Abstract
To offer for potable water shortages, sea water desalination is a potential solution for the global rising demand for fresh water. The latent heat of fusion is about one-seventh the latent heat of vaporisation, thus indicating the benefit of lower energy consumption for the freeze desalination process. Limited literature is reported on computational fluid dynamics (CFD) on freeze desalination. Therefore, analysing and investigating thermodynamic processes are easily conducted by the powerful tool of CFD. A single unit of ice formation in an ice maker machine was modelled using ANSYS Fluent software three-dimensionally. Energy, species transport and solidification/melting modules were used in building the CFD model. Parametric analysis was conducted using the established CFD model to predict the effects of freezing temperature and the geometry of the ice maker machine; on ice production and the freezing time. Lower freezing temperatures allowed more ice production and faster freezing. Increasing the diameter and the length of the freezing tube enabled more ice to be produced.
Highlights
Water is a fundamental element that contributes imperatively in the growth of human society [1]
Freshwater being produced by the elimination of dissolved minerals from sea water is the process of desalination; as it proves to be an answer to the water shortage issue [4]
Parametric analysis has been carried out using the established computational fluid dynamics (CFD) model to predict the effects of freezing temperature and the geometry of the ice maker machine; on ice production and freezing time
Summary
Water is a fundamental element that contributes imperatively in the growth of human society [1]. Technology (VCD) is used for small-scale applications [7] These desalination methods have the disadvantages of high energy consumption and high operating costs [8]. The salts are rejected in freeze desalination as the formation of ice prevents inclusion of any solutes This is due to the nature of the ice crystal lattice only formed by pure water without any solutes, which is called the water solidification phenomena [9,10]. A wide range of construction methods and a range of materials are acceptable in freeze desalination due to is low operating temperatures in comparison to other distillation processes that permits corrosion and scale formation [12]. The CFD model that has been created was used to conduct parametric study to investigate the outcomes of freezing temperature and the geometry of the ice maker machine; on production of ice and freezing time
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