Re: DetroiTug's Tug is going together
Posted: Thu Oct 13, 2011 4:05 pm
The new valves definitely did the trick on the economizer. Took her out about a week ago and that is the best it ever ran. We made a nice 40 mile trip up the Detroit River. We ran in between 50 - 60 psi most of the day.
Learned more about firing it which is making even more improvement. The draft in the door is totally closed off now. I can say that pulling all the combustion air through the grate with wood is definitely the most efficient burning wood - in this boiler anyway. Also there was a slight gap between the grate and the ashpit in the door area that I blocked off, now any air that comes in has to go through the grate area. The boiler was definitely performing better and with the economizer, no pressure was lost while taking on boiler water.
We did get a pressure issue when we whistled for the swing-bridge to open on Grosse Isle's north end. We had to wait about 30 minutes and I let the fire die down to maintain an idle pressure/steam production. The bridge keeper yelled down they wait 30-45 minutes to open the bridge. So we tried it while it was closed and made it through with about 3" to spare, rather tricky with the 2-3 mph current through there. Then when we got under way again, and I had to try and get pressure back underway. Some good dry pine took care of that, and pretty soon we were happily clacking along up over 50 psi. Getting very close with the tweaks and understanding how to operate it. I was a bit concerned about traveling up the river as the current is quite swift in some areas, but Chief marched right through undaunted.
Also learned on taking on feedwater, it's not necessary to close the bypass fully. Leaving it cracked a little bit seemed a much more constant and stable input.
-Ron
Learned more about firing it which is making even more improvement. The draft in the door is totally closed off now. I can say that pulling all the combustion air through the grate with wood is definitely the most efficient burning wood - in this boiler anyway. Also there was a slight gap between the grate and the ashpit in the door area that I blocked off, now any air that comes in has to go through the grate area. The boiler was definitely performing better and with the economizer, no pressure was lost while taking on boiler water.
We did get a pressure issue when we whistled for the swing-bridge to open on Grosse Isle's north end. We had to wait about 30 minutes and I let the fire die down to maintain an idle pressure/steam production. The bridge keeper yelled down they wait 30-45 minutes to open the bridge. So we tried it while it was closed and made it through with about 3" to spare, rather tricky with the 2-3 mph current through there. Then when we got under way again, and I had to try and get pressure back underway. Some good dry pine took care of that, and pretty soon we were happily clacking along up over 50 psi. Getting very close with the tweaks and understanding how to operate it. I was a bit concerned about traveling up the river as the current is quite swift in some areas, but Chief marched right through undaunted.
Also learned on taking on feedwater, it's not necessary to close the bypass fully. Leaving it cracked a little bit seemed a much more constant and stable input.
-Ron