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vapor

PURPOSE ^

VAPOR calculates heat of evaporation for pure water

SYNOPSIS ^

function L=vapor(t)

DESCRIPTION ^

 VAPOR calculates heat of evaporation for pure water 
 L=VAPOR(t)computes the heat of evaporation for pure water. This can
 be used to compute the fresh water flux from latent heat flux.

 INPUT:   t - water temperature  [C]

 OUTPUT:  L - heat of evaporation  [J/kg]

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function L=vapor(t)
0002 % VAPOR calculates heat of evaporation for pure water
0003 % L=VAPOR(t)computes the heat of evaporation for pure water. This can
0004 % be used to compute the fresh water flux from latent heat flux.
0005 %
0006 % INPUT:   t - water temperature  [C]
0007 %
0008 % OUTPUT:  L - heat of evaporation  [J/kg]
0009 
0010 % Range of validity: 0 <= t <= 100 deg C.  Check value: at t=100 deg C,
0011 % L = 2.2566 x 10^6 J/kg.  Reference: Landolt-Bornstein, Numerical Data
0012 % and Functional Relationships in Science and Technology. New Series,
0013 % Sundermann, J. (editor), vol. 3, subvol. a, Springer-Verlag, p. 256.
0014 % No formulas are known to be available for the change of the heat of
0015 % evaporation as function of salinity.
0016 
0017 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0018 % 1/22/99: version 1.0 (contributed by RO)
0019 % 8/5/99: version 2.0
0020 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
0021 
0022 a0=2.50039e6;
0023 a1=-2.3683e3;
0024 a2=4.31e-1;
0025 a3=-1.131e-2;
0026 L=a0+a1*t+a2*t.*t+a3*t.*t.*t;
0027

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