⚠️ *This video took 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
@qpSubZeroqp2 жыл бұрын
It's amazing how little people think about the future use compared to ”It's cheaper? Perfect! Just install that one!” or ”Yeah, we can just fix it later.”
@rundown3984Ай бұрын
It depends on the financial standpoint of a business owner or investor. They may not have enough money right off the bat to pay for the extra ductwork and equipment in more advanced systems. They just want to get the business up and rolling
@ironmatic1Ай бұрын
Dual duct systems were extremely common in the 60s through the 80s in the US. At my university here in Texas, all the original dual duct systems from the 70s are still going, complete with all the ancient mixing boxes, tiny high static hot/cold deck ductwork, pneumatic thermostats, and the enormous custom AHUs literally built into the buildings. Interestingly enough, one of our buildings completed as late as 2008 has a dual duct system. Dave McFarlane has an interesting writeup on old systems called "Retrocommissioning older buildings."
@STEINYY3 жыл бұрын
I liked the CAV HVAC System video you did a couple of years ago but this one was, well better explained I must say.
@avejst3 жыл бұрын
Interesting as always 👍 Thanks for sharing 👍😀
@raheemkhan40833 жыл бұрын
Very nice sir. time is no issue understanding is important 😊
@wolverineadamantium70153 жыл бұрын
Thanks for the PDF file I hope HVAC pdf file is also available. this channel is awesome
@ashleygilliam62053 жыл бұрын
As always videos are great. Have you thought about adding a multizone CAV system to your examples? I've been looking for more info about them, but there's not a lot out there. Seems similar to the dual duct system but the individual zone dampers/actuators are at the AHU with multiple ducts feeding the different zones. Thanks!
@sharath15my3 жыл бұрын
Very informative
@lupoa3 жыл бұрын
Waw ! Amazing 🤩
@TargetTutorialWithDawit3 жыл бұрын
Thank you Sir
@JK-dx6zb3 жыл бұрын
Could you pls make a video to talk about duct sizing using static regain method with some examples? Thank you.
@syedfaiyaz37623 жыл бұрын
Unbelievable brooo
@2023noone3 жыл бұрын
easily explained video, as always. @4:33 the total flow rate is fixed, but to the individual diffuser, with the help of damper, we can decrease the individual flow rate (e.g. to 3 cubic m/s) although the total flow rate (e.g. 20 cubic m/s) will remain constant, right?
@johndecarlo45293 жыл бұрын
Paul can you please make a load calculation video?
@rayzard36873 жыл бұрын
Please make a detailed video about transistors and their uses,types,working and why they are revolutionary invention I know that there are many videos about transistors but your animation and explanation is best 😁
@EngineeringMindset3 жыл бұрын
Transistor video now live: kzbin.info/www/bejne/gGXSgGqGicShsLM
@fahadraja2183 жыл бұрын
Good job
@raffycapati Жыл бұрын
thanks a lot for these learning materials. Maybe just put radius also on the duct work illustrations since these 90 degree designs creates air losses on the system.
@markoler67123 жыл бұрын
Would a VAV control system also require cooling at the AHU as well as reheating for the VAV box terminals? Is there a substantial difference in this way between CAV and VAV? Or is it solely due to the modulation of air volume (and furthermore, heating) for the individual rooms in a VAV system that saves energy?
@drsovanghosh70093 жыл бұрын
Sir please make a video on motor driver..
@marshallnmoonshine2 жыл бұрын
Just a mention that CAV’s are still used in places where the air exchange per hour (ACPH) is required. I work in a decent-size modern hospital and air-turnover is critical to pass inspections.
@sullysullivan1282 Жыл бұрын
It seems so obvious, but I had never even considered air turnover - let alone a hospital. Glad to hear it's a thing, though.
@markalsendi28893 жыл бұрын
Big brain
@raghavar24323 жыл бұрын
Please do videos on generator working please.... TQ
@wyndhamcoffman89613 жыл бұрын
So I'm curious; if they have to chill the incoming air to a set temperature anyways, then reheat the air at the point of use; why not use a heat pump to simultaneously chill the air coming into the building, and heat air at the point of use?
@Tiktokgirls99993 жыл бұрын
Hi, would you mind if you make some more videos about water system in hotel or in the house ?
@JjMn10003 жыл бұрын
cool
@AneesIsmaeel3 жыл бұрын
Do you have video or book about HVAC design in Pharma industry .where some room must be positve pressuer and other is negative ...etc
@elena65163 жыл бұрын
I am back to bother you :) Can you do more motor control? i.e. soft starters? Perhaps some steam plant stuff (high pressure steam), hydraulics, and pneumatics? Diesel generators? New processes vs old processes? Things found in institutions like universities and hospitals, and whether or not they differ from commercial and industrial? Have you considered including a bit more calculation in your videos? Or another channel to connect the visuals with the calculations for the math nerds? MORE MORE GIVE ME MOAAAAAAAR
@vigneshp27373 жыл бұрын
Crt me if I'm wrong...in this there no separate CAV box like VAV box only the thing is to add on heater or similar to heating unit. So CAV is one type of system which we used early. There is no use of it ..and one more question instead of VAV can we use motorized VFD for the same it can also be control the flow as well by using the thermostat. And why do we need air flow sensor on VAV we were already controlled by thermostat... please clear my doubts ????????
@Alaakso3 жыл бұрын
30 m3/s is a lot of air. Not by any means small ahu can provide that kind of air volume flow. Also, rotating or crossflow heat energy recovery is now day pretty much standard in AHU units. At least here in Finland.
@EngineeringMindset3 жыл бұрын
Cross flow covered here in detail: kzbin.info/www/bejne/gXTMp2t_drqenpo
@scoobyedoo77633 жыл бұрын
Bro cold storage wiring diagram pls explain
@mAnonim-Us4 ай бұрын
Рақмет 2024 🇰🇿
@jyotigahoi77923 жыл бұрын
Please make a video on work of rechargeable battery..
@EngineeringMindset3 жыл бұрын
Have you watched our car battery video? That's rechargeable
@jyotigahoi77923 жыл бұрын
No I am talking about the AA battery
@jyotigahoi77923 жыл бұрын
It's like alkaline battery but rechargeable
@turquthuseynov93233 жыл бұрын
But I think in CAV system we can regulate the flow rate of air to the room if we will put VCD in room branch. Suppose, you are telling for one room 30m3/min in 13degree is very high, so we can adjust damper and get 20m3/min in 13 degree, and that will be sufficient for room. Where I am wrong, please, explain me
@suncrafterspielt94793 жыл бұрын
4:32 That poor guy got his office right next to the server :c
@relevantinformation66553 жыл бұрын
That’s me, I sit in our server room :) it’s like Antarctica in there to keep the servers cold 🥶
@EngineeringMindset3 жыл бұрын
Sounds like you need this video kzbin.info/www/bejne/rnPbqpuuos2cncU
@suncrafterspielt94793 жыл бұрын
@@EngineeringMindset haha :D But I was referring to the noise. Now lets see what video you will recommend :D
@gg-gn3re3 жыл бұрын
@@relevantinformation6655 yep, best place in the building. IDK why he thinks that guy is a poor guy.
@mahzeastern12653 жыл бұрын
hi can you share me z guide book(hvac design) pls.
@pthindrzzz4603 жыл бұрын
CAN U PUT ONE VIDEO OF RESISTOR PLSS
@EngineeringMindset Жыл бұрын
Check out NEW resistor video, everything covered! ➡️ kzbin.info/www/bejne/eorGfXl-nLt2pJI
@2023noone3 жыл бұрын
@3:53 you are saying that temperature changes in different rooms, but @5:51 you are saying all the rooms receive the same temperature. I don't get it. Is it that normally in CAV, you get same temperature in all rooms but by using inefficient terminal heater/cooler you can get varied temperature?
@EngineeringMindset3 жыл бұрын
You've misunderstood. 3:53 every room receives the same temperature air, we can change the air temperature but every room will get this.
@samarsaeed14183 жыл бұрын
Bro can you please tell me how to convert 12v dc to 12v ac current?
@EngineeringMindset3 жыл бұрын
kzbin.info/www/bejne/n3rUmXSOZa5qoqs
@justins14842 жыл бұрын
No mention of TAB? Testing, Adjusting, and Balancing that makes the system actually do what its supposed to and where problems might be discovered. Also, You don't adjust the Volume dampers during commissioning. You do that's during TAB by a certified technician that sets total fan speed as well as each diffuser output. Arguably one of the most important parts of commercial HVAC, by making sure that expensive system is doing what it was designed to due.
@dwayne73563 жыл бұрын
Are VAV systems still preferred over CAV during covid-19 because of the lack of air volume exchanges instead of constant air exchanges?
@chrisdavis4693 жыл бұрын
Old buildings+a not for profit company= steam reheat. Good times
@joelpereira113 жыл бұрын
Can u do a Hybrid Variable Refrigerant Flow
@EngineeringMindset3 жыл бұрын
See this video kzbin.info/www/bejne/rqjZnKKggM5_gK8
@samuelolteanu3 жыл бұрын
Can you do a video about solar hibrid air conditioners? How do they work? Or is it a scam?
@EngineeringMindset9 ай бұрын
Seen our new video on HOW SOLAR PANELS WORK in detail kzbin.info/www/bejne/j6nXaGWXec95nbs
@frankjames195511 ай бұрын
ya a damper will solve your problem, no need for re heaters and all that
@Tarex_3 жыл бұрын
Just saw this and i puked a bit in my mouth.. we have a CAV system with two machines built in our newly built hotel.. one zone for the guest rooms, one zone for the tiny bar, two guest kitchens, a green room, the only meeting room and the lobby.. so a silent meeting room has the same Volume (sound not air) is present in the meeting room as in the lobby.. then in the summer in the lobby doors are open, upper floors without windows that can be opened and the whole thing can't go below 18°c degrees which are realistically 21°c and then the chiller dies...
@hooman35763 жыл бұрын
*When u r not first and have nothing to say now* 😂😂😂😂😂
@ankitjha62293 жыл бұрын
Not First😒
@EngineeringMindset3 жыл бұрын
You are first
@ankitjha62293 жыл бұрын
@@EngineeringMindset 😁😁
@ve4mm3 жыл бұрын
This type of system is normally done with a Rootop unit or a furnace. I have designed over 5000 Electrical & Mechanical projects. I am an electrical & mechanical engineer. If they want temperature control I just install a zone damper system. An HRV is usually installed as well. I have never seen this system in a large building. Normally VAV with mixing box at the air handler. Mostly pneumatic controls and hot water rads. I also built myself 100 apartments as of recent. I was the engineer and contractor and I own the buildings. All 100% Electric. No gas. In Canada. I hate gas. It is dangerous and in Manitoba, our power is all Hydro which is a renewal resource. USA loves coal. It is dirty and high pollution. I was involved in 1991 in converting a coal-fired Power Plant in Selkirk, MB to natural gas. It is now closed.
@mikeeeeez19602 жыл бұрын
Good day sir! I am interested in working as an HVAC engineer in Canada. May I ask for your email sir?