96/00435 A conceptual scheme for electrical power generation from nuclear waste heat using liquid metal magnetohydrodynamic energy converter

1996 ◽  
Vol 37 (1) ◽  
pp. 26
Science ◽  
2020 ◽  
Vol 367 (6484) ◽  
pp. 1341-1345 ◽  
Author(s):  
Paul S. Davids ◽  
Jared Kirsch ◽  
Andrew Starbuck ◽  
Robert Jarecki ◽  
Joshua Shank ◽  
...  

Moderate-temperature thermal sources (100° to 400°C) that radiate waste heat are often the by-product of mechanical work, chemical or nuclear reactions, or information processing. We demonstrate conversion of thermal radiation into electrical power using a bipolar grating-coupled complementary metal-oxide-silicon (CMOS) tunnel diode. A two-step photon-assisted tunneling charge pumping mechanism results in separation of charge carriers in pn-junction wells leading to a large open-circuit voltage developed across a load. Electrical power generation from a broadband blackbody thermal source has been experimentally demonstrated with converted power densities of 27 to 61 microwatts per square centimeter for thermal sources between 250° and 400°C. Scalable, efficient conversion of radiated waste heat into electrical power can be used to reduce energy consumption or to power electronics and sensors.


2015 ◽  
Vol 193 (3) ◽  
pp. 17-23 ◽  
Author(s):  
Fumihiko Komatsu ◽  
Manabu Tanaka ◽  
Tomoyuki Murakami ◽  
Yoshihiro Okuno

1977 ◽  
Vol 33 (2) ◽  
pp. 212-222 ◽  
Author(s):  
R. W. Hardie ◽  
J. H. Chamberlin

Author(s):  
J R Bolter

Sir Charles Parsons died some three years after the author was born. In this paper the author looks back at the pioneering work of Parsons in the field of power generation. It shows how he was able to increase output of the steam turbine generator from 7.5 kW in 1884 to 50000 kW in 1930 while increasing efficiency from 1.6 to 36 per cent, and relates these achievements to the current state of the art. Blading design, rotor construction and other aspects of turbine engineering are considered. The conclusion is that Parsons and his associates charted the course which manufacturers and utilities throughout the world have continued to follow, although increasingly sophisticated design and analytical methods have succeeded the intuitive approach of Parsons. His constant search for improved efficiency was and is highly relevant to today's concern for the environment. Finally, although it did not become a practical proposition in his lifetime, the paper reviews Parsons' vision of, and continuing interest in, the gas turbine, first mentioned in his 1884 patents.


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