Thermoelectric sentence example

thermoelectric
  • The order of the metals in respect of the Peltier effect was found to be the same as the thermoelectric series.
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  • (2) If the Peltier effect was proportional to the thermoelectric power and changed sign with it, as all experiments appeared to indicate, there would A B be no absorption of heat C in the circuit due to the Peltier effect, and therefore no thermal source to account for the energy of the current, in the case in which the hot junction was at or above the neutral temperature.
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  • Thermoelectric Relations.
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  • the hot junction is raised to 270 C., at which temperature the thermoelectric power vanishes and the metals are said to be neutral to one another.
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  • Edin., 1851) that this conclusion was inconsistent with the known facts of thermoelectric inversion.
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  • In 1873 he took thermoelectricity for the subject of his discourse as Rede lecturer at Cambridge, and in the same year he presented the first sketch of his well-known thermoelectric diagram before the Royal Society of Edinburgh.
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  • If then oscillations are sent through the other pair heat is produced at the junction and the galvanometer indicates a thermoelectric current (Wied.
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  • This thermoelectric receiver was made vastly more sensitive by W.
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  • - The limiting value, dE/dt, of the coefficient, p, for an infinitesimal difference, dt, between the junctions is called the Thermoelectric Power of the couple.
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  • But on account of the difficulty of the measurements involved, the verification of the accurate relation between the Peltier effect and thermoelectric power was left to more recent times.
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  • For high temperature work it is necessary to employ platinum, which would be an ideal standard for all purposes on account of its constancy and infusibility, did not the thermoelectric properties of different specimens differ considerably.
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  • We have also the relations dE/dt = b+2ct and d 2 E/dt 2 =2C. The first relation gives the thermoelectric power p at any temperature, and is probably the most convenient method of stating results in all cases in which this formula is applicable.
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  • The value of the thermoelectric power dE/dt at 50° C. is taken as the mean value between o° and 100° C., over which range it can be most accurately determined.
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  • Becquerel that the intensity of the effect depended on the thermoelectric power of the junction and was independent of its form or dimensions.
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  • The balance is adjusted by shunting either AD or BD with a box, S, containing 20 to Ioo ohms. All the wires in the quadrilateral must be of the same metal as AB, to avoid accidental thermoelectric effects which would obscure the result.
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  • Mag., December 1852), to make experiments to verify quantitatively the relation P/T =dE/dT between the Peltier effect and the thermoelectric power.
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  • Subsequent experiments led him to doubt this conclusion as regards conductivity, but his thermoelectric experiments (Proc. R.
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  • In accordance with this hypothesis, the curves representing the variations of thermoelectric power, dE/dt, with temperature 'OObservationsof' Pia.
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  • p. 201, 1867) made a number of relative measurements of the effect in different metals, which agreed qualitatively with observations of the thermoelectric power, and showed that the effect was proportional to the current for a given temperature gradient.
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  • The general results of the work appeared to support Tait's hypothesis that the effect was proportional to the absolute temperature, but direct thermoelectric tests do not appear to have been made on the specimens employed, which would have afforded a valuable confirmation by the comparison of the values of d 2 E/dT 2, as in Jahn's experiments.
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  • The value found at a temperature of 150° C. was +2.5 microjoules per ampere-second per degree, or +2.5 microvolts per degree in the case of copper, which agrees very fairly with the value deduced from thermoelectric tests.
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  • - It is instructive to consider the distribution of potential in a thermoelectric circuit, and its relation to the resultant E.M.F.
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  • - It is now generally conceded that the relatively large differences of potential observable with an electrometer between metals on open circuit, as discovered by Volta, are due to the chemical affinities of the metals, and have no direct relation to thermoelectric phenomena or to the Peltier effect.
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  • dE, namely, dE =dP+(s' - s")dT = (P/T)dT = pdT = (p" - p')dT, in which the coefficient, P, of the Peltier effect, and the thermoelectric power, p, of the couple, may be expressed in terms of the difference of the thermoelectric powers, p and p", of the separate metals with respect to a neutral standard.
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  • The line of lead is taken to be horizontal in the diagram, because the thermoelectric power, p, may be reckoned from any convenient zero.
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  • The " thermoelectric constant," 0, of Kohlrausch, is evidently the same as the thermoelectric power, p, in Thomson's theory.
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  • It is difficult to see how this complication can be avoided, unless the first postulate is abandoned, and the heat-flow due to conduction is assumed to be independent of the thermoelectric phenomena.
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  • 96, p. 1258) gives a theoretical discussion of all possible forms of expression for thermoelectric phenomena.
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  • p = dE/dt = Thermoelectric Power.
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  • The HPM incorporates drive electronics for those laser diodes with a built-in thermoelectric cooler.
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  • thermoelectric cooler.
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  • thermoelectric generator (TEG) used to convert temperature differences into electrical power.
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  • thermoelectric device which works on the Peltier effect.
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  • thermoelectric power.
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  • thermoelectric materials can also be used in cryotherapy, pacemakers, and as thermocouple sensors.
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  • thermoelectric coupling effects can also be considered.
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  • Another form of thermoelectric receiver has been devised by J.
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  • The radiation passing out from an opening in the furnace falls upon a concave mirror in a telescope and is focused upon a thermoelectric couple.
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  • Its electrical conductivity is approximately 1.2, silver at 0° being taken as 100; it is the most diamagnetic substance known, and its thermoelectric properties render it especially valuable for the construction of thermopiles.
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  • (The mean change, 2c = d 2 E/dt 2, of the thermoelectric power per degree C. over the range covered by the experiments, is added in each case.) Explanation of Table.-The figures marked with an asterisk (*) represent discrepancies which are probably caused by impurities in the specimens.
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  • The value of the thermoelectric power dE/dt at 50° C. is taken as the mean value between o° and 100° C., over which range it can be most accurately determined.
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  • The value found at a temperature of 150° C. was +2.5 microjoules per ampere-second per degree, or +2.5 microvolts per degree in the case of copper, which agrees very fairly with the value deduced from thermoelectric tests.
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  • A typical thermoelectric generator (TEG) used to convert temperature differences into electrical power.
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  • Semi conductor thermoelectric device which works on the Peltier effect.
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  • Explain what is meant by the Peltier coefficient and thermoelectric power.
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  • Thermoelectric materials can also be used in cryotherapy, pacemakers, and as thermocouple sensors.
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  • Problems with thermoelectric coupling effects can also be considered.
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  • The single bottle chillers are designed to chill your wine by either spraying the wine bottle with jets of ice water once it is placed in the machine or through a cooling electronic current called thermoelectric cooling.
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  • Depending on the make, model and how much you are willing to spend, there are also floor model chillers available that use thermoelectric cooling to chill its contents.
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  • These are smaller versions of the floor models and chill your wine by thermoelectric cooling.
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  • The second type is through thermoelectric cooling.
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  • Thermoelectric cooling is also known as the Peltier effect.
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  • Their wine chiller uses the thermoelectric cooling method, comes with ten pre-set temperatures and has a reasonable price tag of $59.95.
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  • It uses the thermoelectric cooling method to chill your bottles of wine and features a backlit LED display as well as an alarm that sounds when the wine has reached its' desired temperature.
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  • Sunpentown WC-06 Thermoelectric wine cooler - This super-sleek wine chiller comes in a platinum finish and holds up to six bottles of wine.
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  • It uses thermoelectric cooling so it runs very quietly and has LED temperature readout with an ultra modern stainless steel trim.
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  • Miscellaneous Effects of Magnetization: Electric Conductivity - Hall Effect - Electro-Thermal Relations - Thermoelectric Quality - Elasticity - Chemical and Voltaic Effects.
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  • Its electrical conductivity is approximately 1.2, silver at 0° being taken as 100; it is the most diamagnetic substance known, and its thermoelectric properties render it especially valuable for the construction of thermopiles.
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  • Thermoelectric Power, Series, Inversion.
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  • Seebeck found that the metals could be arranged in a Thermoelectric Series, in the order of their power when combined with any one metal, such that the power of any thermocouple p, composed of the metals A and B, was equal to the algebraic difference (p'-p") of their powers when combined with the standard metal C. The order of the metals in this series was found to be different from that in the corresponding Volta series, and to be considerably affected by variations in purity, hardness and other physical conditions.
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  • Cumming shortly afterwards discovered the phenomenon of Thermoelectric Inversion, or the change of the order of the metals in the thermoelectric series at different temperatures.
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  • Similar phenomena occur in the case of many other couples, and it is found that the thermoelectric power p is not in general a constant, and that the simple linear formula (I) is applicable only for small differences of temperature.
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  • (2) where p', p, &c., are the thermoelectric powers of the metals, and to, t', t", &c., the temperatures of the junctions.
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  • A thermoelectric circuit may be cut at any point and a wire of some other metal introduced without altering the E.M.F.
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