Previous in Forum: Frozen Suction and Compressor   Next in Forum: IKEA Recalls Defective Allen/Hex Keys
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
6 comments
Rating: Comments: Nested
Anonymous Poster #1

Calculation of FAD

04/01/2016 6:07 AM

first you have to find FAD for individual outlets and add all of them together, then you will total capacity of your compressor(FAD)

here,

we have formula,

Q(FAD)=[QN×(Ti+273)×1.013]/(273×Pi), unit L/s

where,

QN=flow of air from respective outlet, unit should be in L/s,

if some time the unite is in Nm3/min,

so u have to convert it,

which is, 16.667NL/s

Pi=pressure at ambient temperature=1 bar

Ti=ambient temperature.
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
JohnDG
Guru
United Kingdom - Member - Not a New Member Hobbies - Musician - New Member Hobbies - Fishing - New Member

Join Date: May 2006
Location: Reading, Berkshire, UK. Going under cover.
Posts: 9684
Good Answers: 468
#1

Re: calculation of FAD

04/01/2016 6:57 AM

And...?

__________________
 "Love justice, you who rule the world" - Dante Alighieri
Reply Score 1 for Good Answer
No more "Almost" Good Answers.
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#2

Re: Calculation of FAD

04/01/2016 11:35 AM

You left a step out:

Q(FAD)=[QN×(Ti+273)×1.013]/[Then a Miracle Happens)(273×Pi), unit L/s
Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#3

Re: Calculation of FAD

04/01/2016 12:08 PM

FAD = frequently added dimensions

__________________
 All living things seek to control their own destiny....this is the purpose of life
Reply
SolarEagle
Guru

Join Date: Mar 2007
Location: by the beach in Florida
Posts: 33392
Good Answers: 1817
#4

Re: Calculation of FAD

04/01/2016 4:01 PM

Cooling BTUs = CFM x ∆h x 4.5

• CFM = The fan CFM plotted on the fan tables, or measured at several points in the system

• ∆h = the enthalpy change through the system (we get this number by converting wet bulb readings.)

• 4.5 = the cooling BTU multiplier at sea level, or .075-lbs. of air per CFM x 60 (minutes in an hour.) This factor will also change at higher altitudes. BTU multipliers will also change due to extreme air temperatures.

http://contractingbusiness.com/archive/system-delivered-btu-calculation-basics

http://www.uigi.com/WebPsycH.html

__________________
 All living things seek to control their own destiny....this is the purpose of life
Reply
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#5

Re: Calculation of FAD

04/02/2016 4:28 AM

The square brackets [] are superfluous

__________________
 Give masochists a fair crack of the whip
Reply
Mr. small
Power-User

Join Date: Nov 2015
Posts: 335
#6

Re: Calculation of FAD

04/03/2016 11:26 AM

AP?

__________________
 "And ye shall seek me, and find me, when ye shall search for me with all your heart."
Reply
Reply to Forum Thread
Have a Different Question?
6 comments

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Codemaster (1); JohnDG (1); lyn (1); Mr. small (1); SolarEagle (2)

Previous in Forum: Frozen Suction and Compressor   Next in Forum: IKEA Recalls Defective Allen/Hex Keys

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (85 right now)
Show Members
Advertisement