Experimental investigation of the performance of a reverse osmosis desalination unit under full- and part-load operation

Dimitriou, Evangelos; Mohamed, Essam Sh.; Kyriakarakos, George; Papadakis, G.

doi:10.1080/19443994.2014.933623

Cited by 27 publications

(14 citation statements)

References 11 publications

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“…The first goal of this agent was to cover the water consumption and the second was not let the water tank get empty. unit could operate in partial load and it was considered to be able to produce potable water only when it operated (P des ) above the 30% of the nominal power (P desnom ) [59]. The Desalination agent took account of the inputs and determined the operation point of the desalination unit (see Fig.…”

Section: Desalination Agentmentioning

confidence: 99%

A multi-agent decentralized energy management system based on distributed intelligence for the design and control of autonomous polygeneration microgrids

Karavas

Kyriakarakos

Arvanitis

et al. 2015

Energy Conversion and Management

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271

129

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Section: Desalination Agentmentioning

confidence: 99%

A multi-agent decentralized energy management system based on distributed intelligence for the design and control of autonomous polygeneration microgrids

Karavas

Kyriakarakos

Arvanitis

et al. 2015

Energy Conversion and Management

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271

129

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“…Therefore, it is considered a multivariate system [8]. Many researchers experimented with the performance of seawater desalination plants under different operating conditions [9,10].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of energy consumption and model identification of reverse osmosis desalination system fed by hybrid renewable energy source under different operating conditions

Hossam-Eldin

Abed

Youssef

et al. 2019

IEEJ Transactions Elec Engng

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In this article, the specific energy consumption (SEC) and water production cost (Cw) of a reverse osmosis (RO) desalination plant are investigated experimentally under different working conditions. The plant is fed by a hybrid renewable energy source. The frequency of the high‐pressure pump motor is changed from 35 to 50 Hz using a variable frequency drive. In addition, the feed water temperature and the reject control valve are controlled. This article investigates the effects of SEC, Cw, permeate salt concentration, and plant productivity. The results show that both SEC and Cw are reduced by increasing the frequency up to 45 Hz before rising thereafter. Also, SEC and Cw decrease with increasing feed temperature and reduced reject valve opening. As a result, the optimum values of SEC and Cw are found at 45 Hz and 40 °C with 25% valve opening, representing 4.5 kWh/m3 and 0.55 $/m3, respectively. Then, a model is proposed for the RO plant using the Matlab identification toolbox. The model is validated by comparing the simulation results with the experimental data. Based on the best fit ratio, the model presents good results for verification, which can be used for a process control design. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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“…Historically, SWRO desalination systems were designed and developed for steady power input (nominal load operation). However, various studies have shown that lower specific energy consumption can be reached when a SWRO desalination unit operates at variable load conditions (over a range of input pressure to the membranes) by keeping constant the energy recovery ratio [9]. A comparative analysis have been experimentally investigated between two SWRO desalination units equipped with different energy recovery devices (hydraulic one and a rotary piston pump) and the results showed that the specific energy consumption presented a reduction of about 16% for both desalination units when operated in variable load conditions [10].…”

Section: Research On Stand-alone Swro Desalination Plantsmentioning

confidence: 99%

Renewable Energy Driven Small-Scale Sea Water Reverse Osmosis Desalination Systems: A Survey

Karavas¹,

Papadakis²

2017

J Fundam Renewable Energy Appl

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EditorialIn recent years, water and energy constitute two of the most important concerns of the worldwide agenda. These resources comprise essential commodities for the preservation of life on Earth and the human survival. At the dawn of the 21st century, there are more than 2 billion people without access to fresh water [1]. Taking into consideration that 97% of the earth's water comes from the oceans, an attractive solution to the lack of potable water is seawater desalination [2]. The main desalination processes are the thermal and the membranes ones. The membrane processes, such as electrodialysis and primarily reverse osmosis (RO), have been implemented not only on desalination but generally on water treatment and now have more global acceptance than thermal processes [3]. RO is a process where the feed water enters a semi-permeable membrane under pressure, larger than the osmotic pressure, and the membrane produces fresh water and concentrate solution [4].Water separation processes such as desalination require energy to produce fresh water and the minimum theoretical energy for desalination is 1.06 kWh/m 3 [5]. However, desalination plants consume higher amounts of energy per unit volume of fresh water produced. The continuous increase of the fossil fuels prices and their environmental impact as compared to the advantages of renewable energy and corresponding renewable energy systems (RES), makes the combination of RES with desalination units a sustainable and economically viable solution [6]. There are numerous studies for desalination plants powered by renewable energy technologies such as RO desalination units using solar energy, wind energy and thermal energy. Most of them focus on the quantity of the water production from the desalination unit with the aim to minimize the specific energy consumption (kWh/m 3 ) and the total investment cost. Research on Stand-Alone SWRO Desalination PlantsIn the past two decades, various SWRO desalination systems were developed in many areas in the world such as islands and regions, which face significant shortage in drinking water supply. Most of them use energy recovery devices (such as pressure exchangers and turbine systems) in order to reduce the energy requirements of the RO plant since more than 90% of the input energy to a RO desalination system is wasted in the brine line. Excellent results have been attained with regard to the specific energy consumption when small-scale SWRO desalination units are combined with energy recovery devices [7]. Specifically, a small-scale SWRO desalination unit with energy recovery device can present more than 80% reduction in its energy consumption compared to a same conventional desalination system (without energy recovery device) [8]. Historically, SWRO desalination systems were designed and developed for steady power input (nominal load operation). However, various studies have shown that lower specific energy consumption can be reached when a SWRO desalination unit operates at variable load conditions (over a range of input...

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Experimental investigation of the performance of a reverse osmosis desalination unit under full- and part-load operation

Cited by 27 publications

References 11 publications

A multi-agent decentralized energy management system based on distributed intelligence for the design and control of autonomous polygeneration microgrids

A multi-agent decentralized energy management system based on distributed intelligence for the design and control of autonomous polygeneration microgrids

Experimental investigation of energy consumption and model identification of reverse osmosis desalination system fed by hybrid renewable energy source under different operating conditions

Renewable Energy Driven Small-Scale Sea Water Reverse Osmosis Desalination Systems: A Survey

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