Lightweight thermal energy recovery system based on shape memory alloys: a DOE ARPA-E initiative

Browne, Alan L.; Keefe, Andrew C.; Alexander, Paul W.; Mankame, Nilesh D.; Usoro, P. B.; Johnson, Nancy L.; Aase, Jan; Sarosi, Peter; McKnight, Geoffrey P.; Herrera, Guillermo A.; Churchill, Christopher B.; Shaw, John A.; Brown, Jeff

doi:10.1117/12.913275

Cited by 5 publications

(9 citation statements)

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“…Even seemingly minor considerations, such as the difficulty in joining Ni-Ti wires can hamper industrial applications. [12] The recent introduction of twisted and coiled polymer fibers (TCPs) [16] appear to provide a viable alternative to SMAs in heat engines, but no such investigations have been reported to date.…”

Section: Introductionmentioning

confidence: 99%

“…[ 11 ] The application of SMA heat engines has also recently focused on small, deployable systems for powering remote sensors. [ 12 ] In principle, the use of shape memory alloys (SMAs) in heat engines for electricity generation appears sound. Firstly, the most useful SMAs (notably nickel‐titanium alloys, Ni‐Ti) can operate by cycling through the martensite‐austenite phases with transition temperatures of less than 100 °C.…”

Section: Introductionmentioning

confidence: 99%

“…Even seemingly minor considerations, such as the difficulty in joining Ni‐Ti wires can hamper industrial applications. [ 12 ]…”

Section: Introductionmentioning

confidence: 99%

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Actuator Materials for Environmentally Powered Engines

Spinks

Abbasi

Gautam

et al. 2023

Adv Materials Technologies

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The first solid‐state engine that converted heat into continuous mechanical motion using a thermally responsive actuating material was introduced almost a century ago. These engines used vulcanized rubber where the cyclically heating and cooling of the rubber generate continuous mechanical power in pendulum or wheel type engines. The development of solid‐state heat engines has seen several waves of activity with interest stimulated by the introduction of new actuating materials capable of responding to different environmental stimuli. Opportunities for improved engine outputs are afforded by recently developed artificial muscle materials. A theoretical connection between engine output and the characteristics of the actuator material is developed to compare the performances of vulcanized rubber, shape memory alloys (SMAs), and twisted and coiled polymer (TCP) fiber artificial muscles. It is shown that with an engine designed to suit the actuation performance of TCPs engines powered by the tensile actuation of such materials would exceed the output of SMA heat engines. The properties needed in actuator materials to further enhance engine output are identified and polymer structures that may produce such properties are described.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Actuator Materials for Environmentally Powered Engines

Spinks

Abbasi

Gautam

et al. 2023

Adv Materials Technologies

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“…Also as it is known, the above mention, cover a great range of cases as the recover energy in conventional thermal machines and the conversion of solar energy in very single way [2]. Some authors has developed mathematical model for evaluate the energy conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Basically the models consider a fix and a removable loads, their strains associated and the work cycle in the stress-strain diagram [3]. These models have been capable to determinate efficiency parameters for springs, wires and sheet made with shape memory alloys [1][2][3]. Nevertheless nobody considers crystalline orientation and their possible influence in the energy conversion efficiency.…”

Section: Introductionmentioning

confidence: 99%

Influence of crystalline orientation on the thermal-energy convertion efficiency in shape memory alloys

Cortés-Pérez

Ríos-Cortés

2014

EPJ Web of Conferences

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Abstract.A theoretical study about the influence of crystalline orientation on the energy conversion efficiency of two shape memory alloys is present. The study consider single crystal samples in simple tension. The results showed higher properties for of the NiTi than Cu-Al-Be, especially in the temperature-increment ( T) necessary for get a conversion energy cycle. However, the study showed a crystalline orientation favorable for Cu-Al-Be.

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A Thermal, Mechanical, and Materials Framework for a Shape Memory Alloy Heat Engine for Thermal Management

Chikhareva,

Vaidyanathan

2023

Nanomaterials

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Shape memory alloy (SMA) heat engines possess an inherent property of sensing a change in temperature, performing work, and rejecting heat through the shape memory effect resulting from a temperature-induced phase transformation. This work presents a framework for the design and implementation of an SMA-based Stirling heat engine for maximum torque or speed incorporating and combining mechanical, thermal, and material aspects. There is a growing need for such engines for reliable thermal management and energy recovery in both ground and space applications. Mechanical aspects were addressed from force balances in the SMA element and focused on the resulting stress distribution. Thermal aspects considered heat transfer between the SMA element and both the heat source and the heat sink. Materials aspects considered the chemical, elastic, and frictional contributions to the enthalpy of the transformation. The roles of nano- and microstructure through composition, precipitates, variant interfaces, training, cycling, texture, defects, nucleation sites (bulk vs. surface), and multi-step transformations (e.g., a trigonal R-phase transformation) in NiTi based-alloys are also emphasized. The aforementioned aspects were combined to present a figure of merit to aid in the design and implementation of a Nitinol Stirling heat engine operating to maximize torque or maximize speed.

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Lightweight thermal energy recovery system based on shape memory alloys: a DOE ARPA-E initiative

Cited by 5 publications

References 0 publications

Actuator Materials for Environmentally Powered Engines

Actuator Materials for Environmentally Powered Engines

Influence of crystalline orientation on the thermal-energy convertion efficiency in shape memory alloys

A Thermal, Mechanical, and Materials Framework for a Shape Memory Alloy Heat Engine for Thermal Management

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