Experimental and theoretical study of a humidification-dehumidification water desalination system using solar energy

Orfi, Jamel; Laplante, M.; Marmouch, H.; Galanis, Nicolas; Benhamou, Brahim; Nasrallah, Sassi Ben; Nguyen, Cong Tam

doi:10.1016/j.desal.2004.06.181

Cited by 99 publications

(30 citation statements)

References 7 publications

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“…[17] and Orfi et al [52]. In a wetted-wall tower, a thin film of water is formed running downward inside a vertical pipe, with air flowing either co-currently or counter-currently.…”

Section: Wetted-wall Towers Have Been Used As Humidifier In Hdh Systementioning

confidence: 99%

“…At the top of the dehumidifier, the hot humid air is forced down where the distilled water is recovered. It is important to note that heat recovery in an HDH system requires a larger heat transfer area for improving the overall system Packed bed direct contact heat exchangers were used in a few researchers ( [52], [64] & [65]), because the film condensation heat transfer is tremendously degraded in the presence of non-condensable gas. An additional shell and tube heat exchanger is used to cool the desalinated water from which a portion is re-circulated and sprayed in the condenser.…”

Section: Dehumidifiersmentioning

confidence: 99%

“…Orfi et al [52] • The experimental setup used in this work uses a solar heater for both air and water (has 2 m 2 collector surface area).…”

Section: Nawayseh Et Al [60]mentioning

confidence: 99%

See 2 more Smart Citations

The potential of solar-driven humidification–dehumidification desalination for small-scale decentralized water production

Narayan

Sharqawy

Summers

et al. 2010

Renewable and Sustainable Energy Reviews

358

132

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World-wide water scarcity, especially in the developing world, indicates a pressing need to develop inexpensive, decentralized small-scale desalination technologies which use renewable resources of energy. This paper provides a comprehensive review of the stateof-the-art in one of the most promising of these technologies, solar-driven humidification-dehumidification (HDH) desalination. Previous studies have investigated many different variations on the HDH cycle. In this paper, performance parameters which enable comparison of the various versions of the HDH cycle have been defined and evaluated. To better compare these cycles, each has been represented in psychometric coordinates. The principal components of the HDH system are also reviewed and compared, including the humidifier, solar heaters, and dehumidifiers. Particular attention is given to solar air heaters, for which design data is limited; and direct air heating is compared to direct water heating in the cycle assessments. Alternative processes based on the HDH concept are also reviewed and compared. Further, novel proposals for improvement of the HDH cycle are outlined. It is concluded that HDH technology has great promise for decentralized small-scale water production applications, although additional research and development is needed for improving system efficiency and reducing capital cost.

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“…[17] and Orfi et al [52]. In a wetted-wall tower, a thin film of water is formed running downward inside a vertical pipe, with air flowing either co-currently or counter-currently.…”

Section: Wetted-wall Towers Have Been Used As Humidifier In Hdh Systementioning

confidence: 99%

Section: Dehumidifiersmentioning

confidence: 99%

See 1 more Smart Citation

The potential of solar-driven humidification–dehumidification desalination for small-scale decentralized water production

Narayan

Sharqawy

Summers

et al. 2010

Renewable and Sustainable Energy Reviews

358

132

View full text Add to dashboard Cite

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“…Al-Kharabsheh and Yogi [17] fabricated a water desalination system using low-grade solar heat and compared the study results with the theoretically-predicted values. Orfi et al [18] carried out the experiments and theoretical study of a humidification-dehumidification sea water desalination system using solar energy. The above-mentioned previous studies provide this study with the idea of having the solar desalination system installed and comparing the experimental results with the theoretical ones.…”

Section: Introductionmentioning

confidence: 99%

A Study on the Prediction of the Optimum Performance of a Small-Scale Desalination System Using Solar Heat Energy

2017

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Abstract:Although water is an essential element for the survival of all humankind, there are, however, still areas where water is not sufficiently supplied. It is a reality today that supplying energy for producing clean water is also difficult in such areas. This study develops a fresh water generator using solar heat, which is a clean energy source, and a small-scale desalination system which can be configured in parallel so that it can cope with various changes in the water supply situation. In addition, this study has developed a simulation program capable of estimating the optimum installation angle of a solar collector in such a way as to be suitable for the period of water demand, as well as the environment of the installation area, by allowing for the fact that it is difficult to change the installation angle or conditions after the installation of a fixed solar collector. In order to carry out these issues, this study has set up the experimental apparatus of a small-scale desalination system and obtained data on the amounts of fresh water generation depending on solar heat storage temperatures through empirical experiments. By applying the data in the simulation program, this study proposed the optimum installation angle for the necessary conditions.

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“…Cooling water flow and its temperature can increase the system productivity [12]. In HDH process the ambient conditions affect the unit performance especially when coupled with a solar energy source, hence it affects the unit productivity [13]. The exergy efficiency is higher in the shorter humidifier tower with a large diameter, which is an important factor in the design of HDH desalination process [14].…”

mentioning

confidence: 99%

Experimental Study of Humidification AndDehumidification Desalination Process

Hady¹,

El‐Halwagi²,

Alghamdi³

et al. 2018

IJET

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Abstract-The humidification-dehumidification process (HDH) is a thermal technique adapted for water desalination.This technique has many advantages such as moderate installation, simplicity and operates at relatively low temperatures when compared with other commercial thermal processes. HDH process is perfectly suitable for the decentralized areas where a small-scale desalination technology uses renewable resources of energy. The aim of this paper is to present the experimental analysis of the process providing the principle of functioning and the characteristics of the process when a different key variable such as air flow rate and humidifier inlet water temperature is altered. The experiment designed, installed and operated where air flow rates tested at constant humidifier inlet water temperature. To study the influence of air flow rate variation on the system, several experimental runs are implemented at different air flow rates at constant inlet water temperature. The experiments are repeated where humidifier inlet water temperature is changed. The system evaluated after steady state operation within one hour, and the production is collected. Finally, the system analyzed to find the effect of air/water flow ratio on the system productivity, humidifier mass transfer coefficient and dehumidifier overall heat transfer coefficient. Moreover, the sensible heat from the humidifier inlet water is studied as the analysis includes the inlet water temperature effect on the process. The system best results obtained at the maximum tested air flow rate where the GOR was 0.22 and the production cost of 0.043 US$/liter.The highest productivity of the system found to be 5.424 l/hr at 50 o C humidifier inlet water temperature. The general outcome of the study provides that HDH desalination process is more favorable towards increasing the air flow rates and humidifier inlet water temperature where the mass transfer and overall heat transfer coefficients also increased. The system optimized for best economic and operating conditions. Keyword -Desalination, Humidification, Dehumidification, Design. I. INTRODUCTION Large parts of Saudi Arabia are water-stressed. Large-scale desalination technologies have become widely available as commercial technology over the last few decades. On the other hand, small-scale desalination technologies for arid areas have not attracted similar commercial interests. The major challenges for a remote water production are the need for systems that incur simplicity, inexpensive components,the ability to adapt to renewables, and ensure relatively maintenance-free operation. Also it is recommended to study simplest efficient designs in order to be used for arid areas. El-Halwagi [1] provided the shortcut method for the design of once-through multi-stage flash (MSF) in order to obtain better design analysis of the unit components and process integration which reveals favorable results compared with the existing plant data. Desalination processes such as Multi-effect distillation (MED), reverse osmosis...

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Experimental and theoretical study of a humidification-dehumidification water desalination system using solar energy

Cited by 99 publications

References 7 publications

The potential of solar-driven humidification–dehumidification desalination for small-scale decentralized water production

The potential of solar-driven humidification–dehumidification desalination for small-scale decentralized water production

A Study on the Prediction of the Optimum Performance of a Small-Scale Desalination System Using Solar Heat Energy

Experimental Study of Humidification AndDehumidification Desalination Process

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