Abstract
Measurements on the speed of sound (U) in seawater as a function of salinity at 1atm (P=0bar applied pressure) have been measured from 25 to 95°C. The new measurements have been combined with the earlier studies to determine the adiabatic compressibility (βS=-(1/ρ)(∂ρ/∂P)S) of seawater from 0 to 95°CβS=1/ρU2where ρ is the density and S is the entropy of seawater. The isothermal compressibility of seawater were determined fromβT=βSα2T/ρCpwhere the thermal expansively, α=-(1/ρ)(∂ρ/∂T)P and heat capacity (Cp) were determine from earlier measurements. The values of the isothermal compressibility at 1atm (βT0) have been used to estimate the effect of pressure on the secant bulk modulus of seawater (KP at applied pressure P)KP=v0P/v0-vP=K0+A P+B P2where the specific volume v=1/ρ and K0=1/(βT0). The values of A and B at high pressures have been determined from literature high pressure measurements. This allows one to make reasonable estimates of the density of seawater as a function of pressure to 100°C when seawater is used as a cooling agent and for desalination (Feistel, 2010).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 149-154 |
| Number of pages | 6 |
| Journal | Marine Chemistry |
| Volume | 126 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - Sep 20 2011 |
Fingerprint
Keywords
- Compressibility of seawater
- Effect of pressure on density of seawater
- Equation of state of seawater
- Secant bulk modulus
- Speed of sound
- Temperature
ASJC Scopus subject areas
- Chemistry(all)
- Oceanography
- Environmental Chemistry
- Water Science and Technology
Cite this
The compressibility of seawater from 0 to 95°C at 1atm. / Millero, Frank J; Huang, Fen.
In: Marine Chemistry, Vol. 126, No. 1-4, 20.09.2011, p. 149-154.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The compressibility of seawater from 0 to 95°C at 1atm
AU - Millero, Frank J
AU - Huang, Fen
PY - 2011/9/20
Y1 - 2011/9/20
N2 - Measurements on the speed of sound (U) in seawater as a function of salinity at 1atm (P=0bar applied pressure) have been measured from 25 to 95°C. The new measurements have been combined with the earlier studies to determine the adiabatic compressibility (βS=-(1/ρ)(∂ρ/∂P)S) of seawater from 0 to 95°CβS=1/ρU2where ρ is the density and S is the entropy of seawater. The isothermal compressibility of seawater were determined fromβT=βSα2T/ρCpwhere the thermal expansively, α=-(1/ρ)(∂ρ/∂T)P and heat capacity (Cp) were determine from earlier measurements. The values of the isothermal compressibility at 1atm (βT0) have been used to estimate the effect of pressure on the secant bulk modulus of seawater (KP at applied pressure P)KP=v0P/v0-vP=K0+A P+B P2where the specific volume v=1/ρ and K0=1/(βT0). The values of A and B at high pressures have been determined from literature high pressure measurements. This allows one to make reasonable estimates of the density of seawater as a function of pressure to 100°C when seawater is used as a cooling agent and for desalination (Feistel, 2010).
AB - Measurements on the speed of sound (U) in seawater as a function of salinity at 1atm (P=0bar applied pressure) have been measured from 25 to 95°C. The new measurements have been combined with the earlier studies to determine the adiabatic compressibility (βS=-(1/ρ)(∂ρ/∂P)S) of seawater from 0 to 95°CβS=1/ρU2where ρ is the density and S is the entropy of seawater. The isothermal compressibility of seawater were determined fromβT=βSα2T/ρCpwhere the thermal expansively, α=-(1/ρ)(∂ρ/∂T)P and heat capacity (Cp) were determine from earlier measurements. The values of the isothermal compressibility at 1atm (βT0) have been used to estimate the effect of pressure on the secant bulk modulus of seawater (KP at applied pressure P)KP=v0P/v0-vP=K0+A P+B P2where the specific volume v=1/ρ and K0=1/(βT0). The values of A and B at high pressures have been determined from literature high pressure measurements. This allows one to make reasonable estimates of the density of seawater as a function of pressure to 100°C when seawater is used as a cooling agent and for desalination (Feistel, 2010).
KW - Compressibility of seawater
KW - Effect of pressure on density of seawater
KW - Equation of state of seawater
KW - Secant bulk modulus
KW - Speed of sound
KW - Temperature
UR - http://www.scopus.com/inward/record.url?scp=80051937619&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051937619&partnerID=8YFLogxK
U2 - 10.1016/j.marchem.2011.05.003
DO - 10.1016/j.marchem.2011.05.003
M3 - Article
VL - 126
SP - 149
EP - 154
JO - Marine Chemistry
JF - Marine Chemistry
SN - 0304-4203
IS - 1-4
ER -