Previous in Forum: flow transmitter   Next in Forum: ''repair of abb plc''
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
Rate Comments: Nested
josej
Power-User

Join Date: Mar 2008
Location: Mumbai
Posts: 250
Good Answers: 2

Orfice Equation

05/11/2008 2:33 PM

Dear Frnds

As per API 14.3, Equation for Bore dia/Flow in SI units at mass flow is

Qm=3.5E-05*Cd*EV*Y.(d)2*sqrt (denisty*pressure diff )

Now , velocity of approch factor (EV) is 1/root of (1-BETA RACE TO 4)

Since velocity of approch factor is related to d, (Beta=d/D), We have two unknowns on the right hand side ( EV and d),

How can we find the bore diameter , with other parametrs known,

Regards

Jose
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
srini
Power-User

Join Date: Mar 2008
Location: Houston, Texas
Posts: 101
Good Answers: 6
#1

Re: Orfice Equation

05/12/2008 9:43 AM

That is why we use computer programs .

The computer does the iteration to come to a solution.

If you want to do it manually you have to assume some value and change it till the equation is satisfied.

__________________
 If you don't know where you are going,you are bound to get there
Register to Reply
Register to Reply
Have a Different Question?

Previous in Forum: flow transmitter   Next in Forum: ''repair of abb plc''

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Instrumentation:
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 (65 right now)
Show Members
Advertisement