List of Articles Rai Naveed

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  1 - Steam System Optimization at Palm Oil Mill: Case Study in Sabah, Malaysia
  M D Ibrahim S A Najamudin S S Lam
  10.22094/joie.2022.1951662.1935
  20.1001.1.22519904.2022.15.2.7.7
  In this paper, a preliminary study of industrial steam system reveals that most of the industrial steam user especially the palm oil mill did not bother to save energy as long as the mill meets their productions target and is getting profits for the company. The managem More

  In this paper, a preliminary study of industrial steam system reveals that most of the industrial steam user especially the palm oil mill did not bother to save energy as long as the mill meets their productions target and is getting profits for the company. The management is not aware that a huge amount of energy is being wasted during the processes of extracting oil from the fresh fruit bunch (FFB). To embark this study, Steam System Scoping Tool (SSST), Steam System Assessment Tool (SSAT) and 3E Plus: Insulation Program Software, provided by the United Nations Industrial Development Organization (UNIDO) are used to assess the efficiency of steam system operations. The tools also assist in preliminary assessments of how efficiently the steam system is operating. After analyses are conducted, the proposed improvement project is recommended to modify the system back to its initial designed best efficiency. The results also show that there were various losses that are contributing to the energy waste and its cost impact to the mill. Meanwhile, the boiler efficiency was only about 68.6%. The findings proposed steam system optimization (SSO) opportunities by installing the feedwater economizer and reducing the blowdown rate of the boiler. The efficiency of the boiler was increased to 77% from its current operating condition. This also improved the steam quality and production output of the mill. Through these SSO, the annual demand saving is around 4.9 MW, with an energy saving of 75,276 GJ/yr., capable of reducing 13,002 metric tons of carbon dioxide emissions per annum and save 598.3 Tph/yr of biomass fuel. Thus, through this steam system optimization the estimated annual net cost savings are around USD 100,000.00. This paper aims at promoting similar system optimization projects at other plants throughout Malaysia, as it benefits to all industrial steam user especially the palm oil mill industries in Malaysia. Manuscript profile
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  2 - Electricity theft detection in Power utilities using Bagged CHAID-Based classification Trees
  Muhammad Saeed Mohd. Wazir Mustafa Usman Sheikh Attaullah Khidrani Mohd Norzali Haji Mohd
  10.22094/joie.2022.1941123.1894
  20.1001.1.22519904.2022.15.2.5.5
  Electricity theft and fraud in billing are the primary concerns for Distribution System Operators (DSO). It is estimated that billions of dollars are lost each year due to these illegal activities. DSOs around the world, especially in underdeveloped countries, are still More

  Electricity theft and fraud in billing are the primary concerns for Distribution System Operators (DSO). It is estimated that billions of dollars are lost each year due to these illegal activities. DSOs around the world, especially in underdeveloped countries, are still utilizing conventional time consuming and inefficient methods for Non-Technical Loss (NTL) detection. This research work attempts to solve the mentioned problems by developing an efficient energy theft detection model to identify the fraudster customers in a power distribution system. The key motivation for the current study is to assist the DSOs for their campaign against energy theft. The proposed method initially utilizes the monthly consumption data of energy customers, obtained from Multan Electric Power Company (MEPCO) Pakistan, to segregate the honest and the fraudulent customers. The Bagged Chi-square Automatic Interaction Detection (CHAID) Decision Tree (DT) algorithm is used to classify the honest and fraudster consumers. Furthermore, based on the mentioned metrics, the performance superiority of the Bagged CHAID-based NTL detection method is validated by comparing its efficacy with that of few well-known state-of-the-art machine learning algorithms such as Support Vector Machine (SVM), Artificial Neural Network (ANN) Logistic Regression (LR), Bayesian Network (BN) and Discriminant Analysis. The proposed NTL detection method provides an Accuracy of 86.35% and Area Under Curve (AUC) of 0.927, respectively, which are significantly higher than that of the same for the mentioned algorithms. Manuscript profile
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  3 - Performance Analysis of Remanufacturing System Considering Inspection & Grading Policies, Sourcing Policies and Resource Policies Under Multiple Quality Scenarios: Towards Environmental Sustainability
  Magdalene Andrew-Munot Shirley Jonathan Tanjong
  10.22094/joie.2022.1951658.1934
  20.1001.1.22519904.2022.15.2.6.6
  The aim of this study was to investigate the effect three factors (inspection & grading, sourcing policies and resource policies) on the cycle-time performance of a remanufacturing system under three different quality scenarios. The objectives were to analyse (i) th More

  The aim of this study was to investigate the effect three factors (inspection & grading, sourcing policies and resource policies) on the cycle-time performance of a remanufacturing system under three different quality scenarios. The objectives were to analyse (i) the main effect of factors on the remanufacturing cycle-time under the given three quality scenarios, (ii) the interaction effect between these factors on the remanufacturing cycle-time under the given three quality scenarios; and (iii) the factors and corresponding levels that lead to shortest remanufacturing cycle-time. Simulation technique was used to model and simulate the remanufacturing system. Design of experiment method was used to design a mixed two-level and three-level full factorial for running the simulation experiments. Analysis of variance (ANOVA) was used to analyse the output results from the simulation experiments. The ANOVA results show all three factors have significant effect on the remanufacturing cycle-time, regardless of the quality scenarios. The ANOVA results also suggest that sourcing policies has the most predominant effect when the quality scenario is average. Despite the different quality scenarios, the interaction between sourcing policies and resource policies have significant effects on the remanufacturing cycle-time, with predominant effect when the quality scenario is average. The implications for remanufacturing industry are there must be (i) inspection & grading policies, (ii) sourcing policies and (iii) resource policies, as these factors affect the remanuafacturing cycle-time. This work is novel because it considers three factors simultaneously and carries out the research by using simulation, design of experiment and ANOVA. Manuscript profile
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  4 - Factors Affecting the Efficiency of Hydraulic Flushing in Storm System for Sedimentation Control: A Review
  Geok Teng Leong Charles Hin Joo Bong
  10.22094/joie.2022.1951664.1936
  20.1001.1.22519904.2022.15.2.8.8
  Hydraulic flushing using flushing device is cost effective in removing sediment deposition in sewer system. This technique is especially popular in European countries in controlling sedimentation in closed conduit system. The quick release of large water volume leads to More

  Hydraulic flushing using flushing device is cost effective in removing sediment deposition in sewer system. This technique is especially popular in European countries in controlling sedimentation in closed conduit system. The quick release of large water volume leads to a flush wave under high turbulent flow mimicking dam break phenomenon to flush out the sediment accumulated in sewer. A brief discussion on the factors affecting the efficiency of hydraulic flushing are presented in this paper. These factors can be divided into sewer characteristics, sediment characteristics, flushing device characteristics and environmental factors. Each factor will determine the design of the flush device system. Recommendations of risk assessment techniques that help to establish the failure modes in the sediment flushing system for possible practices, assessing the impact, and planning for corrective actions were also presented. This review would be helpful to support project managers and engineers to establish control plan on the design of hydraulic flushing device for sewer system. Manuscript profile