Development Of Performance Standard For Circular Ducting Local Exhaust Ventilation System At Workplace

Engineering controls, such as local exhaust ventilation (LEV) system, are functioned to remove contaminants from work place, as it is vital that the level of contaminants must comply with legislation. Furthermore, LEV in industries has been designed, fabricated, and monitored to perform better in accordance to the American Conference for Governmental Industrial Hygienists (ACGIH) standard and the Guideline on LEV provided by Department of Occupational Safety and Health (DOSH). This study on LEV had been depicted from the Industrial Hygiene Technician assessment report due to issues on the effectiveness of LEV to remove contaminants. That includes problem of assessing, measuring the fan area, as well as the material fabricated. Thus, the objective of the study was to identify the current compliance of the national law with regards to LEV system. Moreover, besides determining the usage of ducting in LEV by looking into the characteristics of the material using American Society for Testing and Materials (ASTM) standard, the performance of LEV system was tested, as suggested in the ACGIH standard, through design, construct, and measurement data. Three different models (in laboratory scale model) of LEV system were designed according to the ACGIH Standard, and tested to determine the relationship between analytical, experimental, and numerical analyses in this study. As for the three models, they were designed and fabricated to measure velocity and flow of air. Meanwhile, as for numerical analysis, computer simulation i.e. Ansys CFX, Engineering Simulation Software version 14.0 (Ansys 14.0) was used to simulate these three models for verification and comparison. A comparative study was conducted to retrieve analytical, experimental, and simulation results to justify the performances of LEV on different velocity and static pressure values. The results showed that there was insignificant difference between the values of velocity that were calculated, measured, and simulated. The average difference for velocity data was 8%. Static pressure for analytical and experimental results also portrayed insignificant difference compared to simulation that was mostly influenced by the mesh of variable setting. The outcome of the study was to produce the Malaysian Standard on LEV system design, fabrication, measurement, and maintenance. The development of LEV Malaysian Standard through Standard and Industrial Research Institute of Malaysia (SIRIM) Berhad that proposes the evaluation of LEV performance should be carried out before any LEV system is developed due to cost consideration, besides benefiting employees and employers for their safety and health, and in preventing occupational diseases in the future

Design of Local Exhaust Ventilation for Spray Booths: Proposed Study

Workers are exposed to contaminant at workplace. Employers in Malaysia shall comply with Factories and Machineries Act 1967 and Occupational Safety and Health 1994 to minimize the exposure that hazardous to workers health. Engineering control such as to provide Local Exhaust Ventilation (LEV) is to control contaminant to the employees. This report is a research proposal to carry out for Local Exhaust Ventilation study at Automobile Assembly Plant in Malaysia focusing in spray paint to look on current design and purpose new design and advanced material to the system. Data collections are based on survey questionnaires, chemical monitoring, LEV inspection, testing and examination. Expected results are comparison from experimental, analytical and finite-element used in automotive industries prediction of advanced material will propose to the systems

Local Exhaust Ventilation and Application: A Review

The industries that are involved in the production of dangerous chemicals requires Local Exhaust Ventilation (LEV) for separating employees to hazards. LEV purpose is to separate contaminants from the source it generated. The objective of this paper is to look at a number of studies related to the LEV and its applications. The discussions are divided to several parts such as application in construction industries, buildings, manufacturing industries, workshops and paint manufacturers. Ongoing monitoring, maintenance and effective personal protective equipment (PPE) are necessary to ensure the spray booths can be managed properly and avoid employee exposure to contaminants. Ventilation design in buildings, equipment selection and use of Computational Fluid Dynamics (CFD) is highly suggested in that application. There are no exposures to hazardous materials to the building users in the construction of hospitals and others. Use of push-pull ventilation method is an efficient. The future phase of ventilation system in airplanes and hawker centre will be the consumer's attention

Baseline Inspection and Measurement of Local Exhaust Ventilation (LEV) Systems at Spray Booth in Manufacturing Plant

Examination and testing of local exhaust ventilation systems (LEV) that was conducted could help the management to create base or annual performance measurement in industry operations.The LEV will also be verified compliance with original design data, in order to determine adequate of transport velocities are being maintained. The examination also to determine if additional exhaust hoods can be added to the existing systems and compliance with Occupational Safety and Health (OSH) regulations.This Examination is to obtain the necessary data such as airflow static pressure, speed and total pressure at appropriate points LEV system. The method used is to inspect, analyze and evaluate the performance of local exhaust ventilation systems and related components, evaluate and recommend necessary measures for the restoration or repair of the damage.LEV also need to carry out inspection and tested by a registered professional engineer after construction and installation to demonstrate that the equipment meets the design specifications.Methodology for measurement and testing were based on American Conference of Governmental Industrial Hygienist (ACGIH). Selections of testing points for fume hood and canopy hood with individual suction fan, face velocities were measured and where applicable and accessible, duct transport velocities and static pressure measurements were carried out. Results from measurement data obtained is 65 fpm face velocity and flow rate 6500 fpm is lower than the value proposed by the ACGIH and show spray booth is not able to bring out the contaminants out of the workplace. The LEV systems has been examined and tested; both spray booth number1 and number 2 was below the ACGIH Standard while measurement and inspections conducted and not comply with local legislation to protect workers safety and health

Data Comparison on Fumes Local Exhaust Ventilation: Examination and Testing Compliance to USECHH Regulation 2000

The paper focused on the examination and testing of local exhaust ventilation (LEV) systems at one of Electrical Company to check the transport velocity whether it meet the recommended American Governmental Industrial Hygienist (ACGIH) Standard. The industrial hygiene approaches, AREC (Anticipating, Recognize, Evaluate and Control) were adopted in this study. This is to ensure that the LEV system installed has the optimum efficiency to extract out the contaminants from the workstation. Objective of this study is to make comparison with previous and current monitoring data. The efficiency and the other parameter measured will be the main source to analyze for the particular applications. The differential of data was discussed and several recommendations are proposed to make sure the LEV system performance is excellent

MODIFIED NONLINEAR MODEL FOR EXPONENTIAL GROWTH METHOD AND ITS APPLICATION IN BIOSTATISTICSS USING SAS

This paper supplied an alternative method for exponential growth modeling as a technique for regression analysis through SAS algorithm. This alternative method is a combination technique (using bootstrap and fuzzy regression for nonlinear model) for the small data set and gives the researcher an option to launch the analysis even there is not enough data set. This method current method improves the previous methodology with embedded bootstrapping and fuzzy technique to the step of nonlinear regression model. The aim of this principle is to propose an alternative method of doing analysis with better improved results. In our case, we applied this principle to the agriculture data and the gained results were compared by looking at the average width of predicted interval

Assessing the level of safety Knowledge-Attitude-Behaviour (Safety KAB): A case study in a public cleansing firm

In Malaysia, the utility sector, including public cleaning service, has relatively high accident cases recorded in recent years. Exposing to various type of hazards, the workers need to maintain their safety behaviour to prevent workplace accidents. As safety behaviour is found to become the leading factor to work-accidents, this research proposed to examine the level of safety knowledge-attitude-behaviour (safety KAB), plus the effect of safety knowledge and safety attitude on safety behaviour amongst workers in a public cleansing company in the southern region of Malaysia. The present research is a quantitative study involving a cross-sectional design which 313 sets of a questionnaire were distributed and answered by to workers who involve in solid waste collecting, and public cleansing works from Company X. The level of safety KAB was determined by the mean values derived from the descriptive analyses, while the direct effect to the variables was tested using PLS-SEM modelling. The results indicated that the level of safety attitude and safety behaviour is high, whereas safety knowledge is at a moderate level. These findings indicated the positive results of safety intervention conducted by the government towards Company X as well as the initiative programs conducted by the company.Furthermore, the PLS-SEM analysis determined that safety attitude and safety knowledge had a significant effect on safety behaviour. Hence, the present research suggests an alternative structural model, which deemed appropriate for Malaysia’s public cleansing organizations, and offers a predictive model of safety knowledge, safety attitude, and safety behaviour for future research. Lastly, the outcomes of this study are also hoped to serve as a useful reference to the related industry for elevating safety KAB among the workers

Examining The Effect of Safety Leadership Towards Safety Behaviour Amongst Domestic Collecting Workers in Malaysia

Safety leadership is increasingly being championed as the preeminent strategy for mitigating workplace injuries through the improvement of safety behaviour. This reearch rigorously investigates the interplay between supervisory leadership and safety behaviour among employees involved in domestic waste collection. Drawing on the Social Exchange Theory (SET), the study elucidates how these three aspects of safety leadership function as pivotal mechanisms in fostering safer workplace behaviours within this high-risk sector. A quantitative cross-sectional survey, targeting 224 domestic waste collecting workers, was utilized, and data analysis was conducted using Partial Least Squares Structural Equation Modelling (PLS-SEM). This results uncover the profound influence of safety leadership dimensions, namely safety coaching, safety concern, and safety monitoring, on safety behaviour among domestic waste collecting workers in Malaysia. This illuminates the vital role of multifaceted safety leadership in reducing workplace accidents and injuries. This study contributes valuable insights for industry practitioners, safety leaders, and policymakers, supporting their efforts to enhance safety standards in the waste collection sector. The findings pave the way for improved safety practices of the workforce within high-risk industries

Local Exhaust Ventilation: PAST, PRESENT, and FUTURE

Engineering control is a method of controlling the risk of exposure to contaminants. Health effects to industrial workers are more severe whilst high exposure and time exposed to contaminants at workplace. Installation of industrial ventilation or local exhaust ventilation (LEV) system is the proposed method to reduce the risk. This paper discusses the past, present and future relating to LEV system in Malaysia. Current issues related to monitoring reported by Hygiene Technician in compliance with Occupational Safety and Health (Use of Standard Chemical Hazardous to Health Regulation 2000) carried out in several states in Malaysia as a sample. The nanotechnology is a new area at present and future. The involvement of government, employers and employees need to be justified due to the attention to prevent and control of any exposure. It is suggested that using the Computational Fluid Dynamic (CFD) simulation, a new design of LEV system can be upgraded and predicted