Reference no: EM132704775

FV 3001 Enclosure Fire Dynamics - International College of Engineering and Management

TASK 1

"The recent emergence of performance-based regulations for the fire safety and the increased complexity of building design have led to a dramatic increase in the use of computer modelling of smoke and heat movement in buildings".

Critically review zone and field models used for compartment modelling. Your report should cover main assumptions, differences between the two models, limitations and prose and cones of both models.

TASK 2

X is the amount of litres of oil which leaks from the pump in the following assignment. In order to make the assignment individual for each student, the following values will be used:

• Student 1 uses 5 liters
• Student 2 uses 10 liters
• Student 3 uses 15 liters
• Student 4 uses 20 liters
• Student 5 uses 20 liters
• Student 6 uses 25 liters
• Student 7 uses 30 liters and as follows.

A pump in a large industrial hall breaks down and X litres of transformer oil leak into a circular, 2m2 sump, surrounding the pump. A heat detector is situated 6 m above the fire.

a) Calculate the maximum heat release rate.
b) How long does it take for the oil to burn out?
c) Calculate the plume mass flow rate 6 m above the fire
d) Calculate the centreline plume temperature 6 m above the fire.

You must do this calculation of plume mass flow and centre line temperature with all different plume equation that we have studied in the course FV 3001 and must provide a commentary on differences in the values.

Task 3

The stoichiometric combustion of a fuel in air produces many flue gases that depend on the fuel chemical composition. In normal situations, they are CO₂, H₂O, SO₂ and N₂. A general chemical equation can be expressed as follows.
C_αH_βS_γO_δN_ε +v₀ (O₂ + 3.76 N₂ ) → v₁CO₂ +v₂H₂O +v₃SO₂ +v₄N₂

• You can choose any fuel of your choice which release/produce minimum 4 types of flue gases during combustion.
• Calculate the following:
o The relative molecular mass of all species
o Fuel-air mass ratio at stoichiometric condition.
o Yield of all flue gases.
o Enthalpy of formation.
o CO2 under stoichiometric condition.
o Oxygen depletion.

Task 4
Write a critical literature review on toxicity assessment of combustion gases.

Task 5
Fireball 50 m diameter is formed by accidental propane release ignited in the atmosphere. Average estimated temperature is 1700 K, mole fraction of carbon dioxide is 0.13, mole fraction of water vapour is 0.12, soot volume fraction is 1.2 ppm.

Calculate the minimum distance lmin from the centre of the fireball, at which the radiant heat flux from the fireball falls below the safe threshold qmax = 2.5 kW/m².

Attachment:- Enclosure Fire Dynamics.rar