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Jalihal, Purnima
- Emerging Technologies for Sustainable Desalination Handbook
Abstract Views :208 |
PDF Views:74
Authors
Affiliations
1 National Institute of Ocean Technology, Narayanapuram, Pallikaranai, Chennai 600 100, IN
1 National Institute of Ocean Technology, Narayanapuram, Pallikaranai, Chennai 600 100, IN
Source
Current Science, Vol 117, No 11 (2019), Pagination: 1898-1899Abstract
The book under review attempts to address the important topic of new and emerging technologies for sustainable desalination. The water stress around the world with reasons like huge population growth, climate change and improper water management has led to the idea of augmenting water using desalination. Today several technologies have become proven and some are at proof of concept stage. Thermal systems like multi stage flash (MSF), multi effect distillation (MED) are well known and membrane systems like reverse osmosis (RO) are being used. These systems have known advantages and disadvantages and energy requirement continues to be an area of concern. However it is imperative to keep trying out new technologies because desalination is dependent on various factors like whether steam is available, whether water is brackish or seawater. The other concerns should be the operation and maintenance and sustainable utilization of the by products. Some of these issues are supposedly addressed in some of the chapters.Full Text
- Studies on Nonlinear Behaviour of Floating Components for Offshore Desalination Plants
Abstract Views :249 |
PDF Views:81
Authors
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1694-1701Abstract
The article discusses the design considerations for components which exhibit nonlinear phenomenon for an offshore floating platform housing energy and desalination plants. It gives an account of specific cases where such analyses were carried out. National Institute of Ocean Technology, MoES has been working in the area of developing large capacity offshore-based desalination plant. Various platform configurations were studied for housing the plant components. First case study deals with the numerical investigation of an inter-connection system between two floating platforms, semi-submersible and spar platform. Second case describes the methodologies for studying the effects of crucial vortex-induced vibration for estimating the fatigue life of the long-sea-conduit independently and when bundled.Keywords
Cold Water Pipe, Inter-Connection, Vortex-Induced Vibration.Full Text
References
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- Performance Evaluation of Power Module during Demonstration of Wave-Powered Navigational Buoy
Abstract Views :246 |
PDF Views:86
Authors
Biren Pattanaik
1,
Ashwani Vishwanath
1,
Purnima Jalihal
1,
Y. V. N. Rao
1,
A. Karthikeyan
1,
K. S. Sajeev
1,
V. P. Shipin
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1712-1717Abstract
The article discusses performance of a power module in a wave-powered navigational buoy developed by National Institute of Ocean Technology. The power module of the buoy consists of an impulse turbine and a generator. Both unidirectional and bidirectional impulse turbine were tested for their performance. The article describes the selection, performance assessment tests and experimentation on these power modules carried out in the laboratory and in open sea trials. It was observed that unidirectional impulse turbine gave better performance than bidirectional impulse turbine for a given range of flow coefficient and pressure drop across the turbine. The performance of the wave powered navigational buoy in the open sea trials has given confidence on its use as a product and has also led to knowledge enhancement for scaling up floating wave energy devices.Keywords
Impulse Turbine, Open Sea Trial, Wave-Energy, Wave-Powered Navigational Buoy.Full Text
References
- Pattanaik, B., Nagasamy, D., Karthikeyan, A., Leo, D., Rao, Y. V. N., Sajeev, K. S., Dudhgaonkar, P. V. and Jalihal, P., Open sea trials on floating wave energy device backward bent ducted buoy and its performance optimization. In Proceedings of the Fourth International Conference in Ocean Engineering (ICOE2018), Lecture Notes in Civil Engineering, Springer, Singapore, 2019, vol. 23, pp. 775–791.
- Pattanaik, B., Rao, Y. V. N, Leo, D. and Jalihal, P., Experiential studies on development of power take off system for wave powered navigational buoy. In Proceedings of the 13th International Conference on Industrial and Information Systems (ICIIS 2018), IIT Ropar, 1–2 December 2018.
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- George, A., Anandanarayanan, R. and Suchithra, R., Experimental analysis of turbine-chamber coupling for wave energy conversion. Int. J. Energy Res., 2018, 42, 4770–4782.
- Vishwanath, A., Awasthi, N., Jalihal, P. and Dudhgaonkar, P., Performance simulation of wave-powered navigational buoy using CFD and experimental study. In Proceedings of the 4th International Conference in Ocean Engineering (ICOE2018), Lecture Notes in Civil Engineering, Springer, Singapore, 2019, vol. 23, pp. 869–882.
- Influence of Non-Condensable Gases on Performance of the Low Temperature Thermal Desalination Plants
Abstract Views :269 |
PDF Views:83
Authors
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1718-1724Abstract
This article addresses the effect of non-condensable (NC) gases on the thermal performance of condensers used in Low Temperature Thermal Desalination (LTTD) plants utilizing natural ocean temperature gradient as well as waste heat recovery from process plants. The NC gases that flow along with the water vapour cause local reduction of heat transfer in the condenser and leading to high operating power and cost escalation. A computational investigation was performed and results showed that with increase in NC gases concentration, there was a decrement in overall heat transfer coefficient, increment in uncondensed water vapour and thus reduction in yield.Keywords
Condenser, Desalination, Low Temperature Thermal Desalination, Non-condensable Gases.Full Text
References
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- Kathiroli, S., Purnima, J. and Phanikumar, V. S. S., Barge mounted low temperature thermal desalination plant. In The Eighteenth International Offshore and Polar Engineering Conference, International Society of Offshore and Polar Engineers, 2008.
- Venkatesan, R., Comparison between LTTD and RO process of sea-water desalination: an integrated economic, environmental and ecological framework. Curr. Sci., 2014, 106(3), 378–386.
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