IH molar heat of vaporization
To calculate the latent heat of vaporization
of the water of the product (L) for each condition of hygroscopic equilibrium moisture content of the seeds and for each temperature studied, Eq.
where [DELTA][T.sub.sat] is the wall superheat (=[T.sub.s] - [T.sub.sat]), [sigma] is the surface tension of bulk liquid at saturation, [T.sub.l] is the bulk liquid temperature, [v.sub.lv] is the specific volume difference between vapor and liquid (=[v.sub.v] - [v.sub.l]), [L.sub.lv] is the latent heat of vaporization
, and [R.sub.c] is the radius of liquid/vapor interface curvature in a cavity.
where [e.sub.s] is the saturation vapor pressure (Pa), [e.sub.0] is the vapor pressure at the triple point of water (611.12 Pa), [l.sub.[upsilon]] is the latent heat of vaporization
(equal to 2.5008 x [10.sup.6] J [kg.sup.-1] at 0[degrees]C, decreasing by about 10% as temperature increases to 100[degrees]C), [R.sub.[upsilon]] is the individual gas constant for vapor (461.2 J [kg.sup.-1] [K.sup.-1]), [T.sub.0] is the temperature at the triple point (273.16 K), and T is the temperature (K) (Miller 2015).
where [r.sub.d]--latent heat of vaporization
at condensation temperature.
A comparison of the heat of vaporization
values obtained (for characteristic values see column 5, Table) with those of pure compounds at the same temperatures (from ) suggests that somewhat lower molecular weight values should have been used in the calculations.
Bi-phase or phase-transition heat spreaders and heat pipes, commonly found in laptop computers and other highly dense electronic assemblies, take advantage of the large heat of vaporization
exhibited by readily available liquids.
Refrigerant selection is based on the cooling requirements and the latent heat of vaporization
of refrigerant itself.
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