Originally Posted by pickles
This is probably the coolest build on here! Do you know which breweries use the Jetstar?
No, I don't. I am gonna look now though. You have me interested.
Originally Posted by beerthirty
Most impressive. Do you plan on welding it together or making it threaded for ease of cleaning? I take it you will have 2 fittings in the bottom of the keg to pass the steam through?
The main section will be welded together so the steam chamber and the exchanger tubes will be sealed and separate. The end plates are being laser cut now. I hope to get them soon.
The top "hat" section will most likely have a fitting it screws into for clean ability. Other then that it wont need to be taken apart any further. The tubes will be cleaned using a bottle brush and the rest can just be washed. The way I plan on welding the top to the cone and the input line it should be totally sealed so just the outside needs a washing.
"I think" on this one I am going to run the steam input down through the top. My thinking is this will give me a couple things. 1. the input line can have the fitting on it to secure the hat section to the main body. 2. It will reduce the opening size a little more so the boiling wort will want "out" with more force. Keep things nice and hot in the exchanger. Also since I have already boiled using the copper coils, I noticed the input line during the boil. Since it came in from the top, the water around it also boiled and it boiled first at the surface. Allowing boiling action inside the reduction area as well. Since I am not going to pressurize the kettle like they do on the Jetstar I am hoping this will help to get more close to their process.
The other reason I don't really want to come in with the steam from the bottom is the chance of steam condensing in the delivery line. My boiler has some height to it and I would then have to run the steam line down and then back up. My fear is this would create blockage with the condensate. That would create pressure buildup till the blockage was cleared and I believe it would rob precious energy from my steam. When running the boil, the beauty of this system is very low pressure and very low water volume. I don't want to increase the pressures any more then they are. Which is 5 psig. During the mash the superheated steam will run 0 psig.