Detail publikace

Energy Harvesting Using Thermocouple and Compressed Air

BAYER, R. MAXA, J. ŠABACKÁ, P.

Originální název

Energy Harvesting Using Thermocouple and Compressed Air

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Peltier-Seebeck effect; Laval nozzle; harvester thermocouple; conical shockwave; perpendicular; detached shockwave; energy harvesting

Autoři

BAYER, R.; MAXA, J.; ŠABACKÁ, P.

Vydáno

9. 9. 2021

Nakladatel

MDPI

Místo

BASEL

ISSN

1424-8220

Periodikum

SENSORS

Ročník

21

Číslo

18

Stát

Švýcarská konfederace

Strany od

1

Strany do

15

Strany počet

14

URL

https://www.mdpi.com/1424-8220/21/18/6031

Plný text v Digitální knihovně

http://hdl.handle.net/11012/201675

BibTex

@article{BUT172563,
  author="Robert {Bayer} and Jiří {Maxa} and Pavla {Šabacká}",
  title="Energy Harvesting Using Thermocouple and Compressed Air",
  journal="SENSORS",
  year="2021",
  volume="21",
  number="18",
  pages="1--15",
  doi="10.3390/s21186031",
  issn="1424-8220",
  url="https://www.mdpi.com/1424-8220/21/18/6031"
}