en verdad...no es tan asi... es un potencial pero lejos de la factibilidad... los sensores termicos, como bien decis detectan el agua caliente que sale a la superficie... el tema pasa que la recirculacion de agua se hace debajo del nivel de navegacion en superficie...osea...sumergido, y masa de agua que desprende el submarino es infinitamente inferior con la que se mezcla... la difusion de temperatura es casi instantanea y no llega nunca a la superficie.
con respecto al agua caliente de los submarinos, resumen poara los que no leen ingles: tanoarg aparentmente tiene razon.
abajo la justificacion tecnica:
submarine's propulsion system operates at very high temperatures of several
thousand degrees C and all three methods of heat transfer must be taken into
account. However, convection and conduction of the waste heat to seawater is
the primary way of cooling a submarine. However, remote sensing usually relies
on monitoring the heat radiation from an object including it's heating of the
surrounding environment, which in this case is the seawater around the submarine.
Let us assume that the submarine is expelling boiling water at 100 degrees
C (Celsius).
The wavelength for the peak of the thermal radiation spectrum (Black body
radiation) for a material at a temperature of 100 degrees C is determined by:
Max Wavelength (in micrometers) = 2897 divided by the temperature in degrees K
0 degrees C = 273.16 degrees K, thus boiling water is
at 273.16 + 100 = 373 degrees K.
Max Wavelength = 2897 / 373 = 7.8 micrometers in the infrared.
From References 1 and 2 we find that at 7.8 micrometer wavelength the attenuation
of water is greater than -30 dB per meter. This means that for a given amount of energy
entering a meter of length of water only 0.1% passes through the meter and the
99.9% of the energy is absorbed or scattered. The second meter of water will
attenuate 99.9% of the original 0.1% entering and an insignificant amount of
thermal radiation would remain. Thus we conclude that we will only be able to
detect a submarine by thermal radiation only a few meters under the water.
If the submarine were traveling on or near the surface, the surface radiation from
the water heated by the submarine might leave a thermal wake which might be
detectable. However, detecting thermal radiation directly from the submarine at a
depth greater than a few meters would be very difficult if not impossible and
submarines usually travel at much greater depths.
We know that in clear water we can visually see a submarine at a much greater depth
than a few meters because of the blue - green "window" in water; however, the
thermal radiation from the submarine at these wavelengths is negligible.
despues sigo "refutando" sus dichos!
saludos.
