Many problems encountered in practice are two-dimensional or three-dimensional and are related to somewhat complicated geometric configurations for which no simple solutions are available. An important class of heat transfer problems for which simple solutions are obtained encompasses those involving two surfaces that are held at constant temperatures T1 and T2.
es: Factor de forma de conducción
Convection resistance
Conjunction
Convection resistance can be defined as the inverse of the convection heat transfer coefficient per unit area, since it is defined as Rconv = 1hA
es: Resistencia a la convección
Critical radius of insulation
Conjunction
In a flat wall, the area perpendicular to the direction of heat flow that adds more insulation to a wall always decreases heat transfer. The thicker the insulation, the lower the heat transfer rate.
es: Radio crítico de aislamiento
Cylinder conduction resistance
Conjunction
If the temperatures of the fluids, inside and outside the tube, remain constant, then the heat transfer through that tube is stationary. Therefore, the heat transfer through the tube can be considered stationary and one-dimensional.
es: Resistencia de conducción del cilindro
Efficiency
Conjunction
Efficiency is the 'ability to have someone or something to achieve the proper performance of a function.
es: Eficiencia
Fin effectiveness
Conjunction
The efficiency of a fin is the relationship that exists between the heat (Qf) that is transferred from a fin under certain conditions, and the maximum heat transfer (Qmax) that would exist if that fin were at the maximum temperature (the temperature of the base).
es: Eficacia de la aleta
Fin efficiency
Conjunction
The efficiency of a fin is the relationship that exists between the heat (Qf) that is transferred from a fin under certain conditions, and the maximum heat transfer (Qmax) that would exist if that fin were at the maximum temperature (the temperature of the base).
es: Eficiencia de las aletas
Interface resistance
Conjunction
Decreased heat flow caused by imperfect contact between two materials at an interface.
es: Resistencia de interfaz
Plane wall conduction resistance
Conjunction
The heat transfer through the composite wall can be calculated from these resistances. The constant heat transfer rate between two surfaces is equal to the temperature difference divided by the total thermal resistance between those two surfaces.
es: Resistencia a la conducción de la pared plana
Radiation resistance
Conjunction
Radiation resistance is the act of manufacturing electronic components and systems that are resistant to damage or malfunction caused by ionizing radiation (high-energy electromagnetic and particulate radiation), such as those found in outer space, high-altitude flights , around nuclear reactors and particle accelerators or in nuclear accidents.
es: Resistencia a la radiación
Sphere conduction resistance
Conjunction
Now consider the one-dimensional steady-state flow of heat through a cylindrical or spherical layer that is exposed to convection on both sides into fluids that are at temperatures T∞1 and T∞2, with heat transfer coefficients h1 and h2, respectively. In this case, the network of thermal resistances consists of a resistance to conduction and two to convection, in series, precisely like that for the flat wall and the rate of heat transfer under stationary conditions
es: Resistencia a la conducción de la esfera
Surfaces
Conjunction
A surface can be defined as a set of points in a Euclidean space that forms a three-dimensional topological space, which locally, that is to say, seen up close, resembles two-dimensional Euclidean space.
es: Superficies
Thermal contact conductance
Conjunction
the thermal contact resistance [m 2 .K / W] represents the heat conduction between two solid bodies. When components are bolted or pressed together, a knowledge of the thermal performance of such joints is also needed.
es: Conductancia de contacto térmico
Thermal contact resistance
Conjunction
Contact resistance is highly dependent on surface roughness. The pressure that holds the two surfaces together also influences the contact resistance.
es: Resistencia al contacto térmico
Total thermal resistance
Conjunction
The thermal resistance of a material represents the ability of the material to oppose the flow of temperature. In the case of homogeneous materials, it is the ratio between the thickness and the thermal conductivity of the material; in inhomogeneous materials resistance is the inverse of thermal conductance.
