Global ETD Search
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Showing 1 to 16 of 16 for “"Humidification-Dehumidification"”.
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Numerical balancing in a humidification dehumidification desalination system
… on the thermal and concentration balancing of a humidification dehumidification desalination system. The system operates similarly to the natural rain cycle. Seawater is heated, sprayed into an airstream to increase the air's humidity, then pure water is condensed out of the same stream in a …
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A global strategy for the deployment of humidification-dehumidification technology
The world is suffering from a severe shortage of potable water. This effect is most noticeable in third-world regions, specifically in rural Africa and Asia. In these regions, clean water exhaustion has resulted in a myriad of negative affects such as diarrhea, infant death syndrome, hepatitis, and …
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Second law analysis and optimization of humidification-dehumidification desalination cycles
Humidification-Dehumidification (HD) desalination is a thermal distillation method that has the potential to be driven using solar heating. It is a promising technology that can potentially bring safe drinking water to people of the developing world. Surprisingly, few systematic efforts have been …
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Solar-driven humidification dehumidification desalination for potable use in Haiti
… desalination technologies, such as solar-driven humidification dehumidification (HDH), are needed to help provide clean drinking water to people living in coastal areas. This thesis explores the question of whether the fills used in the humidifier of the HDH system, which allow for increased …
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Extraction based thermodynamic balancing for a humidification dehumidification desalination plant
Humidification dehumidification (HDH) desalination is a thermal driven desalination technology. One of the main issues with HDH desalination is the high energy consumption involved. The energy efficiency of thermal desalination systems is given by a non-dimensional number known as the gained output …
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Thermal design of humidification dehumidification systems for affordable and small-scale desalination
The humidification dehumidification (HDH) technology is a carrier-gas-based thermal desalination technique ideal for application in a small-scale system but, currently, has a high cost of water production (about 30 $/m³ of pure water produced). The present thesis describes fundamental contributions …
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Saturation curve analysis of humidification-dehumidification desalination systems and analysis of reversible ejector performance
The limitations upon the efficiency of humidification-dehumidification (HDH) desalination systems are investigated. Secondly, ejector technologies are analyzed as a means of powering desalination systems thermally. Thermal desalination systems offer advantages over membrane technologies in terms of …
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Design of a mobile community level water treatment system based on Humidification Dehumidification desalination
… dimensional, solid model of the technology. This Humidification Dehumidification (HDH) based technology aims to be applied at community level water supplies, bringing clean water to those countries with inadequate water infrastructure. The mobility provided by the model would allow the HDH based …
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Entropy generation minimization of a heat and mass exchanger for use in a humidification-dehumidification desalination system
… This process is particularly relevant in humidification-dehumidification desalination systems, where minimizing entropy generation per unit water produced is critical to maximizing system performance. Control volume techniques are first employed, and shown to be ill-suited to understanding …
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Numerical fixed-effectiveness and fixed-area models of the humidification dehumidification desalination system with air extractions and injections/
The humidification dehumidification (HDH) desalination system can be advantageous in small-scale, off-grid applications. This system is very robust and can tolerate a wide range of feed salinities, making it a good candidate for treating produced water from hydraulically fractured natural gas …
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High efficiency solar air heaters with novel built-in heat storage for use in a humidification-dehumidification desalination cycle
… products. However, in the context of a Humidification-Dehumidification (HD) Desalination cycle air heating offers significant performance gains for the cycle. Solar collectors can be over 40% of an air-heated HDH system's cost, thus design optimization is crucial. Best design practices …
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Modelling, Simulation and Optimisation of Multistage Humidification and Dehumidification Desalination Plant Using Solar Energy. Performance Evaluation and Improvement of the Humidification-Dehumidification Desalination Process through Modelling, Simulation and Optimisation Techniques
… For this reason, a new method known as Humidification-Dehumidification (HDH) desalination process has been developed to address the challenge of water shortage. The aim of this research was to build the detailed mechanistic models with the increased capability to predict more accurately …
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Design and optimization of a humidifier for an HDH system
… illness occur in the developing world. The humidification dehumidification desalination system currently being developed at the Lienhard Research Laboratory is a water treatment technology with low operational requirements that make it ideal for operation in the developing world. Researchers …
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Heat and mass transfer in bubble column dehumidifiers for HDH desalination
… design of bubble column dehumidifiers for humidification-dehumidification (HDH) systems. As a result of their high heat transfer coefficients and large interfacial areas, bubble columns are an inexpensive and compact solution for dehumidification in HDH, which has promising applications in …
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Development of a multi-stage bubble column dehumidifier for application in a hymidification dehumidification desalination system
… from the Lienhard Research Laboratory is the Humidification Dehumidification desalination system, or HDH. In many ways HDH resembles the natural rain cycle for producing fresh water, in that sea water is evaporated from oceans into humid air that travels up into the atmosphere, before …
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Design of an axial turbine and thermodynamic analysis and testing of a K03 turbocharger
A novel humidification dehumidification desalination system was developed at the Rohseneow Kendall Heat Transfer Laboratory. The HDH system runs by having different pressures in the humidifier and dehumidifier. One of the components that will keep the different pressures is an expander. The …