Study on refined mathematical model of solar chimney power plant integrated with seawater desalination and the influence of dewing

Journal article


Ge, Y. T. (2023). Study on refined mathematical model of solar chimney power plant integrated with seawater desalination and the influence of dewing. Desalination. 554 (2023), p. 116493. https://doi.org/10.1016/j.desal.2023.116493
AuthorsGe, Y. T.
Abstract

In order to more accurately evaluate the operation and output characteristics of the solar chimney power plant integrated seawater desalination, a refined mathematical model for unsteady heat and mass transfer was built under consideration of the convection heat transfer mechanism of the collector, dewing phenomenon, and the disturbance to the hot airflow caused by the oblique-toothed flow channel boundary. The influence of nighttime dewing and humid environments on system performance was discussed. The results show that it is feasible and more appropriate to use the forced convection heat transfer coefficient of bellows to consider the influence of the oblique-toothed flow channel boundary; the refined mathematical model is also more accurate and reliable. Due to the effect of seawater heat storage, dewing has little effect on system performance, and the integrated system has a better anti-dewing negative impact characteristic. However, when the ambient humidity reached a higher level, dewing had a greater negative impact on freshwater production. The critical value of relative humidity for dewing to occur is 51 %. When the relative humidity increases from 45 % to 60 %, the daily utilization efficiency of solar energy decreases from 27.4 % to 22.5 %.

Keywordssolar chimney power plant; seawater desalination; dewing phenomenon; convection heat transfer; refined model
Year2023
JournalDesalination
Journal citation554 (2023), p. 116493
PublisherElsevier
ISSN1873-4464
Digital Object Identifier (DOI)https://doi.org/10.1016/j.desal.2023.116493
Web address (URL)https://www.elsevier.com/locate/desal
Publication dates
Print03 Mar 2023
Publication process dates
Accepted15 Feb 2023
Deposited22 Mar 2023
Accepted author manuscript
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Open
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