Have you ever wondered where ships get their fresh water supply? Well, it comes from sea water. Ships convert it to fresh water by means of... Chief MAKOi Study Call Ep 04
Hi guys! I'm still stuck at home due to travel restrictions brought about by the pandemic. I'll be doing these lecture videos for the meantime for those of you who are interested in learning a bit about the technical aspect of seafaring. We'll get back to regular programming once things get sorted out. Thanks and enjoy!
Hi Chief Makoi. What keeps the salinometer calibrated for accuracy to keep the fresh water under 10 PPM? What if it goes out of calibration during operation? Does someone test the water to see if it drinkable?
Usually we just replace it if it starts acting up. In any case, as long as it doesn't deviate too much, it won't pose too much of an issue. There's a few more processes before the water becomes drinkable.
Dear Chief Makoi, I only discovered you as a RU-vidr after the EVER GIVEN incident, but I have been very deeply impressed with your posts since then. And believe me, I have seen a lot of 'em ! I have been a Master Mariner (in command) for nearly 28 years, and voluntarily retired from sailing with Wilhelmsen in 2017 once I turned 60. However, this is the very first time that I have come across a site like yours. Extremely informative, straightforward, and completely free of all bullshit. I congratulate you, Sir, and wish you more power in your future endeavours. My only regret is that I did not get a chance to sail with you. You have a diehard fan in India !
first of all thanks to chief, as a boiler technicain my question is to you, is it possible to use thia as a methanol distinction system. methanol boiling point is 60 degree.
Chief, first of all I appreciate what you're doing for giving us mariners "free training". I went to PMMA myself class 85, deck side. Right after academy I was fortunate to be enlisted in the US Navy and worked as an electrician. After the Navy, I applied as a marine electrician thru Seafarer's International Union of America (SIU). I became an Unlicensed Junior Engineer. After having 1,008 days seatime, I was able to take the 3rd Engineer exam given by the US Coast Guard. Your training videos help me a lot in understanding the engineering plant. It enhances my knowledge to be able to perform my job as an engineer. Knowledge is power, indeed. I'm sure many aspiring mariners benefit from sharing your knowledge. Thank you.
Barking Doggai: Amen to that Sir. A retired engineer, I was well acquainted with the theory, but the details of how it is actually implemented is quite interesting to me. As you say never, ever too old to learn. Hang in there! Being 78, you give me hope!!.
I was stationed aboard a US Navy repair ship as a machinist mate and worked in the engine room. My ship had a consolidated engineering plant (boilers & turbines) in the same space. We had two triple effect evaporators that used 250 psi superheated steam and could produce 72,000 gallons of fresh water in 24 hours @ .025 ppm. our potable water was the same purity. Our boiler feed water was treated with a corrosion inhibitor and was stored separately. I've been watching your channel a lot. We had 550 officers and enlisted with 50 men assigned to the engine room. Thank you.
Top notch Chief. Your graphics and editing are truly professional. As a former Navy snipe, you did an excellent job of explaining the process. I learned quite a bit. Keep up the great work! Us former snipes that spend all our time on the beach really look forward to your videos.
I was a machinist mate stationed on a steam powered navy guided missile cruiser. We had 1 distilling plant in each engineroom and used 600 psi steam to power our distilling plants. It was a 2 stage plant that made 500 gallons an hour with less than .01% salinity. Our plants had insulation on them to retain heat. Awesome Videos Chief Makoi!
Excellent tutorial ! Thank you. I worked in an Oil Refinery for 41 years, where fresh water recovery is very important in refining, as chemicals and processes in making water fit to make steam (Boiler Feed Water) are very expensive. All refineries use massive amounts of steam.. As in what you show us also, we tried to recover as much waste heat as possible. Best Regards. Trinidad & Tobago.
@@predoscica Yes we did, but there are losses that are unavoidable........leaks, sour condensates, hard boiler blowdowns, small reciprocating pump exhausts, etc.
I have to be honest, this is actually my first time hearing about ships converting salt onto fresh water. I thought they resupply on port and comeback to port if the water has gone to minimum. This is very informative, thank you!
Likewise. As an inveterate landlubber I'd never given any thought to this! After all, why should I? But, now that you mention it, it makes sense. I thought it'd be just simple distillation - at least until you introduced the complications. Nice simple presentation. I like that. I (more than) suspect you've glossed over a lot of the really tricky bits but this is a marvellous introduction and one that I could see being adapted for smallscale onshore usage under certain circumstances Thanks. Subscribed.
Chief, thanks for your educational video! My wife and I were just discussing this then I found your video! I knew there was a desalination plant on ships but didn't know how they work. Keep the great vids coming!
Chief, another great video for my high school physics classes, I'll use it with my thermodynamics unit. I especially like how you 'snuck upon' how to boil water below 100°C , using an eductor to lower the ambient pressure at the condenser, classic use of an descrepant event to understand why. That's what makes for good teaching! If your travels bring you to southern California, my classroom is open for you to visit! Chris Peoples
Thanks Chief! Much appreciated. Enjoy the time home with your family and be happy you aren’t stuck on a contract far from home. You have to feel for those sailors. Or the guys on the cruise ships, where the company has canceled their contracts and paid them off but they can’t leave the ship. I’m grateful to be home and so far safe. Best to you and your family.
I sailed for six years with the US Merchant Marine, but I was deck crew and had no clue idea how fresh water was generated. This was a fascinating introduction to what is at it's base a simple process, but is phenomenally complicated in truth. It has been 50 years since I felt a rolling deck under my feet, and truth be known I miss it a lot. Thank you so much for providing us for such a deep dive into fresh water generating systems.
I'm a bit late, but I enjoyed the vid, Chief! I worked on a 3 stage EVAP unit which used stream from our 125 psi boiler to create the vacuum. It was a ballet style juggling act to keep the two running in harmony (the boiler and the evaporator). The USN had given us parts from a Yugo expecting us to make them work like a Cadillac... 😎. Lots of good memories that I wouldn't trade for the world. Thanks again, Chief. P.s. if you ever stop in Guam, hit me up👍🏽
I am not voyager but your vlogs have been major reason why I started developing interest in Marine Engineering.You guys are doing amazing job , keep up the good work.God bless everyone.
Excellent description. I worked with distillation plants in the Navy. They were 1950's era two stage flash type 12,000 gallon per day. Old tech, left over in a newer ship, but worked exactly the same. Thanks for making these videos, they are very enjoyable.
Been there too! Loooong time ago. USS Kirk (FF-1087) & USS Hepburn (FF-1055). I remember having to double check the accuracy of the salinometers by putting a reagent in a measured sample of potable water then titrating another reagent in the sample and counting the drops needed to affect a color change to indicate salt content.
Great channel. When I was an BT Engineer in the Navy 45+ years ago we used steam evaporators. When I went in Merchant Marine we used Alpha Laval units under vacuum but we weren't supplying a 520 man Navy crew and Boilers/Steam plant.
Chief Makoi kahit hindi ako marine engineer or related sa marine. Nanonood talaga ako sa vids mo dahil very informative tas ganda ng boses mo pakinggan.
That was very interesting. Since I work on swimming pools. We work with venturis and pumps. Yet we use the salt to produce chlorine through electrolysis.
Man, I love your channel. You started talking about the combined gas law and my ears perked up... I'm a critical care paramedic and have to know these laws for ventilator patients. Never really thought about their application outside of a medical environment and I was glued to the screen! I hope you're back on the waves by now, now that the pretendemic is losing steam.
Its a good initiative from u thank you so much Engineer it's so great from you to explain how do every equipment work like pumps separators ... You here in this course give a #professional #experienced #lessons #not #an #academic #ones (like what you will finde as difficulties as a beginer engineer ..for example: in the Cooling circuits what are the frequent problems and what do you advice to handle with it ..not just how do it work ) Also I requeste you to do a parallel courses about #steam #propulsion #systems with the diesel ones Thank you chef
Thanks for this understanding vidéo now I know by you, how they bring the fresh water on the boat thank you again... We still satay for the pandemic go away... Thankx...
One of the first tasks I learned after reporting aboard my first US Navy ship was how to clean salinity cells (salinometer sensor). This was a common task, as we had them to monitor water quality for both Auxiliary (fresh water) and Propulsion (boiler feed and condensate monitoring). Obviously, I was stationed on a ship old enough to have a 600-PSI steam turbine propulsion plant. Will you eventually be covering the additional treatment required to make the distilled water from the evaps safe for human consumption? Filtering, chlorine/bromine/UV, mineral replacement, etc.?
pure 0ppm distilled water is already the safest water you can consume. The moment you start adding crap to it, you simply ruin it. Minerals are not needed in the water, since you get more than enough from your daily meals.
@@johnhighway9397 I was on the USS Brush (DD-745). I was the Comm Officer, but cross trained in engineering. Do you remember where the fresh water holding tanks were?
I'm an old fellow long retired from dealing with ultra pure water systems and heat exchangers deionizer scrubbers and conductivity meters. We have a small water still but we accepted condensate water from a power plant by the truckload and scrubbed it further for our ultra pure systems. We had to make sure we didn't scrub it too much cuz otherwise the water got too hungry for minerals and ate the elbows out of copper pipe systems. All land based work. Nevertheless I actually learned a lot from this video. Thank you so much!
Thanks chief makio for sharing you knowledge to us its a big help for me as a 2nd yr BSMAR-E student❣️ stay safe and god bless you at all the time sir🙏🏻❤️
Hey Chief, thanks for the videos. It's a great reminder when I'm still waiting for my first trip as a qualified EOOW. Out of interest, does the type of generator you used in the video have vacuum breaker nozzles? And why do we need to open them when the plant is shut down? And I'd definitely be interested in seeing a video on seawater/HT water treatment. Thanks again!
I got to see the fresh water distillation system on the museum ship, USS North Carolina during one of the special educational tours last year. When I read that her sister ship, USS Washington used 45,000 gallons in one day during operations in WW2 (extreme high end of the spectrum) I was amazed.
Chief Makoi, Absolutely fantastic stuff. I don't remember sharing a story previously, but here goes. My father was a Journeyman Ship-Wright and served in the Royal Navy during WW2 and private boat/shipbuilding afterwards. One story I remember him telling me was that when ships were in port and or dry-dock, crews would open the boilers and have to use chipping hammers and chisels to descale the boilers and I'm sure various associated piping. On one occasion that he was aware of, at the end of a shift and almost finished cleaning, most of the crew left except one to complete the work. The next crew came on and called out to make sure everyone had exited the boiler and the boiler was ready to close up and be fired up to which they did. The last worker did not clock out and did not arrive home. The alarm was sounded and they drained and opened up the boiler. Inside was the body of the last worker. Since they called out prior to closing the boiler, they believe the man took a break and fell asleep! My father said that very likely happened many times through the years on different ships. These days there are many safety procedures in place to minimize such things happening. My question to you is: Even with all the modern boilers and systems, you must still get scale buildup and need to clean it out. 1) What area's of the ships systems are prone to scaling up and sediments buildup that still requires de-scaling and cleaning? 2) What automatic systems if any does a ship have in place to prevent and or control scale and sediment buildup, or 3) What process do you have to conduct an inspection and de-scale water systems, etc. If anyone else also knows of any systems and or procedures, I would love to learn about them. I can be reached at >> lisabook2017@gmail.com Cheers
Nowadays, Boiler water is strictly tested and monitored and treated to make sure that scale build-up or corrosion will not happen or at least be minimized. In case of work in enclosed spaces, there is a working permit and safety protocols to ensure that prior to closing, everyone involved in the job is accounted for.
Terima kasih chief, karena video penjelasan dari anda. Saya bisa menyelesaikan revisi dari pak winarto edi sebagai dosen penguji saya. Arigato gozaimasu.
Sir sir sir. Thanx sir I am from India and sir I am a electrical cadet . I saw yr all videos.... Nd salute to yr effort.. this is outsating effort of video editing nd u are the best marine teacher in this word. U prove yrself by this video. There are planty of videos for life at sea. But not of technical videos... I am requesting u to make this kind of videos. Love u sir ...God gives you 115 years of long life... U are the best... U can mention my name on yr channel I feel glad.. nd I request u to make 1000 videos for technical side nd Technicial defect... Love u sir nd love yr kindness nd effort
At 5:06 I was thought exact the vacuum boiling! But the engine jacket water using was very clever idea then for vacuum creation eductor nozzle method was also good
This is cool to learn about just cause, when we develop Space Faring ships I betcha we'll get water in much the same way. Recently Space Science has proven theirs more water in open space than we ever thought!
Spent my 14 years at sea steaming Caird & Rainer, 2 stage flash evaporators. 2 tons per day perhaps....starting them was an art. Gas turbine propulsion with 8 bar LP Sat steam auxillary boilers to feed the evaps and lub oil heaters.
Thank you Chief Makoi for teaching me, I look forward to your lecture, you have made the hardest things simple and I can't thank you enough...I can proudly call u my lecturer
Also iirc reverse osmosis needs "consumable" cartridges/mediums, so essentially it generates waste, whilst these distillation plants are all vessels and tubes which can be scrubbed/cleaned
It's less energy efficient, however waste heat from engine cooling is is a cost you have already paid for regardless of if you are going to use it or not. But you can't run a reverse osmosis plant off of that, reverse osmosis plant requires a strong pump which would one way or another be an additional fuel cost.
Hey Chief, I'm planning on some day becoming part of the engineering crew of a cargo ship... I was wondering if you had an email or something I could reach out to you with questions to help me get started? It'd help a lot
Here is a reading list 'www.marineinsight.com/guidelines/top-7-important-websites-for-marine-engineers/' I am not an engineer, but it is a favourite interest of mine. Best wishes
@HoboWild YOU MAY NOT HAVE HEARD THE WORDS "MENTOR AND MENTORSHIP". DON'T STOP HIM FROM ASKING QUESTIONS. MARINE ENGINEERING IS UNLIKE OTHER PROFESSIONS, YOU REALLY NEED A MENTOR OTHERWISE YOU WILL REGRET OR PASS THROUGH HELL. AM A MARINE OFFICER.
Thank you so much for your complete and thorough explanations . The verbal, graphic and visual material is very thoughtful. Always looking for more explanations to be more efficient at work and yours fill that requirement and help me put that information together with the theoretical knowledge from all the relevant textbooks. Safe seas and contract on your next voyage . My thanks from Panamá .
This was awesome! I remember, when serving on the Polar Star, we had sea showers in warm water, but the evaps worked much more efficiently in Arctic waters, and we could take longer showers.
Thank you so much chief, very informative for me as a deck Cadet. My Chief Engineer struggled a bit to make me understand the concept, but with your illustration,its spot on. Looking forward for more. Safe Sailing
From a landlubbers perspective, this was well done. Just enough cheesy graphics to keep people's attention and since I like cheesy graphics, I approve. I also learned alot in just ten minutes, so bonus!
Wow! I am truly impressed with your video about distilling sea water. Your knowledge is awesome. The visual aides were perfect. Everything you spoke about, especially the eductor and lowering the pressure in the chamber was 100% spot on. I have been watching your videos for the past couple of weeks, and I enjoy every one of them. You are showing me things that I would have never learned without your fantastic videos. I have a lot of respect for you, and please keep the great videos coming, and be safe.
