Analysis of a novel solid desiccant evaporative cooling system integrated with a humidification-dehumidification desalination unit

Lai, Lanbo; Wang, Xiaolin; Kefayati, Gholamreza; Hu, Eric

doi:10.1016/j.desal.2023.116394

Cited by 10 publications

(2 citation statements)

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“…In this study, a co-producing cooling and water system was numerically investigated under ventilation, recirculation, and half-recirculation modes. The studied system is based on solid desiccant/evaporative cooling and HDH desalination technologies, as reported in our previous study [29]. A detailed explanation of the system's working principle for each operation mode is presented in the following sections.…”

Section: System Descriptionmentioning

confidence: 99%

“…However, research on the combination of solid desiccant evaporative cooling systems and HDH desalination units is still insufficient. Recently, Lai et al [29] investigated a new hybrid arrangement of a solid desiccant-assisted M-cycle cooling system combined with an HDH desalination unit that simultaneously utilised the two humid waste air streams from the M-cycle's wet channels and the desiccant wheel for water production. However, the influence of the operation strategy, comprising ventilation, recirculation, and half-recirculation modes, on the system's cooling and water production performance was not reported.…”

Section: Introductionmentioning

confidence: 99%

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Cooling and Water Production in a Hybrid Desiccant M-Cycle Evaporative Cooling System with HDH Desalination: A Comparison of Operational Modes

et al. 2023

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In this paper, the cooling and freshwater generation performance of a novel hybrid configuration of a solid desiccant-based M-cycle cooling system (SDM) combined with a humidification–dehumidification (HDH) desalination unit is analysed and compared in three operational modes: ventilation, recirculation, and half recirculation. The HDH unit in this system recycles the moist waste air sourced from the M-cycle cooler and rotary desiccant wheel of the SDM system to enhance water production. A mathematical model was established and solved using TRNSYS and EES software. The results of this study indicate that the recirculation mode exhibited superior cooling performance compared to the other two modes, producing up to 7.91 kW of cooling load and maintaining a supply air temperature below 20.85 °C and humidity of 12.72 g/kg under various ambient conditions. All the operational modes showed similar water production rates of around 52.74 kg/h, 52.43 kg/h, and 52.14 kg/h for the recirculation, half-recirculation and ventilation modes, respectively, across a range of operating temperatures. The recirculation mode also exhibited a higher COP compared to the other modes, as the environmental temperature and relative humidity were above 35 °C and 50%. However, it should be noted that the implementation of the recirculation mode resulted in a higher water consumption rate, with a maximum value of 5.52 kg/h when the inlet air reached 45 °C, which partially offset the benefits of this mode.

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Section: System Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%