Pump Head Calculation of HVAC Chilled Water System with Option 1 and Option 2 in Urdu

[@TanweerAhmed]

HVAC Condenser water pump head calculation: kzbin.info/www/bejne/hnOldoatZ7eMfK8

[@AmitSingh-he9rg]

You're just amazing.. no one can match your teaching skills .. always a fan of your videos, helps us most when we are stucked in our real time projects.🙏 Kindly make topic wise videos on how to pass ASHRAE CHD Exam and NFPA Certification exams .

[@TanweerAhmed]

Thank you and noted

[@MOHDMOHSIN-ic8id]

Behtreen video Sir,

[@TanweerAhmed]

Alhamdullah and thanks

[@MEP.ENGINEERING.WORKS92]

Boht achi explanation bhi

[@TanweerAhmed]

I really appreciate your feedback. Thank you for taking the time to watch and comment

[@mirzaateeqbaig9844]

Jazak Allah ... Very nice

[@TanweerAhmed]

Alhamdullah

[@smartsayed143]

Jazakallah Sir. ALLAH apko khosh rakain.❤❤❤

[@TanweerAhmed]

May Allah bless you and Thanks

[@aejazaslam3021]

mashallah sir , great effort and work

[@TanweerAhmed]

Alhamdullah and thanks

[@stanstrader7910]

Assalamaleykum sir, another helpful video from Tanweer sir, I always watch your videos in my free time and listen to your interview series video on repeat mode. You provide the relevant information. Jazak Allah Khair,

[@TanweerAhmed]

W.Salam, Alhamdullah

[@stanstrader7910]

Sir can you please guide me , I want to get a job in the field of MEP design at any gulf countries. Should i learn BIM ? Will it help me. I have already 7 years of experience in HVAC design, projects and sales.

[@TanweerAhmed]

@@stanstrader7910 MashaAllah your experience is good. I have no abroad experience but my suggestion is to do any course according to your present job because without practicing any course will be useless.

[@stanstrader7910]

Thanks for your suggestion 🙏

[@TanweerAhmed]

@@stanstrader7910 JazakaAllah

[@asifhussain6320]

good informative video's bro 😊

[@TanweerAhmed]

Thank you and Alhamdullah

[@thepurposeofmyexistence2511]

Nice video sir , But why in closed loop we dont add the height of the building as static head as , the chilled water has to travel at top of the building and serve most remote ahu , Yes we are considering lossed due to internal dia of pipe and fitting due to friction with addition equipment lossed internally such as air cooled chiller and ahu . And other question sir , at time of start up of chilled water system from where do we fill all pipes with chilled water as we know at time of start up all pipes and pump are filled with air , so from where we connect the water line to primary pump at time of start up .. Thank y sir for sharing your knowledge

[@TanweerAhmed]

In a closed-loop chilled water system, the height of the building is typically not considered as static head for several reasons: Closed-Loop System: Chilled water systems are designed to be closed-loop systems, meaning that the water is recirculated continuously through a network of pipes, chillers, and air handling units (AHUs). Unlike open-loop systems, such as cooling towers, where water is discharged after use, closed-loop systems aim to maintain a consistent volume of water within the system. Hydraulic Equilibrium: In a closed-loop system, the water level remains relatively constant because it is continuously circulated and returned to the chiller for cooling. The pump's main role is to overcome friction losses and maintain the flow rate required for cooling, rather than lifting water to a great height. Localized Losses Considered: As you mentioned, the design of the closed-loop system takes into account losses due to pipe diameter, fittings, friction, and equipment losses, such as those from air-cooled chillers and AHUs. These losses are specific to the internal components of the system and are calculated separately. Return Line Placement: In a closed-loop system, the return line is typically located at a lower elevation within the building, often in the basement or at a level where it can easily connect to the chiller. This return line allows for the efficient recirculation of chilled water without the need to lift it to the top of the building.

[@TanweerAhmed]

2nd question answer: During the startup of a chilled water system, it's essential to ensure that all pipes and the pump are properly filled with chilled water to eliminate air pockets and ensure the system operates efficiently. Here's the typical procedure for filling the pipes with chilled water during startup: Makeup Water Connection: To initiate the filling process, a temporary makeup water connection is usually established. This connection is made at a point where the system can be easily filled, often near the chiller or a designated makeup water inlet. Valve Configuration: Ensure that all necessary valves in the system are in the correct positions for filling. This may involve closing isolation valves that would prevent water from flowing into the system and opening appropriate valves to allow water to pass through. Priming the Pump: The primary pump(s) in the chilled water system should be primed to remove any air that may be present in the pump casing and suction line. Priming typically involves opening a priming valve or connection and allowing the pump to draw in water until it is fully primed. Slow Fill: Gradually start the primary pump(s) at a low flow rate. This gradual filling allows chilled water to enter the system while displacing any air that may be present. The slow fill rate minimizes the risk of entrapping air within the system. Air Venting: Air vents or bleed valves should be installed at high points in the system, such as the top of risers and air-handling units. These vents automatically release trapped air as the system is filled with water. Monitoring and Adjusting: Continuously monitor the system pressure and temperature as the water is circulated. Adjust the flow rate as needed to maintain the proper system pressure and prevent excessive air entrapment. Expansion Tanks: If your system includes expansion tanks, ensure they are filled to the appropriate level to accommodate any thermal expansion of the chilled water. By following these steps, the entire chilled water system is gradually filled with water while purging any trapped air. This process ensures that the system is free from air pockets and ready for efficient and reliable operation. Proper filling and venting are critical to maintaining system performance and preventing potential issues.

[@ManishKumar-jj5qg]

Excellent sir 👍

[@TanweerAhmed]

Thank you for your feedback!

[@shahbaz__]

Assalam Alaikum Sir Thanks a lot for your efforts. Your videos are very informative and well designed, concise and accurate. However, I have one humble request for you. Please arrange the videos in a sequential order topic wise in the respective playlists, it will help us beginners to benefit from your enormous knowledge in a more efficient way.

[@TanweerAhmed]

وعلیکم سلام، الحمداللہ

[@Kids_vlog786]

bro appreciated , i have one RFI do we need to consider supply pipe only in straight pipe length or both ?

[@TanweerAhmed]

What do you mean by both?

[@Kids_vlog786]

@@TanweerAhmed I'm talking about supply pipe line and return to pump from last one equipment

[@TanweerAhmed]

@@Kids_vlog786 yes complete close loop have to calculate

[@Kids_vlog786]

@@TanweerAhmed , noted. What about open loop system?

[@TanweerAhmed]

@@Kids_vlog786 Watch my condenser water pump head calculation video. This complete complete loop will be calculate but here static head will be added while in chilled water, no static head to be added.

[@SirajudeenJahabarAli-tr9sy]

Salaam. Hi Engineer. Did Return pipe lengths should be considered in pump head calculation or not?

[@TanweerAhmed]

Yes consider

[@faridkhan-mf5xg]

Sir ye head primary pupm k lye Hai ya secondary pump k lye hai

[@TanweerAhmed]

In drawing only primary pumps

[@IamFaizalmech]

Sir apki vdo haqeeqat me bhot teach krti h me bhot kuch learn kr rha hy lwkin abhi jo iske 11:55 vdo time h waha pr jo gate valve ki equivalent length h wo jo aa rhi h 6.68 but jo apne piping ki pdf provide krayi h uske according 10in dia k liy 12 aa rhi h equivalent length. Please clear my confusion. Jazak allah

[@TanweerAhmed]

I have provide same table, if I have done any mistake then rectify at your end in your working. This video is just understanding the concept and procedure.

[@IamFaizalmech]

@@TanweerAhmed Ohk sir got it and love from india ( new delhi) 🫡

[@TanweerAhmed]

Thanks a lot

[@tilawatkhan2015]

Asssalam u Alikum Sir! The excel sheet link (For downloading), you shared for pump head calculation of chilled water pump, excel sheet is not available in that, please kindly check.

[@TanweerAhmed]

W.Salam, I have re-attached the link. Check again and download from this video's description

[@shwetangshrotriya3668]

Sir, I am confused in that I have to calculate all pipes and fitting sizes of each floor or the longest one only. Can you please confirm that?

[@TanweerAhmed]

Only longest pipeline

[@TanweerAhmed]

Only longest Pipes, fittings, valves and equipment

[@akhtaransari2269]

Sir ek chiz me mai confused se Hvac and MEP me mujhhe aage kam krna hai inshaAllah. To mai design se job kru ya site pe.

[@TanweerAhmed]

Site work to design because first understand practical work

[@imfahad21]

That's really very nice video... But In Option 1, after calculating the friction loss of the 90-degree elbow, you haven't multiplied it by the total quantity like the way you did it in Option 2.... So, was this done intentionally or is it a mistake? Kindly clarify

[@TanweerAhmed]

Can the mention timestamp of the video in comments box where this problem is facing, as I review and update accordingly

[@imfahad21]

​​@@TanweerAhmed time stamp 11.02... But since while calculating friction loss of valves and fittings, you are already putting the value of Total length on Darcy Weisbach Equation after multiplying equivalent length with Quantity... I guess that's the reason, no need to multiply the quantity on Friction loss Column again...

[@MuhammadKashif-be5tl]

Good evening sir, I have one question, How much minimum and maximum chilled water pressure for AHU,FAHU and FCU?

[@TanweerAhmed]

You can know through this calculation

[@MuhammadKashif-be5tl]

@@TanweerAhmed Sir if we know the pump head value. So by using this formula we can calculate p= 0.434*H*SG

[@kforkids768]

Sir please can you make a video on Heat load calculation using Excel sheet

[@TanweerAhmed]

Insha'Allah, in future

[@jimmyjohn4070]

👍

[@TanweerAhmed]

👌

[@TauseefAhmad-tq7ck]

Sir I am working on High rise building project for 2 months can you please make a video on how to execute the project different installations sequences, Material Request, submittal etc

[@TanweerAhmed]

Insha'Allah I will prepare more videos but some my videos are already uploaded and available on my channel

[@TauseefAhmad-tq7ck]

@@TanweerAhmed Thank you Sir I am always watching your videos, these are really helpful but what we need is comprehensive video for what I mentioned above because are a lot of students and engineers needs it

[@TanweerAhmed]

@@TauseefAhmad-tq7ck Kindly time by time remind me your requirements. I will Insha'Allah try my best to provide tutorial videos accordingly.

[@TauseefAhmad-tq7ck]

@@TanweerAhmed Thank you so much Sir InshaAllah I will remind you

[@TanweerAhmed]

@@TauseefAhmad-tq7ck JazakaAllah

[@tahanasir8973]

lets suppose there is height difference ... chiller is at roof top & remote AHU is at ground level ..... then in this case..... do we consider static head ???

[@TanweerAhmed]

I have explained already that static head will not be added in calculation of chilled water closed loop, either chiller at lower lever or top level.

[@tahanasir8973]

Ok Sir .. thank you for your support & help … one more thing i wanna ask is that … for secondary pump head calculations… we will follow the same procedures & steps & formula etc … & for secondary pumps do we consider static head ? Or only consider dynamic head … Best Regard’s

[@TanweerAhmed]

@@tahanasir8973 This video's calculation is for primary pumps. If you want to head calculate for primary and secondary then procedure will be used same. But this closed loop will be divided in two parts. This is closed loop therefore no static head will add.

[@mohamedashiq4425]

Assalam alaikum sir. can you share the excell sheet it will be very helpful

[@TanweerAhmed]

Excel sheet link is attached in this video's description for your download

[@MuhammadAhmad-sc4zk]

Sir may I have that calculation sheet

[@TanweerAhmed]

The link is attached to this video description. you can download

[@MuhammadAhmad-sc4zk]

Thanks sir will you please provide me the ashare fundamental book of this year

[@TanweerAhmed]

This is copyright book. Latest version can be purchased from ashrae website

[@syedmursalin6591]

Sir ,I need excel sheet link

[@TanweerAhmed]

Attached link in this video's description for free download

[@vijaybajaj401]

Bhai videos kyo nahi aa rahe aajkal busy ho kya?

[@TanweerAhmed]

You are right. I am posted at new construction project for HVAC/M&P works, therefore, unable to prepare new videos. But I will continue this work soon