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thermal insulation value

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  • Thermal insulation — The term thermal insulation can refer to materials used to reduce the rate of heat transfer, or the methods and processes used to reduce heat transfer.Heat energy can be transferred by conduction, convection, radiation or when undergoing a phase… …   Wikipedia

  • Thermal contact conductance — In physics, thermal contact conductance is the study of heat conduction between solid bodies in thermal contact. The thermal contact conductance coefficient, hc, is a property indicating the thermal conductivity, or ability to conduct heat,… …   Wikipedia

  • Thermal transmittance — Thermal transmittance, also known as U value, is the rate of transfer of heat (in watts) through one square metre of a structure divided by the difference in temperature across the structure. It is expressed in watts per square metre per kelvin,… …   Wikipedia

  • Thermal bridge — Temperature distribution in a thermal bridge A thermal bridge, also called a cold bridge,[1] is a fundamental of heat transfer where a penetration of the insulation layer by a highly conductive or noninsulating material takes place in the… …   Wikipedia

  • Thermal conductivity — In physics, thermal conductivity, k, is the property of a material that indicates its ability to conduct heat. It appears primarily in Fourier s Law for heat conduction.First, we define heat conduction by the formula::: H=frac{Delta Q}{Delta t}=k …   Wikipedia

  • Thermal comfort — Human thermal comfort is defined by ASHRAE as the state of mind that expresses satisfaction with the surrounding environment (ASHRAE Standard 55). Maintaining thermal comfort for occupants of buildings or other enclosures is one of the important… …   Wikipedia

  • Thermal conduction — In heat transfer, conduction (or heat conduction) is a mode of transfer of energy within and between bodies of matter, due to a temperature gradient. Conduction means collisional and diffusive transfer of kinetic energy of particles of ponderable …   Wikipedia

  • Thermal flywheel effect — The thermal flywheel effect, sometimes also referred to as Thermal Momentum , is a term used to describe the property of a material to remain at a given temperature. It is generally applied to buildings or construction materials. This is distinct …   Wikipedia

  • Insulation, thermal —   A material having a relatively high resistance of heat flow and used principally to retard heat flow. See R VALUE.   California Energy Comission. Dictionary of Energy Terms …   Energy terms

  • R-value (insulation) — The R value or R value is a measure of thermal resistance (K·m²/W) [Oak Ridge National Laboratory, [http://www.ornl.gov/sci/roofs+walls/insulation/ins 02.html Which Kind Of Insulation Is Best?] , retrieved 2008 07 13.] used in the building and… …   Wikipedia

  • Building insulation materials — A selection of insulation materials can aid in building insulation. All of these are based on standard principles of thermal insulation. Materials used to reduce heat transfer by conduction, radiation or convection are employed in varying… …   Wikipedia

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