TR Casual Discussion Çay Bahçesi
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2 sene önce IDEF'te görüşme fırsatım olmuştu, gözlemlediğim kadarıyla çok efendi bir adamdı. Bir Fatiha'yı çok görmeyelim.
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Sonuçlar açıklandı... Bulgaristan’da Türk Cumhurbaşkanı adayı kaç oy aldı?
Merkez Seçim Komisyonu, 7 siyasi parti ve ittifakın yüzde 4 seçim barajını aştığını duyurdu.
www.veryansintv.com
Beyler simdi durum Israildeki knesset teki arablar gibi mi olacak. oradasin, ama hic kimse sana yaklasmiyor.
Tornadoss
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Bro, aralıkta Prag'tayım. Sen başkentte mi tahsil görüyorsun?
Tornadoss
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Merhaba, yok ben Brno şehrinde yaşıyorum.
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Quite fascinating to me, this is standard procedure for boilers this size.
I am assuming this is wasp class LHD.
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What a joke.
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Why is it a standard procedure for boilers this size?
Risk of what?
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Need to introduce a heat source some way, there is no ignition system that works with these boilers as far as I know....given the working fluid is steam.
IIRC it has to do with the system not wanting to accumulate water in critical spots by condensation...that causes the design to be all weird compared to if you just use dry air like say gas turbine (and you just use a simple feed and ignitor + sustainer system)....or ICU (otto or diesel) its even simpler given its size.
That all affects the duration and method of ignition procedure available.
Maybe @Anmdt knows more?
If they film this, its gonna be SOP vetted.
Lighting the Boiler on USS Bataan
Painting, Acrylic on Canvas Board; by Kristopher John Battles; 2017; Framed Dimensions 29H X 27W
I will be watching this later, I just found it now:
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Yup, Wasp-class vessels are the only ones in the US navy to use this kind of steam boiler setup AFAIK except for USS Makin Island.
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I can't figure out what part is that they could be heating the fuel that ignites the boiler as well.Need to introduce a heat source some way, there is no ignition system that works with these boilers as far as I know....given the working fluid is steam.
IIRC it has to do with the system not wanting to accumulate water in critical spots by condensation...that causes the design to be all weird compared to if you just use dry air like say gas turbine (and you just use a simple feed and ignitor + sustainer system)....or ICU (otto or diesel) its even simpler given its size.
That all affects the duration and method of ignition procedure available.
Maybe @Anmdt knows more?
If they film this, its gonna be SOP vetted.
Lighting the Boiler on USS Bataan
Painting, Acrylic on Canvas Board; by Kristopher John Battles; 2017; Framed Dimensions 29H X 27Wwww.history.navy.mil
I will be watching this later, I just found it now:
But for anything that happens at sea, this is my reaction;
Sailors stick with old traditions that is proven to be safe and working. These procedures do not change unless a new one cames out or the entire system's working principle changes.
Anything is normal to me especially after once i have heard they have heated fuel pipes of a warship to keep it running in a cold climate after the actual preheating system has malfunctions. It could have been turned on in half hour or less but chief engineer didnt risk losing the engines (worse if they stops) and started the direct heating.
Hmm. Tamam, sagol.
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I will get around to hopefully asking a boiler tech later when they poke their head up....I am loosely acquainted with a couple of them elsewhere.
From what I know (very roughly), this kind of stuff is a bit of a dark art...that engineers (though we have "engine" in our name) cant really wrap their head around too well.
I watched drachfinel take on some of it....the area concerned I suppose is the fuel burner area...but this is very rough schematic of it:
View attachment 36138
Source vid (might be of interest to more ppl regarding boiler stuff and history):
I just think boilers this size have some preset issues with conventional ignitor...that is not very adaptable to different starting scenarios (so thats why you got lot of guys involved, looking and monitoring the port windows, ready to do small manual adjustment on the fuel feed rate at start etc).
I just remember a guy telling me about stuff involving a slow start process (you gotta do A, have A warm...to then do B....so B gets warm....and this is done sequentially to some letter way later)....since all the mechanisms governing it are all steam-run (so you got to do things very sequentially and slowly).
He is retired fellow of a (heritage) railway steam engine from my neck of woods in India....so they have to coax these engines in various ways each time....each one is a bit different now (with all kind of things they have made in the shop and retrofitted to help them over many decades). Different bits expand and compress a bit different.....different bits leak at different times while doing that etc. This all sets up the best practices in starting it up...and how to tinker and change those (on a day its grumpy and doesnt want to cooperate etc) if they dont work for some reason.
IIRC boilers in general (at large size) are this way as some pipe joints etc flex and fit slowly as temperature increased.
Startup procedure needs to consider things downstream (space and time wise) too ....it is bad if you get stuff (water) condensed there in certain joints (if you did hasty start up or shut down) and thats a nightmare to deal with big boilers (that you dont want to open up at any regular frequency)...especially if you want to use the system regularly in cycles.
So lot rests with the boiler techs doing the standard proven procedures like you say (if it aint broke, why fix it? etc)...including the ignition start-up (or large boiler action/setting changes in general).
Yup exactly! This philosophy extends even into aerospace in lot of ways that might surprise lot of people.
Not surprising at all.
Even with (large enough) diesel engines, stopping is a very serious issue here in Canada for example.
I worked at grain elevator company one time during my college years (summer job)....and the locomotives (shunters and also the bigger guys) there during winter would always be kept on idling...so they are ready to go...and not a cold lump of metal occupying a siding till warmer season lol.
Starting them up in dead of winter without a warm enough shed etc is just known to be too much issue heh.
Even during regular summer, they would just be left on idle a bunch where starting sequence would be too much of issue.
As the thermodynamic system gets even bigger (and involves a totally different working fluid material like water)...the "dark art" involved increases. Needs lot of people intimate with the system and its foibles.
convo chain might interest:
@AlphaMike @Joe Shearer @Gessler @Paro @Isa Khan @VCheng @Stuka Dive et al....in addition to regular Çay enjoyers already here.
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There are semi tractors that are never shut off for this reason too.
