Thermal conductance
thermal conductance
A measure of the ability of a material to transfer heat per unit time, given one unit area of the material and a temperature gradient through the thickness of the material. It is measured in watts per meter per degree Kelvin.
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noun, Physics. 1. 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. thermal conductivity noun 1. a measure of the ability of a substance to conduct heat, determined by […]
- Thermal-diffusion
noun, Physical Chemistry. 1. the separation of constituents, often isotopes, of a fluid under the influence of a temperature gradient.
- Thermal-efficiency
noun, Thermodynamics. 1. the ratio of the work output of a heat engine to the heat input expressed in the same units of energy. thermal efficiency noun 1. the ratio of the work done by a heat engine to the energy supplied to it Compare efficiency noun in thermodynamics, the amount of work done by […]
- Thermal equator
noun 1. an imaginary line round the earth running through the point on each meridian with the highest average temperature. It lies mainly to the north because of the larger landmasses and therefore greater summer heating
- Thermal-equilibrium
noun, Thermodynamics. 1. the relationship between two systems connected only by a diathermic wall. 2. the relationship between two isolated systems the states of which are such that no net transfer of energy would occur between them if they were connected by a diathermic wall. thermal equilibrium The condition under which two substances in physical […]