International Journal of Integrated Engineering
Not a member yet
2309 research outputs found
Sort by
Scheduling of Multiple Energy Consumption in The Smart Buildings with Peak Demand Management
Get PDFThe global energy crisis and the depletion of fossil fuels have become pressing concerns, leading experts to search for alternative solutions. This paper presents an analysis of the day-ahead operation of the multi-carrier energy system (MCES) with the aim of minimizing operational costs, reducing pollution emissions, and maximizing consumers\u27 comfort. The authors propose an optimal scheduling strategy called energy demand curtailment (EDCS), which aims at efficiently managing electrical energy consumption. Additionally, they consider an on-site generation strategy (OGS) for consumers to operate their own energy storages. Both EDCS and OGS are modeled based on demand-side management (DSM). To optimize these strategies and achieve their objectives, fuzzy logic is employed as an optimization approach along with objective functions. Finally, two scenarios are examined through numerical simulations to illustrate the effectiveness of this approach in optimizing energy utilization in MCE
Optimisation of Capacitated Planned Preventive Maintenance in Multiple Production Lines Using Optimisation-in-the-Loop Simulation
Get PDFIn a mass customisation manufacturing system, the production schedule is tailored to the customer\u27s specifications. However, the production system must be accompanied by an effective maintenance program to ensure that the production lines operate as intended. The purpose of this study is to optimise planned preventive maintenance across multiple production lines. An optimised Weibull distribution is proposed to model the machine\u27s Mean Time Between Failures (MTBF), and the total expected maintenance cost is calculated using this distribution, taking into account the probability of the machines remaining operational and failing. Because the optimised Weibull distribution is a continuous distribution, in order to simulate the continuous time domain, it will be divided into several sub-systems and optimised using Bayesian optimisation during simulation. The maintenance scheduling is carried out by considering available time capacity after production scheduling was arranged. The study\u27s findings indicate that the proposed method successfully optimised the planned maintenance schedule without interfering production activity with total cost for the proposed maintenance planning as low as IDR 50.017,75/maintenance unit time
Experimental Investigation On Machining Performance of Ti6Al4V On Electro Discharge Machining Using Stationary and Rotary Electrode
Get PDFTitanium alloys are commonly used in different industries due to its high strength and less in weight. Even though the machinability of titanium alloys is very less, due to its high strength, it becomes more useful in aerospace and medical industries. In this study, the performance of stationary and rotary copper electrodes on machining of Titanium alloy Ti-6Al-4V with Electro Discharge Machining (EDM). Material removal rate(MRR), tool ware rate(TWR) and surface roughness(SR) were analyzed with three controllable input parameters such as pulse on time (Ton), Peak Current(Ip) and Gap Voltage (V). The design of experiment chosen for the experimentation as the Box-Behnken response surface design method. The results are analysed using grey relational analysis(GRA) coupled with firefly algorithm. In both the case of stationary and rotary electrode, it was revealed that gap voltage is significant for overall grey relational grade. The machining performance of Titanium alloy Ti-6Al-4V in the case of rotary mode of electrode is quite better as compare to the stationary mode of operation
Free Vibrational Behavior of Bi-Directional Functionally Graded Composite Panel with and Without Porosities Using 3D Finite Element Approximations
Get PDFAbstract: In the present study, the frequency characteristics of bi-directional functionally graded panels in rectangular planform with and without porosities are examined using 3D finite element approximations. In this work, the graded panel is consisted of metal and ceramic material, in which material properties vary smoothly in two directions. The material properties of this highly heterogeneous material are obtained using the Voigt model via extended power-law distribution of volume fractions. The present model is developed using a customized computer code and discretized using three dimensional solid 20-noded quadrilateral elements. The mesh refinement is carried out to conduct the convergence test and the validation test by comparing the obtained results with the previous reported results. At a later stage, a comprehensive parametric study is conducted through numerical illustrations which reveal that the geometrical and material parameters of bi-directional functionally graded panel affect its frequency characteristics, significantly
Optimization Study on Carbonization of Palm Kernel Shell Using Response Surface Method
Get PDFThe carbonization of Palm Kernel Shell (PKS) was carried out in a constant volume reactor and the optimization of the important factors (Temperature, Particle Size, and Residence time) that affect the quality of the biochar product was investigated using Response Surface Method (RSM-CCD). The characterization results before carbonization show that PKS is a potential biomass to be considered as an alternative for fossil fuel. Center Composite Design (CCD) was employed in the carbonization process to investigate the effect of process parameters on the quality of bio-char formed. The optimized conditions obtained for fixed carbon yield were temperature of 469.16oC, the particle size of mm, the residence time of 17.68 min, and these optimized conditions gave a fixed carbon of 79.65 % with a corresponding yield of 34.00 % while the temperature was observed to be the most influential factor. The optimized conditions were validated and the predicted results were in good agreement with the experimental results, as the relative error between the predicted and experimental values for the fixed carbon and corresponding percentage yield were -1.26 and 0.36 %, respectively. The study revealed the potential of PKS at different particle sizes considered, to be used as solid fuel
Detention Properties of Subsurface Stormwater Modules Under Tropical Climate
Get PDFSubsurface stormwater module is one of the components of a sustainable drainage system. However, the performance of subsurface stormwater module as on-site detention under tropical climate like Malaysia has not been extensively studied in the literature. The current study involves on-site installation of pilot scale subsurface stormwater modules exposed to tropical climate to simulate real conditions to evaluate the detention performance. Rainfall together with the changes in water level and volume of water detained in the installation were observed for six months between April 2021 to October 2021. The subsurface stormwater module used in the current study has a porosity of 94%. It was found that the subsurface stormwater module setup was able to detain between 35.2% to 95.6% of the rainfall volume generated from total rainfall between 11.1 mm to 56.8 mm. The findings can be used as design consideration for using subsurface stormwater module under tropical climate
Preliminary Study On the Function-Defining 3D Surface Roughness Parameters in Tangential Turning
Get PDFThe function-defining three-dimensional (3D) surface roughness parameters (which describe an aspect of the surface quality based on areal topography measurements) are studied on tangentially turned surfaces with different technological parameters in this paper. The 23 factorial design is applied in the planning of experiments. Two levels of depth of cut, cutting speed and feed were chosen for the comprehensive analysis of the tangential turning process. The values of Core Roughness, Reduced Peak Height, Reduced Valley Depth, Skewness and Kurtosis are measured by the application of a 3D areal roughness measurement machine. Equations were determined for the calculation of the studied parameters according to the factorial design method. The results were evaluated in two steps: first the functional parameters derived from the Areal Material Ratio curve were analyzed, then the Skewness and Kurtosis of the assessed area were studied. It is found that a two-fold increase in the cutting speed decreases the Core Roughness Depth, Reduced Peak Height, and Reduced Valley Depth 2-4-fold. The increasing feed rate lowers the presence of inordinately extremes, resulting in a smoother surface. In the point of view of Skewness and Kurtosis, lower cutting speeds and higher feeds are more favorable
Cost-Effective Prosthetic Hand for Amputees: Challenges and Practical Implementation
Get PDFAccording to statistics, approximately 160,000 people in Malaysia, out of the current population of 32 million, need prosthetic or orthotic equipment. For individuals who have experienced upper extremity amputations, significant challenges are posed by the loss of functionality and the desire for a cosmetically appealing solution. To address this issue, a cost-effective prosthetic hand was proposed and developed. An overview of existing prosthetic hands is also offered, with an emphasis on cost-effectiveness, challenges, strengths, and weaknesses. The developed prosthetic hand incorporates a practical and underactuated finger mechanism. It is equipped with controllers based on EMG sensors to ensure that optimal responses are achieved during the grasping and releasing of objects. A suitable motor was carefully chosen to facilitate effective grasping and ungrasping activities. The proposed design was realized using SolidWorks and a 3D Printer. The capabilities of the prosthetic hand were demonstrated through a series of tests involving various objects, including pliers, a screwdriver, and a phone. The results indicate that objects of different sizes and shapes can be effectively grasped and ungrasped by the prosthetic hand. The unique bending angles in each finger result from the way tendons are connected via flexible cords and fishing lines to the servo motor. This design allows for a dynamic response based on the user\u27s muscle flex and strength. The affordability of this cost-effective prosthetic hand demonstrates its potential as a practical and viable solution for amputees aiming to restore their grasping functionalities
Key Challenges and Strategies Towards Sustainable Infrastructure Development in Malaysia
Get PDFThe world is fixated on climate change because of its damage to the environment and the ripple effect it can have on people\u27s health and the economy. This study aims to delve into research focusing on sustainable infrastructure development in Malaysia, as well as the main obstacles and approaches to taking on such a task. This study used a mixed-methods system, which allowed for the collection a large amount of data and made it easy to compare results from different settings. The study found that more people are aware of sustainable impact assessment in infrastructure projects and familiar with resilient, sustainable development than sustainable performance evaluation. The studies also showed that the main problems in implementing sustainability include minimising adverse hazards, financial and budget investment issues, as well as inadequate governance and management. The proposed measures are broken down into monetary, institutional, and organisational themes. Possible steps toward a more sustainable infrastructure involve increasing green investment and financing, fostering green policies and environmental regulations, promoting green technologies and materials, and growing capacity through improved awareness and training. The findings of this study provide construction stakeholders with insight into an analysis of existing methodologies and strategies for integrating sustainable infrastructure development. Resolving obstacles and refining implementation tactics facilitated the effectiveness of the transformation towards a more sustainable infrastructure
Effect of Infilled Walls On The Performance of Steel Frame Structures
Get PDFToday, the subject of a building\u27s resistance to lateral loads is one of the most important concerns of structural engineers. The partitions and infilled walls are non-structural elements that are important due to their effects on the lateral resistance of the building frame. Recently, it has been observed that great damage is occurring to infilled walls, partitions, and buildings in an earthquake-prone area. Infilled walls are effective at increasing the hardness and resistance of building frames, which changes the seismic properties of structures. Therefore, the study of interactions between the structural frame and the infilled walls is essential for a better understanding of structural behaviors. In this paper, the effect of infilled walls is investigated on the behaviour of steel frames using ABAQUS software. Modeling is carried out for different types of infilled materials, including brick and panel, as well as different thicknesses of the infills. It was observed that with an increase in the thickness of infills from 7 to 20 cm, the final capacity and energy absorption increased by 78%. Also, the panel-infilled frames have 18% more capacity and 3.8% more energy absorption than the brick-infilled frame in the same full state. As a result, panel-infilled frames outperform brick-infilled frames in terms of performance.