PE Problem #43

8/5/2019

A liquid storage tank rupture results in a fire containing an open 45 gallon (130 kg) tank containing animal fat. Using gross heat of combustion, estimate the time it would take to burn the remaining fuel without interruption if the tank is half filled and the fire is approximately 2.45 MW.
a. 1.2 seconds
b. 11 minutes
c. 18 minutes
d. 17.6 hours

Solution | Posted 08/06/19

3 Comments

Jack

8/5/2019 08:53:27 am

Table A.32 of SFPE HB:
Gross hc of animal fat = 39.8 MJ/kg

Fire size = 2,450 kW = 2.45 MW

2.45 (MJ/s) / 39.8 MJ/kg = 0.061 kg/sec --> 3.69 kg/min

The tank is half full, so its contents is 0.5(130) = 65 kg.

65 kg / 3.69 kg/min = 17.6 min --> 18 min

C

Amr

8/5/2019 11:05:22 am

C. 18 minutes

MeyerFire eq. 2.16
FPH P 6-280

9/16/2019 12:28:08 pm

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