Optimisation of single slope solar still to desalinate seawater for hydrogen harvesting application

Ong, Cheah Meng (2016) Optimisation of single slope solar still to desalinate seawater for hydrogen harvesting application. Masters thesis, Universiti Malaysia Sabah.

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Abstract

The challenging efforts of this project have been designed to explore the abundance of renewable solar energy for the desalination of the inexhaustible seawater resource for the production of the most critical clean water resource necessary for the human consumption and existence, in particular to the poorer rural populations. The working principle of a solar still has been based on the heat transfer processes of three major components of the solar still (glass cover, seawater and basin) and its surrounding as a result of exposing the system to the solar irradiance. Two analytical approaches have been utilized to develop the theoretical model and the numerical model by forward finite difference approach for predicting the solar still performance. However, the numerical model has shown to be significantly far more accurate in predicting the experimental results than the theoretical model, particularly in a less consistent and varied solar irradiance during the latter part of the afternoon hours. At the same time, the optimization of the single slope solar still as a Simple, effective, safe and user friendly water treatment device, for the production of clean water has been experimentally verified. The experimental result has found that the optimum slope angle required is six degree (6°), and the optimum volume amount of seawater is three litres (3 l) for the solar still to produce the optimum clean water production at 1.4 litres per sunny day. A simulation feasibility study consists of the optimized single slope solar still with a PEM electrolyzer of an output rating of 2.5 litres/minute has also been conducted to achieve a yield production of 1,335 litres of hydrogen gas under the atmospheric pressure, which has an equivalence of about 4.7kWh of electricity.

Item Type: Thesis (Masters)
Uncontrolled Keywords: renewable solar energy, numerical model, clean water resource
Subjects: Q Science > QB Astronomy
Divisions: FACULTY > Faculty of Engineering
Depositing User: Munira
Date Deposited: 28 Dec 2017 22:34
Last Modified: 28 Dec 2017 22:34
URI: http://eprints.ums.edu.my/id/eprint/5837

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