Australian Government Research Training Program Stipend (RTPS) Scholarship
Member of ASME American Society of Mechanical Engineers
Reviewer for Building and Environment Journal
Reviewer for ASME IMECE and FEDSM
Phase change material PCM
Fundamentals of Mechanical Engineering
Abdo, P, Huynh, BP, Irga, PJ & Torpy, FR 2019, 'Evaluation of air flow through an active green wall biofilter', Urban Forestry and Urban Greening, vol. 41, pp. 75-84.View/Download from: Publisher's site
© 2019 Elsevier GmbH Green walls show promise as active bio-filters to improve indoor air quality by removing both gaseous and particulate air pollutants. The current work represents a detailed assessment of airflow through an active green wall module. Airflow distribution through the module, the effect of wetting the substrate, and the effect of introducing a cover to the module's open top face were investigated, with the aim to improve the module's design and achieve more appropriate and effective airflow. Four cases of both planted and unplanted modules under both dry and wet conditions are considered. This work's primary observation is that more air will pass through a typical green wall substrate, and hence become cleansed, when the substrate is saturated wet more than when it is dry. The increase was substantial at approximately 50% more with 14.9 ± 0.2 L/s total air flow rate passing through the wet planted module versus 10 ± 0.2 L/s when dry. Reducing the 15.5 ± 0.75% of airflow passing through the module's open top face was found to be essential to maximize the bio-filtration capacity. Adding a top cover to the module having six 10 mm holes for irrigation decreased the airflow through the top by 6 ± 0.75%, and directed it through the filter increasing the percentage of air flow passing through the front openings from 79 ± 4% to 85 ± 4%.
Irga, PJ, Abdo, P, Zavattaro, M & Torpy, FR 2017, 'An assessment of the potential fungal bioaerosol production from an active living wall', BUILDING AND ENVIRONMENT, vol. 111, pp. 140-146.View/Download from: UTS OPUS or Publisher's site
Irga, PJ, Paull, NJ, Abdo, P & Torpy, FR 2017, 'An assessment of the atmospheric particle removal efficiency of an in room botanical biofilter system', BUILDING AND ENVIRONMENT, vol. 115, pp. 281-290.View/Download from: UTS OPUS or Publisher's site
Pettit, T, Irga, PJ, Abdo, P & Torpy, FR 2017, 'Do the plants in functional green walls contribute to their ability to filter particulate matter?', Building and Environment, vol. 125, pp. 299-307.View/Download from: UTS OPUS or Publisher's site
© 2017 Elsevier Ltd Indoor air quality has become a growing concern as people are spending more time indoors, combined with the construction of highly sealed buildings that promote thermal efficiency. Particulate matter (PM) is a common indoor air pollutant, with exposure to high concentrations associated with several detrimental health outcomes. Active botanical biofilters or functional green walls are becoming increasingly efficient and have the potential to mitigate high suspended PM concentrations. These systems, however, require further development before they become competitive with industry standard in-room air filters. Whilst the plant growth substrate in active biofilters can act as a filter medium, it was previously not known whether the plant component of these systems played a function in PM filtration. This study thus examines the influence of the botanical component on active green wall PM single pass removal efficiency (SPRE), with a focus on evaluating the air filtration features of different plant species in green wall modules. All tested botanical biofilters outperformed biofilters that consisted only of substrate. Green walls using different plant species had different single pass removal efficiencies, with fern species recording the highest removal efficiencies across all measured particle sizes (Nephrolepis exaltata bostoniensis SPRE for PM 0.3-0.5 and PM 5-10 = 45.78% and 92.46% respectively). Higher removal efficiencies were associated with increased pressure drop across the biofilter. An assessment of plant morphological data suggested that the root structure of the plants strongly influenced removal efficiency. These findings demonstrate the potential to enhance active botanical biofiltration technology with appropriate plant species selection.
Abdo, P, Huynh, BP & Avakian, V 2018, 'EFFECT OF GREEN WALL MODULES ON AIR TEMPERATURE AND HUMIDITY', Proceedings of the ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting (FEDSM2018), The ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting (FEDSM2018), The American Society of Mechanical Engineers (ASME), Montreal, Quebec, Canada.View/Download from: UTS OPUS
Abdo, P, Taghipour, R & Huynh, BP 2018, 'Effect of windcatcher's inlet shape on ventilation flow through a two dimensional room', American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM.View/Download from: UTS OPUS or Publisher's site
Copyright © 2018 ASME Natural ventilation is the process of supplying and removing air through an indoor space by natural means. Windcatcher has been used over centuries for providing natural ventilation using wind power, it is an effective passive method to provide healthy and comfortable indoor environment by decreasing moisture content in the air and reducing pollutants concentration. The windcatcher's function is based on the wind and on the stack effect resulting from temperature differences. Generally, it is difficult for wind to change its direction, and enter a room through usual openings, the windcatcher is designed to overcome such problems since they have vertical columns aimed at helping wind to channel down to the inside of a building. The efficiency of a windcatcher is maximized by applying special forms of opening and exit. The openings depend on the windcatcher's location and on its cross sectional area and shape such as square, rectangular, hexagonal or circular. In this study the effect of the inlet design is investigated to achieve better air flow and increase the efficiency of windcatchers. To achieve this, CFD (computational fluid dynamics) tool is used to simulate the air flow in a two dimensional room fitted with a windcatcher based on different inlet designs such as a uniform inlet, a divergent inlet and a bulging-convergent inlet.
Taghipour, R, Abdo, P & Huynh, BP 2018, 'Effect of Wind Speed on Ventilation Flow Through a Two Dimensional Room Fitted With a Windcatcher', Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition (IMECE2018), The ASME 2018 International Mechanical Engineering Congress and Exposition (IMECE2018), The American Society of Mechanical Engineers (ASME), Pittsburgh, PA, USA.View/Download from: UTS OPUS or Publisher's site
Abdo, P & Huynh, BP 2018, 'Effect of passive green wall modules on air temperature and humidity', ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), Pittsburgh, Pennsylvania.View/Download from: UTS OPUS or Publisher's site
Copyright © 2018 ASME. Green walls are bio-filters developed to enhance air quality. Often, these walls form the base from which plants are grown; and the plant-wall system helps to remove both gaseous and particulate air pollutants. Green walls can be found indoors or outdoors and they are classified as passive or active systems. Their benefits include temperature reduction, improvement of air quality and reduction of air pollution, oxygen production as well as the social and psychological wellbeing. They can produce changes in the ambient conditions (temperature and humidity) of the air layers around them which create an interesting insulation effect. The effect of passive green wall modules on the air temperature and on humidity is investigated in this work. A closed chamber made of acrylic sheets is used to monitor the temperature and humidity variation caused by a green wall module placed at its center. Temperature and humidity are measured at different locations inside the chamber during operation for different modules with different plant species.
Abdo, P, Taghipour, R & Huynh, BP 2018, 'Simulation of Buoyancy Driven and Winddriven Ventilation Flow in a Three Dimensional Room Fitted with a Windcatcher', Proceedings of the 21st Australasian Fluid Mechanics Conference, Australasian Fluid Mechanics Conference, The Australasian Fluid Mechanics Society, Adelaide, Australia.View/Download from: UTS OPUS
Abdo, P, Huynh, BP & Avakian, V 2018, 'Effect of Fan Speed on Air Flow Through a Green Wall Module', Proceedings of the ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting (FEDSM2018), The ASME 2018 5th Joint US-European Fluids Engineering Division Summer Meeting (FEDSM2018), The American Society of Mechanical Engineers (ASME), Montreal, Quebec, Canad.View/Download from: UTS OPUS or Publisher's site
Abdo, P, Huynh, BP & Avakian, V 2017, 'Distribution of Air Flow Through a Green Wall Module', ASME 2017 Fluids Engineering Division Summer Meeting, ASME 2017 Fluids Engineering Division Summer Meeting, Waikoloa, Hawaii, USA.View/Download from: UTS OPUS or Publisher's site
Abdo, P & Huynh, BP 2017, 'Effect of combining buoyancy driven and winddriven ventilation in a two dimensional room fitted with a windcatcher', ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE), ASME 2017 International Mechanical Engineering Congress and Exposition, AMSE, Tampa, Florida, pp. 1-7.View/Download from: UTS OPUS or Publisher's site
Copyright © 2017 ASME. Natural ventilation is the process of supplying and removing air through an indoor space by natural means. There are two types of natural ventilation occurring in buildings: winddriven ventilation and buoyancy driven ventilation, or stack ventilation. The most efficient design for natural ventilation in buildings should implement both types of natural ventilation. Stack ventilation which is temperature induced is driven by buoyancy making it less dependent on wind and its direction. Heat emitted causes a temperature difference between two adjoining volumes of air, the warmer air will have lower density and be more buoyant thus will rise above the cold air creating an upward air stream. Combining the winddriven and the buoyancy driven ventilation will be investigated in this study through the use of a windcatcher natural ventilation system. Stack driven air rises as it leaves the windcatcher and it is replaced with fresh air from outside as it enters through the positively pressured windward side. To achieve this, CFD (computational fluid dynamics) tool is used to simulate the air flow in a two dimensional room fitted with a windcatcher based on the winddriven ventilation alone and on the combined buoyancy and winddriven ventilation.
Abdo, P, Fardoun, F & Huynh, BP 2016, 'Estimation of the Total Fatigue Life of Metallic Structures', Proceedings of the ASME 2016 International Design Engineering Technical Conferences & Computers and Information in Engineering Conference IDETC/CIE 2016, ASME International Design Engineering Technical Conferences & Computers and Information in Engineering Conference (IDETC/CIE), ASME, Charlotte, NC, USA.View/Download from: UTS OPUS or Publisher's site
The fatigue life of a component is defined as the total number of cycles or time to induce fatigue damage and to initiate a dominant fatigue flaw which is propagated to final failure.(Shigley & Mischke 2002). The aim of this project is to calculate the total fatigue life of metallic structures under cyclic loading by applying equations found by Basquin and Manson-Coffin. The local stresses and strains necessary for the calculation are determined by the finite element method. Former studies concerning this subject have used analytical methods to find the local conditions at the
critical section. The analytical methods, based on Neuber and Molski-Glinka's approaches, permit the calculation of the local stresses and strains at the critical section of the structure's geometry as a function of the nominal stress (forces) applied. For the finite elements method, ABAQUS is used to determine the local conditions at the critical section of a T-shaped model.
Abdo, P, Huynh, BP, Avakian, V, Nguyen, TT, Gammon, J, Torpy, FR & Irga, PJ 2016, 'Measurement of air flow through a green-wall module', Proceedings of the 20th Australasian Fluid Mechanics Conference, Australasian Fluid Mechanics Conference, Australasian Fluid Mechanics Society, Perth.View/Download from: UTS OPUS
KEY RESEARCH HIGHLIGHTS
Operational parameters of the Junglefy Breathing Wall system were determined and characterised. Data collected included system water loss, pressure drop, air distribution and the system's effect on ambient temperature and relative humidity.
Clean air delivery rates were calculated utilising the removal efficiencies. The system produced 25.86¬–28.70 m3/h per module, depending on particle size and airflow rate. A typical Breathing Wall of 10 m2, utilising 40 modules would thus produce up to 12,700 m3/h of particle-free air.
Tests were conducted to identify the most appropriate plant species for survival in high pollution environments. All of the plant species tested, which are currently used in commercial applications of the Breathing Wall, recorded moderate air pollutant tolerance, and thus the system using the current plant species could possibly be used in industrial applications. Pollutant effect on air filled porosity of the substrate was negligible, even under extremely high pollutant loads.
Air quality tests were conducted at the Lend Lease Head Office, and the efficiency of the first Breathing Wall installation was monitored. The Breathing Wall is successfully reducing ambient particulate matter and carbon dioxide relative to outdoors and other areas throughout the building. Additionally, air pollutants including carbon monoxide, volatile organic compounds and sulphur dioxide were below the detection limit of the equipment being used, indicating excellent indoor environmental quality. The results indicate that the Breathing Wall is working as intended.