scholarly journals Recent aspects of oxide thermoelectric materials for power generation from mid-to-high temperature heat source

2011 ◽  
Vol 119 (1395) ◽  
pp. 770-775 ◽  
Author(s):  
Michitaka OHTAKI
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Heat Source ◽  
Thermoelectric Materials ◽  
Temperature Heat ◽  
Oxide Thermoelectric Materials

scholarly journals High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

2014 ◽  
Vol 19 (10) ◽  
pp. 101502
Author(s):  
Takahiro Fujimoto ◽  
Yusuke Imai ◽  
Kazuyoku Tei ◽  
Shinobu Ito ◽  
Hideko Kanazawa ◽  
...  
Keyword(s):  
High Temperature ◽  
Heat Source ◽  
Semiconductor Lasers ◽  
Continuous Wave ◽  
Temperature Heat

scholarly journals Understanding the asymmetrical thermoelectric performance for discovering promising thermoelectric materials

2019 ◽  
Vol 5 (6) ◽  
pp. eaav5813 ◽  
Author(s):  
Hangtian Zhu ◽  
Jun Mao ◽  
Zhenzhen Feng ◽  
Jifeng Sun ◽  
Qing Zhu ◽  
...  
Keyword(s):  
Power Generation ◽  
High Temperature ◽  
Thermoelectric Power ◽  
Conversion Efficiency ◽  
Thermoelectric Materials ◽  
The Other ◽  
Thermoelectric Performance ◽  
Cold Side ◽  
P Type ◽  
The Relationship

Thermoelectric modules, consisting of multiple pairs of n- and p-type legs, enable converting heat into electricity and vice versa. However, the thermoelectric performance is often asymmetrical, in that one type outperforms the other. In this paper, we identified the relationship between the asymmetrical thermoelectric performance and the weighted mobility ratio, a correlation that can help predict the thermoelectric performance of unreported materials. Here, a reasonably high ZT for the n-type ZrCoBi-based half-Heuslers is first predicted and then experimentally verified. A high peak ZT of ~1 at 973 K can be realized by ZrCo0.9Ni0.1Bi0.85Sb0.15. The measured heat-to-electricity conversion efficiency for the unicouple of ZrCoBi-based materials can be as high as ~10% at the cold-side temperature of ~303 K and at the hot-side temperature of ~983 K. Our work demonstrates that the ZrCoBi-based half-Heuslers are highly promising for the application of mid- and high-temperature thermoelectric power generation.

A Novel High-Temperature Ejector-Topping Power Cycle

1994 ◽  
Vol 116 (1) ◽  
pp. 1-7 ◽  
Author(s):  
B. Z. Freedman ◽  
N. Lior
Keyword(s):  
High Temperature ◽  
Heat Source ◽  
Gas Turbines ◽  
Saturation Pressure ◽  
Temperature Cycle ◽  
Power Cycle ◽  
Primary Fluid ◽  
Temperature Heat ◽  
Lower Temperature ◽  
Secondary Fluid

A novel, patented topping power cycle is described that takes its energy from a very high-temperature heat source and in which the temperature of the heat sink is still high enough to operate another, conventional power cycle. The top temperature heat source is used to evaporate a low saturation pressure liquid, which serves as the driving fluid for compressing the secondary fluid in an ejector. Due to the inherently simple construction of ejectors, they are well suited for operation at temperatures higher than those that can be used with gas turbines. The gases exiting from the ejector transfer heat to the lower temperature cycle, and are separated by condensing the primary fluid. The secondary gas is then used to drive a turbine. For a system using sodium as the primary fluid and helium as the secondary fluid, and using a bottoming Rankine steam cycle, the overall thermal efficiency can be at least 11 percent better than that of conventional steam Rankine cycles.

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