Open Access Open Access  Restricted Access Subscription or Fee Access

Exergy Analysis of a Plate Type Freshwater Generator Used in Marine Vessels


(*) Corresponding author


Authors' affiliations


DOI: https://doi.org/10.15866/ireme.v15i8.21332

Abstract


The freshwater generation from seawater in marine vessels is outlined. Freshwater is a requirement for human consumption as well as for the operation of onboard machinery. As per the World Health Organization (WHO) guidelines, dissolved solids in the drinking water should be less than 500 mg/litre. Technical water (used for the operation of onboard machinery) will contain less than 2.5 mg/litre of boiler feed water. The submerged plate-type evaporator is mainly used on merchant's vessels in order to produce freshwater. An exergy analysis for utilizing waste heat as a source for a single effect desalination process to meet the freshwater needs is proposed with due consideration to practical aspects. A plate-type freshwater generator installed at the Training Ship of Tolani Maritime Institute, Pune, India, is analyzed. Thermal properties are calculated using a "C" program. The practical approach to exergy analysis of the freshwater generating process is to calculate the total exergy loss, which is then compared with the partial exergy losses in the system in order to establish the impact of the specific process on the overall system efficiency. This exergy study calculates the proportion and the distribution of unavailable work in the evaporator, condenser, and brine section of a plate-type freshwater generator. The exergy efficiency in freshwater generators with plate-type freshwater generators is 64%. Since the exergy losses in the freshwater generator are disclosed, the task of effectively directing efforts in performance and energy conservations is simplified.
Copyright © 2021 Praise Worthy Prize - All rights reserved.

Keywords


Chemical Potential; Exergy Efficiency; Flow Exergy; Improvement Potential; Thermal Desalination

Full Text:

PDF


References


Ibrahim S., Al-Mutaz, Irfan Wazeer, Development of A Steady-State Mathematical Model for MEE-TVC Desalination Plant, Science Direct, Desalination, Vol. 351, 9-18, 2014.
https://doi.org/10.1016/j.desal.2014.07.018

Miller, F. J., Poisson, A., International one-atmosphere equation of state of seawater, Deep-Sea Research Part A. Oceanographic Research Papers, Volume 28, Issue 6, Pages 625-629, ISSN 0198-0149, 1981.
https://doi.org/10.1016/0198-0149(81)90122-9

Kahraman, N., Cengel, Y. A., Wood, B., Cerci, Y., Exergy analysis of a combined RO, NF, and EDR desalination plant, Desalination, 171(3), 217-232, 2005.
https://doi.org/10.1016/j.desal.2004.05.006

Kahraman, N., and Cengel, Y. A., Exergy Analysis of an MSF Distillation Plant, Energy Conversion and Management, Scinec@Direct, 46, 2625-2636, 2005.
https://doi.org/10.1016/j.enconman.2004.11.009

Safety A.S., Fath H.E.S., Mabrouk A., Exergy and Themoeconomic Evaluation of MSF Process Using a New Visual Package, Science Direct, Desalination, 201, 224-240, 2006.
https://doi.org/10.1016/j.desal.2005.09.043

Mostafa H. Sharqawy, M. H., Zubair, S. M., John H. Lienhard, J. H. V., Formulation of seawater flow exergy using accurate thermodynamic data, Proceedings of the IMECE 2010 ASME 2010 International Mechanical Engineering Congress and Exposition, November 12-18, Vancouver, British Columbia, Canda Paper No: IMECE2010-40915, 675-682, 2010.

Mostafa H. Sharqawy, M. H., Zubair, S. M., John H. Lienhard, J. H. V., Second law analysis of reverse osmosis desalination plants: An alternative design using pressure retarded osmosis, Journal of Energy, Elsevier 36, 6617-6626, 2011.
https://doi.org/10.1016/j.energy.2011.08.056

Mostafa H. Sharqawy, M. H., Zubair, S. M., John H. Lienhard, J. H. V., On Exergy Calculations of Seawater with Applications in Desalination Systems. International Journal of Thermal Sciences, 50, no.: 187-196, 2011.
https://doi.org/10.1016/j.ijthermalsci.2010.09.013

International Association for the Properties of Water and Stem, Release on the IAPWS formulation of the thermodynamic properties of seawater, 2008.

Hosseini, S. R., Amidpour, M., Behbahaninia, A., Thermoeconomic Analysis with Reliability Consideration of a Combined Power and Multi-Stage Flash Desalination Plan, Desalination, 278, 424-433, 2011.
https://doi.org/10.1016/j.desal.2011.05.061

Pinho, C., Sizing of a Domestic Hot Water Heating and Storage System for Short Operating Cycles - A Theoretical Approach, (2015) International Review of Mechanical Engineering (IREME), 9 (4), pp. 400-407.
https://doi.org/10.15866/ireme.v9i4.6671

Rawabawale, N., Sapali, S., MATLAB Simulation and Validation of Fluid Properties in the Cross Flow Wet Cooling Tower, (2017) International Review of Mechanical Engineering (IREME), 11 (2), pp. 114-120.
https://doi.org/10.15866/ireme.v11i2.10984

Gude, V. G., Exergy Evaluation of Desalination Processes, Chemical Engineering Journal MDPI, Chem Engineering, 2, 28; 2018.
https://doi.org/10.3390/chemengineering2020028

Choudhari, C. S. and Sapali, S.N., Testing of Environment-Friendly Refrigerant R290 for Water Cooler Application (RESEARCH NOTE), International Journal of Engineering, Volume 31, issue 1, 157-163, 2018.
https://doi.org/10.5829/ije.2018.31.01a.21

Shikalgar, N. D., and Sapali, S.N., Energy and exergy analysis of a domestic refrigerator: approaching a sustainable refrigerator, Journal of Thermal Engineering, Vol. 5, No. 5, pp. 469-481, Yildiz Technical University Press, Istanbul, Turkey, 2019.
https://doi.org/10.18186/thermal.624159

Shikalgar, N., Sapali, S., Numerical and Thermal Analysis of Condensers Applied to Domestic Refrigerator, (2017) International Review of Mechanical Engineering (IREME), 11 (7), pp. 481-485.
https://doi.org/10.15866/ireme.v11i7.12849

Rawabawale, N., and Sapali, S.N., exergy analysis of the cross current cooling tower, Journal of Thermal Engineering, Vol. 6, No. 4, pp. 499-510, Yildiz Technical University Press, Istanbul, Turkey, 2020.
https://doi.org/10.18186/thermal.764163

Al-Rawashdeh, H., Behiri, M., Mustafa, R., Hassan, A., Efficiency and Exergy Enhancement of ORC Powered by Recovering Flue Gases-Heat System in Cement Industrials: a Case Study, (2019) International Review of Mechanical Engineering (IREME), 13 (3), pp. 185-197.
https://doi.org/10.15866/ireme.v13i3.16713

Alshqirate, A., Essa, M., Abdel Aziz, E., Improved Pyramid Solar Still for Solar Water Desalination - A Case Study, (2020) International Review of Mechanical Engineering (IREME), 14 (12), pp. 743-749.
https://doi.org/10.15866/ireme.v14i12.20051

Sivakumar, M., Somasundaram, P., Thangavel, P., Exergy and Performance Analysis of Three Stage Auto Refrigerating Cascade (3 Stage ARC) System Using Zeotropic Mixture of Eco-Friendly Refrigerants, (2014) International Review of Mechanical Engineering (IREME), 8 (1), pp. 124-134.

Ahern, J. E., the exergy method of energy systems analysis John Wiley & Sons, ISBN 0-471-05494-1, 102-106, 1980.

Kotas, T. J., The Exergy Method Of Thermal Plant Analysis Exergon Publishing Company, UK London, ISBN 978-1-908341-89-1, 33-44, 2012.

Mustafa, I. and Ghamdi, A. I., Exergy Analysis of Thermal Seawater Desalination - A case Study, Chapter 13, Renewable Energy Powered Desalination Handbook, 2018.
https://doi.org/10.1016/B978-0-12-815244-7.00013-1

Hammond, G.P., Engineering Sustainability: Thermodynamics, Energy Systems, and the Environment. In: Winnett A. (eds) Towards an Environment Research Agenda. Palgrave Macmillan, London.

Kam, W., Li, Applied Thermodynamics: Availability Method And Energy Conversion Taylor & Francis, New York, ISBN: 1-56032-349-3, ISSN: 1040-2756, 1989.

Paloboran, M., Darmawang, D., Mandra, M., Parenrengi, S., Performance Investigation of Steam Boiler of PLTU Tello Makassar Using Energy - Exergy and Entropy Balance Approach, (2020) International Review of Electrical Engineering (IREE), 15 (5), pp. 431-442.
https://doi.org/10.15866/iree.v15i5.17956

Romero Garcia, G., Florez Solano, E., Cardenas, J., Experimental and CFD Characterization of the Jacket Vessel Heat Transfer Process, (2020) International Review on Modelling and Simulations (IREMOS), 13 (5), pp. 329-336.
https://doi.org/10.15866/iremos.v13i5.18882

Cardenas, J., Valencia, G., Duarte Forero, J., Comparative Analysis of Supercritical CO2 Brayton Cycles with Simple and Partial Cooling Configurations, (2020) International Journal on Energy Conversion (IRECON), 8 (5), pp. 153-161.
https://doi.org/10.15866/irecon.v8i5.19105

Espinel, E., Romero, G., Rojas, J., Energy and Exergy Analysis of a Lithium Bromide - Water (LiBr - H2O) Solar Absorption Refrigeration System, (2021) International Review on Modelling and Simulations (IREMOS), 14 (4), pp. 251-260.
https://doi.org/10.15866/iremos.v14i4.18890

Anmmar, A., Ahmed, A., Ali, O., Analysis of Exergy and Energy Variation of Gas Turbine Power Plant in Taza-Iraq, (2021) International Journal on Energy Conversion (IRECON), 9 (2), pp. 35-40.
https://doi.org/10.15866/irecon.v9i2.19283


Refbacks

  • There are currently no refbacks.


Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize