FACULTY OF ENGINEERING
2011 SEMINAR SERIES
DECEMBER SESSION

TOPIC :  An Insight Into Manufacturing

SPEAKER : Dr Magdalene ak Andrew Munot

Date: 7th December 2011
Time: 2.30 - 3.30
Venue: Dept. of Mechanical & Manufacturing Engineering, Meeting Room, Level 2, Faculty of Engineering

ABSTRACT:

This seminar will introduce and discuss remanufacturing of used-products, which is becoming an important production activity amongst many manufacturers. The major driving factors for such emerging trend are increasingly strict environmental regulations imposed by governmental bodies, growing consumers’ awareness of green environment and potential economical benefits. It has been established that remanufacturing is beneficial to manufacturing companies because it provides the opportunity to generate extra profit, obtain low cost raw materials, produce stock of spare-components and boost companies’ product value. The major remanufacturing process involves inspection/grading, disassembly, components reprocessing and reassembly/testing. Finally, this seminar will introduce and discuss an integrated production and inventory planning simulation model model which has been applied to address production and inventory planning problem in a case study company that specializes in remanufacture of photocopier parts/components. It has been shown that for processing two different quality remanufacturables groups in a RMTS-system, a policy which specifies simultaneous processing utilising dedicated resources provides a better mechanism to achieve a shorter remanufacturing cycle-time. Furthermore, for processing two different quality remanufacturables groups in a RMTO-system, a policy which specifies sequential processing and switching between various quality remanufacturables groups provides a better mechanism to achieve a shorter remanufacturing cycle-time.

 

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FACULTY OF ENGINEERING
2011 SEMINAR SERIES
DECEMBER SESSION

TOPIC :  Peat Research in UNIMAS: (1) Comparison of Triaxial Compression Results on Cement Stabilized Peat in Sarawak, (2) Peat as Fuel

SPEAKER : Dr Siti Nor Linda Taib

Date: 14th December 2011
Time: 2.30 - 3.30
Venue: Dept. of Mechanical & Manufacturing Engineering, Meeting Room, Level 2, Faculty of Engineering

 

ABSTRACT:

 

During the seminar, two different researches on peat performed in Universiti Malaysia Sarawak shall be presented by the speaker. The first section will be on the current geotechnical investigation performed specifically to enhance the strength of this known problematic soil. In the second section, a whole different perspective on peat shall be discussed which is basically performed to further understand the potential of the soil.

Peat is well known as problematic soil due to its high water content, high compressibility and low shear strength characteristics. Studies have been carried out in Universiti Malaysia Sarawak on strength evaluation of stabilized tropical fibrous peat samples from Matang, Sarawak. The stabilizing agent used was Ordinary Portland Cement (OPC). Cemented peat samples were prepared with cement content of 10%, 25% and 50% by weight of dry soil and cured for 7, 14, 28 and 90 days. These stabilized samples were tested for their strength through UCS, UU and CIU triaxial compression tests. From these tests, it was found that as the addition of cement to soil and curing period increased, soil’s stiffness and strength increased in the UCS and UU tests but to a certain limit in the CIU test. It was also found that the UU test results are linearly proportional to UCS tests with R-square of above 0.974. It is expected that the detail information of behavior and properties of peat in Matang can be provided from this research since development in the area is growing.

Fossil fuel depletion is one of the major concerns in the world right now as more and more fossil fuels are consumed each day. From small businesses to large economies, the long-term availability of energy worldwide is paramount to growth and development. Coal was the fastest growing fossil fuel in the year 2003 to 2008. However, coal which is categorized as fossil fuel will deplete soon if the rate of consumption keeps on rising. Therefore, research is done in many parts of the world to replace the usage of fossil fuel with alternative fuel. This paper discusses the potential of Sarawak organic soil - peat as an alternative solid fuel. The effect of various admixtures in pellets and sizes of pellets on calorific value of soil are studied. From the experimental result, pure soil pellet has a gross calorific value of 13.3 MJ/kg at operating moisture content of 20%. In addition, pellet of soil combined with saw dust as admixture has 3% higher gross calorific value compared to pellet of soil with sugar cane husk at the same amount of ash content.

 

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