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Sea Water Thermodynamic Properties?

by tanky322
Tags: properties, thermodynamic, water
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tanky322
#1
Feb12-10, 08:04 AM
P: 43
Im looking for thermodynamic properties of seawater, especially specific heat and enthalpy. Im designing a solar desalinator, and im trying to determine the required amounts of energy to evaporate the water.

Is there a way in which I can determine the enthalpy of seawater by knowing the enthalpy of both salt and water?


Thank you
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Astronuc
#2
Feb12-10, 08:39 AM
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The density of seawater is about 1025 kg/m^3 and the specific heat is about 3850 J/(kg C).
http://sam.ucsd.edu/sio210/lect_2/lecture_2.html

http://www.tpub.com/weather3/1-17.htm

See last page -
http://www.whoi.edu/science/PO/peopl...e_notes_1b.pdf

http://www.math.nyu.edu/caos_teachin...sea_water.html

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tanky322
#3
Feb13-10, 10:57 AM
P: 43
Thank you!

tanky322
#4
Feb14-10, 08:38 AM
P: 43
Sea Water Thermodynamic Properties?

Quote Quote by Astronuc View Post
The density of seawater is about 1025 kg/m^3 and the specific heat is about 3850 J/(kg C).
I think there is a unit issue with the specific heat of 3850 J/(Kg K), given that the specific heat of water is around 2200 KJ/(Kg K).

I just wanted to see if what im saying here is making sense.


Thanks
wehoosier
#5
Apr1-11, 02:04 PM
P: 1
Kaiser Engineering did an extensive research study for the government on the thermodynamic properties of seawater about 40 years ago. The properties vary with the salinity, which also varies in different parts of the seas. It is available from the Library of Congress
AlephZero
#6
Apr1-11, 04:45 PM
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Quote Quote by tanky322 View Post
I think there is a unit issue with the specific heat of 3850 J/(Kg K), given that the specific heat of water is around 2200 KJ/(Kg K).
3850 is the right order of magnitude, depending on the salinity.

See here - no disclaimers required for this source:
http://www.kayelaby.npl.co.uk/genera...2_7/2_7_9.html


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