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. 2018 May 8;9:1827. doi: 10.1038/s41467-018-04027-9

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — EC prototype without and with energy recovery. a Device schematic with EC plates 12C1 and 12C2, each based on 12 MLCs. Data are presented (b, c) without energy recovery and (d, e) with energy recovery. b, d In a given half cycle, each plate (whose temperature is given by the green or purple data) underwent rapid adiabatic EC cooling before slowly absorbing heat from the load, whose temperature T_c (orange data) fell by 0.26 K with respect to starting temperature T_h on reaching the steady state around 250 s after start-up at time t = 40 s. c, e For each half cycle, we show the heat Q absorbed by the cold plate from the load, and the work W done to charge the other plate back to 70 V at the sink (where it thus dumps heat)