heat-transfer coefficient

heat-transfer coefficient

[′hēt ¦tranz·fər ‚kō·i′fish·ənt]
(thermodynamics)
The amount of heat which passes through a unit area of a medium or system in a unit time when the temperature difference between the boundaries of the system is 1 degree.
References in periodicals archive ?
r] = radiation heat-transfer coefficient from the top surface to the bottom surface of the air channel, W x [K.
Then there is a heat-transfer coefficient for the "gap" between the polymer and the roll surface.
Users plug in the profile shape and material, and the computer simulates the cooling time needed by calculating the convection heat-transfer coefficient from the profile into the coolant, while taking into account how profile mechanical properties are impacted by specific cooling times.
h can be estimated from standard heat-transfer coefficient correlations appropriate to the type of bean-air contacting involved.
The rate of crystallization increases with 1) increase in air speed or 2) decrease in ambient temperature; the former raises the average convective heat-transfer coefficient more than the latter.
The specific surface area of the bulk material is inversely proportional to the particle diameter, while the heat-transfer coefficient generally becomes smaller with increasing particle diameter.
Analysis had shown that with increased line speed, the heat-transfer coefficient between the sheet and the rolls decreased.
Purdue University researchers have shown that the technology increased the heat-transfer coefficient, which describes the cooling rate, by as much as 250 percent.
2] D = diameter, m Gz = Graetz number, DRePr/L, dimensionless h = heat-transfer coefficient, W [m.
With the Fourier number, the effect of the internal heat-transfer coefficient can be calculated and separated from the external heat-transfer coefficient.
Heat-Transfer Coefficients in Hydrocooling of Spherical and Cylindrical Food Products.