Equal friction method of duct sizing | Air handling systems | Air-Conditioning
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- Опубликовано: 6 авг 2024
- Equal Friction Method, also known as ‘Constant Pressure Loss Method’ is one of the most common method of duct sizing of simple duct systems.
The frictional pressure drop per unit length of the duct is maintained constant throughout the system. This method of sizing ducts automatically reduces the velocity in the direction of flow. This method is popular due to its simplicity. In case of symmetrical duct layout having same length in each run, no dampers are required to balance the system. When the runs are different in length, then the shortest run would have the minimum pressure drop and air would come out at higher pressure compared with long runs Also, dampers are required for balancing the pressure drops in various runs.
0:00 Introduction
1:13 Steps in Equal Friction Method
3:00 Equal Friction Method: Numerical example
7:48 Bernoulli's equation in Air-conditioning
10:14 Numerical example: determination of the static pressure at the fan exit
12:13 Determination of dynamics losses
13:49 Determination of Total and Static pressure at the fan exit
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Nice
Thanks!
Sir great information actually I'm looking for this kind of video from long time.
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Excellent source of learning to design the duct and very knowledgeable tutor, a huge appreciation and applauds from my side. All the best for the future videos sir.
Thank you! 🙂
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@@piyushsinghclasses May I get the journal or reference publication where you used theses formulas and all. So that I can use them and show to my managers.
@@saiprathapreddynimmakayala5211 The equation used to calculate the pressure drop per unit length has been derived from Fritzsche equation (an empirical relation for pressure drop in pipes). Other empirical relations may also be used like Darcy-Weisbach equation, Modified Darcy's equation. These can be found in most of the standard textbooks/ reference books on fluid mechanics discussing flow through ducts/ pipes. You may also find these in RAC books by C. P. Arora, R.K. Rajput, Arora & Domkundwar to name a few.
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This is bless from China, thank you 錒叁
兄弟你好眼熟阿
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Hey! Thanks for the video! It was really useful! I would like to know what is the bibliographic source for the equation used to calculate the pressure drop per unit lenght.
Thanks in advance!
Glad to know that you found the video useful. The equation used to calculate the pressure drop per unit length has been derived from Fritzsche equation (an empirical relation for pressure drop in pipes). Other empirical relations may also be used like Darcy-Weisbach equation, Modified Darcy's equation. These can be found in most of the standard textbooks/ reference books on fluid mechanics discussing flow through ducts/ pipes. You may also find these in RAC books by C. P. Arora, R.K. Rajput, Arora & Domkundwar to name a few.
@@piyushsinghclasses Awesome! Thanks again for the information
Please sir I think using the chart will more simplify things
Which chart are you referring to?
Do you have referents for this topic?
The equation used to calculate the pressure drop per unit length has been derived from Fritzsche equation (an empirical relation for pressure drop in pipes). Other empirical relations may also be used like Darcy-Weisbach equation, Modified Darcy's equation. These can be found in most of the standard textbooks/ reference books on fluid mechanics discussing flow through ducts/ pipes. You may also find these in RAC books by C. P. Arora, R.K. Rajput, Arora & Domkundwar to name a few.
What is the name of the reference?
The equation used to calculate the pressure drop per unit length has been derived from Fritzsche equation (an empirical relation for pressure drop in pipes). Other empirical relations may also be used like Darcy-Weisbach equation, Modified Darcy's equation. These can be found in most of the standard textbooks/ reference books on fluid mechanics discussing flow through ducts/ pipes. You may also find these in RAC books by C. P. Arora, R.K. Rajput, Arora & Domkundwar to name a few.
Please provide excel sheet
Which excel sheet do you want me to provide?
Nice
Thanks!