Humidification Dehumidification Desalination

Lienhard, John H.

doi:10.1002/9781118904855.ch9

Cited by 19 publications

(23 citation statements)

References 82 publications

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“…It firstly enters the humidifier to get heated and humidified by the hot seawater (process 3-4). Then it is directed to the dehumidifier, where it is cooled down by the feed seawater (stream 6) and the moisture content is condensed (4)(5). The distillate (stream 10) is collected as the product water, while the preheated seawater is further heated using external heat sources (stream 11) before being sprayed into the humidifier.…”

Section: Process Descriptionmentioning

confidence: 99%

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Simultaneous production of cooling and freshwater by an integrated indirect evaporative cooling and humidification-dehumidification desalination cycle

Chen

Burhan

Shahzad

et al. 2020

Energy Conversion and Management

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Section: Process Descriptionmentioning

confidence: 99%

“…It has a low operation temperature (50-70 ℃), simple system components, easy maintenance and operation, and low initial plant costs. These advantages distinguish HDH from other desalination processes, making it suitable for integration with renewable energy sources [5].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous production of cooling and freshwater by an integrated indirect evaporative cooling and humidification-dehumidification desalination cycle

Chen

Burhan

Shahzad

et al. 2020

Energy Conversion and Management

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“…Although it does not compete with existing technologies for desalinating seawater in medium and large scale applications, HDH can be advantageous in decentralized, off-grid desalination applications where fresh water demand ranges up to several thousand cubic meters per day [1,2]. In addition, the technology does not use membranes and does not include hot metal surfaces, which allows it to treat highly saline water with some oil content without requiring expensive corrosion resistant metals.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic balancing of a fixed-size two-stage humidification dehumidification desalination system

Chehayeb

Narayan²,

Zubair

et al. 2015

Desalination

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Humidification dehumidification (HDH) is a desalination technology that has shown promise in small scale, decentralized applications. Previous studies on the multi-staging of HDH have used fixed-effectiveness models which do not explicitly account for transport processes in the components. However, to fully understand the effect of the variation of the mass flow rate ratio, it is necessary to implement heat and mass transfer models of the HDH system. In this paper, we model an HDH system consisting of a packed-bed humidifier and a multi-tray bubble column dehumidifier. We study the effect of the mass flow rate ratio on the performance of a fixed-size system, and we consider its effect on the entropy generation and the driving forces for heat and mass transfer. In addition, we define a generalized energy effectiveness for heat and mass exchangers. We also implement an air extraction/injection and simulate a wide range of operating conditions. We define criteria for the best system performance, and we study the effect of the distribution of available area between separate stages. We also present a thorough explanation of why the direction of extraction should always be from the humidifier to the dehumidifier.

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“…Narayan et al [17] and Mistry et al [18] showed that the top water temperature and mass flow rate ratio of air and water streams play a major role in identifying the maximum GOR in an HDH system. Some of the existing HDH thermal desalination technologies were discussed by Narayan et al [19]. Some of the HDH systems discussed in their study were multi-stage air heated cycle, mechanical compression driven cycle, HDH with thermodynamic balancing, HDH with common heat transfer wall, and hybrid HDH system with reverse osmosis, among others.…”

Section: Introductionmentioning

confidence: 99%