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S. Kumaraswamy

Other affiliations: Indian Institutes of Technology
Bio: S. Kumaraswamy is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Impeller & Low-temperature thermal desalination. The author has an hindex of 5, co-authored 15 publications receiving 139 citations. Previous affiliations of S. Kumaraswamy include Indian Institutes of Technology.

Papers
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Journal ArticleDOI
TL;DR: A two-phase variable geometry jet pump was designed, developed and tested for the flash desalination system to create a vacuum inside the flash chamber, and the area ratio of the jet pump used for the investigation was 0.25 as discussed by the authors.

42 citations

Journal ArticleDOI
TL;DR: In this paper, experimental investigations concerning cavitation in radial flow pump for three different leading edge profiles of the vane were carried out in an open circuit system and the results revealed that the noise and vibration were better predictors of inception and development of cavitation.
Abstract: Experimental investigations concerning cavitation in radial flow pump for three different leading edge profiles of the vane were carried out in an open circuit system. The operating condition of the radial flow pump under cavitating case was understood by measurement of noise and vibration along with the pump parameters for various speeds and flow rates. The outcome of the experimental results revealed that the noise and vibration were better predictors of inception and development of cavitation. Further observation inferred from critical net positive suction head (NPSH) curve of 3% head drop and critical NPSH value of noise and vibration are presented.

37 citations

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TL;DR: In this article, an analysis of a vacuum desalination system is presented by applying the mass, momentum and energy balances across the various components, the governing equations are obtained for the analysis.

34 citations

Journal ArticleDOI
TL;DR: In this paper, a desalination system was designed for converting brackish water into potable water utilizing ocean thermal gradient using flash and surface evaporation and subsequently the vapour is condensed to get potable waters.

21 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, the authors discuss the importance of water resources in modern societies and the challenges facing modern societies, while water covers about two thirds of the surface of the earth, while air covers less than one third of it.

397 citations

Journal ArticleDOI
TL;DR: In this article, the main concerns of the need to optimise energy processes, especially by creating more energy-efficient and economically effective solutions, energy storage, energy recovery and the expansion of off-grid systems are discussed and their advantages and disadvantages are assessed.

125 citations

Journal ArticleDOI
TL;DR: In this article, the potential of ocean energy for seawater desalination in terms of diverse energy forms, flexible integration methods, and various deployment strategies is explored, and the authors discuss relevant cost, environmental and social concerns.
Abstract: Seawater desalination is an important option for addressing the world's water supply challenges. Current desalination plants use enormous quantities of energy and cause a number of environmental issues. Renewable energy options, mostly solar and geothermal systems, have been examined in detail to supply the energy needed for water desalination. The co-location benefit of energy derived from the ocean to power seawater desalination processes is appealing. However, the promise and potential of ocean-based power generation for desalination systems has not been investigated in detail. The development of such systems has been limited due to technological and economic limitations of energy harvesting and transport as well as device maintenance under water. In this paper, we review the state of the art of ocean energy in desalination. It explores different sources of energy from the ocean that include electricity generation, as well as mechanical force and thermal energy and salinity gradients that can also be directly harnessed for powering the desalination processes. We also examine recent advances in scaling up for commercial deployment, and discuss relevant cost, environmental and social concerns. The great potential of ocean energy for seawater desalination in terms of diverse energy forms, flexible integration methods and various deployment strategies can provide important environmental, water and social benefits for seawater desalination, thus promote sustainability in water-energy nexus. The use of ocean energy in desalination applications could benefit the future development of ocean energy technology in renewable energy sector.

106 citations

Journal ArticleDOI
TL;DR: In this article, an extensive review of the optimisation of the RES-RO desalination system is presented based on optimal system sizing, optimal system operation and optimal thermodynamic analysis.
Abstract: Reverse osmosis (RO) desalination has become a prominent desalination method for fresh-water production from either saline seawater or brackish water to meet the ever-growing demand for water, especially in water-scarce regions. Its integration with renewable energy sources (RES) reduces the environmental impact of carbon emission by conventional fossil fuel energy sources. The optimisation of the RES-RO desalination system is intended mainly to minimise total system cost and energy requirements and to guarantee system reliability. In this study, an extensive review of the optimisation of the RES-RO desalination system is presented based on optimal system sizing, optimal system operation and optimal thermodynamic analysis. RES such as geothermal, ocean, wind and solar energy and their hybrids were considered alongside desalination methods. Important findings of the review were discussed, and recommendations made for future work. Key recommendations of this study include the suggestion that extensive optimisation and analysis of a RES-RO system should utilise optimisation approaches that combine the sizing, operation and thermodynamic effect of the system. Future work should furthermore incorporate both economic and reliability indices in the formation of objective functions. Finally, demand response programmes can be introduced to the RES-RO system for demand side management. This has the potential of minimising system cost while maximising fresh-water production.

85 citations

Journal ArticleDOI
TL;DR: In this article, the characteristics of SJP are studied both experimentally and numerically to pump water using saturated steam, and the experimental and CFD results, of axial static pressure and temperature, match closely with each other.

77 citations