Words that will be used during the first unit of the heat transfer module
Conduction shape factor
Noun
S is the conduction form factor, which has the dimension of length, and k is the thermal conductivity of the medium between the surfaces.
Example: The conduction factor only depends on the geometric configuration of the system.
es: Factor de forma de conducción
Convection resistance
Noun
Convection resistance can be defined as the inverse of the convection heat transfer coefficient per unit area.
Example: The convection and radiation resistances on a surface are in parallel rather than in series.
es: Resistencia a la convección
Critical radius of insulation
Noun
The critical insulation radius is the measure of the radius of an insulator in which the heat transfer is maximum or the resistance of the heat flow is very low, so when placing an insulating material it must be verified that the external radius of this is greater than the critical radius or that the critical radius is less than the radius of the outer cylinder, so that it duly complies with its insulating property.
Example: The Critical Radius is precisely the measure of the radius of a
insulator in which the heat transfer is maximum or the
heat flow resistance is very low.
es: Radio crítico de aislamiento
Cylinder conduction resistance
Noun
In stationary operation there is no change in tube temperature with time at any point. Therefore, the rate of heat transfer into the tube must be equal to the rate of transfer out of the tube.
Example: The cylindrical conductivity resistance concept can be used with multilayer cylindrical walls.
es: Resistencia de conducción del cilindro
Efficiency
Noun
The efficiency e compares the actual heat transfer rate, which is that absorbed by the heating fluid, with the maximum heat transfer rate that could be transmitted in a countercurrent exchanger with an infinite exchange surface.
es: Eficiencia
Fin effectiveness
Noun
It increases heat transfer from a source because they increase the effective surface area, but the fin as such represents a resistance to heat conduction.
es: Eficacia de la aleta
Fin efficiency
Noun
EFFICIENCY of a fin is the relationship between the thermal power (Q-point) that is dissipated in it and the thermal power that would be dissipated if the entire fin were at a temperature equal to that of the base (the temperature of the fin will be lower than the base).
Example: Fin efficiency is the ratio of the heat actually transferred to the heat transferred by an ideal fin.
es: Eficiencia de las aletas
Interface resistance
Noun
The usefulness of the analogy between the flow of electric current and the flow of heat becomes apparent when a satisfactory description of heat transfer at the interface of two conducting media is needed.
es: Resistencia de interfaz
Plane wall conduction resistance
Noun
Heat flows in a direction perpendicular to the surface. If the thermal conductivity is uniform.
es: Resistencia a la conducción de la pared plana
Radiation resistance
Noun
The radiation resistance of a surface are in parallel rather than in series.
es: Resistencia a la radiación
Sphere conduction resistance
Noun
Spherical systems can also be treated as one-dimensional when the temperature is a function of radius only.
es: Resistencia a la conducción de la esfera
Surfaces
Noun
Finned surfaces are commonly used in practice to enhance heat transfer. Fins enhance heat transfer from a surface by exposing a larger surface area to convection.
Example: When additional surfaces are added to a primary surface, they are known as extended surfaces or fins.
es: Superficie
Thermal contact conductance
Noun
Thermal contact conductance [W / m 2 .K] or thermal contact resistance [m 2 .K / W] represents heat conduction between two solid bodies.
Example: Contact resistance is highly dependent on surface roughness.
es: Conductancia de contacto térmico
Thermal contact resistance
Noun
q is known as contact resistance, and q develops when the two materials do not fit exactly together, so a thin layer of fluid can be trapped between the two surfaces.
Example: Thermal contact resistance can be minimized by applying a heat conductive liquid called thermal grease.
es: Resistencia al contacto térmico
Total thermal resistance
Noun
The thermal resistance of a material represents the ability of the material to oppose the flow of temperature
Example: Rtotal is the TOTAL THERMAL RESISTANCE between the two media.
