Exergy costs analysis of water desalination and purification techniques by transfer functions

Carrasquer, Beatriz; Martínez-Gracia, Amaya; Uche, Javier

doi:10.1016/j.enconman.2016.07.065

Cited by 10 publications

(2 citation statements)

References 46 publications

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“…In order to apply exergy analysis, plant structure has been simplified and relevant where are generated, in this way the analysis is not guided to the cost analysis of some residues that specifically provoke desalination facilities, that could be accounted for in other studies [60].…”

Section: Exergy Analysismentioning

confidence: 99%

Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply

Usón

Uche

Martínez

et al. 2019

Energy

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Exergy and exergy cost analyses are proposed as complementary methods for the assessment and better understanding of the efficiency of a hybrid trigeneration system based on renewable energy sources. The system combines photovoltaic/thermal collectors, an evacuated tube collector and a wind turbine and produces electricity, sanitary hot water and desalted fresh water for a single family house. The system includes two desalination technologies (reverse osmosis and membrane distillation) that consume power and heat respectively, and two kinds of energy storage devices (a hot water tank and two lead-acid batteries). The assessment is based on simulations developed by using TRNSYS software. As a first level of detail, exergy analysis is applied in ten-minute basis to selected plant components. As a second level of detail, it is proposed to apply exergy-based indicators that summarize the system behavior during a longer period of time (monthly basis). By using aggregated values, exergy accumulation terms become negligible, what allows applying symbolic thermoeconomics to calculate exergy cost

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Section: Exergy Analysismentioning

confidence: 99%

Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply

Usón

Uche

Martínez

et al. 2019

Energy

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“…Actual desalination process energy costs are 5-10 times higher than the ideal process energy costs, indicating a second law efficiency of under 20%. This also means that desalination plant performance, especially, MSF and RO plants, can be improved significantly [24,26,27]. The key to improving the process performance is by diagnosing the process components using second law analysis.…”

Section: Why Exergy Analysis In Desalination Processesmentioning

confidence: 99%

Exergy Evaluation of Desalination Processes

Gude

2018

ChemEngineering

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Desalination of sea or brackish water sources to provide clean water supplies has now become a feasible option around the world. Escalating global populations have caused the surge of desalination applications. Desalination processes are energy intensive which results in a significant energy portfolio and associated environmental pollution for many communities. Both electrical and heat energy required for desalination processes have been reduced significantly over the recent years. However, the energy demands are still high and are expected to grow sharply with increasing population. Desalination technologies utilize various forms of energy to produce freshwater. While the process efficiency can be reported by the first law of thermodynamic analysis, this is not a true measure of the process performance as it does not account for all losses of energy. Accordingly, the second law of thermodynamics has been more useful to evaluate the performance of desalination systems. The second law of thermodynamics (exergy analysis) accounts for the available forms of energy in the process streams and energy sources with a reference environment and identifies the major losses of exergy destruction. This aids in developing efficient desalination processes by eliminating the hidden losses. This paper elaborates on exergy analysis of desalination processes to evaluate the thermodynamic efficiency of major components and process streams and identifies suitable operating conditions to minimize exergy destruction. Well-established MSF, MED, MED-TVC, RO, solar distillation, and membrane distillation technologies were discussed with case studies to illustrate the exergy performances.

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Exergoeconomic analysis and multi-objective optimization of a marine engine waste heat driven RO desalination system integrated with an organic Rankine cycle using zeotropic working fluid

2017

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Exergy costs analysis of water desalination and purification techniques by transfer functions

Cited by 10 publications

References 46 publications

Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply

Exergy assessment and exergy cost analysis of a renewable-based and hybrid trigeneration scheme for domestic water and energy supply

Exergy Evaluation of Desalination Processes

Exergoeconomic analysis and multi-objective optimization of a marine engine waste heat driven RO desalination system integrated with an organic Rankine cycle using zeotropic working fluid

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