Thermal conductivity water

The thermal conductivity of seawater is 0.60 W/(m.K) at 25 °C and a salinity of 35 g/kg. The thermal conductivity decreases with increasing salinity and increases with increasing temperature.

Sources:

Values for fresh water are taken from the engineering toolbox .
Values for seawater are taken from http://twt.mpei.ac.ru which is based on the Heat Exchange Handbook 2002, Bergell Hoyse.

Symbol

$k_w$

Unit

W/(m.K)

Used in

$h_{amb}$

Pseudo film coefficient of ambient fluid at ground level [W/(K.m$^2$)]

$h_{ext}$

Heat transfer coefficient external [W/(K.m$^2$)]

$\mathrm{Pr}_w$

Prandtl number water

Choices

Water	Salinity g/kg	0.01°C	10°C	20°C	30°C	40°C	50°C	60°C
Fresh water	0	0.556	0.579	0.598	0.615	0.629	0.641	0.651
Seawater	0	0.572	0.589	0.604	0.618	0.63
Seawater	10	0.57	0.587	0.603	0.617	0.629
Seawater	20	0.569	0.586	0.602	0.616	0.629
Seawater	30	0.567	0.584	0.6	0.615	0.628
Seawater	40	0.565	0.583	0.599	0.614	0.627
Seawater	50	0.563	0.581	0.598	0.613	0.626
Seawater	60	0.562	0.58	0.597	0.612	0.626
Seawater	70	0.56	0.578	0.595	0.611	0.625
Seawater	80	0.558	0.577	0.594	0.609	0.624
Seawater	90	0.556	0.575	0.592	0.608	0.623
Seawater	100	0.554	0.573	0.591	0.607	0.622
Seawater	110	0.552	0.571	0.589	0.606	0.621
Seawater	120	0.55	0.57	0.588	0.604	0.62
Seawater	130	0.548	0.568	0.556	0.603	0.618
Seawater	140	0.546	0.566	0.585	0.602	0.617
Seawater	150	0.544	0.564	0.583	0.6	0.616