Üç Ayrik Ölçüme Dayali Parabol Algori̇tmasi İle Termoelektri̇k Modülün Imax, Vmax Ve Emax Parametreleri̇ni̇n Beli̇rlenmesi̇

Ahiska, Raşit Ahiska; Dişlitaş, Serkan

doi:10.17341/gazimmfd.278461

Cited by 3 publications

(3 citation statements)

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“…It was predicted that there would be a difference of around 0.5° between the Bragg locations of the n-type and p-type materials that were produced. This scenario agrees with findings from earlier research [15,16,17]. Based on using the well-known Debye-Scherrer equation (D=(kλ/β.cosθ)) depicted in Figure 3b, we may infer the crystallite size and the lattice strain generated by the milling operation.…”

Section: Resultssupporting

confidence: 91%

“…Equation 1 reveals that decreasing heat conductivity is an excellent strategy. However, other strategies have been developed to boost thermoelectric efficiency, including expanding the Seebeck coefficient by electronic band topologies and band changes [8] and decreasing thermal conductivity via nano-induced-configuration as thin films and/or ball-milled [9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Reclaim of Wrecked Bi-Te Based Materials In Peltier Modules In Thermopower Properties By Mechanical Milling

Mehmet

Yüzüak

2023

Cumhuriyet Science Journal

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We thoroughly evaluated the effects of various treatments on the structural and electrical properties of the two as-cast materials, “Sb-doping Bi-Te (p-type)” and “Se-doping Bi-Te (n-type)” which are frequently present in abandoned Peltier modules. To investigate the thermoelectric properties of Bi2Te3-based materials, waste alloys characterized by electrical conductivity using the hot-end method. Alloys were purified by performing arc melting on a water-cooled copper crucible in a vacuum of at least 10-3 mbar, with five times melting sessions to assure homogeneity. A single and long milling period of 144 hours is applied. After the compressing operation, the resulting discs with nanostructures were annealed for an hour at 600 K under vacuum conditions. The discs' structural properties were characterized using X-ray diffraction (XRD) and their surfaces and stoichiometries were determined using scanning electron microscopy with an energy dispersive feature. The Seebeck coefficient of the nanoparticle formed n-type Bi-Te based sample is -35.3 µV.K-1 and p-type Bi-Te based sample is 100 µV.K-1 (15% of mean error margin). It was found that a notable improvement was attained in comparison to the initial state with the addition of nanoparticles.We thoroughly evaluated the effects of various treatments on the structural and electrical properties of the two as-cast materials, “Sb-doping Bi-Te (p-type)” and “Se-doping Bi-Te (n-type)”, which are frequently present in abandoned Peltier modules. To investigate the thermoelectric properties of Bi2Te3-based materials, waste alloys were produced and separated by electrical conductivity using the hot-end method. The alloys were purified by performing arc melting on a water-cooled copper crucible in a vacuum of at least 10-3 mbar, with 5 times melting sessions to assure homogeneity. A ball-milled procedure was used to reduce the obtained mass-scale materials to nano sizes. Single and long milling period of 144 hours is applied. After the compressing operation, the resulting discs with nano-structures were annealed for an hour at 600 K in a vacuum. X-ray diffraction was used to characterize the discs' structures, while scanning electron microscopy and energy dispersive X-ray spectroscopy were used to examine the discs' surfaces and determine their morphologies. Based on thermal imaging camera scans and Si-diode, we know that the Seebeck coefficient of the nanoparticle formed n-type Bi-Te based sample is -35.37 V.K-1, while that of the nanoparticle formed p-type Bi-Te based sample is 100.05 V.K-1 (15% of mean error margin). It was found that a notable improvement was attained in comparison to the initial state with the addition of nanoparticles.

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Section: Resultssupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Reclaim of Wrecked Bi-Te Based Materials In Peltier Modules In Thermopower Properties By Mechanical Milling

Mehmet

Yüzüak

2023

Cumhuriyet Science Journal

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“…Böylece kitin iç sıcaklık kontrolünü analog sensörle ve dijital yöntemle olmak üzere iki farklı yöntemle yapabilen devre oluşturulmuş ve elde edilen kontrol sonuçlarını karşılaştırmışlar. Karşılaştırma sonucuna göre dijital sıcaklık sensörü ile oluşturulmuş devrenin yapmış olduğu soğutma ve ısıtma işleminde daha fazla enerji tasarrufu sağlandığı ve dijital sıcaklık sensörünün kalibrasyon probleminin olmadığı gözlemlemişlerdir [11].…”

Section: Introductionunclassified

Filtre Yazılımları Kullanılarak Sıcaklık Değerlerinin Iot Tabanlı Sistemde Gösterilmesi

ÜNLÜ¹,

Bütüner²,

KÜÇÜKKARA³

2022

Teknik Bilimler Dergisi

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ÖzFiltre yazılımları ses, görüntü ve verilerdeki gürültüyü azaltmak veya bastırmak amacıyla kullanılır. Bu yazılımlar ile anlamlı sonuçlar çıkarılması amacıyla istenmeyen değerler çıkışa verilmemektedir. Böylelikle, herhangi bir problem için kurulan mekatronik sistemin, filtre yazılımları uygulanarak optimize edilmiş şekilde çalışması sağlanacaktır. Bu çalışmada sıcaklık sensörü kullanılarak gerçek zamanlı sistem tasarımı gerçekleştirilmiştir. IoT tabanlı oluşturulan sistemde 3 farklı filtre yazılımı uygulanarak sırası ile ham sıcaklık değerleri ile karşılaştırma yapılmıştır.. Median, ortalamalar ve kalman filtreleri kullanılmıştır. Grafiksel olarak bu filtre yazılımlarının karşılaştırılması gerçekleştirilmiştir. Çalışma ile bir mekatronik sistemin filtre yazılımları sayesinde daha verimli çalışması sağlanmıştır.

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Design of Image Processing-based System for Detection of Heat Transfer Direction in Thermoelectric Modules

Dişlitaş,

Altıok,

Güngör

2024

Hittite Journal of Science and Engineering

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It is extremely important for the performance and success of the system to know the cooling or heating surfaces of the thermoelectric modules (TEMs) as cooler or generator, according to the heat transfer direction, and to carry out their installation correctly, taking this into account. In TEMs, the direction of heat transfer between surfaces changes depending on the applied DC direction, and while one surface of the module cools, the other heats up. In this respect, the state of the positive and negative poles in the design and production of TEMs directly affects the heat transfer direction between the module surfaces. On the other hand, the contact direction of the surfaces of the TEMs used in a designed thermoelectric system (TES) is of great importance in order to perform the heat transfer correctly without loss of performance. In this study, a system is designed to detect the heat transfer direction of TEMs using image processing techniques. The basic principle of the system is to determine the positive and negative poles of the TEMs together with the ceramic plate, using the color-based image processing method, and to determine the heat transfer direction by utilizing their relative positions. With the designed system, the heat transfer direction of TEMs at different illuminance levels is tried to be determined and successful results were obtained. As a result, it is thought that the developed system will contribute to the automatic error control for the production and assembly of TEMs.

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Üç Ayrik Ölçüme Dayali Parabol Algori̇tmasi İle Termoelektri̇k Modülün Imax, Vmax Ve Emax Parametreleri̇ni̇n Beli̇rlenmesi̇

Cited by 3 publications

References 0 publications

Reclaim of Wrecked Bi-Te Based Materials In Peltier Modules In Thermopower Properties By Mechanical Milling

Reclaim of Wrecked Bi-Te Based Materials In Peltier Modules In Thermopower Properties By Mechanical Milling

Filtre Yazılımları Kullanılarak Sıcaklık Değerlerinin Iot Tabanlı Sistemde Gösterilmesi

Design of Image Processing-based System for Detection of Heat Transfer Direction in Thermoelectric Modules

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