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Articles by Cheah Meng Ong
Total Records ( 3 ) for Cheah Meng Ong
  Kiam Beng Yeo , Rosalam Sabatly , Wen Yee Hau and Cheah Meng Ong
  This study presents the investigation of marine propeller hydrodynamic performance and parameters through Computational Fluid Dynamic analysis. Propellers with different Pitch to Diameter (P/D) ratio, propeller blade number (Z), skew angle, rake angle and Expanded Area Ratio (EAR) were subjected to computational flow analysis based on the Reynolds Averages Navier-Strokes Equation-(RANSE) solver. Results found that all thrust coefficient (KT) and torque coefficient 10 (KQ) decreases with the increasing advance coefficient (J). The efficiency of propeller performance had also consistently showed characteristic trend of nonlinear increases to a peak an optimum value before decreasing drastically with increasing J value. The analysis found that no single marine propeller achieve optimum performance in thrust, torque, efficiency and velocity with less loading on the mechanical properties.
  Kiam Beng Yeo , Kenneth Tze Kin Teo and Cheah Meng Ong
  Single slope solar still utilizes solar distillation technology to clean water from brackish water was investigated. The clean water output of solar still depends on the intensity of sunlight and how well the different mediums in solar still transfer the heat energy around. Thus, the temperature distribution in the single slope solar still was analysed using the explicit finite difference method. Side view of solar still is aligned with a mesh system, which accommodates nodes and specific equation to calculate the temperature at the next time-step for every derived node. Simulation result showed the trend of heat transfer process developing from the basin of solar still to the glass cover and the temperature recorded was about 65°C during 4 h of simulation time.
  Kiam Beng Yeo , Cheah Meng Ong and Kenneth Tze Kin Teo
  Single slope solar still absorbs the thermal energy from sunlight to distillate polluted water into clean water in an enclosed space. Principal of heat transfer and energy balance were the governing equations for the operation of single slope solar still. A mathematical model was developed to express these thermodynamics behaviours. In the model, critical parameters had been identified, such as slope angle of glass cover, mass of water in basin and wind speed. Simulation had been carried out and results revealed the importance of the slope angle matching the latitude of the experimental location, the increasing of water mass in the basin leading to decreasing of clean water production and the presence of wind speed also increase the output only when the sunlight is still sufficient.
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