QUESTION 1
A steel square tray (1.25 m x 1.25 m x 0.1 m) is filled with kerosene and ignited. Compute the following:
1. 1(a) The heat release rate.
2. 1(b) The flame height.
3. 1(c) The duration of burning.
A compartment is introduced as shown in Figure: Question 1 below.
4. 1(d) What is the theoretical maximum het release rate that can be attained within the compartment? (Hint: in a fire, for each kg of oxygen consumed, 13,100 kJ of energy is released).
5. 1(e) Using the Babruaskas method, what is the minimum heat release for a fire to cause flashover in the compartment?
6. 1(f) Using the Thomas method, what is the minimum heat release for a fire to cause flashover in the compartment? (Assume door fully open and window fully broken).
The kerosene fire is placed in the centre of the compartment shown in Figure: Question 1.
7. 1(g) Assuming the compartment is comprised of 150 mm thick concrete, calculate the time temperature history for the kerosene fire in the compartment (see slide 136 for thermal properties).
8. 1(h) Assuming the compartment is comprised of 150 mm thick gypsum board, calculate the time temperature history for the kerosene fire in the compartment.
9. 1(i) Present results attained in Parts 1(g) and 1(h) of this question in graphical format and provide commentary.
Figure: Question 1