Energy optimization in parallel/cross feed multiple-effect evaporator based desalination system

Sharan, Prashant; Bandyopadhyay, Santanu

doi:10.1016/j.energy.2016.05.107

Cited by 28 publications

(4 citation statements)

References 31 publications

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“…Parallel/cross flow scheme is known to be more energy‐efficient compared with forward flow. [ 44 ] The energy conservation of MED has also been made through methods such as feed preheating, vapor bleeding, brine, and condensate flashing. [ 45 ]…”

Section: Strategies For Energy Reduction In Desalination Processesmentioning

confidence: 99%

Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

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With the change in climate patterns, rapid industrialization, and population growth, the increasing water and energy demand became a major concern in the past decades. Desalination has been touted as the answer to the global water crisis, due to its capability in producing high‐quality fresh water from saline water. The continual research and innovations in the desalination field have resulted in the commercialization of large‐scale desalination in many water scarce regions. In the energetic context, all desalination processes are energy intensive. With the necessity to make desalination a more affordable and sustainable process, the energy efficiency of desalination is becoming an important topic. Herein, it is aimed to provide insights into the recent efforts and strategies established to tackle the energy‐related issues of both, thermal‐based and membrane‐based desalination processes. Depending on the principle of various commercial and emerging desalination processes, the directions of energy efficiency improvements, which include operating condition optimization, high‐performance material development, and renewable energy exploitation are discussed. The ideas and strategies reviewed herein, whether in their implementation or theoretical stage, are expected to provide insights into the possible improvement for application in commercial desalination plants.

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Section: Strategies For Energy Reduction In Desalination Processesmentioning

confidence: 99%

Energy Efficient Seawater Desalination: Strategies and Opportunities

2021

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“…The design of cascaded desalination systems have been previously attempted using rigorous mathematical tools. − Other types of problems that involve the use of mathematical tools for the design of desalination systems have also been attempted. For instance, Sharan and Bandyopadhyay developed a methodology for multi-effect evaporators (MEE) that is based on the principle of process integration combined with mathematical optimization to determine the optimal feed flow rates into each effect.…”

Section: Introductionmentioning

confidence: 99%

Cascaded Design of Desalination Systems: A Graphical Approach

Alnouri

2021

Ind. Eng. Chem. Res.

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A graphical technique to design staged desalination systems is introduced in this work by utilizing the concept of composite curves. Material recycle networks (MRNs), which are very popular graphical tools, also rely on the use of composite curves. MRNs involve sources and sinks that are independent and, hence, require two separate curves. The use of composite curves for designing cascaded desalination systems is very different, since it has to be handled as a "composite loop", due to the interdependence between the streams involved. A standard desalination stage behaves as one process sink (the feedwater stream), which in turn is automatically associated with two different process sources (the potable water stream and the brine stream). In a cascaded design, a sink may then become a source, as more stages are added. The use of the terms "source" and "sink" in this work is merely to indicate that a stream is flowing in or out of a stage. Various factors that affect the design and performance of desalination systems, such as water recovery and salt rejection, must be carefully considered when plotting a composite loop. The ability to visualize all those aspects using graphical tools provides great advantages for cascaded desalination systems. Moreover, identifying the point at which adding an extra stage no longer enhances system performance, in terms of permeate and/or brine quality, can be easily identified.

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“…In this publication, azeotropic distillation, single-effect evaporation, co-current multiple-effect evaporation and counter-current multiple-effect evaporation were compared as possible processes for the recovery of diluted sulfuric acid. However, numbers of simulation based description of evaporation systems has been published recently [13][14][15][16], only one work included sulfuric acid recovery [17]. This further emphasizes the urgent need for improvements in modelling of spent acid regeneration via separation technologies.…”

Section: Introductionmentioning

confidence: 99%

Prospective Evaluation of Spent Sulfuric Acid Recovery by Process Simulation

Várnai¹,

Petri²,

Nagy³

2020

Period. Polytech. Chem. Eng.

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This study presents the steady-state simulation and optimization with regard to the recovery of spent sulfuric acid. Our purpose was to prove the utility of process simulation in terms of designing with special materials using energy-efficient methods. Process simulation is used in order to compare technological variants, analyze technological problems that occur as well as optimize the process. In this investigation three concentration processes are compared: azeotropic distillation and multiple-effect evaporation both in co-current and counter-current modes. The main aspects of the comparison are energy consumption and heat efficiency. Process simulation is an adequate tool for analyzing the thermal decomposition of sulfuric acid, the presence of sulfuric acid in the vapor fraction, and the costs of applying a third agent. Here, three models and a simulation-based prospective evaluation of energy consumption and the economy are presented. It is shown that the process of azeotropic distillation consumes an extremely large amount of thermal energy which seems to be more than that consumed by single-effect evaporation, while triple-effect evaporation in the counter-current mode was found to be the most thermally efficacious.

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Energy optimization in parallel/cross feed multiple-effect evaporator based desalination system

Cited by 28 publications

References 31 publications

Energy Efficient Seawater Desalination: Strategies and Opportunities

Energy Efficient Seawater Desalination: Strategies and Opportunities

Cascaded Design of Desalination Systems: A Graphical Approach

Prospective Evaluation of Spent Sulfuric Acid Recovery by Process Simulation

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