Invention of Low Cost Thermoelectric Generators

Phaga, P.; Vora–ud, Athorn; Seetawan, Tosawat

doi:10.1016/j.proeng.2012.02.053

Cited by 19 publications

(10 citation statements)

References 1 publication

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“…Urata et al 17 reported as much as 42.5 mW cm –2 for a doped system with a T hot of about 900 °C and a gradient as high as 565 K, while undoped CCO–CMO systems at lower temperature and gradients of 200 K yielded merely 3.3 mW cm –2 (Phaga et al 16 ) and 23.7 × 10 –3 mW cm –2 (Seetawan et al 15 ).…”

Section: Discussionmentioning

confidence: 99%

All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect

et al. 2018

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All-oxide thermoelectric modules for energy harvesting are attractive because of high-temperature stability, low cost, and the potential to use nonscarce and nontoxic elements. Thermoelectric modules are mostly fabricated in the conventional π-design, associated with the challenge of unstable metallic interconnects at high temperature. Here, we report on a novel approach for fabrication of a thermoelectric module with an in situ formed p–p–n junction made of state-of-the-art oxides Ca 3 Co 4– x O 9+δ (p-type) and CaMnO 3 –CaMn 2 O 4 composite (n-type). The module was fabricated by spark plasma co-sintering of p- and n-type powders partly separated by insulating LaAlO 3 . Where the n- and p-type materials originally were in contact, a layer of p-type Ca 3 CoMnO 6 was formed in situ. The hence formed p–p–n junction exhibited Ohmic behavior and a transverse thermoelectric effect, boosting the open-circuit voltage of the module. The performance of the module was characterized at 700–900 °C, with the highest power output of 5.7 mW (around 23 mW/cm 2 ) at 900 °C and a temperature difference of 160 K. The thermoelectric properties of the p- and n-type materials were measured in the temperature range 100–900 °C, where the highest zT of 0.39 and 0.05 were obtained at 700 and 800 °C, respectively, for Ca 3 Co 4– x O 9+δ and the CaMnO 3 –CaMn 2 O 4 composite.

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Section: Discussionmentioning

confidence: 99%

All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect

et al. 2018

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“…TE cihazları kayıp durumundaki bu atık ısı enerjisini doğrudan elektrik enerjisine dönüştürebilmektedir [14][15][16][17]. N-tipi oksit yarıiletken CaMnO 3 malzemelerin, geleneksel TE malzemelerinin sahip olduğu yüksek Seebeck katsayısı, düşük elektriksel direnç ve toplam termal iletkenlik özelliklerine [5,13,15,[18][19][20] sahip olmasının yanında, çevreye duyarlı (toksik değil), yüksek termal kararlılık, hammaddelerin ucuzluğu ve kolay imalatı gibi olağanüstü avantajlara sahip olması TE malzemeler olarak kullanımını desteklemektedir [5,[12][13][14][15][16]21].…”

Section: Igi̇ri̇şunclassified

Kobalt Katkılı Kalsiyum Manganez Oksit Numunelerin Sentez ve Karakterizasyonu

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2020

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, kobalt katkılı kalsiyum manganez oksit numunelerinin faz bileşimleri, kristal yapıları, yüzey morfolojileri ve termal özellikleri karakterize edildi. Co miktarının bu oksit yapı üzerindeki etkileri belirlendi. Xışını kırınımı (XRD) sonuçları, kalsiyum manganez oksit fazlarının oluşumuna işaret etmektedir. Fourier dönüşümlü kızılötesi (FTIR) analizleri, her bir numune için peroksit yapısının oluşumunu doğrulamaktadır. Termal analiz sonuçları, üretilen numunelerin termal olarak kararlı olduklarını göstermektedir. Numunelerin taramalı elektron mikroskobu (SEM) gözlemleri ve enerji dağılımlı X-ışını (EDX) analizleri, Co katkısının morfolojiye etki ettiğini ve kalsiyum manganez oksit yapıya nüfuz ettiğini desteklemektedir.

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“…Less toxic inorganic oxides are promising for the thermoelectric energy conversion from waste heat. A number of studies are devoted to this materials, see, e.g., [57,58,59,60,61,62]. Although the thermoelectric performance of oxide-based materials is not as good as tellurides and antimonides alloys, they have better stability and lower negative environmental impact [41].…”

Section: Review Of Inorganic Thermoelectric Materials For Waste Hementioning

confidence: 99%

A Review on Electroactive Polymers for Waste Heat Recovery

Kolasińska

Kolasiński

2016

Materials

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This paper reviews materials for thermoelectric waste heat recovery, and discusses selected industrial and distributed waste heat sources as well as recovery methods that are currently applied. Thermoelectric properties, especially electrical conductivity, thermopower, thermal conductivity and the thermoelectric figures of merit, are considered when evaluating thermoelectric materials for waste heat recovery. Alloys and oxides are briefly discussed as materials suitable for medium- and high-grade sources. Electroactive polymers are presented as a new group of materials for low-grade sources. Polyaniline is a particularly fitting polymer for these purposes. We also discuss types of modifiers and modification methods, and their influence on the thermoelectric performance of this class of polymers.

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Invention of Low Cost Thermoelectric Generators

Cited by 19 publications

References 1 publication

All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect

All-Oxide Thermoelectric Module with in Situ Formed Non-Rectifying Complex p–p–n Junction and Transverse Thermoelectric Effect

Kobalt Katkılı Kalsiyum Manganez Oksit Numunelerin Sentez ve Karakterizasyonu

A Review on Electroactive Polymers for Waste Heat Recovery

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