Effect of number of baffles on flow and pressure drop in a shell side of a shell and tube heat exchangers

The effect of number of baffles on flow and pressure drop on a shell side of shell-andtube heat exchangers was studied. In the present study, a set of CFD simulations using FLUENT version 17.0 from ANSYS were used to analyze the flow in the single shell and single tube pass heat exchangers consists of 20 mm diameter of tubes in staggered configuration with a variable number of baffles. The simulations were undertaken to inform on how the fluid flowed within the shell side of shell-and-tube heat exchangers. The results show that the variable number of baffles and baffle spacing in a heat exchanger strongly affect the flow pattern and pressure drop. This is consistent with other published data

Effect of number of baffles on flow and pressure drop in a shell side of a shell and tube heat exchangers

The effect of number of baffles on flow and pressure drop on a shell side of shell-andtube heat exchangers was studied. In the present study, a set of CFD simulations using FLUENT version 17.0 from ANSYS were used to analyze the flow in the single shell and single tube pass heat exchangers consists of 20 mm diameter of tubes in staggered configuration with a variable number of baffles. The simulations were undertaken to inform on how the fluid flowed within the shell side of shell-and-tube heat exchangers. The results show that the variable number of baffles and baffle spacing in a heat exchanger strongly affect the flow pattern and pressure drop. This is consistent with other published data

The flow behaviour study of splitting device for horizontal pipeline

The study of the flow behaviour of splitting device for horizontal pipeline was conducted by using the numerical simulation. The splitting device is functionally to force the roping flow to become homogenous. The study scrutinised the air flow in the pipeline, and also the air flow with particle which is anthracite injected into air in the pipeline. A piping system with 5 different type of splitting device is simulated to find the best splitting device that can make the roping flow become homogenous and improved the roping problem. The simulation was conducted by using the Ansys Fluent. From this study, it can be concluded that the splitting device, does help successfully in reducing the roping problem in the horizontal pipeline

The numerical modelling of falling film thickness flow on horizontal tubes

This paper presents a computational modelling of water falling film flowing over horizontal tubes. The objective of this study is to use numerical predictions for comparing the film thickness along circumferential direction of tube on 2-D CFD models. The results are then validated with a theoretical result in previous literatures. A comprehensive design of 2-D models have been developed according to the real application and actual configuration of the falling film evaporator as well as previous experimental parameters. A computational modelling of the water falling film is presented with the aid of Ansys Fluent software. The Volume of Fluid (VOF) technique is adapted in this analysis since its capabilities of determining the film thickness on tubes surface is highly reliable. The numerical analysis is carried out under influence of ambient pressures at temperature of 27ºC. Three types of CFD numerical models were analyzed in this simulation with inter tube spacing of 30 mm, 20 mm and 10 mm respectively. The use of a numerical simulation tool on water falling film has resulted in a detailed investigation of film thickness. Based on the numerical simulated results, it is found that the average values of water film thickness for each model are 0.53 mm, 0.58 mm, and 0.63 mm

A study on the impact of international academic visit exchange programme among chemical engineering students

Universiti Teknologi Malaysia (UTM), through a Global Outreach Programme (GOP) has been encouraged UTM students to go oversea on exchange programme for a period of their study. The objective of this program is mainly to globalise students' educational experience by adding an international dimension to their degree. This study was done to bring clarity to the role of exchange and advantages program which in line with UTM academia learning aspiration. This study specifically accessed the advantages gained among Chemical Engineering student from an exchange program between UTM and Hanoi University of Mining and Geology, Vietnam (HUGM). Data were collected via qualitative method through collecting reflective journals written by all students participated in this exchange programme. Using thematic analysis, the result demonstrates that a period of study abroad with different culture has brought benefits to the majority of UTM and HUMG students. Among the major positive outcomes appeared to be an improved personal development and intercultural competencies and enhancement of professional skills for careers. This program also encouraged high level of continuous contact and international networking from both universities. Most students participated in this program had showed their appreciation on this unique experience of travelling abroad

Development of empty fruit bunch filter with addition of chitosan for pre-treament of palm oil mill effluent

The separation performance of empty fruit bunch (EFB) filters with addition of chitosan on the pre-treatment of palm oil mill effluent (POME) has been investigated. Chitosan is an adsorbent which has been used widely in the wastewater treatment. A relatively EFB filters with various concentration of chitosan added and different length of fibers were prepared in order to find the most efficient filter. The performance was assessed in terms of chemical oxygen demand (COD), pH and total suspended solids (TSS) reduction. The results obtained showed that the percentage of reduction of the COD, pH and TSS increased as the concentration of chitosan increased and the length of the fibers shorter. The filter made of 6mm fibers and mixed with 4wt% of chitosan yielded the highest percentage of COD, pH and TSS reduction of25.92%, 26.05 and 49.19% respectively

Instilling professional skills and sustainable development through problem-based learning (PBL) among first year engineering students

Developing sustainable development (SD) mindset and professional skills, such as problem solving, team working and communication skills, are crucial for engineering graduates of the 21st Century. Cooperative Problem Based Learning (CPBL), which is the infusion of Cooperative Learning (CL) principles into the Problem-Based Learning (PBL) cycle, had been shown to enhance learning while developing the desired professional skills and positive behavior. This paper describes a mixed method study on the impact of an Introduction to Engineering course on first year students as they go through three cycles of CPBL to solve a sustainability related problem. In the first part of the research, anexploratory studywas conducted by analyzing reflective journals submitted by the students at the end of each CPBL cycle using thematic qualitative data analysis technique to determine the major themes in skills developed. The analysis show strong emergence of professional skills and SD. To determine the level of behavior change in SD for students who took the course, a quantitative study was then conducted. Although the students initially faced difficulties in developing the skills, by the end of the third stage, the students realized that they have managed to attain important skills and SD behavior essential as engineers of the future

The introduction to engineering course: a case study from University Teknologi Malaysia

As part of an effort to enhance students' first year experience, all Chemical Engineering students in Universiti Teknologi Malaysia are required to take the Introduction to Engineering course. This course is designed to stimulate students’ passion and strengthen motivation for further engineering studies, as well as to enhance their technical knowledge and relevant professional skills. To investigate the impact of the course on students’ knowledge of engineering, an exploratory study is conducted through an open-ended survey, given at the beginning and end of the semester. The analysis shows that the ITE course successfully served the purpose of raising awareness about engineering profession among students, while motivating them through student-centred learning approaches. A qualitative study is also conducted by analysing reflection journals submitted by students to identify the improvement on professional skills that students have developed as they go through the course. This study concludes to show that first year engineering students who have gone through the activities in the course have understood the role of engineers and their job functions. They have also managed to develop professional skills as part of their initial journey to become good engineers

Inculcating sustainability among first-year engineering students using cooperative problem-based learning

Education for sustainable development (ESD) is a major concern for the 21st century society. In engineering education, the importance of ESD is translated in the Washington Accord by making it a requirement for accreditation of engineering programs. In this chapter, we describe the design and implementation of cooperative problem-based learning (CPBL) in inculcating sustainability among engineering students. CPBL is the infusion of cooperative learning principles into the problem-based learning (PBL) cycle to support students in developing the desired outcomes. Students are given a problem on sustainable development in three stages to gradually challenge them with increasing difficulty, while systematically providing the necessary support to scaffold their learning through the CPBL cycle, as they develop the skills to successfully go through the process and solve the problem. Based on an implementation and study on first-year chemical engineering students, there was a significant increase in sustainability knowledge and behavior among students after undergoing the CPBL learning environment