Page 1 of 5 FV2204 Computational Engineering Assignment 1 Brief The work should be word-processed and submitted online to Canvas unless specified below. The deadline for submission is 9:00 pm on 8 March 2021 (Monday). Aims of Assessment • To encourage you to précis information from books and lectures. • To assess your knowledge and understanding of quantitative hazard analysis of fires with modelling • To assess your knowledge and understanding of using CFD for analysis of fire risks • To assess your ability to integration of CAE methods for fire safety design Learning Outcomes This piece of assessment will test your ability to meet learning outcomes 4~6 as described in your module booklet: - • Demonstrate the use of problem solution tools and evaluative skills in the selection of appropriate methods of analysis • Formulate problems of fire risk analysis and solve common types of these problems on computers • Gain experience of using specialist software for computational engineering Assignment Details • This is an individual assignment. All plagiarism will result in a mark of ZERO for the assignment. • This assignment requires the students to complete ALL questions as attached; • This assignment requires maximum words of 2500; • All the assumptions and steps in your answers should be clearly stated due to be awarded; and • This assignment will carry 50% weighting of the total mark for this module. • Submission of all input files (as reference) is required. Submission Details This assignment should be submitted to TURNITIN of the Canvas System preferably at least ONE day before the deadline set out at the top of the page to avoid delay of the report due to heavy loading of the system by the deadline. Five days rule will be applied for any late submission, i.e. 40% mark is capped. Page 2 of 5 Assignment Details – Answer ALL Questions In the revitalization of a heritage building, the purpose of the building is usually changed. Therefore, the fire safety provisions of the building should be upgraded to meet the current statutory requirement. However, the existing design of the heritage building usually restricts the compliance to the current statutory requirements. Performance-based fire safety engineering approach is adopted for the design of the building. A heritage private study hall with 100 years is proposed to be converted to an exhibition center. It is a two-storey building with an internal staircase. The layouts of the heritage building are shown in the attached figures (Figure 1 to Figure 3). The ground floor of the building will be an Exhibition Hall (see Figure 1). The first floor will be changed to Office usage (see Figure 2). You, as a fire safety engineer, are required to apply the performance-based fire safety engineering approach to change the heritage building from private study hall to exhibition center. Figure 1 Floor Plan of G/F x y A B (Proposed Occupant at G/F =50) (View of Figure 3) Not to scale Page 3 of 5 Figure 2 Floor Plan of 1/F Figure 3 Elevation of the Heritage Building Not to scale x y Not to scale B A (Proposed Occupant at 1/F =12) (View of Figure 3) Page 4 of 5 The fire breaks out at 2 locations (e.g. 2 scenarios) as described below and indicated in Figure 1 and Figure 2. Fire Scenario Location Proposed Heat Release Rate Agreed Travel Time 1 Near the exit door of the Exhibition Hall at G/F 1.0 MW 25 s 2 At the centre of the Office at 1/F 1.5 MW 55 s Each student needs to complete the following tasks: 1. CFAST is a zone model that divide the compartment into two control volumes, a relatively hot upper layer and a relatively cool lower layer, please derive the upper layer volume differential equation. Each student shall use CFAST to simulate the impact of fires and smoke in the building environment for 10 minutes duration. The smoke layer height, smoke temperature and gases concentration of the fire compartments shall also be reported. (30 Marks) 2. Each student shall also use the Fire Dynamics Simulator (FDS) to predict the following for 10 minutes duration: (40 Marks) • Temperature distribution; • CO concentration; • Soot visibility distribution; • Radiation heat flux along the egress route. 3. Based on the FDS result, please comment whether the proposed building design retains its fire safety level equivalent to prescriptive requirements. You are also requested to advise the solution to enhance the fire safety level of this building. (30 Marks) Page 5 of 5 Remarks Each student shall: • state the assumptions, • state boundary conditions, • state approaches; • reporting the simulation results and related screenshots captured in Smokeview for each fire scenario; Marking Criteria for Assignment The submitted assignment will be marked according to the following criteria: Questions Marking Allocation Marking Criteria Q1 30 Demonstrate both understanding and application of CFAST and evaluative skills on the fire and smoke development for the designed fire scenario. Q2 40 Demonstrate the use of FDS with fire engineering knowledge and relevant material. Assumption shall be made with appropriate supporting materials like guidebook, journal paper and etc. Q3 30 Application of fire safety measures like the smoke extraction system for fire safety level enhancement with FDS results. Total 100
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