Energy scavenging from ultra-low temperature gradients

Ravi Anant Kishore, Brenton Davis, Jake Greathouse, Austin Hannon, David Emery Kennedy, Alec Millar, Daniel Mittel, Amin Nozariasbmarz, Min-Gyu Kang, Han Byul Kang, Mohan Sanghadasa, Shashank Priya

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thermal energy harvesting from natural resources and waste heat is becoming critical due to ever-increasing environmental concerns. However, so far, available thermal energy harvesting technologies have only been able to generate electricity from large temperature gradients. Here, we report a fundamental breakthrough in low-grade thermal energy harvesting and demonstrate a device based on the thermomagnetic effect that uses ambient conditions as the heat sink and operates from a heat source at temperatures as low as 24 °C. This concept can convert temperature gradients as low as 2 °C into electricity while operating near room temperature. The device is found to exhibit a power density (power per unit volume of active material) of 105 μW cm-3 at a temperature difference of 2 °C, which increases to 465 μW cm-3 at a temperature difference of 10 °C. The power density increases by 2.5 times in the presence of wind with a speed of 2.0 m s-1. This advancement in thermal energy harvesting technology will have a transformative effect on renewable energy generation and in reducing global warming.

Original languageEnglish (US)
Pages (from-to)1008-1018
Number of pages11
JournalEnergy and Environmental Science
Volume12
Issue number3
DOIs
StatePublished - Mar 1 2019

Fingerprint

Energy harvesting
Scavenging
Thermal energy
Thermal gradients
temperature gradient
energy
Electricity
electricity
Temperature
temperature
Waste heat
Heat sinks
Global warming
Natural resources
heat source
global warming
natural resource
effect

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

Cite this

Kishore, R. A., Davis, B., Greathouse, J., Hannon, A., Emery Kennedy, D., Millar, A., ... Priya, S. (2019). Energy scavenging from ultra-low temperature gradients. Energy and Environmental Science, 12(3), 1008-1018. https://doi.org/10.1039/c8ee03084g
Kishore, Ravi Anant ; Davis, Brenton ; Greathouse, Jake ; Hannon, Austin ; Emery Kennedy, David ; Millar, Alec ; Mittel, Daniel ; Nozariasbmarz, Amin ; Kang, Min-Gyu ; Kang, Han Byul ; Sanghadasa, Mohan ; Priya, Shashank. / Energy scavenging from ultra-low temperature gradients. In: Energy and Environmental Science. 2019 ; Vol. 12, No. 3. pp. 1008-1018.
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Kishore, RA, Davis, B, Greathouse, J, Hannon, A, Emery Kennedy, D, Millar, A, Mittel, D, Nozariasbmarz, A, Kang, M-G, Kang, HB, Sanghadasa, M & Priya, S 2019, 'Energy scavenging from ultra-low temperature gradients', Energy and Environmental Science, vol. 12, no. 3, pp. 1008-1018. https://doi.org/10.1039/c8ee03084g

Energy scavenging from ultra-low temperature gradients. / Kishore, Ravi Anant; Davis, Brenton; Greathouse, Jake; Hannon, Austin; Emery Kennedy, David; Millar, Alec; Mittel, Daniel; Nozariasbmarz, Amin; Kang, Min-Gyu; Kang, Han Byul; Sanghadasa, Mohan; Priya, Shashank.

In: Energy and Environmental Science, Vol. 12, No. 3, 01.03.2019, p. 1008-1018.

Research output: Contribution to journalArticle

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AU - Mittel, Daniel

AU - Nozariasbmarz, Amin

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AU - Kang, Han Byul

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AU - Priya, Shashank

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Kishore RA, Davis B, Greathouse J, Hannon A, Emery Kennedy D, Millar A et al. Energy scavenging from ultra-low temperature gradients. Energy and Environmental Science. 2019 Mar 1;12(3):1008-1018. https://doi.org/10.1039/c8ee03084g