scholarly journals A record thermoelectric efficiency in tellurium-free modules for low-grade waste heat recovery

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Zhonglin Bu ◽  
Xinyue Zhang ◽  
Yixin Hu ◽  
Zhiwei Chen ◽  
Siqi Lin ◽  
...  
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Fossil Fuels ◽  
Waste Heat ◽  
Raw Materials ◽  
Raw Material ◽  
Environmental Crisis ◽  
Low Grade ◽  
Thermoelectric Efficiency ◽  
Low Grade Heat

AbstractLow-grade heat accounts for >50% of the total dissipated heat sources in industries. An efficient recovery of low-grade heat into useful electricity not only reduces the consumption of fossil-fuels but also releases the subsequential environmental-crisis. Thermoelectricity offers an ideal solution, yet low-temperature efficient materials have continuously been limited to Bi2Te3-alloys since the discovery in 1950s. Scarcity of tellurium and the strong property anisotropy cause high-cost in both raw-materials and synthesis/processing. Here we demonstrate cheap polycrystalline antimonides for even more efficient thermoelectric waste-heat recovery within 600 K than conventional tellurides. This is enabled by a design of Ni/Fe/Mg3SbBi and Ni/Sb/CdSb contacts for both a prevention of chemical diffusion and a low interfacial resistivity, realizing a record and stable module efficiency at a temperature difference of 270 K. In addition, the raw-material cost  to the output power ratio in this work is reduced to be only 1/15 of that of conventional Bi2Te3-modules.

Volumetric expanders for low grade heat and waste heat recovery applications

2016 ◽  
Vol 57 ◽  
pp. 1090-1109 ◽  
Author(s):  
Muhammad Imran ◽  
Muhammad Usman ◽  
Byung-Sik Park ◽  
Dong-Hyun Lee
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Low Grade ◽  
Low Grade Heat

Waste Heat Recovery From Porous LPG Gas Burner Used for Cooking

2014 ◽  
Author(s):  
Narayana Vijesh Ravindran ◽  
ArulmozhiVarman Seetharaman
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Radiant Heat ◽  
Surface Radiation ◽  
Low Grade ◽  
Heat Surface ◽  
Participating Media ◽  
Low Grade Heat ◽  
Copper Coil

Generally in cooking devices three modes of heat transfer takes place (conduction, convection and radiation). Heat is transferred to the utensils mainly due to conduction and convection. A considerable amount of heat in the form of radiation is dissipated to the surroundings. The purpose of this project is to recover this waste heat. Surface radiation without participating media is considered in this study. Hence, copper coil is used to absorb the radiant heat and transfer it to water which run through the coil. This low temperature recovery water can be used for cooking or to keep the food hot packed or other similar low grade heat applications.

Energy Storage and Waste Heat Recovery: A Synergistic Effect Benefiting Renewable Energy

2011 ◽  
Author(s):  
Richard B. Peterson ◽  
Robbie Ingram-Goble ◽  
Kevin J. Harada ◽  
Hailei Wang
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Heat Pump ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Heat Engine ◽  
Low Grade ◽  
Round Trip ◽  
Low Grade Heat

In order for renewable energy to displace 20% or more of the conventional power generating base without depending on significant hot spinning reserves, reliable and cost effective energy storage will be needed at the utility scale. Developing and deploying practical energy storage at this level is a major challenge and no single technology appears to have a dominant position. Storing electrical energy by way of thermal storage at moderate-to-low temperatures has not received much attention in the past. In fact, the conventional thinking is that heat pump/heat engine mediated energy storage is too inefficient (round trip efficiency of 30% or lower) to be practical. However, an innovative and efficient storage approach is proposed in this paper by incorporating sensible heat storage in a Rankine-type heat pump/heat engine cycle to increase the round trip efficiency. Furthermore, by using a source of waste (or otherwise low-grade) heat, round trip efficiencies can be enhanced further. Currently, there appears to be no significant linkage between waste heat recovery and grid-level energy storage, although the market opportunity for each is considerable. Using the thermal approach described here, a system can be created that uses very low-grade heat in the range between 50 to 70 °C. Furthermore, conventional technology can be used to implement the system where no extreme conditions are present anywhere in the cycle. Hence, it is thought to have advantages over other energy storage concepts being developed.

scholarly journals Exceptional thermoelectric performance in Mg3Sb0.6Bi1.4 for low-grade waste heat recovery

2019 ◽  
Vol 12 (3) ◽  
pp. 965-971 ◽  
Author(s):  
Kazuki Imasato ◽  
Stephen Dongmin Kang ◽  
G. Jeffrey Snyder
Keyword(s):  
Conversion Efficiency ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Thermoelectric Performance ◽  
Type Material ◽  
Low Grade ◽  
Thermoelectric Conversion

An n-type material with intrinsically higher thermoelectric conversion efficiency than Bi2Te3 in the low-grade waste-heat range has finally been developed.

Near-Field Thermophotonic Systems for Low-Grade Waste-Heat Recovery

Nano Letters ◽  
2018 ◽  
Vol 18 (8) ◽  
pp. 5224-5230 ◽  
Author(s):  
Bo Zhao ◽  
Parthiban Santhanam ◽  
Kaifeng Chen ◽  
Siddharth Buddhiraju ◽  
Shanhui Fan
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Near Field ◽  
Low Grade

A bimetallic thermally-regenerative ammonia-based flow battery for low-grade waste heat recovery

2019 ◽  
Vol 424 ◽  
pp. 184-192 ◽  
Author(s):  
Weiguang Wang ◽  
Gequn Shu ◽  
Hua Tian ◽  
Dongxing Huo ◽  
Xiuping Zhu
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Low Grade ◽  
Flow Battery
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