Posted: April 12th, 2022

“Engineering models for enclosure fires

Task -1 25 Task – 2 35 Task – 3 10 Task – 4 20 Overall presentation and structure 10 Total 100
Pt Marker 2″ Marker* UCLan Verification External Examiner Initials Name: Name: Name: Name: Date: Date: Date: Date:
* 2. Marking on sample basis. Please note that all marks are provisional subject to confirmation by the Module Assessment Board of the University of Central Lancashire, UK.
Assignment Details
TASK 1
“Engineering models for enclosure fires can be classified as either probabilistic or deterministic. The deterministic models can roughly be divided into three categories: computational fluid dynamics (CFD) models, zone models, and hand-calculation models”.
You are asked to write about the use of these deterministic models in fire engineering applications.
The following points can be included in your report.
• An introduction to various models • advantages and limitations of each model. • The main process involved in these models. • application of these models in fire engineering disciplines.
(Approx. word count — 800 words)
[25 marks]
TASK 2
Assume X litres of liquid fuel leak into a circular, X m2 area and ignites and as you aware “the hot gases rise, cold air will be entrained into the plume, causing a layer of hot gases to be formed under a ceiling”.
In order to make the assignment individual for each student, refer to table 3.3 of the Enclosure Fire Dynamics text book and choose one of the fuels listed. Students can also assume the amount in litres of fuel and the dimension of the circular area after confirming with the Module tutor.
Read Chapters on Energy Release Rate and Fire Plumes and Flame Heights from the textbook by Karlsson, B., and Quintiere, J. G. (2000). Enclosure fire dynamics. CRC Press, Boca Ranton and answer the following questions.
• Using equations 3.5 and 3.6, calculate the energy release rate. • What would be the duration of fire? • Calculate plume mass flow and centre line temperature at a height of 5m using all the different plume equations which you have studied in the course FV 3001 (Module lectures were prepared based on the above book). Students are expected to comment on the differences in values. • And finally, you need to write about why understanding fire plumes, flame heights, and ceiling jets is significant for a fire safety engineer. You need to include relevant examples in your report. (The approximate word count for this particular subtask is 300 words.)
Note: Providing only the calculation without commentary or analysis of various fire plume values in the report is not acceptable.
[35 marks]

Note: Providing only the calculation without commentary or analysis of various fire plume values in the report is not acceptable.
[35 marks]
Task 3
“Understanding the generation of combustion products involves a detailed knowledge of their chemistry. But this is very complex, and the fire protection engineer must rely on measurements, not fundamental theory, to make predictions”.
Write a short report on the methods of fire toxicity assessments for combustion products.
(Approx. word count — 300 words)
[10 marks]
Task 4
“When a building fire is fully developed, flames may spill out of external openings. It is well established that Externally Venting Flame may significantly increase the risk of fire spreading to higher floors or adjacent buildings”.
• Select any high-rise building facade fire incident that happened in the time period 2000-2022 and write about the cause of fire origin, reason for fire spreading to the higher floors, consequences, etc. • Also, write a commentary on why it is important to understand the thermal and geometrical characteristics of externally venting flames.
(Approx. word count — 600 words)
[20 marks]
Marks Deterministic Model 25 2) Proper presentation Calculation, result and commentary 35 3) Fire Toxicity assessment 10 4) Facade fire incident and explanation 20 Overall presentation structure, clarity with proper steps, word format, citation and referencing etc. 10 Total 100
Remember:
• Make sure that final document proof reading is done for technical aspects such as

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