Circulating pump: What is it & why is it important?

[@EngineeringMindset]

*These videos take a long time to make* if you would like to buy Paul a coffee to say thanks, link below: ☕ PayPal: www.paypal.me/TheEngineerinMindset Channel membership: kzbin.info/door/k0fGHsCEzGig-rSzkfCjMwjoin Patreon: www.patreon.com/theengineeringmindset

[@icemanluke1]

Hello Paul! Please make longer videos I love your work and wanna watch more

[@kg-Whatthehelliseventhat]

Would these be used in espresso machines?

[@timbro71]

I have worked in the pump industry for over 22 years and that was the best explanation of how a centrifugal pump impeller operates I have heard. Well done mate

[@RedRyan]

Wow! I've never had anyone explain an impeller and such a great way, I didn't know it was actually centrifugal force pulling the water away from the center that caused the whole thing to work. Thanks so much for your help I was interested because I'm at an Airbnb that has a water circulating system and I was wondering why the shower was instantly warm.

[@yurizhivago4848]

Those pumps are used for huge boilers in hospitals etc and can be multistage where one impeller feeds water to another one to get even higher pressure. I worked in a hospital with steam boilers and we needed really high pressure to feed water into the boiler and had multistage pumps.

[@supjay3945]

So no external power needed?

[@pantherman3]

Watch your videos all the time man. I have done so well on interviews because of you thank you!🙏

[@dasfahrer8187]

Man, I've learned so much about things that I didn't even know existed, much less what applications they were used for. Thanks for doing these videos!

[@Kineth1]

I recently bought one of these for my home hot water. It includes a neat temperature-activated valve that goes under a sink, and bridges the hot line to the cold, enabling water to return to the tank until the hot supply at that faucet gets up to temperature.

[@dasfahrer8187]

Have you noticed an energy cost increase at by installing this? It seems that by circulating the water throughout the pipes in the house that you're exposing the water to more heat loss than it would had the water just been left in the tank, thus creating the need for the tank to be on for a longer period of time and turning on more often.

[@icarojapan]

Nice. Looked into something like this a few years ago. I have a simple Grundfos circulation pump transferring the hotwater from a heat pump to the furthermost hotwater tap. Saves a lot of wasted water waiting for hot water to arrive from the heat pump tank.

[@Kineth1]

@@dasfahrer8187 I haven't run it long enough to make a meaningful comparison. The pump also has a built-in timer so you can easily set it to only run at scheduled times. That way you're not constantly heating the loop. From a strictly mathematical standpoint, it will raise the energy consumed. Both from the increased amount of water being heated, and the energy consumed by the pump. It is literally a matter of paying a little bit more for added convenience (no hot water wait time during scheduled hours).

[@dasfahrer8187]

@@Kineth1 Thanks for the reply. Will have to keep one of these in mind when I replace the water heater.

[@danielkarlsson608]

@@dasfahrer8187 Grundfos has a pump for this with built-in timer and thermostat to keep electrical cost down. If you have access to the pipe you can insulate it to reduce the losses. It will also save water.

[@jacksonhaynes671]

I appreciate the simplified version of this video!

[@mikechiodetti4482]

Very good explanation and with movement in the video, easy to understand. Thank you.

[@AnasAl-Dhafiri]

Thank you for your useful information and videos. Good luck

[@CommercialGasEngineerVideos]

Thanks again for your efforts. What a channel.

[@nsgaming5276]

Does any of these pumps need oil to be added? every winter season

[@yurizhivago4848]

Great video and very easy to understand for your average layman. I worked with huge pumps for boilers and chillers in a hospital and know all about them.

[@Electronzap]

Good description!

[@808_scott6]

What a great video explaining it. 😊

[@jeffsadventures1]

Thank you for this video

[@UnicornDolls]

Thank you 🙏☺️ ❤️❤️❤️

[@UBsLab]

Your Videos are great 👍

[@jbrise7560]

Good to know! 👍

[@tomg721]

Nice description

[@Zendukai]

We have a lime system, in our process effluent plant the lime circulates around a ring main pipe system, reason is, if the lime stops circulating, the pipes will block. If the pH of the liquor drops on the pH probe, the computer system program (IFIX) will put a shot of lime into the reactors to bring the pH up to 9.

[@alifsyafeeq9480]

that means centrifugal pump has many types and circulating pump are included as centrifugal pump category right? And does circulating pump have other design of pump such as vane pump design?

[@DeeP_BosE]

Oh yea exactly what i was searching! can these pump 150-200c fluid? cud u cover high temp fluid pumps in CSP plants ?

[@rjanjasund5998]

This is nice, but I wish there was an explanation for why you might want to use a dry runner or wet runner circulating pumps in a system

[@DethpickleDave]

So, I don't have a hot water loop and have one of those temperature controlled one-way valves at my furthest faucet that dumps the cold "hot" water into the cold line until actual hot water shows up. How much is this type of pump restricting my normal hot water flow when it's NOT running? I only run it on demand or on a schedule. Doesn't seem like it restricts it at all.

[@Dontex_r]

Do a vid on zone valves

[@BFjordsman]

Got to have one between your water heater and the solar panels also

[@EngineeringMindset]

Seen our new video on HOW SOLAR PANELS WORK in detail kzbin.info/www/bejne/j6nXaGWXec95nbs

[@jeanies8495]

I have a recirculation pump on the hot water heater downstairs, the recirculating line like this upstairs under my for the sink. I turned off the recirculating pump, and I unplugged the timer. I am still getting hot water almost on demand upstairs in that bathroom and I don’t want it recirculating because I just found out how bad my copper pipes are. Why is it still coming up there so quickly if the pump is unplugged and what pipe is it recirculating through? The cold pipes? Would it help if I had someone remove the thing under the sink upstairs?

[@Animusapertus]

Are they supposed to run all the time, I noticed ours which is above our boiler for our home forced hot water heating/hot water, basically runs all day long quietly....i never noticed it is basically running all the time, is this normal?

[@ChuckDAquatics]

So I've had a working idea around this type of system before. This looks like the same style circulatory system used to heat floors or driveways during the winter. I have multiple fish aquariums, and I've had an idea of running sealed pex piping, in and out of the tanks, in series with hot water running through a cycle like this, in hopes that the temperature of the pex can maintain a constant temperature to heat the water, and eliminating the need for multiple electric heaters. Does this theoretical system seem like it would be feasible in this scenario?

[@Cjl0189]

Can you show how a degrading unit works like in a pressurisation unit ?

[@86kotek]

Why inlet and outlet diameter is a little bit smaller than nominal size of the pipe?

[@kg-Whatthehelliseventhat]

Would these be used in espresso machines?

[@jesinu]

I've always wanted hot water immediately to the master bath but I've had the nagging feeling that a circulating system would be wasting energy in heat loss when not in use. But I suppose I'm also wasting water while I'm waiting for it to heat up. 🤔 Insulating the heck out of the pipes would make me feel better about it. Thoughts, anyone?

[@nusior]

My pump has been disconnected for years. Idk I kinda don't mind cold water at the beginning, usually hot water is there before I'm done washing my hands 😁 And that's just hands. For bath or shower it's pretty much irrelevant. Or maybe I'm just weird 😆

[@Martinedo_]

I have the same thoughts/questions.. what's more energy efficient -> to use a Circulating pump or not?

[@EngineeringMindset]

It's almost certainly cheaper to waste some water than run a circulating pump 24/7. You could potentially run it on a time schedule so it circulates shortly before you wake up. But commercial buildings usually have regulations that a hit water tap must reach a certain temperature within a certain time to prevent legionnaires' disease

[@jesinu]

@@EngineeringMindset I like the idea of a timer which led me to discover the "on-demand" circulation pump. It looks like you turn the water on briefly, the system detects it, starts sending hot water through the loop, then you turn the hot water on a few seconds later and it's hot. Sounds cool but I'm guessing it's a pricey system. I think I should start with making sure the hot water run to the sink is as short as possible with as small of an inner diameter pipe that I can get away with.

[@yurizhivago4848]

Circulating pumps use electricity and they wear out and then you need to pay a plumber to replace them. Taco pumps are great but I think the electricity cost is going to make you think twice. They use them on some instantaneous water heaters but now we are talking multi thousand $$ water heating systems.

[@h3rozaga]

Please do make one with Fire Pumps! Like this comment if you agree!

[@pritomkalita5299]

Good night

[@emmanuelgutierrez8616]

You missed the fact that you need your pipes to also be able to circulate back to the heater vs most are just long runs one way and stopping by water outlets.

[@aaax9410]

Exactilly the same as a vacumm cleaner air being considered a liquid also

[@moustafaali5961]

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[@tommywatterson5276]

The human heart.

[@shakerileiwat4341]

👍👍👍

[@Ayoub-rc4hh]

👍

[@Biomancer81]

Maybe it is an american thing, but I have never seen one of these anywhere in my hot water system.

[@EngineeringMindset]

Where are you based. I'm in the UK and we have them here. It might even be inside your boiler

[@Biomancer81]

@@EngineeringMindset Seattle, WA. Ive looked up diagrams, and it seems that our water is highly pressurized coming into the system from the water district. Our hot water waste also goes directly to sewer, so it wouldnt flow back into the water heater like in your diagram. Or it is possible I am still missing something.

[@theglizzy12]

@@Biomancer81 I work in the US and in CEA (controlled environment agriculture). These are primarily used in our heating systems for root zone heating or dehumidification. I think they're used mainly in heating as I have one for my heated floors in my house too.

[@Biomancer81]

@@theglizzy12 Right, but not consumer or commercial water heating for use in potable taps.

[@yurizhivago4848]

@@Biomancer81 Lots of houses have hydronic heating with circulating pumps and yours is likely a gravity type with a expansion tank which has air in part of it which is compressed and maintains pressure on your system. It can get airlocked and needs bleeding every few years unless it is a bladder tank. Your pipes are also larger than a hydronic pump based system. Systems with pumps generally have zones and more than one thermostat and shut off valves. I am a HVAC guy in Canada and have seen thousands of these systems. Search hydronic heating for more info.

[@moustafaali5961]

سلام عليكم

[@trxtech3010]

Centri Fugal lololol