Papers by Ts. Dr. Choong Guan
Quality Improvement of Small Form-Factor Pluggable (SFP) Units Assembly Using Robotic Automated System
SpringerBriefs in applied sciences and technology, Dec 31, 2022
IOP conference series, Jul 10, 2020
Synthesis of graphene foam for solar water evaporation
Nucleation and Atmospheric Aerosols, 2021
Solar vapor generation is emerging as a reliable way to directly transfer solar irradiation to wa... more Solar vapor generation is emerging as a reliable way to directly transfer solar irradiation to water evaporation. Graphene-based porous photothermal materials are considered as promising absorbers in this system owing to the broadband absorption and excellent photothermal properties. In this paper, a three-dimensional (3D) graphene foam with self-foaming method for solar vapor generation was produced. Abundant porous channels and a hydrophilicity effect are simultaneously achieved by foam formed. The result shows that graphene foam 3.00 wt% at 30 min stirring time can be achieved highest solar water evaporation at 278% compared to foam without GnPs loading at same stirring time. The FESEM detected more porous channels appears at 3.00 wt.% GnPs loading foams.
Journal of Design Communication and Technology in Education, Sep 29, 2018
The concept of this oil filter gripping socket is based on the current situation at the workshops... more The concept of this oil filter gripping socket is based on the current situation at the workshops especially in automotive maintenance related work. The aim of the paper is to design a tool that can help to facilitate in installation and removal of oil filter from cars. The designed tool could be used to install and remove oil filter with ease, in order to increase safety and handling performance of craftsmen. Problem occurs during installation and removing the oil filters from cars as sometimes the oil filter is stuck and could not be removed by hand. Hence, this tool helps to remove it but sometimes changing the oil filter by using the wrench is also troublesome due to the oily condition of the oil filter. A questionnaire has been designed and distributed to ten workshops and craftsmen to test the capability and the effectiveness of the tool. The responds given were great but several improvements were also suggested. Furthermore, it is hard to find suitable tool that can use to open different sizes of oil filter due to different cars have different sizes of oil filter. This tool was designed with better and sustainable material, and with smoother and better mechanism to overcome the problem stated and function more efficiently.
Journal of Engineering, Communication and Technology in Education, Sep 29, 2018
The Law of Conservation of Energy has stated that energy can neither be created nor destroyed, bu... more The Law of Conservation of Energy has stated that energy can neither be created nor destroyed, but the energy can be converted from one form to another form. Besides, the law also stated conserved energy loss over time, which means the energy loss in every second. Energy conservation is efforts made to consume lesser energy, while increase the efficiency of converted energy or reduce the amount of services used. In this project, magnetic-drive (magnetic energy transmission) was used as power transmission method instead of using belt drive and chain drive. In theoretical, magnetic energy provides no friction when it is used to convert to another form of energy. To test out the efficiency of this power transmission method easily, DC motor generator was used. The recorded results were based on the output of DC motor generator. Then, different numbers of permanent magnet was used to test out the driven and driver disk. The most stable output power transmission of magnetic-drive was 9 small magnets in both drive and driven disks. Both disks' magnets were built to repulse each other at 90 degrees. All the material used in this experiment were insulated (except electrical and electronic devices), to avoid the charge in conductor which may cause by the change of magnetic field.
Techno-economic Assessment of Turbine Inlet Air Cooling for Cogeneration Plant in Malaysia Climate
IOP Conference Series: Earth and Environmental Science, 2018
Synthesis of graphene foam for solar water evaporation
AIP Conference Proceedings, 2021
Solar vapor generation is emerging as a reliable way to directly transfer solar irradiation to wa... more Solar vapor generation is emerging as a reliable way to directly transfer solar irradiation to water evaporation. Graphene-based porous photothermal materials are considered as promising absorbers in this system owing to the broadband absorption and excellent photothermal properties. In this paper, a three-dimensional (3D) graphene foam with self-foaming method for solar vapor generation was produced. Abundant porous channels and a hydrophilicity effect are simultaneously achieved by foam formed. The result shows that graphene foam 3.00 wt% at 30 min stirring time can be achieved highest solar water evaporation at 278% compared to foam without GnPs loading at same stirring time. The FESEM detected more porous channels appears at 3.00 wt.% GnPs loading foams.
IOP Conference Series: Materials Science and Engineering, 2020
Young coconut shell and husk shredder machine is designed for shredding the husks after the proce... more Young coconut shell and husk shredder machine is designed for shredding the husks after the process of coconut shell crushing. The main objective of this machine is to reduce coconut shell waste after the completion of harvest. The machine contains of two shafts of 25 blades per shafts (1st stage) and another two shafts of 30 blades per shaft (2nd stage) placed side by side in order to put pressure on the coconut shell and husk during the cutting process. At stage 1, which is the shredding stage, it has 2 shafts which both rotate in the opposite direction. The blades have bigger surface area, thick, hard-faced cutting surfaces and run in low rotation per minute (rpm) in order to crush the coconut shell and husk. At stage 2, which is the cutting stage, it consists of 2 shafts which rotate in the opposite direction and each shafts consist of 30 blades. The blades in stage 2 is thinner compared to the blades in stage 1, sharp cutting edge and the distance from each blades are closer to...
IAFOR Journal of Sustainability, Energy & the Environment, 2016
Industrial practitioners and policy makers in the Malaysian palm oil industry are now focusing on... more Industrial practitioners and policy makers in the Malaysian palm oil industry are now focusing on understanding the factors that influence sustainability of palm oil supply chain network involving the fundamental principle of triple bottom line of social, environmental, and economic performance impacts of supply chain network design. In order to achieve sustainable products, an interpretive structural modelling approach method was used to better understand the drivers related to environmental sustainability reporting in the supply chain network related to the Malaysian palm oil industry. This paper has identified nine (9) environmental sustainability drivers (environmental management, life cycle assessment, green labelling, GHG emissions, climate change, energy efficiency, renewable resources, water, soil and air quality and lastly waste management) and the relationships between them. The findings from the environmental sustainability reporting drivers of this study can be furthered use to explore the potential impacts of supply chain network design on sustainability using the Malaysian palm oil industry as a reference. The novelty of this research is that it identifies the significance of environmental sustainability reporting based on the analyzed drivers and provides evaluation of environmental sustainability criteria's. This paper has provided a structural model of environmental sustainability and its associated method was developed by using the interpretive structural modeling model to determine the potential drivers in environmental sustainability reporting.
International Journal of Vehicle Structures and Systems, 2011
For decades, it has been a challenging task for brake engineers to reduce or totally eliminate sq... more For decades, it has been a challenging task for brake engineers to reduce or totally eliminate squeal that emanates from brake systems. Despite the large number of proposals that have been implemented in tackling disc brake squeal, very few solutions are totally effective to reduce or suppress it. This paper presents an approach to tackle disc brake squeal through chamfered and slotted pad. A three-dimensional FE model of an actual disc brake system is developed. The baseline FE model is first simulated using complex eigenvalue and transient analysis to predict squeal and compared to the squeal tests data obtained in the brake dynamometer. A reasonable correlation is found between these results. Then, three different pad modifications are proposed, simulated and tested. It is shown that pad with chamfers and diagonal slot can totally suppress squeal both in prediction and squeal test.
Design and Fabrication of a Dip Immersion Probe for Melting and Pouring Practice in Casting Technology
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Papers by Ts. Dr. Choong Guan