Considering the filter would be full of liquid in beginning of the fire, it doesn't collapse before PSV opening.
My understanding from all of discussion is at below:
1- Filter inlet/outlet isloation valves are closed
2- Filter is full of water
3- Initial water temp. is 25 °C
4- PSV set preesure is 148.3 barg
4- Pool fire is happend adjacent of filter
1- Water temperature start to rising and also expanding because of external
2- At temperature around 48 °C, PSV start to opening due to Thermal
expansion(25% overpressre on PSV set pressure has been considered)
3- After PSV opening pressure will be decrease and water temperatre still
continue to rising
4- When the water reach to it's boiling point in PSV set pressure + 21%
overpressue (357°C), PSV open again and release steam, this will be
continue till all of filter water content discharged to atmosphere through PSV
in steam format.
5- When all of water in filter is finished then filter start to collapse due to fire
Could you please confirm if my above understanding is true.
Edited by Afshin, 09 January 2012 - 05:54 AM.