of action potentials (APs) change following an acute energy stress in control and heat shock (HS) pre-treated animals. We also attempted to determine if Ca2+ is involved in the DCMD AP and …
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A solar‐driven membrane‐based water desalination/purification system
… tubes, and direct contact membrane distillation (DCMD) modules. A theoretical study was considered to firstly investigate the performance and feasibility of the proposed system and secondly to obtain the optimum physical and operational characteristics of both solar and desalination systems. The …
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Instigating buoyancy driven convection to improve membrane distillation performance
… in a direct contact membrane distillation (DCMD) system. For that purpose, we develop several actively heated prototypes and perform a series of experiments to explore how active heating affects distillate production. The prototypes are tested in multiple orientations to determine if …
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Collision avoidance behaviour in a pair of flying locusts (Locusta migratoria L.)
… the descending contralateral movement detector (DCMD). Previous studies have suggested that the LGMD/DCMD pathway allows each locust within a dense swarm to remain sensitive to approaches of individual objects including conspecifics and flying predators, approaching frequently from many …
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Unified framework to design efficient membrane distillation for brine concentration
… limit of permeate gap MD performance. CGMD and DCMD can also be resilient to high feed salinity by using a thicker membrane. A framework is proposed for choosing the cost-optimal membrane thickness along with optimal membrane size, as a function of the relative cost of membrane area compared to …
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Chemistry of Nanoscale Solids and Organic Matter in Sustainable Water Management Systems
… PMD. In a direct contact membrane distillation (DCMD) system under 0.75 kW/m2 solar irradiation, the membrane showed a high solar energy conversion efficiency (45%) and a high water flux (0.49 kg/m2塨) This performance was facilitated by the PDA coating, whose broad light absorption and …