Energy harvesting using thermocouple and compressed air
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F21%3A00549310" target="_blank" >RIV/68081731:_____/21:00549310 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26220/21:PU141644
Result on the web
<a href="https://www.mdpi.com/1424-8220/21/18/6031" target="_blank" >https://www.mdpi.com/1424-8220/21/18/6031</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/s21186031" target="_blank" >10.3390/s21186031</a>
Alternative languages
Result language
angličtina
Original language name
Energy harvesting using thermocouple and compressed air
Original language description
In this paper, we describe the possibility of using the energy of a compressed air flow, where cryogenic temperatures are achieved within the flow behind the nozzle, when reaching a critical flow in order to maximize the energy gained. Compared to the energy of compressed air, the energy obtained thermoelectrically is negligible, but not zero. We are therefore primarily aiming to maximize the use of available energy sources. Behind the aperture separating regions with a pressure difference of several atmospheres, a supersonic flow with a large temperature drop develops. Based on the Seebeck effect, a thermocouple is placed in these low temperatures to create a thermoelectric voltage. This paper contains a mathematical-physical analysis for proper nozzle design, controlled gas expansion and ideal placement of a thermocouple within the flow for best utilization of the low temperature before a shockwave formation. If the gas flow passes through a perpendicular shockwave, the velocity drops sharply and the gas pressure rises, thereby increasing the temperature. In contrast, with a conical shockwave, such dramatic changes do not occur and the cooling effect is not impaired. This article also contains analyses for proper forming of the head shape of the thermocouple to avoid the formation of a detached shockwave, which causes temperature stagnation resulting in lower thermocouple cooling efficiency.
Czech name
—
Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20303 - Thermodynamics
Result continuities
Project
<a href="/en/project/GA19-03909S" target="_blank" >GA19-03909S: Advanced simulations of electron-gas interactions for high-efficiency detection of secondary electrons under dynamic in-situ experiments in ESEM.</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Sensors
ISSN
1424-8220
e-ISSN
1424-8220
Volume of the periodical
21
Issue of the periodical within the volume
18
Country of publishing house
CH - SWITZERLAND
Number of pages
14
Pages from-to
6031
UT code for WoS article
000701541100001
EID of the result in the Scopus database
2-s2.0-85115000453