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Wan Muzammil
Faculty of Engineering, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Malaysia

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Journal article
Published: 20 May 2021 in Sustainability
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An ongoing project to implement a mini standalone solar photovoltaic (PV) generation system of 2.5 kWp capacity at the eco-tourism centre of Liogu Ku Silou-Silou (EPLISSI), Sabah, was initiated in 2019. Since the solar panel support (ground mounting) used in this project will be erected separately, the main goals of this study are to estimate the optimum tilt angle, βopt, and orientation for the solar PV modules. To achieve these goals, the Liu and Jordan isotropic diffuse radiation model was used (1960). Another three isotropic diffuse sky radiation models (Koronakis model, Badescu model, and Tian model) were applied to estimate the optimum tilt angle with the orientation kept facing due south. For verification purposes, the PV power output data obtained from an online PV simulator known as Global Solar Atlas or GSA 2.3 was used and compared to the results of the four isotropic models. The results suggest that the Tian model is more suitable for approximating insolation, as it was proven to have the lowest difference among all models and is in close agreement with the result of the optimum tilt angle provided by GSA 2.3. However, the outcomes demonstrated from the isotropic models propose an error up to 30% (in the range of 31% to 32%) as compared to GSA 2.3.

ACS Style

Maryon Matius; Mohd Ismail; Yan Farm; Adriana Amaludin; Mohd Radzali; Ahmad Fazlizan; Wan Muzammil. On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification. Sustainability 2021, 13, 5730 .

AMA Style

Maryon Matius, Mohd Ismail, Yan Farm, Adriana Amaludin, Mohd Radzali, Ahmad Fazlizan, Wan Muzammil. On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification. Sustainability. 2021; 13 (10):5730.

Chicago/Turabian Style

Maryon Matius; Mohd Ismail; Yan Farm; Adriana Amaludin; Mohd Radzali; Ahmad Fazlizan; Wan Muzammil. 2021. "On the Optimal Tilt Angle and Orientation of an On-Site Solar Photovoltaic Energy Generation System for Sabah’s Rural Electrification." Sustainability 13, no. 10: 5730.

Journal article
Published: 11 February 2021 in Materials Chemistry and Physics
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This work illustrated the preparation of highly dispersive carbonized sawdust by surface functionalization through a facile mild hydrothermal treatment with an aqueous mixture of reactants, potassium persulfate and potassium hydroxide (KPS:KOH), at 160 °C. The dispersion, morphological and purity analyses play an important role in the determination of the optimal hydrothermal process parameters. Dispersion test unveiled well dispersed modified carbonized sawdust's in polar solvent (ethanol) and no significant morphological changes according to the field emission scanning electron microscopy (FESEM) images. The intensity ratio (ID/IG) from the Raman measurement displayed an increased in the modified carbonized sawdust's ID/IG which indicated successful surface functionalization. Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) spectra revealed the introduction of various functional groups onto the carbonized sawdust surface, while the increment in the oxygen and potassium elements percentage (at. %) based on the energy dispersive X-ray system (EDX) supported both FTIR and XPS findings. Carbonized sawdust treated in 1:3 M ratio of KPS:KOH mixture (0.07 M:0.21 M) for 60 min showed the best dispersion in ethanol for at least a month with high degree of functionalization and various oxygen based functional groups were attached on its surface.

ACS Style

Wong Min Jin Karen; J.H. Wong; Zhipeng Wang; Nancy J. Siambun; Willey Y.H. Liew; W.K. Muzammil; K. Sopian; G.J.H. Melvin. Facile mild hydrothermal treatment for surface functionalization of carbonized sawdust. Materials Chemistry and Physics 2021, 263, 124371 .

AMA Style

Wong Min Jin Karen, J.H. Wong, Zhipeng Wang, Nancy J. Siambun, Willey Y.H. Liew, W.K. Muzammil, K. Sopian, G.J.H. Melvin. Facile mild hydrothermal treatment for surface functionalization of carbonized sawdust. Materials Chemistry and Physics. 2021; 263 ():124371.

Chicago/Turabian Style

Wong Min Jin Karen; J.H. Wong; Zhipeng Wang; Nancy J. Siambun; Willey Y.H. Liew; W.K. Muzammil; K. Sopian; G.J.H. Melvin. 2021. "Facile mild hydrothermal treatment for surface functionalization of carbonized sawdust." Materials Chemistry and Physics 263, no. : 124371.

Journal article
Published: 01 February 2019 in Renewable Energy
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Wind turbines in the context of integration in an urban environment are considered as one of the most promising technologies for the efficient diffusion of renewable energy sources. However, situations such as low wind velocity, highly turbulent and skewed wind flow conditions are commonly encountered in this environment. This misaligned flow could affect the horizontal axis wind turbine performance. The vertical axis wind turbine (VAWT) is more suitable to operate under these unfavorable conditions. Nevertheless, the conventional VAWT has low efficiency and poor self-starting characteristics. Therefore, a novel design of deflector integrated cross axis wind turbine (CAWT) is proposed. Tests were carried out to harness wind energy from both the horizontal and vertical components of the skewed flow induced by the deflectors. A semi-empirical approach was also developed to analyze the performance of the CAWT. The aerodynamic behavior of the CAWT was determined by combining the blade element momentum (BEM) model and double multiple streamtube theory (DMST). The approach showed notable agreement between the experimental and theoretical results (9.8% to 14.2% difference). In conclusion, the findings from the experiment and the model showed that the concept has very good potential in the renewable energy industry.

ACS Style

Wen-Tong Chong; Wan Khairul Muzammil; Hwai-Chyuan Ong; Kamaruzzaman Sopian; Mohammed Gwani; Ahmad Fazlizan; Sin-Chew Poh. Performance analysis of the deflector integrated cross axis wind turbine. Renewable Energy 2019, 138, 675 -690.

AMA Style

Wen-Tong Chong, Wan Khairul Muzammil, Hwai-Chyuan Ong, Kamaruzzaman Sopian, Mohammed Gwani, Ahmad Fazlizan, Sin-Chew Poh. Performance analysis of the deflector integrated cross axis wind turbine. Renewable Energy. 2019; 138 ():675-690.

Chicago/Turabian Style

Wen-Tong Chong; Wan Khairul Muzammil; Hwai-Chyuan Ong; Kamaruzzaman Sopian; Mohammed Gwani; Ahmad Fazlizan; Sin-Chew Poh. 2019. "Performance analysis of the deflector integrated cross axis wind turbine." Renewable Energy 138, no. : 675-690.