Thanks Toymaker, I am glad you have considered these factors.
I was exploring ideas, not trying to stop your project. Simply Freon gas is beyond my experience. The only thing approaching that was a factory where I designed equipment that held a huge volume of SF6 gas, which is highly corrosive with moisture, as in the air passages and lungs. It's as bad as Phosgene used to kill people in the First World War.... So I was taught to err on the side of caution and safety...
So you have 4.14litres of Freon (liquid, as it is under pressure?) in a container (the boiler and pipework to the turbine, condenser etc.). and the pressure is 500psi.
So I would simply rate this as a 141bar-litre "boiler".
So how much space would this gas fill if allowed to fill a closed space at atmospheric pressure? Say at 35C = not hotter than I have just experienced in Greece. (I don't know how hot you get where you are?). I am considering a "Gaseous state" as if the leak was inside the boiler chamber, where there is adequate heat from the burner and hot metal to vapourise the Freon.
I am not trying to persuade you to use water, but that is my only liquid-vapour boiler experience... that I am using just for comparison. When it comes to boilers, a boiler of 5L at 6 bar between your thighs (on a railway locomotive) is a common sight on the rail-track at my local club, so these things can be managed safely, even so close to the "family jewels".
Enjoy your project, even if I am asking stupid questions. I am only trying to learn from you.
Incidentally, I found an interesting hot oil burner...
And in the UK, the Propane tanks are steel, with an Hydraulic test pressure of 400psi.
Stay happy, and safe,
K2
Your closed space volume question is purely academic. As you have pointed out, my project compared to model boilers is on the large side,...in fact, it's a car sized boiler and will never, ever be in a totally enclosed area. Thailand has car ports, not garages, so my project will always be operated outdoors. Still, I will try to answer your question of volume expansion from a liquid to vapor.
In the event of a boiler tube rupture resulting in the loss of all 4 liters within the monotube, the hot R123 gases would immediately expand dropping R123's temperature to room temp. So we're really looking at the volume difference between 4 L of liquid R123 vs 4 L of vapor R123 at room temp. (Actually, the density of R123 at 183 C and 500 psi is less than it's density at 34 C and near 1 bar pressure, resulting in less volume per kg, but I will use room temp volume/kg as a worst case condition)
One liter of R123 liquid weighs 1.44 kg at 34 C, so 4 L weighs 5.76 kg. (
R123 Calculator)
At 34 C the volume/mass of R123
vapor is 0.126 cubic meters per kg, so for 5.76 kg the volume at 34 C would be 0.726 cubic meters. (from DuPont Thermodynamic Properties we've previously used)
Even if 20 L of liquid R123 were vaporized the volume at room temp would be 3.63 cubic meters, which is smaller than a typical bedroom closet.
Another reason to use Freons in small power generators is their low volumetric expansion rate compared to steam. While steam turbines need 10 or 20 rows of blades to extract all the energy from steam, (because steam expands a lot), turbines using Freons need only 3 rows max to allow the Freon vapor to return to room temp.
Finally, I like the oil burner,...very creative design that induces reverse flow of some of the combustion gases. I do wonder how long the soft steel he uses will last.
