Daing Mohamad Nafiz Daing Idris

A study on the power generation potential of mini wind turbine in east coast of Peninsular Malaysia

A small-scale wind turbine is an attractive renewable energy source, but its economic viability depends on wind speed. The aim of this study is to determine economic viability of small-scale wind turbine in East Coast of Peninsular Malaysia. The potential energy generated has been determined by wind speed data and power curved of. Hourly wind speed data of Kuantan throughout 2015 was collected as the input. Then, a model of wind turbine was developed based on a commercial a 300W mini wind turbine. It was found that power generation is 3 times higher during northeast monsoon season at 15u2005m elevation. This proved that the northeast monsoon season has higher potential in generating power by wind turbine in East Coast of Peninsular Malaysia. However, only a total of 153.4 kWh/year of power can be generated at this condition. The power generator utilization factor PGUI or capacity ratio was merely 0.06 and it is not technically viable. By increasing the height of wind turbine to 60u2005m elevation, power generatio...

Investigation on wear characteristic of biopolymer gear

Polymer is widely used in many mechanical components such as gear. With the world going to a more green and sustainable environment, polymers which are bio based are being recognized as a replacement for conventional polymers based on fossil fuel. The use of biopolymer in mechanical components especially gear have not been fully explored yet. This research focuses on biopolymer for spur gear and whether the conventional method to investigate wear characteristic is applicable. The spur gears are produced by injection moulding and tested on several speeds using a custom test equipment. The wear formation such as tooth fracture, tooth deformation, debris and weight loss was observed on the biopolymer spur gear. It was noted that the biopolymer gear wear mechanism was similar with other type of polymer spur gears. It also undergoes stages of wear which are; running in, linear and rapid. It can be said that the wear mechanism of biopolymer spur gear is comparable to fossil fuel based polymer spur gear.

Finite element analysis on effects of rim and web thicknesses on root stress of thin-rimmed spur gear with asymmetric web arrangement

Having a lightweight and efficient gear system could improve the efficiency of an engine. The increase of load to over certain limits could end up with the failure to the gear. Special caution needs to be put in consideration for thin-rimmed gears due to the thickness of rim and web. This paper mainly focuses on investigating the effects on root stress of thin-rimmed spur gear with different rim and web thicknesses. There were two different methods used, the analytical method using AGMA standards and the finite element method (FEM). In this study, several sets of thin-rimmed spur gear with different rim and web thicknesses have been simulated in Abaqus software as FE model for further analysis. Von Misses stress value has been obtained with different values of tangential force that have been applied to the gear. Based on the results, a constant increase of root stress values was recorded when the thickness of rim being reduced. The asymmetric web arrangement of thin-rimmed spur gear cause the root stress ...

Design and Analysis of Tooth Impact Test Rig for Spur Gear

This paper is about the design and analysis of a prototype of tooth impact test rig for spur gear. The test rig was fabricated and analysis was conducted to study its limitation and capabilities. The design of the rig is analysed to ensure that there will be no problem occurring during the test and reliable data can be obtained. From the result of the analysis, the maximum amount of load that can be applied, the factor of safety of the machine, the stresses on the test rig parts were determined. This is important in the design consideration of the test rig. The materials used for the fabrication of the test rig were also discussed and analysed. MSC Nastran Patran software was used to analyse the model, which was designed by using SolidWorks 2014 software. Based from the results, there were limitations found from the initial design and the test rig design needs to be improved in order for the test rig to operate properly.