Abstract:
The invention relates to a method for producing form bodies for heat exchangers comprising a thermomagnetic material, wherein the form bodies have channels for conducting a fluid heat exchange medium, wherein a powder of the thermomagnetic material is introduced to a bonding agent, the resulting moulding material is applied to a carrier by a pressure process and the bonding agent is removed and then the resulting green body and, if applicable the carrier, are sintered.
Abstract:
The invention relates to a thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work and which works at temperatures in the range of -20°C to 200°C. Said thermomagnetic generator comprises a thermomagnetic material which is e.g. selected from (1) compounds of general formula (I): (AyBy-1)2+dCwDxEz (I), wherein A represents Mn or Co; B represents Fe, Cr or Ni; C, D, E represent elements C, D, E at least two of which are different, have a not insignificant concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, at least one of C, D and E representing Ge or Si; d is a number in the range of -0.1 to 0.1; w, x, y, z are numbers in the range of 0 to 1, w + x + z = 1.
Abstract translation:热磁发电机,所述热能转化为电能的转化而无需中间转换成机械功,在温度范围从-20℃至200℃下操作,含有热磁材料,其例如由式(1)如下通式的化合物中选择 (I)(AyBy-1)2 + dCwDxEz(I)与所述含义:锰或Co; 乙的Fe,Cr或Ni中 C,D,至少ë两个C,D,E的彼此不同的,有一个非零浓度和选自P,B,硒,锗,镓,硅,锡,N,As和Sb中选择,其中,至少一个 的C,D和E为Ge或Si; 在-0.1〜0.1的范围d号码; W,X,Y,Z是数字范围从0到1,其中w + X + Z = 1。
Abstract:
The invention relates to a packed heat exchanger bed made of thermomagnetic material particles, comprising an average diameter in the range of 50 µm to 1 mm and resulting in a porosity in the range of 30 to 45% in the packed bed, and a heat exchanger bed made of a thermomagnetic material monolith comprising through channels having a cross-sectional area of the individual channels in the range of 0.001 to 0.2 mm2 and a wall thickness of 50 to 300 µm, having a porosity in the range of 10 to 60%, and having a ratio of surface area to volume in the range of 3000 to 50000 m2/m3, or comprising a plurality of parallel plates having a plate thickness from 0.1 to 2 mm and a plate spacing distance of 0.05 to 1 mm.
Abstract:
material magnetocalórico, processo para a produção dos materiais magnetocalóricos, e, uso dos materiais magnetocalóricos. são descritos materiais magnetocalóricos da fórmula geral (mn~ 2~, fe~ 1-x~)2+z^ p^ 1-y ^si^, onde 0,55
Abstract:
A thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work and which works at temperatures in the range from -20° C. to 200° C. comprises a thermomagnetic material selected from, for example, (1) compounds of the general formula (I) (AyBy-1)2+deltaCwDxEz(I) where A is Mn or Co, B is Fe, Cr or Ni, C, D and E at least two of C, D and E are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, where at least one of C, D and E is Ge or Si, delta is a number in the range from -0.1 to 0.1, w, x, y, z are numbers in the range from 0 to 1, where w+x+z=1.
Abstract:
Disclosed is a thermomagnetic generator which converts thermal energy to electrical energy without intermediate conversion to mechanical work, and comprises a series of at least three different metal-based thermomagnetic materials whose magnetocaloric effect occurs at different temperatures, such that the conversion of thermal energy to electrical energy can exploit an enlarged temperature range. The compounds suitable for the invention are selected from: (1) (AyBy-1)2+äCwDxEz Where A is Mn or Co, B is Fe, Cr or Ni, C, D and E at least two of C, D and E are different, have a non-vanishing concentration and are selected from P, B, Se, Ge, Ga, Si, Sn, N, As and Sb, where at least one of C, D and E is Ge or Si, (2) La(FexAl1-x)13Hy or La(FexSi1-x)13Hy (II) La(FexAlyCoz)13 or La(FexSiyCoz)13 (III) LaMnxFe2-xGe (IV) 4) Gd5(SixGe1-x)4 (V) (5) Fe2P-based compounds, (6) manganites of the perovskite type, (7) Tb5(Si4-xGex) (VI) or XTiGe (VII) where X = Dy, Ho, Tm, (8) Mn2-xZxSb (VIII) or Mn2ZxSb1-x (IX)
Abstract:
The invention relates to a packed heat exchanger bed made of thermomagnetic material particles, comprising an average diameter in the range of 50 µm to 1 mm and resulting in a porosity in the range of 30 to 45% in the packed bed, and a heat exchanger bed made of a thermomagnetic material monolith comprising through channels having a cross-sectional area of the individual channels in the range of 0.001 to 0.2 mm2 and a wall thickness of 50 to 300 µm, having a porosity in the range of 10 to 60%, and having a ratio of surface area to volume in the range of 3000 to 50000 m2/m3, or comprising a plurality of parallel plates having a plate thickness from 0.1 to 2 mm and a plate spacing distance of 0.05 to 1 mm.