Bulk Mod / Compressibility of Water at Different Pressure, Temperature

[auzie5]

Does anyone have a reference for tables or formulas that detail the relationship between compressibility of water (or bulk modulus) vs. Pressure and Temperature?

i.e. at T = 0 deg C, P = 20,000 kPag is the bulk modulus of water significantly different than at T = 20 deg C, P = 0 kPag (bulk mod = ~ 2.2 x 10^9 Pa)? And I should qualify "significant" to mean does it change the predicted amount of hydro test fluids required to bring a test section up to pressure.

Thanks in advance for any insight.

 

[auzie5]

Sorry, let me clarify:

Can the same bulk mod be used to estimate cube's required to bring a (~) fully packed test section up to pressure (0 kPag to 20,000 kPag)if the test occurs at 2 deg C or if the the test occurs at 30 deg C? Somewhere's in the bulk mod = 2.2 x 10^9 Pa range?

Thanks.

 

[hacksaw]

any differences are factored into the pressure test proceedure and duration.

the usual elasticity issues are associated with trapped air in the vessel being tested not the modulus of water.

 

[BigInch]

If you type on GOOGLE's page, "compressibility of water", what do you think will come up...

after that try "volumetric expansion of water with temperature"

I hate Windowz 8!!!!

 

[racookpe1978]

What are the temperature ranges you need the equation to accurate between?
What pressure ranges?

WARNING! If you receive an equation valid between "a" degrees and "b" degrees, the driver of that equation (probably an polynomial of 4, 5, 7, 8, or whatever level, do not EVER use it past the limits that it was written into.

Often, a table blows up outside the specified limits very, very quickly!

 

[ione]

As BigInch noticed above there's a wealth of information on the web.
Just to give you some hints:

ftp://ruska.otago.ac.nz/OCEM/Staff%20documents/Staff%20folders/Richard%27s/Mendeley%20RE%20bu%207.2.13/Mendeley%20Desktop/Otero%20et%20al.pdf

http://documents.htracyhall.org/pdf...ked)/(Kell, G.S.) (Kelley, C. Stuart)-396.pdf

http://www.nature.com/srep/2012/121218/srep00993/full/srep00993.html#ref26

http://www1.lsbu.ac.uk/water/data1.html

 

[zdas04]

Also, be more concerned with pipe stretch than with water compressibility.

If your concern is ordering water for the test, quit fooling yourself, water trucks never arrive full and an 80 bbl truck will often have less than 70 bbl on it. Just one underfull truck (and they will all be somewhat underfull) will be a bigger error than compressibility of water, plus elasticity of the pipe, plus compressibility of dissolved gases. I always just order 5-10% more water than I expect to need.

David Simpson, PE
MuleShoe Engineering

Law is the common force organized to act as an obstacle of injustice Frédéric Bastiat

 

[racookpe1978]

Or, once you do get the pipes and tanks full .... the sun comes out, the pipes heat up, and the pressure goes up.
Then after sunset, the pipes cool and the pressure drops.
Or it rains and the pipes and tanks cool and the pressure drops.