Mohd Zahirasri Mohd Tohir

Mohd Zahirasri Mohd Tohir
Universiti Putra Malaysia | UPM · Department of Chemical and Environmental Engineering

PhD Fire Engineering

About

37
Publications
14,939
Reads
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117
Citations
Introduction
Mohd Zahirasri Mohd Tohir currently works at the Department of Chemical and Environmental Engineering, Universiti Putra Malaysia. Mohd Zahirasri does research in Forest Fire, Fire Risk Analysis, Probabilistic Analysis, Fire Safety Engineering and Safety Engineering.
Additional affiliations
May 2015 - present
Universiti Putra Malaysia
Position
  • Lecturer
Education
May 2011 - May 2015
University of Canterbury
Field of study
  • Fire Engineering
September 2005 - June 2009
The University of Manchester
Field of study
  • Chemical Engineering

Publications

Publications (37)
Article
When considering fire safety design scenarios for car parking buildings it is possible that there will be spread of fire between multiple vehicles. Such scenarios need to account for the likely rate of heat release curve from already burning vehicles as this will impact on the likelihood that other vehicles will ignite and so increase the severity...
Article
Full-text available
The high capacity and voltage properties demonstrated by lithium-ion batteries render them as the preferred energy carrier in portable electronic devices. The application of the lithium-ion batteries which previously circulating and contained around small-scale electronics is now expanding into large scale emerging markets such as electromobility a...
Article
This paper describes the application of the flux-time product ignition criterion and the point source flame radiation model to predict the time to ignition in multiple vehicle spread scenarios. Ten experiments from the literature have been selected due to sufficiency of information required to apply the methods. The outcome of this work is to be ap...
Article
Full-text available
This paper describes a relatively simple probability quantitative risk analysis model to determine appropriate fire scenarios for car parking buildings. The approach introduces a dimensionless measurement defined as fire risk level by multiplying probability by consequence. For the development of fire scenarios for car parking buildings, the key va...
Article
Full-text available
The time-equivalence method is one way to determine the appropriate fire severity in buildings. One of the input parameters required is the fire load energy density (FLED) and in a deterministic design this is taken to be a fixed value. This paper illustrates the use of a simple Monte Carlo tool that accounts for statistical variations in car energ...
Article
In this work, a rig was constructed to conduct destructive impact tests on cylindrical lithium-ion battery (LIB). The rig was intended to simulate the loss of mechanical integrity of the battery structure that might arise from heavy load and high impact. Thermal runaway behaviour of LIB from the tests was recorded by visual camera, thermal imaging...
Article
The simulation configuration and process analysis of the Subcritical Organic Rankine Cycle (SORC) system are carried out for the potential comparison between pure, binary, and ternary zeotropic mixtures of R1234ze(E), R1234yf, and R134a as refrigerant working fluids based on applying the flue gas as a heat source with medium temperature. The compre...
Article
Fatal falls from heights accidents represent a threat to any industry’s development and progress. It is crucial to understand how these accidents evolve from a simple ‘near miss‘ into a ‘fatal accident‘. In recent years, Malaysia’s construction industry suffered an increasingly alarming number of fatal falls from heights accidents. Fatal accident n...
Article
In recent years, it is evident that there is a surge in photovoltaic (PV) systems installations on buildings. It is concerning that PV system related fire incidents have been reported throughout the years. Like any other electrical power system, PV systems pose fire and electrical hazards when at fault. As a consequence, PV fires compromised the sa...
Article
The new Fourth Industrial Revolution (IR 4.0) trend is driven by the concept of automation and artificial intelligence (AI). However, Malaysia is slightly behind Singapore in terms of adopting AI innovation among ASEAN countries. This paper aims to conduct a literature review of machine learning to overcome subjectivity and bias in risk ranking dec...
Article
With the rapid growth of the worldwide photovoltaic (PV) installation, the number of fire incidents involving PV systems also shows an increasing trend. Several studies revealed that installing PV systems on the rooftop has introduced an additional fire risk to the building. Therefore, risk assessment is required to identify the possible cause of f...
Article
Numerous photovoltaic (PV) fire incidents are caused by overheating of PV system components, direct current (DC) arc-fault or hot spot phenomenon. These causes happen mainly due to poor installation practices by the installers. Many PV system installation guides do not emphasise much on the fire hazard during installation. As the PV system is becom...
Article
A fault tree analysis of fires related to photovoltaic (PV) systems was made with a focus of understanding the failure rate of the electric components. The failure rate of different components of these systems was calculated from data obtained from reports, research studies, and fire incident statistics of four countries. The results explain the si...
Article
Purpose In recent years, the number of high-rise buildings in Malaysia has been increasing. Therefore, it is essential to take evacuation into consideration especially for emergency conditions such as fire, explosion and natural disasters. This research aims to evaluate the effectiveness of the escape time in typical Malaysian high-rise residential...
Article
Full-text available
In this work, thermal runaway of lithium-ion battery was characterised under adiabatic and non-adiabatic conditions using Accelerating Rate Calorimeter (ARC) and oven respectively. Battery with higher electrical capacity demonstrated a higher tendency to experience thermal runaway with shorter induction time and resulted with a more energetic respo...
Article
Full-text available
Fire-induced domino accidents are less probable but highly consequent. Although past studies conducted risk assessment of such events, classical models were used for impact estimation. Moreover the influence of varying weather on evolution of fire domino effect was not investigated, where past research necessitates the use of computational fluid dy...
Article
Advanced porous materials with uniform molecular scale apertures are highly desirable for energy related separations. Among them, zeolitic imidazolate frameworks (ZIFs) have received significant interest as separation membranes owing to their narrow apertures that can target small gases. ZIFs exhibit excellent gas transport properties, such as unpr...
Article
The mass loss against temperature and time through thermogravimetry analysis (TGA) was measured upon six wood species: Shorea laevis (Balau), Vatica rassak (Resak), Koompassia malaccensis (Kempas), Heritiera albiflora (Mengkulang), Shorea parvifolia (Meranti sarang punai), and Cratoxylum arborescens (Geronggang) at the heating rates of 5, 10, and 2...
Article
Full-text available
Landfill fires are a growing problem for the environment and safety at the global level. In recent years, certain incidents of landfill fire have occurred in Malaysia, describing the need to assess the risk of fire ignition and its consequences in Malaysian landfills. The objectives of this study are to analyze the source of ignition for landfill f...
Article
Full-text available
Working at heights has always been a concern for the process industry and construction industry. According to recent statistics, falls from heights are the leading cause for at least a third of all construction accidents, based on the accident reports from Malaysia, United States of America (USA) and Great Britain. Therefore, the aim of this resear...
Article
Full-text available
The information on the combustion properties of local timber is crucial in Malaysia as the archival material related to this subject matter is found to be very limited in scope and incomplete. The heat release rate (HRR) is the most precious variable of combustion properties as it provides the key to understand and quantify the hazard in fires. Thu...
Article
Incorporation of phase change materials (PCM) in construction materials increases thermal mass of the buildings and reduces diurnal daily fluctuations of indoor air temperature. Direct impregnation is a cheap and easy method to embed PCM into the wood. The main shortcoming of this way is that the amount PCM is depleting over time that leads to degr...
Article
Full-text available
The mass loss of three wood species in Malaysia, Shorea laevis, Koompassia malaccensis, and Shorea parvifolia were measured against time and temperature at three different heating rates (5, 10 and 20 °C/min) in nitrogen environment, through thermogravimetry analysis (TGA) technique. This measurement revealed that the decomposition of these wood gen...
Article
Full-text available
A model of Subcritical Organic Rankine Cycle (SORC) driven by trans-1, 3, 3, 3-tetrafluoroprop-1-ene, R1234ze(E) as a new-typed environmental friendly refrigerant working fluid, was developed and analyzed in the view of the 180-220°C wet fluegas combustion and burning from natural gas, as a low to medium temperature heat source without the outlet t...
Conference Paper
Full-text available
The activation time of a sprinkler has a great impact on the fire growth inside a compartment. The longer time it takes for a sprinkler to activate, the higher the risk of fire to start to spread inside the compartment. In this study, the activation times of off-the-shelf half inch 68°C fire rated pendant sprinklers were assessed through experiment...
Conference Paper
Full-text available
A model of Subcritical Organic Rankine Cycle (SORC) driven by trans-1,3,3,3-tetrafluoroprop-1-ene, R1234ze(E) as a new-typed environmental friendly refrigerant working fluid, was developed and analyzed in the view of the 180-220 C wet fluegas combustion and burning from natural gas, as a low to medium temperature heat source without the outlet temp...
Article
Full-text available
Timber is one of the most sustainable and renewable raw materials available. Globally, it has been increasingly used for the manufacture of home and workplace furniture. Timber products are known to have ignition resistance and a low heat release rate. These characteristics delay burning and maintain the structural durability of a product, protecti...
Article
Full-text available
One of the mos t important component in performance-based design i s tenability analysis study in a compartment. What it means by tenability analysis in this study is by getting the Available Safe Egress Time (ASET) based on several tenability criteria parameters namely Fractional Effective Dose (FED) for gases and thermal, smoke layer and vi sibil...
Chapter
Full-text available
Over recent years, performance-based design approach has gained acceptance in the engineering community around the world. This has prompted an expanded demand in engineering approaches to the assessment of fire safety in structures. Two arising questions in designing car parking buildings are (1) if there had been another vehicle parked next to or...
Article
Full-text available
There are several non-renewable sources for the generation of electricity and one of them is by the gas-fired power plant. Gas-fired power plant is utilizing natural gas which is mainly composed of methane in its process for the production of electricity. The usage of natural gas poses safety concerns should unwanted events occurred. Therefore, the...
Article
Full-text available
An evacuation situation in any building involves many risks. The geometry of building and high potential of occupant load may affect the efficiency of evacuation process. Although fire safety rules and regulations exist, they remain insufficient to guarantee the safety of all building occupants and do not prevent the dramatic events to be repeated....
Article
Full-text available
Fires associated with vehicles have the potential to impact on life safety and property protection. The fire severity characteristics of single passenger vehicle fires are presented in this paper by the total energy released, peak rate of heat release and the time to peak rate of heat release using experimental data collated from the literature. Ri...

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Projects (2)
Archived project
Fire in car park buildings