WorldCat Identities

Chowdhury, Ashfaque Ahmed

Overview
Works: 22 works in 30 publications in 1 language and 190 library holdings
Genres: Conference papers and proceedings 
Roles: Editor, Author
Publication Timeline
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Most widely held works by Ashfaque Ahmed Chowdhury
Application of thermo-fluid processes in energy systems : key issues and recent developments for a sustainable future by M. Masud K Khan( )

8 editions published between 2017 and 2018 in English and held by 168 WorldCat member libraries worldwide

This book provides essential information on and case studies in the fields of energy technology, clean energy, energy efficiency, sustainability and the environment relevant to academics, researchers, practicing engineers, technologists and students. The individual chapters present cutting-edge research on key issues and recent developments in thermo-fluid processes, including but not limited to: energy technologies in process industries, applications of thermo-fluid processes in mining industries, applications of electrostatic precipitators in thermal power plants, biofuels, energy efficiency in building systems, etc. Helping readers develop an intuitive understanding of the relevant concepts in and solutions for achieving sustainability in medium and large-scale industries, the book offers a valuable resource for undergraduate, honors and postgraduate research students in the field of thermo-fluid engineering
Modelling and analysis of air-cooled reciprocating chiller and demand energy savings using passive cooling by Ashfaque Ahmed Chowdhury( )

2 editions published in 2009 in English and held by 2 WorldCat member libraries worldwide

The study presents modelling and analysis of air-cooled chiller system in an office building at Central Queensland University in Rockhampton, Australia. EnergyPlus, building energy simulation software, has been used to model and to simulate the energy savings. Base case cooling energy has been compared with measured data. The simulated results show a reasonable agreement with the measured data. As a passive cooling means, the effect of economiser usages and pre-cooling have been simulated and analysed to assess annual demand savings for an energy intensive office building at Rockhampton, Australia. It was found that implementation of the pre-cooling and economiser system could save 115 kW/m2/month and 72 kW/m2/month total cooling energy and 26 kW/m2/month and 42 kW/m2/month chiller energy, respectively
Thermodynamic processes and characterisation of dead burned magnesia : a review by Ashfaque Ahmed Chowdhury( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

In magnesia plant, annular vertical shaft kilns - high temperature processing units, are used for the production of dead burned Magnesia. Vertical Shaft kilns such as those operating at the reference magnesia plant are known to be efficient. However, the knowledge of thermal processes and physical behaviours inside the operating kiln has not yet been studied in detailed. This is mainly due to the high working temperature inside the kiln which makes temperature and pressure measurements very difficult and expensive or almost impossible. The inability to obtain such information has limited the optimisation of the kiln's process variables. With increasing knowledge and computing power, computational modelling is becoming a readily used resource for improving processes that occurs in a vertical shaft kiln. This study represents the review of the thermodynamic processes of dead burned magnesia production with an integrated view to improving energy efficiency of magnesia production and to achieve environmental sustainability
Integration of project based investigation into an undergraduate fluid mechanics course for research and teaching excellence by Ashfaque Ahmed Chowdhury( )

1 edition published in 2009 in English and held by 1 WorldCat member library worldwide

The aim of the integration of project based investigation into an undergraduate fluid mechanics course is to involve students with real life engineering problems and to enhance the students technical knowledge and problem solving skills. The classroom teachings, laboratory experiences and work on an engineering fluids project have been designed so that the students receive a broad range of introductory exposure to fluid mechanics with relevant applications of the theory. This paper highlights an overview of the course curriculum and assessment procedures for achieving excellence in teaching and research. It is anticipated that the students will be competent to make use of the advanced knowledge gained in this course in their professional career
Application of project based study in the learning process : a case study by Ashfaque Ahmed Chowdhury( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

The aim of the application of project based investigation in an undergraduate mechanical engineering course - fluid mechanics is to involve students with real life engineering problems and to enhance the students technical knowledge and problem solving skills. The classroom teachings, laboratory experiences and work on an engineering fluids project have been designed so that the students receive a broad range of introductory exposure to fluid mechanics with relevant applications of the theory. This paper highlights an overview of the course curriculum and assessment procedures for achieving excellence in teaching and research. It is anticipated that the students will be competent to make use of the advanced knowledge gained in this course in their professional career. At the conclusion it is believed that engaging project based study at the undergraduate engineering studies will enhance the progressive instructive trend in the learning process
Towards energy efficient building assets : review on sub-tropical climate by Ashfaque Ahmed Chowdhury( )

1 edition published in 2006 in Undetermined and held by 1 WorldCat member library worldwide

The energy efficient building asset is the key to the buildings sustainability. To approach the concept of energy efficient building assets in a sub-tropical climate, building assets must adopt a number of innovative strategies to take advantage of subtropical climate. A framework for understanding the climate comfort building relationship was proposed (Olgyay, 1953). This understanding was adapted to the psychrometric chart and was further developed to produce 'building bioclimatic chart' (Givoni, 1969). Milne (1979) elaborated these further and developed boundaries for outdoor conditions in terms of temperature and humidity which could be made comfortable by various energy conservation and management techniques. The importance of energy efficiency improvement in building asset is elaborated. Appropriate energy efficient technologies for building systems particularly Heating, Ventilation and Air Conditioning systems (HVAC) for subtropical/ warm humid climates is presented. The effectiveness of climate-responsive building design and space-conditioning strategies within the building assets in sub-tropical Queensland, Australia is reviewed and discussed
Performance analysis of a novel building material to achieve superior thermal comfort and energy efficiency in arid climate by Ashfaque Ahmed Chowdhury( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Analysis of Building thermal performance is necessary to predict comfort of the occupants in buildings and to identify the energy efficiency of the buildings. This study aims to study the impact of a new construction technology, incorporating the building envelop and internal walls, and examine the thermal performance of a residential building using smart construction materials in arid climate. The new envelop is technologically and environmentally sustainable and primary consists of, polystyrene, reinforced concrete, polystyrene and plaster board from inside and render from outside. The internal walls are made of compressed rice/wheat straws and are completely recyclable, biodegradable, and free from any chemical bonding elements, fire resistant and sound proof. An analysis and prediction of thermal comfort and energy consumption using DesignBuilder based on state of the art building simulation software EnergyPlus, is carried out in a residential building located in arid climate region of Australia. Simulated results show that this novel envelop reduces heat gains in buildings by 1.64 kW/m2/month, increases the thermal comfort of building occupants and reduces the energy required by 140 kWh/m2/year to cool buildings
Comparison of the performance and emissions of a petrol engine using a range of unleaded fuels by Simon A Breffit( )

1 edition published in 2008 in English and held by 1 WorldCat member library worldwide

The use of fossil fuels for transportation purposes has increased significantly over the last 60 years, and the environmental effects of the use of fossil fuels have become a matter of concern in recent years. This has lead to the development of a number of fuels which are intended to reduce the environmental impact of the ever-growing use of motor vehicles. There are a number of views on the advantages and disadvantages of these fuels, such as dispute as to the life-cycle emissions and the impact on performance. It is the aim of this paper to present independent findings into the performance and emissions pros and cons for some alternative fuels, Regular Unleaded (91octane), Premium Unleaded (95 octane) and Premium Unleaded, Ultimate (98 octane). In a full scale laboratory testing undertaken at Central Queensland University, it is found that Premium Unleaded and the Ultimate offer better power and torque efficiency with a grater [sic] percentage of specific fuel consumption compared to regular unleaded petrol. Moreover, the Ultimate appeared to have less exhaust emissions with lower concentration of all pollutants compared to regular unleaded petrol
Regional sustainabaility : local solutions to global issues : proceedings of Central Region Engineering Conference 2009, 14-15 August, 2009, Rockhampton, Queensland by Central Region Engineering Conference( )

1 edition published in 2009 in English and held by 1 WorldCat member library worldwide

"This conference is organised every three years in Rockhampton. The theme of this years conference is S2Regional Sustainability: Local Solutions to Global IssuesS3 is proposed to persuade the participants to discuss about the strength of local solution to address the global engineering problems. The conference programme incorporated 30 presentations including 4 keynote contributions from leading intellectual within the engineering community."--Page 7
Computer integrated manufacturing education to mechanical engineering students : teaching, research and practice by Ashfaque Ahmed Chowdhury( )

1 edition published in 2009 in Undetermined and held by 1 WorldCat member library worldwide

This paper details the research and development of Computer Integrated Design and Manufacturing at Islamic University of Technology (IUT), Bangladesh, a subsidiary organ of the Organization of the Islamic Conference (OIC). IUT is basically an educational and research institution offering undergraduate and postgraduate degrees in the field of Engineering and Technology. The objectives of Computer Integrated Manufacturing (CIM) education are to provide industry with a new generation of engineers having interdisciplinary skills necessary to deal with state of the art technology in designing, manufacturing, maintenance, selecting, and procuring manufacturing engineering systems. The research activities on CIM systems, the course coverage and laboratory facilities are discussed in the paper. The available programs are four-year Mechanical Engineering degree program specialising in production engineering, Masters Program, and PhD. There is a thirty-two-weeks research project at the undergraduate curricula of mechanical engineering. Areas of research topics include CAD (computer aided design), CAM (computer aided manufacturing), CAPP (computer aided process planning), CNC (computer numerical control) machine tools, DNC (direct numerical control machine tools), FMS (flexible manufacturing systems), ASRS (automated storage and retrieval systems), use of robotics and automated conveyance, computerized scheduling and production control, and a business system integrated by a common database in the Department of Mechanical and Chemical Engineering at IUT
Proceedings of the 20th annual conference for the Australasian Association for Engineering Education : engineering the curriculum : 6-9 December 2009, The University of Adelaide, Adelaide, Australia by Australasian Association for Engineering Education( Book )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Proceedings of the 20th annual conference for the Australasian Association for Engineering Education, held at the University of Adelaide in December 2009. Papers were presented by Australian and international delegates. The conference was focused on the engineering curriculum in higher education
An object oriented finite element formulation for construction simulation by Ashfaque Chowdhury( Book )

1 edition published in 1994 in English and held by 1 WorldCat member library worldwide

Energy performance, thermal comfort improvement and control strategies of building air-conditioning systems by Ashfaque Ahmed Chowdhury( )

1 edition published in 2007 in English and held by 1 WorldCat member library worldwide

"The main objective of this study is to analyse the energy performance and thermal comfort improvement of air-conditioning systems in buildings in a subtropical environment, and to evaluate low energy cooling strategies for energy conservation and retrofit of the existing facilities."--Abstract
Passive cooling control strategies for energy efficency in a subtropical climate air conditioned building by Ashfaque Ahmed Chowdhury( )

1 edition published in 2006 in English and held by 1 WorldCat member library worldwide

The effect of changing control strategies of mechanical ventilation and air conditioning (MVAC) systems is usually difficult to predict as MVAC processes are non-linear and characteristics of energy consumption change on a seasonal basis. This study investigates how energy consumption can be reduced by defining change in control strategies and tuning the control loops. DesignBuilder based on EnergyPlus, the newest energy simulation software, is used to evaluate the potential energy savings of different passive cooling control strategies. An energy performance baseline model is developed and the influences of demand shifting strategies are investigated progressively round the year. Pre-cooling and economiser control strategies are compared with the baseline energy model. The simulation results show that savings of up to 446MWh can be achieved by implementing pre-cooling control strategies and 123MWh by implementing economiser control strategies. Normalised performance indices are computed to reach a better understanding of each control strategy. The thermal comfort index shows that occupants comfort is not hampered, while the building is occupied, under all control strategies
Sustainable solution to the green waste management by thermo-chemical converison processes by Ashfaque Ahmed Chowdhury( )

1 edition published in 2009 in English and held by 1 WorldCat member library worldwide

The paper will provide a review of the energy efficient and environmentally more acceptable technology to convert various types of green wastes to Bio-oil and compare Australian and Indian scenario of the green waste management. Particular emphasis is given to the production of Bio-oil from green waste pyrolysis, the performance of Bio-oil production system through pyrolysis, the sustainability of a Bio-oil generation through pyrolysis, the sustainability indicators for effective process management
Simulation of building thermal performance in an institutional building in subtropical climate by Ashfaque Ahmed Chowdhury( )

1 edition published in 2007 in English and held by 1 WorldCat member library worldwide

Simulation of building thermal performance is important in predicting comfort of the occupants in buildings. An analysis and prediction of thermal comfort using Design Builder based on Energy Plus, state of the art building performance simulation software, is presented in this study for an air conditioned multistoried building in Rockhampton city of Central Queensland, Australia. Rockhampton is located in a hot humid region; therefore, indoor thermal comfort is strongly affected by the outdoor climate. The actual thermal condition of the Information Technology Division (ITD) Building at Central Queensland University during winter and summer seasons is evaluated and the possibilities of energy conservation without compromising thermal comfort of the occupants are explored. The Fanger comfort model, Pierce two-node model and KSU two-node model were used to predict thermal performance of the building. A sophisticated building analysis tool was integrated with thermal comfort models which allow for the determination of appropriate cooling technologies for the occupants to be thermally comfortable with sufficient energy savings. This study will also compare predicted mean vote (PMV) and thermal sensation vote (TSV) on a seven point thermal sensation scale calculated using the effective temperature, relative humidity, discomfort hours for alternative cooling and ventilation techniques
Analysis of Energy Performance of Institutional Buildings in Subtropical Climate( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

Abstract: Energy analysis and assessment are required to identify how much, where and how energy is used within a facility. The purpose is to analyse and assess the energy consumption pattern through the analysis of the historical energy consumption data by the buildings in an academic institution located in the subtropical region of Australia. This study reports some of the findings from the survey of the institutional buildings and the measurements of the energy consumption data related to the internal thermal load. The monthly monitored energy usages of the buildings are used to analyse the effects of climatic variation on energy utilization. The distinctiveness of this study is that the developed correlations between the energy utilization and weather pattern can be used to plan the sustainable operation of the institutional buildings in the subtropical region. Most importantly, the increased energy consumption pattern in the buildings will provide a good indication of the design feature and energy efficiency requirements in the building located in this climate
Reduction of carbon dioxide emissions by mineral carbonation by C. J Sturgeon( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

The study investigates the technologies that have the potential to provide feasible reduction of carbon dioxide (CO2) from a reference power plant. Particular focus has been given to mineral carbonation (at 1 bar) in which magnesium (Mg) and/or calcium (Ca) bearing materials fixate themselves to CO2 molecules to produce Mg and/or Ca carbonates in a solid stable form. The study also involved energy and mass balances of various mineral carbonation systems for simulation in Simulink. Furthermore, the various carbonation systems were incorporated into a model of a reference plants operating efficiency. This allowed for analysis of the impact that the carbonation systems would have on the existing plants performance
Analysis of building systems performance through integrated computation fluid dynamics technique by Ashfaque Ahmed Chowdhury( )

1 edition published in 2010 in English and held by 1 WorldCat member library worldwide

Computational fluid dynamics (CFD) has immenseeffect in building system performance. There have been fewstudies on the potential use of CFD in building concerning theevaluation of external and internal flow. In this study, CFDmodule of DesignBuilder (state of the building energy simulationsoftware) has been designed to predict airflow and temperaturedistribution in buildings. Conventional CFD packages (FLUENT, PHOENICS, CLIMA 3D etc.) for building airflow analysis istime consuming and intensive task to setting up the correctgeometry and boundary conditions. In this study, a simplifiedsimulation method has been followed by providing the geometryand boundary conditions in the CFD module of Design Builder. Calculated temperatures, heat flows and flow rates of air from thebuilding system have been provided boundary conditions simplyby specifying the time/date of the CFD analysis. The studyemploys SIMPLER algorithm, which belongs to one of the mostwidely used families of CFD solution methods. Turbulence ismodelled using standard k-e model. A wide range of boundaryconditions such as supply diffusers, extracts, temperature patches, etc. have been assigned to room surfaces. Component library hasbeen used to include building systems (radiators, fan-coil units)and occupants within the analysis. Using time dependent CFDsimulation, it is possible to control time dependent thermalcomfort by changing the boundary condition. In this study, CFDsimulation integrated with whole building energy model will beused to obtain more accurate prediction of the buildingperformance
Low energy cooling technologies for sub-tropical/warm humid climate building systems by Ashfaque Ahmed Chowdhury( )

1 edition published in 2006 in English and held by 1 WorldCat member library worldwide

The paper aims to investigate the technologies of low energy cooling that are compatible with existing buildings in order to reduce the energy consumption and peak demand associated with the cooling of institutional or commercial buildings in subtropical Queensland, Australia. The performance and effectiveness of a standard direct-expansion air-conditioning system are compared with those of a chilled ceiling radiant cooling system and a mixed-mode system that combines natural and mechanical ventilation within the building systems in a subtropical climate. The simulation results suggest that the chilled ceiling technique is preferable compared to the mixed- mode technique for efficient operation over the whole year and energy savings of 13-14% are achievable. An example of a building plan and materials is used to run the base case. DesignBuilder, an EnergyPlus based dynamic thermal simulation engine, is the simulation and visualization tool of the study
 
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English (26)