Performance Assessment of RO Desalination Plant at Different Salinities and Recovery Ratios

Giuma Fellah*
* Professor, Department of Mechanical and Industrial Engineering, Faculty of Engineering, University of Tripoli, Libya.
Periodicity:February - April'2019
DOI : https://doi.org/10.26634/jfet.14.3.15516

Abstract

Two parameters might affect the thermodynamic performance of Reverse Osmosis (RO) desalination plants, those are the recovery ratio and feed water salinity. Exergy analysis is performed to determine the effect of those parameters on the thermodynamic performance of a reverse osmosis desalination unit. Irreversibility, effectiveness, and specific energy consumption are obtained at different recovery ratios and salinities. The results of the developed thermodynamic model of the present work are validated against the obtained results from the literature, where the effectiveness and the contributions of the membrane, high-pressure valves, friction, and the other components to total irreversibility are compared. The results show that the contribution of the high valve and membranes to total irreversibility depends strongly on the recovery ratio. The contribution of other components to total irreversibility is a minor one. The effect of source salinity on the percentage of the recovered exergy is not substantial, for instance, it is found that 7.96% and 6.88% of the destroyed exergy can be recovered, at salinities of 1000 ppm and 5000 ppm, repectively. The analysis shows that using the Pelton wheel to recover part of the destroyed exergy is only reasonable at low and moderate recovery ratio. For instance, the input power decreases by 7% and 60% for recovery ratio of 0.9 and 0.1, respectively.

Keywords

Desalination; Salinity; recovery ratio; Reverse Osmosis; Exergy; Effectiveness.

How to Cite this Article?

Fellah,G. (2019). Performance Assessment of Ro Desalination Plant at Different Salinities and Recovery Ratios. i-manager’s Journal on Future Engineering and Technology,14 (3), 1-9. https://doi.org/10.26634/jfet.14.3.15516

References

[1]. Ahmed, B., & Zubair, S. (2015). Exergetic analysis of a brackish water reverse osmosis desalination unit with various energy recovery systems. Energy, 93, 256-265.
[2]. Ahmed, B., & Zubair, S. (2016). Energy-exergy analysis of seawater reverse osmosis plants. Desalination, 385, 138-147.
[3]. Aljundi, I. H. (2009). Second-law analysis of a reverse osmosis plant in Jordan. Desalination, 239(1-3), 207-215.
[4]. Banchik, L. (2012). In Thermodynamic Analysis of a Reverse Osmosis desalination system using forward osmosis for energy recovery. IMECE2012-86987 (pp. 1- 13).
[5]. Blanco-Marigorta, A., Lozano-Medina, A., & Marcos, J. (2017). The exergetic efficiency as a performance evaluation tool in Reverse Osmosis desalination plants in operation. Desalination, 413, 19-28.
[6]. Cerci, Y. (2002). Exergy analysis of a reverse osmosis desalination plant in California. Desalination, 142(3), 257- 266.
[7]. Cipollina, A., Micale, G., & Rizzuti, L. (2009). Green Energy and Technology, 1st Ed. Palermo: Sprigler.
[8]. El-Emam, R. S. & Dincer, I. (2014). Thermodynamic and thermoeconomic analyses of seawater reverse osmosis desalination plant with energy recovery. Energy, 64, 154-163.
[9]. Eshoul, N., Agnew, B., Anderson, A., & Atab, M. (2017). Exergetic and economic analysis of two-pass RO desalination proposed plant for domestic water and irrigation. Energy, 122, 319-328.
[10]. Karabelas, A., Koutsou, C., Kostoglou, M., & Sioutopoulos, D. (2017). Analysis of specific energy consumption in reverse osmosis desalination processes. Desalination, 431, 15-21.
[11]. Kim, Y. M., Kim, S. J., Kim, Y. S., Lee, S., Kim, I. S., & Kim, J. H. (2009). Overview of systems engineering approaches for a large-scale seawater desalination plant with a Reverse Osmosis network. Desalination, 238(1-3), 312-332.
[12]. Li, M. (2011). Reducing specific energy consumption in Reverse Osmosis (RO) water desalination: An analysis from first principles. Desalination, 276(1-3), 128-135.
[13]. Loutatidou, S., & Arafat, H. (2015). Technoeconomic analysis of MED and RO desalination powered by low-enthalpy geothermal energy. Desalination, 365, 277-292.
[14]. Orfi, J. & Salim, B. (2012). Thermodynamic Analysis of a Reverse Osmosis desalination unit with energy recovery system. In Procedia Engineering, 33, (2011), 404-414.
[15]. Ramon, G., Feinberg, B., Ramon, G., & Hoek, E. (2013). A Thermodynamic Analysis of Osmotic Energy Recovery at a Reverse Osmosis Desalination Osmosis Desalination Plant. Environmental Science & Technology, 47(6), 2982-2989.
[16]. Sadri, S., Ameri, M., & Khoshkhoo, R. (2017). Multiobjective optimization of MED -TVC-RO hybrid desalination system based on the irreversibility concept. Desalination, 402, 97-108.
[17]. Sharqawy, M., Zubair, S., & Lienhard, J. (2011). Second law analysis of Reverse Osmosis desalination plants: An alternative design using pressure retarded osmosis. Energy, 36 (11), 6617-6626.
[18]. Wark, K. (1994). Advanced Thermodynamics For Engineers. New York: McGraw Hill.

Purchase Instant Access

Single Article

North Americas,UK,
Middle East,Europe
India Rest of world
USD EUR INR USD-ROW
Pdf 35 35 200 20
Online 35 35 200 15
Pdf & Online 35 35 400 25

If you have access to this article please login to view the article or kindly login to purchase the article
Options for accessing this content:
  • If you would like institutional access to this content, please recommend the title to your librarian.
    Library Recommendation Form
  • If you already have i-manager's user account: Login above and proceed to purchase the article.
  • New Users: Please register, then proceed to purchase the article.