High-Efficiency Solid State Heat Pump Module

Annapragada, S. Ravi; Verma, Parmesh; Sur, Aritra; Xie, Wei

doi:10.2172/1456857

Cited by 8 publications

(9 citation statements)

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“…A recent prototype developed by the UTRC, operating an AER via the fluid-solid heat exchange as well, impressively demonstrated a 14 C temperature span at room temperature (see Figure 8B). 64 However, the report does not reveal which EC material or how much the electric field was used.…”

Section: Ec Cooling Device Designs and Demonstrationsmentioning

confidence: 99%

“…55,62,63 Recently, the United Technologies Research Center (UTRC) has developed an EC system model indicating that the EC cooling system could achieve 25% enhancement of COP compared to that of the VCC. 64 In order to evaluate the material TEWI of different cooling agents (vapors, fluids, and solids), one can consider a device model, where different refrigerants are operating in, with a fixed temperature span of 10 K between the cold end and the hot end, near the room temperature. The materials participated in the evaluation all exhibit temperature change DT > 10 K. The active regeneration process is not considered in the model to eliminate the involvement of the case-sensitive factors resulted from various device designs.…”

Section: Evaluating the Environmental Impact Of Ec Materialsmentioning

confidence: 99%

“…74,75 By combining the EC and TE effects, the device should 68 and (B) a maximum 14 K temperature span achieved in a gas-cooling EC device by UTRC. 64 (C and D) The EC device prototypes that operate AER via solid-solid heat exchange by Zhang et al, where (C) a 5 K temperature span has been achieved by polymeric cooling agents in an oscillatory operation, 69 and (D) a rotary EC device without external refrigeration layer. 71 (E and F) The EC prototype and design configuration utilizing the electroactive behavior of the materials, where (E) a flexible EC cooler can pump heat via electrostatic force-operated oscillation by Ma et al, 72 and (F) a multi-stage EC cooler utilized electrostrictive beam-bending of electroactive ceramics by Brade sko et al 73 Reprinted with permission from Plaznik et al, 68 Annapragada, 64 Gu et al, 69 Zhang et al, 71 Ma et al, 72 and Brade sko et al 73 Copyright 2015, 2013, and 2017 AIP, 2017 AAAS, and 2016 AIP, respectively.…”

Section: Ec Cooling Device Designs and Demonstrationsmentioning

confidence: 99%

“…Figure 8. Recently Reported Designs and Prototypes of EC Coolers(A and B) The EC device demonstrations that operate active electrocaloric regeneration (AER) via solid-fluid heat exchange, where (A) a device enabled a 3.4 K temperature span by utilizing stacked bulk ceramics and heat exchange fluid to flow them by Plaznik et al68 and (B) a maximum 14 K temperature span achieved in a gas-cooling EC device by UTRC 64. (C and D) The EC device prototypes that operate AER via solid-solid heat exchange by Zhang et al, where (C) a 5 K temperature span has been achieved by polymeric cooling agents in an oscillatory operation,69 and (D) a rotary EC device without external refrigeration layer 71.…”

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confidence: 99%

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Electrocaloric Cooling Materials and Devices for Zero-Global-Warming-Potential, High-Efficiency Refrigeration

Shi

Han

et al. 2019

Joule

307

156

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Electrocaloric cooling technologies, enabled by the discovery of the giant electrocaloric effect in dielectrics more than a decade ago, represents a zero-globalwarming-potential, environment-benign cooling alternative. Benefited from its nature as an electricity-driven capacitor, the electrocaloric working body renders the great advantages in the energy efficiency and the device integration. The decade-long efforts on advancing the technology revealed many promising material candidates with matured manufacturing protocols, as well as intriguing device prototypes for applications beyond the traditional vapor compression based cooling. This article presents the recent advances in electrocaloric cooling technologies, from material improvements to device demonstrations. The environmental impact and the energy efficiency of the technology were evaluated by the total effective warming impact and the material COP, respectively. In addition to the current progresses achieved by the decade-long research effort, the existing challenges and potential opportunities brought by the electrocaloric refrigeration will be discussed.

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Section: Ec Cooling Device Designs and Demonstrationsmentioning

confidence: 99%

Section: Evaluating the Environmental Impact Of Ec Materialsmentioning

confidence: 99%

Section: Ec Cooling Device Designs and Demonstrationsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Electrocaloric Cooling Materials and Devices for Zero-Global-Warming-Potential, High-Efficiency Refrigeration

Shi

Han

et al. 2019

Joule

307

156

View full text Add to dashboard Cite

show abstract

“…The highest temperature span of a polymer system reported in a peer-reviewed publication is 5 K (34). A temperature span up to 8.4°C of a polymer system was claimed in a government project report (39). However, the low thermal conductivity of polymers necessitates the use of thin films of not more than several tens of micrometers for adequate heat transfer for a practical heat pump [for example, (31)].…”

mentioning

confidence: 99%

A high-performance solid-state electrocaloric cooling system

Wang

Zhang

Usui

et al. 2020

Science

178

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Electrocaloric (EC) cooling is an emerging technology that has broad potential to disrupt conventional air conditioning and refrigeration as well as electronics cooling applications. EC coolers can be highly efficient, solid state, and compact; have few moving parts; and contain no environmentally harmful or combustible refrigerants. We report a scalable, high-performance system architecture, demonstrated in a device that uses PbSc0.5Ta0.5O3 EC multilayer ceramic capacitors fabricated in a manufacturing-compatible process. We obtained a system temperature span of 5.2°C and a maximum heat flux of 135 milliwatts per square centimeter. This measured heat flux is more than four times higher than other EC cooling demonstrations, and the temperature lift is among the highest for EC systems that use ceramic multilayer capacitors.

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Electrocaloric Coolers: A Review

Torelló

Defaÿ

2022

Adv Elect Materials

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Since the discovery of giant electrocaloric effects, researchers are intensively studying electrocaloric cooling as an alternative to vapor compression systems to develop more efficient heat pumps and mitigate climate change. Endorsed by its direct use of electricity, easy‐handling, and compact design, recent advancements in the performance of electrocaloric coolers have finally displayed temperatures comparable to similar competing technologies, and the topic has regained attention and interest. In this work, the design, performance, and working principles of all electrocaloric prototypes before the year 2021 are reviewed, and hints and guidelines are given for future works to bring the development of these devices one step closer to real applications.

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High-Efficiency Solid State Heat Pump Module

Cited by 8 publications

References 0 publications

Electrocaloric Cooling Materials and Devices for Zero-Global-Warming-Potential, High-Efficiency Refrigeration

Electrocaloric Cooling Materials and Devices for Zero-Global-Warming-Potential, High-Efficiency Refrigeration

A high-performance solid-state electrocaloric cooling system

Electrocaloric Coolers: A Review

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