A review on numerous means of enhancing heat transfer rate in solar-thermal based desalination devices

Jani, Hardik K.; Modi, Kalpesh V.

doi:10.1016/j.rser.2018.05.023

Cited by 85 publications

(22 citation statements)

References 65 publications

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“…Moreover, the distilled water productivity increases with the increase in concentration , 0 (201 Web of Conferences https://doi.org/10.1051/e3sconf/2019111010 9) 201 E3S 111 10 CLIMA 9 56 56 and then at high concentrations productivity starts to reduce. Moreover Jani and Modi [53] and Bait and Si-Ameur [54] also published a review study on nanofluid based solar stills [53]. Gnanadeson et al [55] studied with the water based MWCNT nanofluid in the modified vacuum solar still and reported that utilization of nanofluid increased evaporation rate and hence condensation rate on the cooler surface.…”

Section: Solar Stillsmentioning

confidence: 99%

Carbon-based Nanofluid Applications in Solar Thermal Energy

2019

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Renewable energy sources such as solar, wind and geothermal are proposed as an alternative to fossil fuels whose excessive use causes global warming. The most popular one of the renewable energy sources is considered as solar energy due to the fact that required energy is provided by the sun entire year around the world. Solar energy systems convert the solar radiation to the useful heat or electricity. In order to achieve better performance in solar thermal systems many studies have been conducted. Some of these studies suggest that heat transfer fluid could be changed with the nanofluids which can be defined as new generation heat transfer fluid. Nanofluids are suspensions of nano-sized particles such as metals, metal-oxides, and Carbon-allotropes (C), in the conventional base-fluids (water, ethylene glycol and oil). Using nanofluid enhances the efficiency and thermal performance of solar systems due to their better thermophysical and optical properties. Recently, C-based nanofluids are getting attention due to their enhanced thermal conductivity and absorptivity at even low concentrations. The results show that C-based nanofluids have a potential to use in solar energy systems: solar collectors, solar stills, photovoltaic/thermal systems.

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Section: Solar Stillsmentioning

confidence: 99%

Carbon-based Nanofluid Applications in Solar Thermal Energy

2019

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“…Thus, it can be concluded that MED provides a basis for the development of competitive desalination technology. Furthermore, Jani et al [63] reviewed several research articles and concluded that nanofluids enhanced heat transfer from the absorber plate. Nanofluids have improved thermo-physical properties such as density, thermal conductivity and more, which increased the heat transfer rate.…”

Section: Opportunity To Develop Renewable Energy Powered Cost-competimentioning

confidence: 99%

The Role of Nanofluids and Renewable Energy in the Development of Sustainable Desalination Systems: A Review

Singh¹,

Atieh²,

Al‐Ansari³

et al. 2019

Preprint

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Desalination accounts for 1% of the total global water consumption and is an energy-intensive process, with the majority of operational expenses attributed to energy consumption. Moreover, at present, a significant portion of the power comes from traditional fossil fuel-fired power plants and the greenhouse gas emissions associated with power production along with concentrated brine discharge from the process, pose a severe threat to the environment. Due to the dramatic impact of climate change, there is a major opportunity to develop sustainable desalination processes to combat the issues of brine discharge, greenhouse gas emissions along with a reduction in energy consumption per unit of freshwater produced. Nanotechnology can play a vital role to achieve specific energy consumption reduction as nanofluids application increases the overall heat transfer coefficient enabling the production of more water for the same size desalination plant. Furthermore, concentrated brine discharge has a negative impact on the marine ecosystems, and hence, this problem must also be solved to support the objective of sustainable desalination. Several studies have been carried out in the past several years in the field of nanotechnology applications for desalination, brine treatment and the role of renewable energy in desalination. This paper aims to review the major advances in this field of nanotechnology for desalination. Furthermore, a hypothesis for developing an integrated solar thermal and nanofluid sustainable desalination system, based on the cyclic economy model is proposed.

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“…1 The current global clean water accessibility is around 4200 billion m 3 that is far beneath the actual requirements. 2 Except HDH, the cost linked with energy utilization of all above methods is huge and also has atmospheric issues because of the usage of nonrenewable fuels. 2 Merely 2.5% of entire water reserve of the earth is fresh, and the remnant 97.5% is the brackish water.…”

Section: Introductionmentioning

confidence: 99%

“…Water is the one of the prime constituents on the earth and available in abundant amount. 2 Merely 2.5% of entire water reserve of the earth is fresh, and the remnant 97.5% is the brackish water. 1 Out of that 2.5%, a large share is inaccessible because of being frozen in polar region.…”

Section: Introductionmentioning

confidence: 99%

“…3 There are several approaches accessible for purification of unsanitary solutions, namely, humidification-dehumidification (HDH) distillation, mechanical vapour squeezing distillation, multiple effect desalination, multiple stage flash desalination, reverse osmosis (RO), and electrodialysis reversal. 2 Except HDH, the cost linked with energy utilization of all above methods is huge and also has atmospheric issues because of the usage of nonrenewable fuels. 4 The impurities lying in the water can be removed through the solar desalination system.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system

Patel

2019

Int J Energy Res

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The desalination of adulterated water for potable water is very important and in-demand because of the scarcity of the potable water. The bubble column (BC)-type humidification-dehumidification (HDH) desalination systems have shown promising results for low quantum need of fresh water. The present work consists of bubbler humidifier for increasing the humidity of atmospheric air and thermoelectric cooling (TEC) modules for the dehumidification of the humidified air. The air and water have been heated through external device for the sake of performance enhancement. The work of the proposed HDH system has been assessed experimentally as well as theoretically in order to identify the impact of system operational parameters like temperature of air and water, diameter of hole on the periphery of circling tube, height of hot water column, and the air mass flow rate on the production of fresh water.The daily distillate production achieved during the investigation was in the range of 7 to 13 L/d for different operational parameters although the best experimental productivity of the system was reported 12.96 L/d for 2 mm of hole diameter, 0.016 kg/s of air mass flow rate, 60°C of temperature of water, 27°C of temperature of air, and 7 cm of water column height in the humidifier.The gained output ratio of the system was 0.8 for 0.016 kg/s of mass flow rate of air. A theoretical model of the system is also proposed, and results of model are validated against experimental results, which have shown the great agreement.Nomenclature Notation: A, water area, m 2 ; a s , specific surface area, 1/m; C p , specific heat, J/kg K; D, diameter, m; d o , diameter of hole on spiral tube, mm; D AB , diffusion coefficient, m 2 /s; G, gravitational acceleration, m/s 2 ; h, specific enthalpy, J/kg; h fg , latent heat of evaporation, J/kg; h t , heat transfer coefficient, W/m 2 , air superficial velocity, m/s; V c , liquid circulation velocity, m/s; V b , bubble velocity, m/s; V, volume of bubble column, m 3 ; W, specific humidity, kg/kg of dry air; x, mass flow rate, kg/s; z, height of water column in humidifier, cm Greek letters: ε, void fraction; Ρ, density, kg/m 3 ; σ, surface tension of water, N/m; α, Seebeck coefficient, V/K Subscript: 1, air at humidifier inlet; 2, air at humidifier outlet (dehumidifier inlet); 3, air at dehumidifier outletHow to cite this article: Patel V, Patel R, Patel J. Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system. Int J Energy Res. 2020;44:890-901. https://doi.org/ 10.1002/er.4931

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A review on numerous means of enhancing heat transfer rate in solar-thermal based desalination devices

Cited by 85 publications

References 65 publications

Carbon-based Nanofluid Applications in Solar Thermal Energy

Carbon-based Nanofluid Applications in Solar Thermal Energy

The Role of Nanofluids and Renewable Energy in the Development of Sustainable Desalination Systems: A Review

Theoretical and experimental investigation of bubble column humidification and thermoelectric cooler dehumidification water desalination system

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