Method for Steam pressurization accident calculation
Method for Steam pressurization accident calculation
(OP)
I would like some advice on methods to use to calculate steam pressurization accident scenario. The end result is to size a pressure relief device for safety. I am pressure casting metal using water cooled induction coils
System:
Vacuum Chamber - 8.3ft^3
Heat Source - Crucible at 1000 C, diam=4inches
Induction Heating Coils ~ 0.75 inch away from crucible, water cooled at 2-5 gpm, 0.5in diameter copper tubing
I believe that the likely accident scenario is a pinhole in the copper line spraying on the hot crucible.
I have done some research and have found information on Liedenfrost Temperature methods may be applicable.
System:
Vacuum Chamber - 8.3ft^3
Heat Source - Crucible at 1000 C, diam=4inches
Induction Heating Coils ~ 0.75 inch away from crucible, water cooled at 2-5 gpm, 0.5in diameter copper tubing
I believe that the likely accident scenario is a pinhole in the copper line spraying on the hot crucible.
I have done some research and have found information on Liedenfrost Temperature methods may be applicable.





RE: Method for Steam pressurization accident calculation
Larry
RE: Method for Steam pressurization accident calculation
Your pressure relief valve ( for hot water) should be sized for releiving capacity normally expressed in btu/hr and set pressure expressed in psig. No temperature setting is required since your are not protecting a hot water storage tank? So heat input to the cooling coil and a safe design pressure of the tubing have to be determined. You may also need a flow switch in the cooling coil to shut down the heat source in the event the coolant flow is interrupted.
RE: Method for Steam pressurization accident calculation
The chamber itself is designed to a MAWP based on the process of pressure casting with the appropiate safety factors. The copper cooling line is also designed based on the internal line pressure and flow, and there are interlocks in place to stop power if there is no water flow.
We are still in the design phase, so none of this is built yet, but I am analyzing accidents so that the system is bounded and safe.
RE: Method for Steam pressurization accident calculation
http://apistandardsonline.api.org
Larry
RE: Method for Steam pressurization accident calculation
I will look those standards up.