Thermal or heat

Thermal or heat detectors respond to the energy emission from a fire in the form or heat. The normal means by which the detector is activated is by convention currents of heated air or combustion products or by radiation effects. Because this means of activation takes some time to achieve thermal detectors are slower to respond to a fire when compared to some other detection devices. 

Someone suggests that thermal (or heat) radiation can also be vievs ed as mass radiation since, according to Einstein s formula, an energy transfer in the amount of conespoiids to a mass transfer in the amount of m = E/c. What do you Uiink ... 

They belong to the category of thermal or heat lows because they result from the sea-air heat transfer (Mader, 1985 Gregor, 1986). 

One of the driving questions for the study of seafloor hydrothermal systems is to understand their net flux to the ocean in terms of energy (thermal and chemical) and mass. The thermal, or heat, energy they carry is believed to be relatively well constrained, as various independent ways of estimating this flux provide similar values. The mass of chemicals they add and/or remove remains problematic. In some cases whether hydrothermal activity is a net source or sink for particular elements remains unresolved as well. In addition to absolute concentrations, or concentrations normalized to the chloride content, the isotopic signature of various species can also be used to constrain the source and sink terms, as well as helping to identify the important processes occurring within the hydrothermal circulation cell. 

Like most rules of thumb, this one, too, may lead to dangerous misjudgments with respect to the thermal process safety, if not applied correctly. The following shall demonstrate this. One of the fundamental theories used for the safety assessment of exothermic chemical reactions is explained in detail in Chapter 4.2 the thermal or heat explosion theory by Semenov [18], The central statement of this theory is that an explosion-like runaway of an exothermic chemical reaction will always occur... 

Possible processes are limited by the nature of system boundaries and by conditions in the surroundings. The kinds of processes allowed by particular boundaries are listed in Table 1.3. Often we cause a particular process to occur by bringing the system into contact with a reservoir that forces a particular system property to remain constant. Common reservoirs include the thermal (or heat) reservoir, which maintains the system at a constant temperature (an isothermal process), and the mechanical reservoir, which imposes its pressure on the system (isobaric process). 

Fftgfe thermal conductivity. Some metals are much better conductors of heat than others. Try a sterling silver spoon in a cup of hot coffee or tea. Compare its thermal, or heat, conductivity with that of a stainless steel spoon. 

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