New dynamic library of reverse osmosis plants with fault simulation

Palacin, Luis; Tadeo, Fernando; Elfil, Hamza; Prada, César de; Salazar, Johanna

doi:10.5004/dwt.2011.1434

Cited by 11 publications

(6 citation statements)

References 18 publications

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“…For this, EcosimPro© was selected as simulation language, as it is a powerful modelling and simulation tool oriented towards multidomain simulations: the object oriented and non causal approach allows new simulations to be created using components from different libraries. In fact, components have already been developed and are extensively used in areas like Chemical Engineering (Garcia et al, 2002;Palacin et al, 2011), Life Support Systems (Pérez-Vara et al, 2003;Ordónez et al, 2004), Nuclear Plants (Argüello- Tara et al, 2003), Space Support Systems (Moral et al, 2010), etc . Then our aim here is to add to the set of existing libraries a Microgrid library that can be connected to existing components to evaluate the effects of the Microgrid on the loads.…”

Section: Fig 1 Example Of Microgrid With Mixed Renewable Energy Soumentioning

confidence: 99%

A Microgrid Library in a General Simulation Language

Salazar

Tadeo

Prada

2014

IFAC Proceedings Volumes

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Section: Fig 1 Example Of Microgrid With Mixed Renewable Energy Soumentioning

confidence: 99%

A Microgrid Library in a General Simulation Language

Salazar

Tadeo

Prada

2014

IFAC Proceedings Volumes

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“…The cleaning regimen is assumed to be based on flushing membrane modules by recirculating the cleaning solution at high speed through the module. The water permeability and salt permeability constants are assumed to depend on temperature and fouling, with membrane fouling modeled as an exponential decay of the water permeability over time, with incomplete recovery [12], [13], [14]: …”

Section: Modelling Of Membrane Foulingmentioning

confidence: 99%

Planning of the Operating Points in Desalination Plants based on Energy Optimization

Zarai¹,

Tadeo²,

Chaabene³

2013

IJCA

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A methodology is developed for the optimization of the operation of Reverse Osmosis (RO) desalination process. Thus, a computer model of the process is first presented, that comprises two sub models, the first for the solution diffusion process, and the second for the effects of membrane fouling. The optimal operation problem is then stated and transformed into a mathematical optimization problem, based on the minimization of the Specific Energy Consumption (SEC): a computer-based approach is then proposed, to periodically calculate a combination of the pressure difference across the membrane, and the feed water flow rates, that minimizes the SEC, and always fulfils given operational constraints. It is shown that this mathematical problem can be transformed into a standard nonlinear optimization problem, which can be solved using off-the-self software. Application of the methodology is demonstrated on the simulation of a real RO desalination plant, which demonstrates how the proposed approach makes possible to adapt the operation to variations in the plant conditions.

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“…The mathematical modelling, which is in the core of the components of the library, was presented in Syafiie et al (2008aSyafiie et al ( ,b, 2009Syafiie et al ( , 2010 and Palacín et al (2012a,b); while the library was presented in Palacín et al (2008a), and upgraded in Palacín et al (2009cPalacín et al ( , 2011b. Finally, the validation of the library was described in Palacín et al (2010b,e).…”

Section: Resultsmentioning

confidence: 99%

“…that can be used for the design of the control and supervision systems. This library was presented in Palacín et al (2008a), and upgraded in Palacín et al (2009cPalacín et al ( , 2011b. Figure 2.17 shows a view of the graphical interface of EcosimPro and the ROSIM library.…”

Section: The Rosim Librarymentioning

confidence: 99%

“…La librería ha sido presentada en Palacín et al (2008aPalacín et al ( , 2009cPalacín et al ( , 2011b, mientras que su validación ha sido descrita en Palacín et al (2010b,e). El modelado matemático, que se encuentra por debajo de cada uno de los componentes de la librería, está descrito en Syafiie et al (2008aSyafiie et al ( ,b, 2009Syafiie et al ( , 2010 y Palacín et al (2012aPalacín et al ( ,b).…”

Section: A4 Organización De La Tesisunclassified

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Modelling, simulation and advanced control of small-scale reverse osmosis desalination plants

Palacin¹

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Over the last few decades, desalination has become an effective technique to produce drinkable water, from sea and brackish water, in regions where the fresh water availability is insufficient to fulfil the water demand. From the nineties onwards, Reverse Osmosis (RO) has become the most popular technology for desalination. This is because the RO desalination plants require less energy, investment cost and maintenance than other alternative desalination processes. Around 50% of the plants operating, and most plants under construction, are based on RO technology.This thesis is focused on the modelling, simulation and advanced control of one particular type of RO desalination plants: small-scale plants situated in remote areas. Typically, these plants are powered by renewable energies (such as solar panels and wind turbines) and provide drinkable water for small villages and settlements. They are very popular in arid or semi arid regions, where there is an important availability of solar radiation and wind, such as the Maghreb and the South of Europe. The correct operation of these plants fulfils the water demand and optimizes the use of the renewable energy. Besides, the advanced control deals with other issues, such as the minimization of the consumption of chemicals, the minimization of the volume of stored water, the scheduling of the stops and cleaning of the plant, the design of fault detection tools, etc.The first part of this thesis deals with the modelling of RO desalination plants. In line with this thesis, a dynamic simulation library was developed for RO desalination plants. This library is based on first principles, physical and chemical equations and correlations from the literature. It can be used for different purposes, such as the comparison of control strategies, optimization of variables, testing, capacity design, parameter estimation, data reconciliation, etc. Some of the vi SUMMARY components of the library were validated using an RO pilot plant.The second part of this thesis deals with the advanced control of RO desalination plants, powered by renewable energy. The advanced control was done using the developed simulation library, and it covers several issues, such as the model-based predictive control, the integration of process design and control, the economic optimization of the energy consumption and the cleaning scheduling, etc.The third and last part of this thesis deals with the multi-scale modelling of the RO membranes, which are the core of the RO desalination plants. In particular, the dynamic development of the salt gradient, which takes place in the boundary layer close to the membrane surface, was modelled. This modelling approach presents several improvements over other modelling strategies.

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New dynamic library of reverse osmosis plants with fault simulation

Cited by 11 publications

References 18 publications

A Microgrid Library in a General Simulation Language

A Microgrid Library in a General Simulation Language

Planning of the Operating Points in Desalination Plants based on Energy Optimization

Modelling, simulation and advanced control of small-scale reverse osmosis desalination plants

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