Effect of humidifier characteristics on performance of a small-scale humidification-dehumidification desalination system

Soomro, Sadam Hussain; Santosh, R.; Bak, Chul-U; Yoo, Chung Sik; Kim, Woo-Seung; Kim, Young-Deuk

doi:10.1016/j.applthermaleng.2022.118400

Cited by 19 publications

(10 citation statements)

References 35 publications

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“…Слід зауважити, що в усіх наукових роботах, наведених у таблиці, бракує вимірювання втрат тисків води. Водночас, аеродинамічний опір зволожувачів зафіксовано лише у працях [12], [16], [18].…”

Section: рис 8 загальний вигляд камери трубчастого зволожувачаunclassified

“…10. Залежність термодинамічної ефективності від масової витрати солоної води для зволожувачів: 1з пакувальним матеріалом [17]; 2ультразвукового [13]; 3барботажного [18]; 4з пакувальним матеріалом [16];…”

Section: типunclassified

“…11. Залежність аеродинамічних втрат тиску від питомої продуктивності для зволожувачів: 1багатострунного [12]; 2з пакувальним матеріалом [16]; 3барботажного [18] З рис. 10 видно, що найвищу ефективність мають барботажні колони (лінія 3).…”

Section: типunclassified

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Energy Characteristics of Thermal Desalation Systems with Different Types of Humidifiers

Sereda,

Prytula

2023

VVPI

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Section: рис 8 загальний вигляд камери трубчастого зволожувачаunclassified

Section: типunclassified

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Energy Characteristics of Thermal Desalation Systems with Different Types of Humidifiers

Sereda,

Prytula

2023

VVPI

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“…For instance, multi-effect distillation (MED) [ 2 , 3 ], multi-stage flash (MSF) [ 4 ], reverse osmosis (RO) [ 5 ], mechanical vapor compression (MVC) [ 6 ], and thermal vapor compression (TVC) [ 7 ] have been widely applied for centralized and large-scale freshwater production from salty water. Most of these desalination systems require huge amounts of energy for their operation and are mostly suitable for large-scale applications [ 8 ]. Additionally, these desalination technologies require huge capital investments, are complex or complicated, and demand experts or technical know-how for their maintenance and sustainability.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of a Plate–Frame Water Gap Membrane Distillation System for Seawater Desalination

Lawal,

Abdulazeez,

Alsalhy

et al. 2023

Membranes

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This study presented a detailed investigation into the performance of a plate–frame water gap membrane distillation (WGMD) system for the desalination of untreated real seawater. One approach to improving the performance of WGMD is through the proper selection of cooling plate material, which plays a vital role in enhancing the gap vapor condensation process. Hence, the influence of different cooling plate materials was examined and discussed. Furthermore, two different hydrophobic micro-porous polymeric membranes of similar mean pore sizes were utilized in the study. The influence of key operating parameters, including the feed water temperature and flow rate, was examined against the system vapor flux and gained output ratio (GOR). In addition, the used membranes were characterized by means of different techniques in terms of surface morphology, liquid entry pressure, water contact angle, pore size distribution, and porosity. Findings revealed that, at all conditions, the PTFE membrane exhibits superior vapor flux and energy efficiency (GOR), with 9.36% to 14.36% higher flux at a 0.6 to 1.2 L/min feed flow rate when compared to the PVDF membrane. The copper plate, which has the highest thermal conductivity, attained the highest vapor flux, while the acrylic plate, which has an extra-low thermal conductivity, recorded the lowest vapor flux. The increasing order of GOR values for different cooling plates is acrylic < HDPE < copper < aluminum < brass < stainless steel. Results also indicated that increasing the feed temperature increases the vapor flux almost exponentially to a maximum flux value of 30.36 kg/m2hr. The system GOR also improves in a decreasing pattern to a maximum value of 0.4049. Moreover, a long-term test showed that the PTFE membrane, which exhibits superior hydrophobicity, registered better salt rejection stability. The use of copper as a cooling plate material for better system performance is recommended, while cooling plate materials with very low thermal conductivities, such as a low thermally conducting polymer, are discouraged.

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“…However, it is important to recognize that the performance and cost-effectiveness of an HDH desalination system depends on various factors, including the availability and cost of heat sources, local climate conditions, and specific design and operating parameters. To optimize HDH desalination systems, several studies have mainly focused on enhancing system performance by making structural improvements and utilizing the condensationevaporation heat of heat pump systems to increase their energy utilization efficiency, thus improving the freshwater production performance [5][6][7]. Secondly, the selection of appropriate packing materials can significantly improve the contact area and duration between the spray water and air entering the humidifier, thus enhancing the heat-mass transfer effect, improving the humidification efficiency of the humidifier, and consequently improving the energy efficiency of the freshwater production system [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on the Heat and Mass Transfer Characteristics of Humidifiers in Humidification–Dehumidification Desalination Systems

Zhu,

Wu,

Ren

et al. 2023

Energies

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The humidifier plays a key role in a humidification–dehumidification (HDH) desalination system; it directly affects both the freshwater production efficiency and energy consumption ratio of the system. In this study, for a humidifier in an HDH system, a heat–mass coupled differential equation model of spray water and air on the surface of the packing material was established, and the effects of parameters such as the spray water temperature (tw), mass flow rate of spray water (mw), air temperature (ta), and air mass flow rate (ma) on the humidification performance of humidifiers composed of eight different types of packing materials were investigated. The results show the following: (1) Under the same inlet spray water and air conditions, the humidification performance of different packing materials from good to bad is as follows: cellulose paper, polypropylene, hackettes, saddles, snowflakes, wooden slats, polyvinyl chloride, gunny bag cloth. (2) Increasing the tw can significantly improve the humidification performance. To achieve higher humidification energy efficiency, it is recommended to increase the tw to above 80 °C. (3) With the increase in the mw, although the humidification efficiency (εhum) decreases slightly, the humidification rate (mhum) increases, and the specific humidification energy ratio (ηhum) decreases accordingly. To maintain a high mhum and a low ηhum, it is advisable to control the mw at not less than 0.5 kg/s. (4) Increasing the humidifier inlet ta can improve the mhum, εhum, and ηhum, although not as effectively as increasing tw. (5) Increasing the ma can improve mhum and εhum. However, it simultaneously increases the ηhum. The results of this study can provide theoretical guidance for the selection of efficient packing materials and the optimization of humidifier operating conditions in HDH desalination systems.

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Effect of humidifier characteristics on performance of a small-scale humidification-dehumidification desalination system

Cited by 19 publications

References 35 publications

Energy Characteristics of Thermal Desalation Systems with Different Types of Humidifiers

Energy Characteristics of Thermal Desalation Systems with Different Types of Humidifiers

Experimental Investigation of a Plate–Frame Water Gap Membrane Distillation System for Seawater Desalination

Study on the Heat and Mass Transfer Characteristics of Humidifiers in Humidification–Dehumidification Desalination Systems

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