Response to “ Comment on ‘ Effective thermal conductivity in thermoelectric materials ’ ”
نویسندگان
چکیده
Articles you may be interested in Comment on " Effective thermal conductivity in thermoelectric materials " [J. Response to " Comment on 'Optimization of power and efficiency of thermoelectric devices with asymmetric thermal contacts' " [J. Erratum: " High efficiency semimetal/semiconductor nanocomposite thermoelectric materials " [J. Response to " Comment on 'A new approach to optimum design in thermoelectric cooling systems' " [J. Appl. Response to " Comment on 'Effective thermal conductivity in thermoelectric materials' " [J. It is commonly claimed that achieving maximum power from a thermoelectric generator necessitates electrical load matching conditions instead of the operating condition derived for maximum generator efficiency. Here, we explain why the electrical load matching claim for maximum power in a design optimization is flawed and show that the load condition derived for maximum efficiency always produces more power. Finally, we consider a CPM generator, and prove that the electrical condition for maximum efficiency is indeed the electrical condition for maximum power, maximum power density, maximum power/cost of thermoelectric material, and maximum power/weight of thermoelectric material, when the leg length of the thermoelectric generator is a design variable.
منابع مشابه
بهبود بازده تبدیل انرژی حالت جامد با استفاده از نانوساختارهای ترموالکتریک
Solid-state energy conversion technologies such as thermoelectric refrigeration and power generation require materials with low thermal conductivity yet high electrical conductivity and Seebeck coefficiency. Although semiconductors are the best thermoelectric materials, they rarely have the such features. Nanostructures such as superlattices, quantum wires, and quantum dots provide novel method...
متن کاملEffective thermal conductivity in thermoelectric materials
Thermoelectric generators (TEGs) are solid state heat engines that generate electricity from a temperature gradient. Optimizing these devices for maximum power production can be difficult due to the many heat transport mechanisms occurring simultaneously within the TEG. In this paper, we develop a model for heat transport in thermoelectric materials in which an " effective thermal conductivity ...
متن کاملLow Sound Velocity Contributing to the High Thermoelectric Performance of Ag8SnSe6
Conventional strategies for advancing thermoelectrics by minimizing the lattice thermal conductivity focus on phonon scattering for a short mean free path. Here, a design of slow phonon propagation as an effective approach for high-performance thermoelectrics is shown. Taking Ag8SnSe6 as an example, which shows one of the lowest sound velocities among known thermoelectric semiconductors, the la...
متن کاملThermoelectric Properties of Highly-Crystallized Ge-Te-Se Glasses Doped with Cu/Bi
Chalcogenide semiconducting systems are of growing interest for mid-temperature range (~500 K) thermoelectric applications. In this work, Ge20Te77Se₃ glasses were intentionally crystallized by doping with Cu and Bi. These effectively-crystallized materials of composition (Ge20Te77Se₃)100-xMx (M = Cu or Bi; x = 5, 10, 15), obtained by vacuum-melting and quenching techniques, were found to have m...
متن کاملPhotoacoustic Measurement of Bandgaps of Thermoelectric Materials
Thermoelectric materials are a promising class of direct energy conversion materials, usually consisting of highly doped semiconductors. The key to maximizing their thermal to electrical energy conversion lies in optimizing three inter-related material properties, thermal conductivity, electrical conductivity, and Seebeck coefficient. All three properties are affected by the carrier concentrati...
متن کامل