Man.. call me stupid if you want, but I was really shocked when I just learned that the boiling point of water varies, and is determined by different locations' atmospheric pressure 😲😱
@@usamamohammed2357the boiling point itself doesn't really change, it change for someone on the ground,(persepective) but it's okay as the meausres we have is based on the ground(sea level), which make it look like boiling point is changing
5:50 Water increases in pressure and kinetic energy 5:58 It's not the impact that converts kinetic energy to pressure, the volute just collects and guides the flow in a way to avoid losses as much as possible. 6:12 This is a mistake. When the pump operates at its design flow rate, the pressure is actually pretty much uniform over the whole 360 degrees of the volute. The pressure then increases in the diffuser, where the cross-section raises, and so the velocity diminishes while the pressure increases according to Bernouilli. The cross-section of the volute does increase, but it gradually collects the whole flow from the impeller. It follows the conservation of angular momentum: "The diffusing elements have to be designed so that the flow field in the collector is compatible with the conservation of angular momentum. If the angular momentum is conserved, rotational symmetry around the impeller is achieved and interaction between the flows in the collector and impeller is minimized." 9:18 Cavitation will also appear first at the leading edge of the impeller. The blades are blocking the flow passage, water accelerates, pressure drops, and cavitation may appear. Good job! Covering everything in 10min is a challenge :D
3:05 That’s called a concentrated winding, but that’s not how the windings of the stator of a three-phase induction motor are usually made. Instead, another type known as distributed winding is much more commonly used.
As a ChemE (and somewhat-recent subscriber) I love seeing content like this that breaks down intricate concepts into easily understandable bites. Would love to see your take on differing pump seal technologies, maybe even mag-drive?
Bro! Respect for you to making these videos, you explaining very clearly and going inside to the parts, its amazing 👏 I love it, cuz im learning 🙂 Im fan of yours buddy👍
Such a incredible video dude.i have learnt so much from this even though i am from electrical side but the way to demonstrate the video mechnical parts was so amazing.keep it up bro
Awesome video... well only I couldn't understand how water gets boiled inside suction inlet.. how can we avoid this situation by automatically turn off the pump when suction source water tank gets emptied or there is a pipe choking from trash or pipe pinching in suction line?
Mate, I love your YT channel. You explain something with lots of details, and your animation, man! Thanks for explaining me 3 phases motors, the colors, the motion, the flow, you're the best.
what an awesome video. I'm currently working in the engine room of a ship and will be studying marine engineering next year. These videos allow me to make the most of being in the engine room to learn stuff!
Thank you for this valuable videos. Despite i am not an engineer I really learnt from this. Appreciated if someone explain more details about NPSHA and NPSHR examples mentioned in this videos. In the first scenario (08:23), why NPSHR = 4, NPSHA = II and we make the conclusion that "NPSHA is sufficiently greater than NPSHR, pump should be OK. In the second scenario , why NPSHR = 13, NPSHA = II and the conclusion was made is that "NPSHA is less than NPSHR, pump will not be OK. Thank you.
*THE LAD is a bit wrong here:* during boiling it is not "air" bubbles but rather vapour babbles (there is not a lot of air diluted in water even if it is "oxygen-rich").
Great video but the motor doesn't have to be electrical. I have worked with several different pumping systems and have used steam motors a lot as well as hydraulic motors.
@@kevinmaphupha The Hydraulic systems used a power pack system that was either diesel driven or electrical, or combination with a motor connected straight to the shaft of the impeller. The Steam pumps got their power from steam turbines through a reduction gearbox. Steam coming from a large boiler.
Excellent graphical representation of cavitation. The damage looks like pitting and when it gets real bad it looks like someone removed chunks of material from the pump casing with a suction cup as there is no impact damage. I've seen this during my time. It can happen in fluid film bearings and throttle valves as well.
I particularly love those engine working principles videos. It's so satisfying to understand clearly how things happens. You are amazing. Keep going, man!
Hi. I am Kazi Tawheed. A content creator from Bangladesh. I like your videos. I want to convert your videos into Bengali and make the videos understandable to the people of our country. And if you allow, I will upload you in my video with full credit and channel link.
@@EngineeringMindset ārita karabēna nā. Please allow. You will not be harmed. Rather, the people of our country will understand your channel. Don't turn them away from such a beautiful thing.
There are no subtles on the video, it is an overay that you have turned on yourself. You can turn them on and off from your device only. Additionally you can move them across the screen to a better position if they cover up text.
why the head for every liquid is constant. suppose if there is very very high density liquid is being pumped to a head of 100m. then the pressure just at the end of casing of pump, the pressure energy will be very high. but liquid with less density will have less pressure energy .
What is most likely reason a centrifugal cooking oil pump will have high thermal imaging temp near the bearing closest to the impeller, and only run for 15 seconds before flipping off the 20A breaker (for a 3 HP 3420 rpm motor)?
VERY LEARNER FRIENDLY VIDEO CONGRATULATIONS., CAN CENTRIFUGAL PUMPS RAISE WATER TO HIGHER LEVEL, WHAT CAN YOUR RECOMMEND FOR EXAMPLE A HEIGHT OF 80M-100METERS,. THANKS
I have a motor pump that rotates but can not suck the water from the tank 5m away and transfer to the intended position? What would be the problem and solution for it?
Hey Paul, Hope you are well. Just have I think you help me out. We have 3 chilled water centrifugal pump 75 kw controlled by VFD. All 3 are working at 25Hz and 2 of the pump is taking 45 Amps approx but 1 is taking only 28 Amps. Is there any issue with the 1 pump. If, what are the possible cause for running on low Amps. Thanks,
It might be a regional thing, but I have been servicing centrifugal pumps for several years now and have yet to see one with a gland and stuffing box. It is my understanding that this is a very old way of sealing a shaft and has been completely superseded by spring loaded mechanical seals
Same here! it's like, shit, those 6 calculus courses and vibrations classes and signals etc. filled my head with a lot but they didn't teach me how a motor or pump works! Well, I mean they *technically* did but that's not the same thing!
