Solar Thermoelectric Generators

The physical characteristics, thermoelectric power, resistivity, specific heat conductivity, and the temperature difference between hot and cold junctions determine the efficiency of thermocouple materials. These data have been determined for Chromel P‐constantan, bismuth alloys, and the intermetallic compound ZnSb, containing small amounts of added metals.The optimum characteristics of flat‐plate type solar energy collectors have been evaluated in combination with thermocouples, designed for maximum energy conversion. Using flat‐plate collectors with 2 glass panes, an efficiency of 0.63 percent was obtained with the ZnSb‐type alloys in combination with a negative Bi‐alloy. The commercially available ductile alloys Chromel P‐constantan, produced ten times lower efficiency. Calculations indicate that the efficiency may be increased to 1.05 percent by using 4 panes of low‐reflection characteristics.With solar energy concentrating means (lenses), the efficiency was increased to 3.35 percent, using the above ...

[1]  L. Harris.  Thermocouples for the Measurement of Small Intensities of Radiations , 1934 .

[2]  F. A. Firestone.  RADIATION THERMOPILE DESIGN , 1930 .

[3]  John Strong,et al.  Procedures in Experimental Physics , 1938 .

[4]  V. Z. Williams.  Infra-red instrumentation and techniques. , 1948, The Review of scientific instruments.

[5]  D. Hornig,et al.  The design of fast thermopiles and the ultimate sensitivity of thermal detectors. , 1947, The Review of scientific instruments.

[6]  V. Zworykin,et al.  Photoelectricity : and its application , 1949 .

[7]  E. Rabinowitch.  Electron Transfer Spectra and Their Photochemical Effects , 1942 .

[8]  A. W. Crook,et al.  The reflection and transmission of light by any system of parallel isotropic films. , 1948, Journal of the Optical Society of America.

[9]  E. Rabinowitch.  The Photogalvanic Effect II. The Photogalvanic Properties of the Thionine‐Iron System , 1940 .

[10]  I. Langmuir.  MY TRIP TO RUSSIA , 1946 .

[11]  H. Emmons.  The theory and application of extended surface thermocouples , 1940 .

[12]  Dynamic Impedance and Sensitivity of Radiation Thermocouples , 1949 .

[13]  John Strong,et al.  On a method of decreasing the reflection from nonmetallic substances , 1936 .

[14]  M. Hansen.  Der Aufbau der Zweistofflegierungen : eine kritische Zusammenfassung , 1936 .

[15]  E. Rabinowitch.  The Photogalvanic Effect I. The Photochemical Properties of the Thionine‐Iron System , 1940 .

[16]  K. B. Blodgett.  Use of Interference to Extinguish Reflection of Light from Glass , 1939 .

[17]  L. B. Lockhart,et al.  Experimental and Theoretical Results in Two-Layer Low Reflecting Coatings for Glass , 1946 .

[18]  O. D. Black,et al.  The Photovoltaic Effect. , 1942 .

[19]  C. H. Cartwright.  GENERAL THEORY, DESIGN, AND CONSTRUCTION OF SENSITIVE VACUUM THERMOPILES (PART I)A More Complete Theory of Vacuum Thermopile Design for N Junctions for Four Types of Construction , 1930 .

[20]  R. Jones,et al.  Factors of merit for radiation detectors. , 1949, Journal of the Optical Society of America.

[21]  R. V. Jones,et al.  The design and construction of thermoelectric cells , 1934 .

[22]  J. Strong.  Notes on Radiation Thermopiles , 1932 .

[23]  Maria Telkes,et al.  The Efficiency of Thermoelectric Generators. I. , 1947 .

[24]  R. Jones,et al.  The ultimate sensitivity of radiation detectors. , 1947, Journal of the Optical Society of America.