In this glossary, you will find vocabulary and key concepts from "Chapter Two Summary" on page 111 of your book "Heat transfer, a practical approach".
Boundary conditions
plural noun
Are the mathematical expressions for the thermal conditions at the boundaries.
Example: The most common boundary conditions are the specified temperature, specified heat flux, convection, and radiation boundary conditions.
es: Condiciones de contorno, Condiciones de frontera
Emissivity
noun
Is the ratio of the radiant energy emitted by a surface to that emitted by a black body at the same temperature.
Example: The amount of light emitted at a particular temperature is determined by the emissivity of the surface.
es: Emisividad
Energy balance
noun
Is a consideration of the energy input, output, and consumption or generation in a process or stage.
Example: When determining an energy balance, you need to know what energy is being transferred in and out of the system.
es: Balance energético, Balance de energía
Heat conduction equation
noun
Is the mathematical equation which describes the transfer of thermal energy between molecules.
Example: The heat conduction equation can be derived by performing an energy balance on a differential volume element.
es: Ecuación de conducción térmica
Heat flux
noun
Is the rate of heat transfer per unit area.
Example: A boundary surface, in general, may involve specified heat flux, convection, and radiation at the same time.
es: Flujo térmico, Flujo de calor
Heat generation
noun
In heat transfer analysis, is the conversion of electrical, chemical, or nuclear energy into heat (or thermal) energy.
Example: The energy comes from a buffer storage tank that can be previously fed from a range of different heat generation systems.
es: Generación de calor
Initial condition
noun
In heat transfer analysis, is a mathematical expression for the temperature distribution of the medium initially.
Example: The simulator provides the downloading of the exercise, which describes the initial condition and approximate training scenario.
es: Condición inicial
Insulation
noun
Is something which is put on or around a container, pipe, or vessel to prevent loss of heat.
Example: The insulation and jacket cover the tank walls and optimize the thermal heat efficiency of the tank.
es: Aislamiento térmico, Aislante, Aislamiento
Internal energy
noun
Represents the molecular energy of a system, and it consists of sensible, latent, chemical, and nuclear forms.
Example: The sensible and latent forms of internal energy can be transferred from one medium to another as a result of a temperature difference, and are referred to as heat or thermal energy.
es: Energía interna, Energía interior
Steady state
noun
In heat transfer, is when the temperature does not vary with time.
Example: The unit will transition back to the frozen steady state mode when the temperature rises back to the transition point.
es: Estado estable, Estado estacionario
Thermal conductivity
noun
Is the amount of heat per unit time per unit area that can be conducted through a plate of unit thickness of a given material, the faces of the plate differing by one unit of temperature.
Example: The thermal conductivity of the filler gas decreases in proportion to the size of the gas atoms (mass and diameter).
es: Conductividad térmica
Thermal diffusivity
noun
Is the thermal conductivity divided by density and specific heat capacity at constant pressure. It measures the ability of a material to conduct thermal energy relative to its ability to store thermal energy.
Example: The key to a good phase shift depends on its thermal diffusivity (a) that is to say its ability to quickly transmit a temperature change.
es: Difusividad térmica
Thermal symmetry
noun
Is a heat transfer problem that is symmetric about a plane, line, or point.
Example: The thermal symmetry boundary condition is a mathematical expression of this thermal symmetry.
es: Simetría térmica
Thickness
noun
The distance between opposite sides of something.
Example: The power of the cutting device needs to be adjusted according to the thickness of the substrate.
es: Espesor, Grosor
Transient state
noun
In heat transfer, is when the temperature varies with time.
Example: The synchronous power swing test case simulates a transient state oscillation that returns to a stable state.
