Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length
Thermoelectric coolers (TECs) can reach temperatures below that obtained with a steady-state current by applying an electrical current pulse which enables a transitory state in a Peltier device. This effect is known as supercooling. In this paper, we study characteristics parameters, such as the min...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-02-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/21/3/226 |
| _version_ | 1811278029396115456 |
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| author | Pablo Eduardo Ruiz-Ortega Miguel Angel Olivares-Robles |
| author_facet | Pablo Eduardo Ruiz-Ortega Miguel Angel Olivares-Robles |
| author_sort | Pablo Eduardo Ruiz-Ortega |
| collection | DOAJ |
| description | Thermoelectric coolers (TECs) can reach temperatures below that obtained with a steady-state current by applying an electrical current pulse which enables a transitory state in a Peltier device. This effect is known as supercooling. In this paper, we study characteristics parameters, such as the minimum cooling temperature and spatial temperature profile, in a TEC operated under current pulses and a cooling load <inline-formula> <math display="inline"> <semantics> <mrow> <mo>(</mo> <msub> <mi>Q</mi> <mi>c</mi> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula>. Numerical analysis for a one-dimensional thermoelectric model of the cooling system is developed, and a novel MATLAB programming code is proposed for the transient state based on finite element analysis. We also investigate the influence of the thermoelement’s length upon the cooling mechanism. A new parameter called the “characteristic cooling length„ is proposed to describe the length in which the minimum cooling temperature occurs along the elements of a TEM. Results show the transient temperature profiles along the elements of the semiconductor P-type element, and a “characteristic cooling length„ is characterized. We also propose a general principle, and the lowest cooling temperature values are obtained for a semiconductor’s small length and variable pulse cooling load under current pulse operation. The present study will serve as guidance for the geometric design of TECs under current pulse operations. |
| first_indexed | 2024-04-13T00:28:29Z |
| format | Article |
| id | doaj.art-fc3fa41ead57488990f72284e3c04a42 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-13T00:28:29Z |
| publishDate | 2019-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-fc3fa41ead57488990f72284e3c04a422022-12-22T03:10:33ZengMDPI AGEntropy1099-43002019-02-0121322610.3390/e21030226e21030226Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling LengthPablo Eduardo Ruiz-Ortega0Miguel Angel Olivares-Robles1Instituto Politecnico Nacional, Depto. Ingenieria Bioquimica, ENCB, Ciudad de Mexico 07738, MexicoInstituto Politecnico Nacional, SEPI ESIME Culhuacan, Ciudad de Mexico 04430, MexicoThermoelectric coolers (TECs) can reach temperatures below that obtained with a steady-state current by applying an electrical current pulse which enables a transitory state in a Peltier device. This effect is known as supercooling. In this paper, we study characteristics parameters, such as the minimum cooling temperature and spatial temperature profile, in a TEC operated under current pulses and a cooling load <inline-formula> <math display="inline"> <semantics> <mrow> <mo>(</mo> <msub> <mi>Q</mi> <mi>c</mi> </msub> <mo>)</mo> </mrow> </semantics> </math> </inline-formula>. Numerical analysis for a one-dimensional thermoelectric model of the cooling system is developed, and a novel MATLAB programming code is proposed for the transient state based on finite element analysis. We also investigate the influence of the thermoelement’s length upon the cooling mechanism. A new parameter called the “characteristic cooling length„ is proposed to describe the length in which the minimum cooling temperature occurs along the elements of a TEM. Results show the transient temperature profiles along the elements of the semiconductor P-type element, and a “characteristic cooling length„ is characterized. We also propose a general principle, and the lowest cooling temperature values are obtained for a semiconductor’s small length and variable pulse cooling load under current pulse operation. The present study will serve as guidance for the geometric design of TECs under current pulse operations.https://www.mdpi.com/1099-4300/21/3/226supercoolingthermoelectricPeltierpulse currenttransitory |
| spellingShingle | Pablo Eduardo Ruiz-Ortega Miguel Angel Olivares-Robles Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length Entropy supercooling thermoelectric Peltier pulse current transitory |
| title | Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length |
| title_full | Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length |
| title_fullStr | Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length |
| title_full_unstemmed | Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length |
| title_short | Peltier Supercooling in Transient Thermoelectrics: Spatial Temperature Profile and Characteristic Cooling Length |
| title_sort | peltier supercooling in transient thermoelectrics spatial temperature profile and characteristic cooling length |
| topic | supercooling thermoelectric Peltier pulse current transitory |
| url | https://www.mdpi.com/1099-4300/21/3/226 |
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