Batteries: thermoelectric and photoelectric – Thermoelectric – Processes
Reexamination Certificate
2007-01-23
2007-01-23
Diamond, Alan (Department: 1753)
Batteries: thermoelectric and photoelectric
Thermoelectric
Processes
C136S236100, C136S239000, C136S240000, C136S242000, C257S467000, C257S470000, C438S048000, C438S054000
Reexamination Certificate
active
10235230
ABSTRACT:
In devices used for the direct conversion of heat into electricity, or vice versa, known in the art as thermoelectric power generators, thermoelectric refrigerators and thermoelectric heat pumps, the efficiency of energy conversion and/or coefficient of performance have been considerably lower than those of conventional reciprocating or rotary, heat engines and/or vapor-compression systems, employing certain refrigerants. The energy conversion efficiency of power generating devices, for example, aside from the hot and cold junction temperatures, also depends on a parameter known in the art as the thermoelectric figure of merit Z=S2σ/k, where S is the thermoelectric power, σ is the electrical conductivity and k is the thermal conductivity, of the material that constitutes the p-type, and/or n-type, thermoelements, or branches, of the said devices. In order to achieve a considerable increase in the energy conversion efficiency, a thermoelectric figure of merit of the order of 10−2K−1, or more, is needed. It is reasonably expected that such an order of magnitude, for the figure of merit, can be realized with a composition of matter, comprising magnesium, silicon, lead and barium, and optionally comprising one, or more, additional doping materials.
REFERENCES:
patent: 3298777 (1967-01-01), Brixner
patent: 3782927 (1974-01-01), Nicolaou
patent: 6225550 (2001-05-01), Hornbostel et al.
patent: 6525260 (2003-02-01), Yamashita et al.
patent: 2002-285274 (2002-10-01), None
Kajikawa et al, “Thermoelectric properties of sintered magnesium compounds,” 15th International Conference on Thermoelectrics, pp. 128-132 (1996).
Kajikawa et al, “Thermoelectric figure of merit impurity doped and hot-pressed magnesium silicide elements,” 17th International Conference on Thermoelectrics, pp. 362-369 (1998).
Diamond Alan
Gauthier & Connors LLP
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