Direct Conversion of Waste Heat to Electricity Using Pyroelectric Conversion

Yu, Jian; Ikura, M

doi:10.2316/journal.203.2007.4.203-3789

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…89 The potential of 'thermo-dielectric' generation has been considered for over 50 years 4,6,9,94 and the initial history of this work is well described by Khodayari et al 3 Olsen proposed a working pyroelectric cycle between two different polarization curves obtained at two distinct temperatures for a material. This type of pyroelectric converter is an electric form of heat engine and Olsen et al presented a number of important papers and patents on thermal cycles for harvesting; 83,84,89,[96][97][98][99][100][101] it has also been examined in detail by a number of researchers. 38,54,68,71,82,85,[102][103][104][105][106][107][108][109] The role of the secondary pyroelectric and phase transitions on such cycles has been well reported by McKinley et al 54 Olsen introduced a clockwise harvesting cycle dening electrical work N D as the area between two isotherms in an electric displacement -eld (D-E) diagram which is shown in Fig.…”

Section: Olsen Cyclementioning

confidence: 99%

Pyroelectric materials and devices for energy harvesting applications

Bowen

Taylor

LeBoulbar

et al. 2014

Energy Environ. Sci.

706

539

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This review covers energy harvesting technologies associated with pyroelectric materials and systems. Such materials have the potential to generate electrical power from thermal fluctuations and is a less well explored form of thermal energy harvesting than thermoelectric systems. The pyroelectric effect and potential thermal and electric field cycles for energy harvesting are explored. Materials of interest are discussed and pyroelectric architectures and systems that can be employed to improve device performance, such as frequency and power level, are described. In addition to the solid materials employed, the appropriate pyroelectric harvesting circuits to condition and store the electrical power are discussed.

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Section: Olsen Cyclementioning

confidence: 99%

Pyroelectric materials and devices for energy harvesting applications

Bowen

Taylor

LeBoulbar

et al. 2014

Energy Environ. Sci.

706

539

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“…The earliest known publication on the recovery and utilisation of lowgrade waste heat (RU/LGWH) was published on 25 th August 1976. The conference paper titled "Ammonia absorption refrigeration process for low-grade waste heat recovery" by Cockshott (1976) (Anon 1980, Cheng &Rovang 1987, Cockshott 1976, Lightfoot 1983, Yu &Ikura 2004 during the 32 years. This observation could be partly explained by the theories of technological innovation described in Dosi (1982) and the protracted growth of technologies highlighted in Pakko (2002).…”

Section: Publication and Citation Trendsmentioning

confidence: 99%

Low-Grade Waste Heat Recovery and Utilisation: A Bibliometric Analysis and Literature Review

Nyakuma

2024

Preprint

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This study examines the research landscape on the recovery and utilisation of low-grade waste heat (RU/LGWH) through bibliometric analysis and literature review based on publications indexed in Scopus from 2008 to 2022. During this period, a total of 135 publications and 4,759 citations were recorded in RU/LGWH research. Publications trends showed that high publication rates and scientific interest in the topic were largely occasioned by efforts to achieve humanity’s quest for cleaner sources of energy and net zero emissions. The most prolific researchers, affiliations and nations are Sheng Yang, Central South University and China, respectively. The observed dominance of Chinese-based researchers and institutions is ascribed to research funding available from funding organisations/programmes such as the National Natural Science Foundation, among others, that account for 6 out of the top 10 funders of RU/LGWH research. High rates of collaboration between countries (RC = 69.23%) compared to authors (RC = 54.05%) were observed during social network analysis. Hotspots analysis revealed that RU/LGWH research has been majorly focused on three core areas: Energy Recovery and Management (ERM), Economics and Efficiency Assessment (EEA), and Exergy and Performance Analysis (EPA). As such, the various stakeholders have devoted significant resources to exploring and exploiting the technological feasibility, economic viability, and thermodynamic performance of LGWH. Despite the enormous progress recorded, selected grey areas still exist, and we opine the prospects of the field greatly lie in finding solutions to these research gaps.

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“…The offset was attributed to leakage current across the PlZT ceramic often observed at high temperatures and/or large electric fields [15], [26], [38], [55]. additionally, the change in electric displacement was negligibly small in isoelectric cooling process 4′-1 from T cold = 23°c and T hot = 140°c, indicating that this process can be performed on 9.5/65/35 PlZT nearly instantaneously.…”

Section: A Isothermal D-e Loops and Olsen Cyclementioning

confidence: 99%

“…7 also shows that the D-E paths of the olsen cycles were not closed because points 4 and 4′ did not coincide. This indicates that leakage current was observed across the PlZT ceramic at high temperatures and/or large electric fields [15], [26], [38], [55].…”

Section: F Effect Of Cycle Frequency Fmentioning

confidence: 99%

Direct thermal to electrical energy conversion using 9.5/65/35 PLZT ceramics in the ergodic relaxor phase

Chin

Lee

McKinley

et al. 2012

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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This paper reports on direct thermal to electrical energy conversion by performing the Olsen cycle on 9.5/65/35 lead lanthanum zirconate titanate (PLZT). The Olsen cycle consists of two isothermal and two isoelectric field processes in the electric displacement versus electric field diagram. It was performed by alternatively dipping the material in hot and cold dielectric fluid baths under specified electric fields. The effects of applied electric field, sample thickness, electrode material, operating temperature, and cycle frequency on the energy and power densities were investigated. A maximum energy density of 637 ± 20 J/L/cycle was achieved at 0.054 Hz with a 250-μm-thick sample featuring Pt electrodes and coated with a silicone conformal coating. The operating temperatures varied between 3°C and 140°C and the electric field was cycled between 0.2 and 6.0 MV/m. A maximum power density of 55 ± 8 W/L was obtained at 0.125 Hz under the same operating temperatures and electric fields. The dielectric strength of the material, and therefore the energy and power densities generated, increased when the sample thickness decreased from 500 to 250 μm. Furthermore, the electrode material was found to have no significant effect on the energy and power densities for samples subject to the same operating temperatures and electric fields. However, samples with electrode material possessing thermal expansion coefficients similar to that of PLZT were capable of withstanding larger temperature swings. Finally, a fatigue test showed that the power generation gradually degraded when the sample was subject to repeated thermoelectrical loading.

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Direct Conversion of Waste Heat to Electricity Using Pyroelectric Conversion

Cited by 3 publications

References 5 publications

Pyroelectric materials and devices for energy harvesting applications

Pyroelectric materials and devices for energy harvesting applications

Low-Grade Waste Heat Recovery and Utilisation: A Bibliometric Analysis and Literature Review

Direct thermal to electrical energy conversion using 9.5/65/35 PLZT ceramics in the ergodic relaxor phase

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