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Articles 1 - 5 of 5
Full-Text Articles in Mechanical Engineering
Simulation Of Unsteady Heat And Mass Transport With Heatline And Massline In A Partially Heated Open Cavity
Faculty of Engineering University of Malaya
A computational work is performed to investigate the transient heat and mass transfer inside a ventilated enclosure. The enclosure has two ventilation ports as inlet and outlet. Three different configurations are tested according to location of outlet ports while location of inlet port is fixed. In case 1, the outlet port is located on the top of the left vertical wall, in case 2 at the right and case 3 at the middle of the ceiling. Finite element method is employed to solve the governing equations of flow, heat and mass transfer. Also, the heatline and massline techniques are used …
Study On Coarsening Of Ag3sn Intermetallic Compound In The Fe-Modified Sn-1ag-0.5cu Solder Alloys
Study On Coarsening Of Ag3sn Intermetallic Compound In The Fe-Modified Sn-1ag-0.5cu Solder Alloys
Faculty of Engineering University of Malaya
The present study focuses on coarsening of Ag3Sn intermetallic compound in the Sn-1Ag-0.5Cu and Fe-modified Sn-1Ag-0.5Cu solder alloy. The investigations showed that the Ag3Sn intermetallics coarsened rapidly in the Sn-1Ag-0.5Cu solder alloy whereas the Ag3Sn intermetallics were found to be quite stable in the Fe-modified Sn-1Ag-0.5Cu solder alloy. The lattice strain in the Ag3Sn intermetallics and the blocking effect on Ag diffusivity in Sn matrix suggested the possible mechanisms for the coarsening suppression of the Ag3Sn intermetallics in the Fe-modified solder alloy. (C) 2014 Elsevier B.V. All rights reserved. Link to Full-Text Articles : http://www.sciencedirect.com/science/article/pii/S0925838814024621
Effective Utilization Of Excess Energy In Standalone Hybrid Renewable Energy Systems For Improving Comfort Ability And Reducing Cost Of Energy: A Review And Analysis
Faculty of Engineering University of Malaya
One of the features that characterize renewable energy sources is their variability and intermittency. Intermittency covers both the predictable and unpredictable variations of their power outputs and uncertainty in the power availability. To overcome the drawback of intermittency, special design considerations should be taken into account. These additional design considerations increases the overall cost of the renewable energy systems. Adding storage system and/or backup source to the renewable sources is one of the measures used to guarantee the continuity of power supply to the loads, and therefore improve the reliability of the renewable energy systems. The operation of renewable energy …
Fabrication And Characterization Of Microstacked Pzt Actuator For Mems Applications
Fabrication And Characterization Of Microstacked Pzt Actuator For Mems Applications
Faculty of Engineering University of Malaya
A microstacked PZT actuator of dimensions 8 mmx 0.8 mm x 0.4 mm and capable of 2.3-mu m actuation under a voltage of 100 V was fabricated and characterized. This actuator was then integrated into a silicon microstage with dimensions of 20 mm x 20 mm x 0.4 mm requiring actuation by a miniaturized actuator. The microstage was designed containing a Moonie amplification mechanism in order to further amplify the actuation of the stacked PZT actuator. Experimental characterization of the microstage performance indicated that the combination of a stacked PZT actuator with the Moonie amplification mechanism was successful in enabling …
A Review Of Safety, Health And Environmental (She) Issues Of Solar Energy System
A Review Of Safety, Health And Environmental (She) Issues Of Solar Energy System
Faculty of Engineering University of Malaya
Solar energy is one of the cleanest forms of energy sources and considered as a green source of energy. Solar energy benefit ranges from low carbon emission, no fossil fuel requirement, long term solar resources, less payback time and other. However like other power generation sources, solar energy has also some Safety, Health and Environmental (SHE) concerns. This paper presents the overview of solar energy technologies and addresses the SHE impact of solar energy technologies to the sustainability of human activities. This paper will also recommend the possible ways to reduce the effect of potential hazards of widespread use of …