Big Jim posted:So, Steve, if your engine that has 380° water had a FWH and it was introducing that same 200° colder water, it wouldn't lose pressure? Maybe you need to use some common sense and have a long think about what you are saying instead of believing the myth that you so fervently want to hold on to! Now let's see, even at 380° - 200° equals 180°. I am not sticking any part of my body in that RELATIVELY COLD WATER!!!
You really do need to go dig out your ICS books and re-educate yourself.
ARE YOU KIDDING ME BIG JIM?? Have you ever once even operated an injector? I don't have to believe in any myths. I have the EXPERIENCE!
An open safety valve will release far more steam than my little injector, but I can probably lower the pressure faster using the injector than the safety will. WHY IS THAT??
Why do you think the check valve is placed so far forward on the boiler on most engines? Would the fact that injecting cooler water into the boiler farther away from the firebox will allow that water time to warm up and circulate, instead of shocking the boiler if it's injected right next to the firebox?? Because it's um...200 degrees cooler, and boilers don't like to expand and contract much. You do believe steel can expand and contract when exposed to differences in temperature of 200 degrees, don't you?
And BTW I'm not talking about a feedwater heater. I'm talking about the injector. INJECTOR. I'm talking about using an INJECTOR.
So, howzabout I'll pull some quotes from the ICS coursebooks tonight, or Grimshaw, or McShane, or Kirkman, and we'll compare notes.
