Exergoeconomic and exergoenvironmental evaluation of a solar-energy- integrated vacuum membrane distillation system for seawater desalination

Triki, Zakaria; Fergani, Zineb; Bouaziz, Mohamed Najib

doi:10.5004/dwt.2021.27144

Cited by 3 publications

(3 citation statements)

References 74 publications

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“…Exergoeconomic is a method based on exergy that determines the location, amount, sources, and cost of thermodynamic inefficiencies in an energy-conversion system. [110][111][112][113] The cost of exergy destruction, system recovery factor and exergoeconomic factor are the major parameters for the exergoeconomic analysis.…”

Section: Exergoeconomic Analysismentioning

confidence: 99%

Comprehensive assessment of heat pump dryers for drying agricultural products

Loemba

Kichonge

Kivevele

2022

Energy Science & Engineering

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Fruits and vegetables are agricultural products that require preservation to enhance and protect shelf life, encapsulate natural flavour, and retain nutritional content. Globally, agricultural products are preserved by a range of means, the most prevalent of which is the heat pump dryer, which produces the best results even in unfavourable climatic conditions. Heat pump dryers come in different types and their performance varies depending on the type. This study aims to evaluate recently developed heat pump dryers based on key performance indicators, impacts on food colour and nutritional content, techno‐economic, exergoeconomic, and environmental issues associated with the development of heat pump dryers, which are underrepresented in most of the existing heat pump dryers' reviews. This study also discusses mathematical drying kinetic models, and regulation or policy aspects related to the development of heat pump dryers. In the present study, the results on performance analysis indicate that heat pump dryers examined were effective in reducing drying time and obtaining high coefficients of performance ranging from 1.94 to 5.338 and specific moisture extraction rate ranging from 0.156 to 9.25 kg/kWh, as well as significantly reducing energy consumption by up to 80%. The nutritional composition and colour results show that heat pump dryers maintain the maximum nutrient content while also improving colour. The expansion valve has the lowest exergoeconomic factor of all heat pump dryer components, whereas the compressor has the highest cost of exergy destruction in general, according to the results of exergoeconomic analysis. Techno‐economic analysis results demonstrated that most developed heat pump dryers have short payback periods ranging from 1.6 to 3.6 years. However, due to a lack of research in this field, the environmental implications of heat pump dryers are unknown. As per the findings of this study, future research in this field should focus on the design of simple and low‐energy heat pump dryers, life cycle, techno‐economic, and exergoeconomic assessments.

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Section: Exergoeconomic Analysismentioning

confidence: 99%

Comprehensive assessment of heat pump dryers for drying agricultural products

Loemba

Kichonge

Kivevele

2022

Energy Science & Engineering

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“…The increase in TPC can be attributed to the rise to driving force across the membrane which is resulting from rise in feed temperature. In addition, the increased feed temperature reduces the feed viscosity consequently enhancing the mass transfer within the system [27,45]. The observed TPC value of near to 1 indicates less impact of temperature polarization on the process which ultimately leads to well designed MD cell.…”

Section: Effect Of Operating Parameters On Temperature and Concentrat...mentioning

confidence: 99%

Sea and brackish water desalination through a novel PVDF-PTFE composite hydrophobic membrane by vacuum membrane distillation

Madupathi,

Srishti,

Fatima

et al. 2024

Discov Chem Eng

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The present study aims to evaluate the performance of porous hydrophobic Polyvinylidene fluoride − Polytetrafluoroethylene (PVDF-PTFE) composite membranes for desalination by vacuum membrane distillation (VMD) technique. The effect of operating parameters such as feed NaCl concentration (10,000 to 40,000 mg/L), feed temperature (50 °C to 80 °C), and downstream pressure (80 to 120 mmHg) on water permeation rate was studied. The increase in feed temperature enhanced the water permeation rate due to a rise in driving force across the membrane. For a constant downstream pressure of 80 mmHg, feed temperature of 80 °C and feed flow rate of 80 L/h, the membrane exhibited a maximum water flux of 3 kg/m2h with 99.86% salt rejection when aqueous NaCl concentration of 10,000 mg/L was charged as feed. Membrane characterization was performed using various analytical tools to determine physico-chemical properties such as pore size, structural elucidation, thermal stability, crystallinity, and hydrophobicity of the membrane material. Further, a temperature and concentration polarization coefficient-based analysis was performed by solving the mass and heat transport model equations using MATLAB software. The proposed research study promotes the application of VMD for recovering potable water from highly saline sea/brackish water and alleviates brine disposal issues.

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“…In this regard, desalination systems are generally designed and optimized from an energy and economic perspective. The exergy-based method has been successfully used for the analysis and optimization of energy and the economic performance of desalination systems [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Desalination Performance with a Thermal Vapor Compression System

Fergani

Triki

Menasri

et al. 2023

Water

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Multi-effect distillation with thermal vapor compression (MED-TVC) is a highly energy-efficient desalination technology that can provide a reliable and sustainable source of high-quality water, particularly in areas with limited energy infrastructure and water resources. In this study, a numerical model based on exergoeconomic approach is developed to analyze the economic performance of a MED-TVC system for seawater desalination. A parallel/cross feed configuration is considered because of its high energy efficiency. In addition, a parametric study is performed to evaluate the effects of some operational parameters on the total water price, such as the top brine temperature, seawater temperature, motive steam flow rate, and number of effects. The obtained results indicate that the total water price is in the range of 1.73 USD/m3 for a distilled water production of 55.20 kg/s. Furthermore, the exergy destructions in the effects account for 45.8% of the total exergy destruction. The MED effects are also identified to be the most relevant component from an exergoeconomic viewpoint. Careful attention should be paid to these components. Of the total cost associated with the effects, 75.1% is due to its high thermodynamic inefficiency. Finally, the parametric study indicates that adjusting the top brine temperature, the cooling seawater temperature, the motive steam flow rate, and the number of effects has a significant impact on the TWP, which varies between 1.42 USD/m3 and 2.85 USD/m3.

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Exergoeconomic and exergoenvironmental evaluation of a solar-energy- integrated vacuum membrane distillation system for seawater desalination

Cited by 3 publications

References 74 publications

Comprehensive assessment of heat pump dryers for drying agricultural products

Comprehensive assessment of heat pump dryers for drying agricultural products

Sea and brackish water desalination through a novel PVDF-PTFE composite hydrophobic membrane by vacuum membrane distillation

Analysis of Desalination Performance with a Thermal Vapor Compression System

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