Cylinder liner....
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From: Tzortzakakis Dimitrios on 9 Mar 2010 11:52 Of a large two-stroke diesel (similar to the ones that move ships, but here used for generating electricity). These engines are base-load, here in Crete, that means they run 24/7, on mazut (heavy fuel), and they need 11 tons of mazut an hour, 15,000 HP or 11 MW. After 6 months of continuous running, they shut them off, and replace worn out parts, pistons, valves, cylinder liners etc. I don't know when they replace the crankshaft. This engine runs at 120 rpm, btw. The piston is as large as a small table. I will take more photos of even larger, 70,000 HP diesels (50 MW) and large steam turbines with the same power, including the boiler, when I visit in September the new power plant, in Atherinolakkos. (There is a call for papers then, and my ex-professor invited me). This photo is taken BTW. with my old Kodak CX 7300. http://www.flickr.com/photos/44148682(a)N02/4420346944/?rotated=1&cb=1268152461125 -- Tzortzakakis Dimitrios major in electrical engineering mechanized infantry reservist hordad AT otenet DOT gr
From: Irwell on 9 Mar 2010 22:13 On Tue, 9 Mar 2010 18:52:12 +0200, Tzortzakakis Dimitrios wrote: > Of a large two-stroke diesel (similar to the ones that move ships, but here > used for generating electricity). > These engines are base-load, here in Crete, that means they run 24/7, on > mazut (heavy fuel), and they need 11 tons of mazut an hour, 15,000 HP or 11 > MW. After 6 months of continuous running, they shut them off, and replace > worn out parts, pistons, valves, cylinder liners etc. I don't know when they > replace the crankshaft. This engine runs at 120 rpm, btw. The piston is as > large as a small table. I will take more photos of even larger, 70,000 HP > diesels (50 MW) and large steam turbines with the same power, including the > boiler, when I visit in September the new power plant, in Atherinolakkos. > (There is a call for papers then, and my ex-professor invited me). This > photo is taken BTW. with my old Kodak CX 7300. > http://www.flickr.com/photos/44148682(a)N02/4420346944/?rotated=1&cb=1268152461125 Interesting shot, I wonder what sort of noise that engine makes?
From: Tzortzakakis Dimitrios on 10 Mar 2010 11:21 ? "Irwell" <hook(a)yahoo.com> ?????? ??? ?????? news:78hz8123c0m0$.1rqijtn75gku4$.dlg(a)40tude.net... > On Tue, 9 Mar 2010 18:52:12 +0200, Tzortzakakis Dimitrios wrote: > >> Of a large two-stroke diesel (similar to the ones that move ships, but >> here >> used for generating electricity). >> These engines are base-load, here in Crete, that means they run 24/7, on >> mazut (heavy fuel), and they need 11 tons of mazut an hour, 15,000 HP or >> 11 >> MW. After 6 months of continuous running, they shut them off, and replace >> worn out parts, pistons, valves, cylinder liners etc. I don't know when >> they >> replace the crankshaft. This engine runs at 120 rpm, btw. The piston is >> as >> large as a small table. I will take more photos of even larger, 70,000 HP >> diesels (50 MW) and large steam turbines with the same power, including >> the >> boiler, when I visit in September the new power plant, in Atherinolakkos. >> (There is a call for papers then, and my ex-professor invited me). This >> photo is taken BTW. with my old Kodak CX 7300. >> http://www.flickr.com/photos/44148682(a)N02/4420346944/?rotated=1&cb=1268152461125 > > Interesting shot, I wonder what sort of noise that engine makes? The noise and the vibrations are unbelievable. Imagine one million walnuts being crushed at once. These engines BTW are fired up with compressed air, no starter motor at these HP ranges. When on a modern ship, like Knossos Palace (Piraeus-athens to Iraklion), which has 4 Wartsila (www.wartsila.com) 12V46 C 4-stroke engines (12:number of cylinders In V 46 cm piston bore C compression ratio) you can easily tell when they fire up the engines, by the vibrations, or when it's in reverse, or even when they fire up all 4, when they want to cruise at full speed. -- Tzortzakakis Dimitrios major in electrical engineering mechanized infantry reservist hordad AT otenet DOT gr
From: Savageduck on 10 Mar 2010 12:36 On 2010-03-10 08:21:23 -0800, "Tzortzakakis Dimitrios" <noone(a)nospam.com> said: > > ? "Irwell" <hook(a)yahoo.com> ?????? ??? ?????? > news:78hz8123c0m0$.1rqijtn75gku4$.dlg(a)40tude.net... >> On Tue, 9 Mar 2010 18:52:12 +0200, Tzortzakakis Dimitrios wrote: >> >>> Of a large two-stroke diesel (similar to the ones that move ships, but >>> here >>> used for generating electricity). >>> These engines are base-load, here in Crete, that means they run 24/7, on >>> mazut (heavy fuel), and they need 11 tons of mazut an hour, 15,000 HP or >>> 11 >>> MW. After 6 months of continuous running, they shut them off, and replace >>> worn out parts, pistons, valves, cylinder liners etc. I don't know when >>> they >>> replace the crankshaft. This engine runs at 120 rpm, btw. The piston is >>> as >>> large as a small table. I will take more photos of even larger, 70,000 HP >>> diesels (50 MW) and large steam turbines with the same power, including >>> the >>> boiler, when I visit in September the new power plant, in Atherinolakkos. >>> (There is a call for papers then, and my ex-professor invited me). This >>> photo is taken BTW. with my old Kodak CX 7300. >>> http://www.flickr.com/photos/44148682(a)N02/4420346944/?rotated=1&cb=1268152461125 Interesting >>> >> shot, I wonder what sort of noise that engine makes? > The noise and the vibrations are unbelievable. Imagine one million walnuts > being crushed at once. These engines BTW are fired up with compressed air, > no starter motor at these HP ranges. When on a modern ship, like Knossos > Palace (Piraeus-athens to Iraklion), which has 4 Wartsila (www.wartsila.com) > 12V46 C 4-stroke engines (12:number of cylinders In V 46 cm piston bore C > compression ratio) you can easily tell when they fire up the engines, by the > vibrations, or when it's in reverse, or even when they fire up all 4, when > they want to cruise at full speed. Yup those are huge, but they are dwarfed by the monster Wartsila RT-flex96C; < http://www.wartsila.com/Wartsila/global/docs/en/ship_power/media_publications/technical_papers/sulzer/rtflex96c_containership.pdf > The scale of some of the marine diesels has to be seen in person to be believed. Some years ago, through work, I became acquainted with a ship's agent in the SF Bay area. He had to have parts for an engine repair shipped to his yard, to await the arrival of the freighter they were needed for. These parts included a piston, cylinder sleeve and a valve. The sleeve was some 18 ft high and weighed several tons. The valve looked just like a normal automotive valve, with the exception that it stood about 8 foot tall, and weighed in at about 2500 lbs. I was able to go aboard the ship when it arrived, and I was amazed by the engine room. it would have put a surgical cleanroom to shame. The offending cylinder had been disconnected from the drive shaft to allow the ship to proceed for repairs. The access to the cylinder was through door sized hatches. I am still amazed by the scale of that engine (a B&W MAN marine diesel, it was considered average size!) I wish I had my camera with me for that opportunity. -- Regards, Savageduck
From: Vance on 10 Mar 2010 13:34 On Mar 10, 9:36 am, Savageduck <savageduck1@{REMOVESPAM}me.com> wrote: > On 2010-03-10 08:21:23 -0800, "Tzortzakakis Dimitrios" <no...(a)nospam.com> said: > > > > > > > > > ? "Irwell" <h...(a)yahoo.com> ?????? ??? ?????? > >news:78hz8123c0m0$.1rqijtn75gku4$.dlg(a)40tude.net... > >> On Tue, 9 Mar 2010 18:52:12 +0200, Tzortzakakis Dimitrios wrote: > > >>> Of a large two-stroke diesel (similar to the ones that move ships, but > >>> here > >>> used for generating electricity). > >>> These engines are base-load, here in Crete, that means they run 24/7, on > >>> mazut (heavy fuel), and they need 11 tons of mazut an hour, 15,000 HP or > >>> 11 > >>> MW. After 6 months of continuous running, they shut them off, and replace > >>> worn out parts, pistons, valves, cylinder liners etc. I don't know when > >>> they > >>> replace the crankshaft. This engine runs at 120 rpm, btw. The piston is > >>> as > >>> large as a small table. I will take more photos of even larger, 70,000 HP > >>> diesels (50 MW) and large steam turbines with the same power, including > >>> the > >>> boiler, when I visit in September the new power plant, in Atherinolakkos. > >>> (There is a call for papers then, and my ex-professor invited me). This > >>> photo is taken BTW. with my old Kodak CX 7300. > >>>http://www.flickr.com/photos/44148682(a)N02/4420346944/?rotated=1&cb=12... > > Interesting > > > > >> shot, I wonder what sort of noise that engine makes? > > The noise and the vibrations are unbelievable. Imagine one million walnuts > > being crushed at once. These engines BTW are fired up with compressed air, > > no starter motor at these HP ranges. When on a modern ship, like Knossos > > Palace (Piraeus-athens to Iraklion), which has 4 Wartsila (www.wartsila..com) > > 12V46 C 4-stroke engines (12:number of cylinders In V 46 cm piston bore C > > compression ratio) you can easily tell when they fire up the engines, by the > > vibrations, or when it's in reverse, or even when they fire up all 4, when > > they want to cruise at full speed. > > Yup those are huge, but they are dwarfed by the monster Wartsila RT-flex96C; > <http://www.wartsila.com/Wartsila/global/docs/en/ship_power/media_publ... > > > > The scale of some of the marine diesels has to be seen in person to be > believed. > > Some years ago, through work, I became acquainted with a ship's agent > in the SF Bay area. He had to have parts for an engine repair shipped > to his yard, to await the arrival of the freighter they were needed for. > These parts included a piston, cylinder sleeve and a valve. The sleeve > was some 18 ft high and weighed several tons. The valve looked just > like a normal automotive valve, with the exception that it stood about > 8 foot tall, and weighed in at about 2500 lbs. > > I was able to go aboard the ship when it arrived, and I was amazed by > the engine room. it would have put a surgical cleanroom to shame. The > offending cylinder had been disconnected from the drive shaft to allow > the ship to proceed for repairs. The access to the cylinder was through > door sized hatches. I am still amazed by the scale of that engine (a > B&W MAN marine diesel, it was considered average size!) I wish I had my > camera with me for that opportunity. > > -- > Regards, > > Savageduck- Hide quoted text - > > - Show quoted text - My fist degree was Marine Engineering and all these powerplants were just specs until I saw one being installed at the Bath shipyards in Maine. All those numbers became very solid reality when faced with a 2 story hunk of metal. Admittedly, this powerplant is over the top, but the smaller ones are awfully damned impressive themselves. This video shows the inspection hatches and gives the figures for bore, stroke, etc. http://www.youtube.com/watch?v=jXHvY-zY9hA&feature=related Vance
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