Long life elastocaloric regenerator operating under compression

•Active cycling of a tube regenerator in compression in a flow system.•Assessment of its performances and optimization of the flow system.•Active cycling of the regenerator more than 100 000 times without failure.•Comparison of the performances of the regenerator before and after the cycling.•Assess...

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Veröffentlicht in:Applied thermal engineering 2022-02, Vol.202, p.117838, Article 117838
Hauptverfasser: Ianniciello, Lucia, Bartholomé, Kilian, Fitger, Andreas, Engelbrecht, Kurt
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container_title Applied thermal engineering
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creator Ianniciello, Lucia
Bartholomé, Kilian
Fitger, Andreas
Engelbrecht, Kurt
description •Active cycling of a tube regenerator in compression in a flow system.•Assessment of its performances and optimization of the flow system.•Active cycling of the regenerator more than 100 000 times without failure.•Comparison of the performances of the regenerator before and after the cycling.•Assessment of the performances when a heat load is added in the flow system. Elastocaloric cooling represents a potentially higher efficiency cooling technique that is also potentially more environmentally friendly than conventional technologies. Elastocaloric devices have now been investigated for some time for this purpose, with materials that are Cu-based, Fe-based or Ni-based. These devices are highly promising, but their main drawback is the lifetime of the devices. A solution could be to activate the devices by compression instead of tension. An active elastocaloric regenerator operating under compression composed of eight NiTi tubes was built and tested in a flow system to evaluate its performance and lifetime. Two regenerator configurations were tested, one with only the NiTi tubes in the regenerator and one with the addition of a flow distributor to improve the thermal exchange between the tubes and the heat transfer fluid. The flow system used was also optimized and modified to reach the best operating conditions. A maximum temperature span of 5 K could be reached by this regenerator and a temperature span of 0.4 K for a cooling power of 1071 W kg−1. Moreover, under compressive cycling, the regenerator could withstand more than 100 000 cycles without failure.
doi_str_mv 10.1016/j.applthermaleng.2021.117838
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Elastocaloric cooling represents a potentially higher efficiency cooling technique that is also potentially more environmentally friendly than conventional technologies. Elastocaloric devices have now been investigated for some time for this purpose, with materials that are Cu-based, Fe-based or Ni-based. These devices are highly promising, but their main drawback is the lifetime of the devices. A solution could be to activate the devices by compression instead of tension. An active elastocaloric regenerator operating under compression composed of eight NiTi tubes was built and tested in a flow system to evaluate its performance and lifetime. Two regenerator configurations were tested, one with only the NiTi tubes in the regenerator and one with the addition of a flow distributor to improve the thermal exchange between the tubes and the heat transfer fluid. The flow system used was also optimized and modified to reach the best operating conditions. A maximum temperature span of 5 K could be reached by this regenerator and a temperature span of 0.4 K for a cooling power of 1071 W kg−1. 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A maximum temperature span of 5 K could be reached by this regenerator and a temperature span of 0.4 K for a cooling power of 1071 W kg−1. Moreover, under compressive cycling, the regenerator could withstand more than 100 000 cycles without failure.</description><subject>Caloric devices</subject><subject>Compression</subject><subject>Cooling</subject><subject>Devices</subject><subject>Elastocaloric materials</subject><subject>Heat conductivity</subject><subject>Heat exchangers</subject><subject>Heat transfer</subject><subject>Intermetallic compounds</subject><subject>Nickel compounds</subject><subject>Nickel titanides</subject><subject>Regenerator</subject><subject>Service life assessment</subject><subject>Shape memory alloys</subject><subject>Temperature</subject><subject>Tubes</subject><issn>1359-4311</issn><issn>1873-5606</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><recordid>eNqNkMtKxDAUhoMoOI6-Q0G3rbk3BUFkcFQouNF1SNOTMaXT1KQj-PZ2qBt3rs6_-C-cD6EbgguCibztCjOO_fQBcW96GHYFxZQUhJSKqRO0IqpkuZBYns6aiSrnjJBzdJFShzGhquQrdF-HYZf13kEGvUlTsKYP0dsswg4GiGYKMQvjUfjZeBhaiJkN-zFCSj4Ml-jMmT7B1e9do_ft49vmOa9fn142D3VumVBTzhWHhnHmnKSNBeFwo2wlGmKcK7m1rrSkwZZzw0opJIGGGt5WvDJWUigFW6PrpXeM4fMAadJdOMRhntRU0gorwRWdXXeLy8aQUgSnx-j3Jn5rgvURme70X2T6iEwvyOb4donD_MmXh6iT9TBYaH0EO-k2-P8V_QC9Mn7T</recordid><startdate>20220205</startdate><enddate>20220205</enddate><creator>Ianniciello, Lucia</creator><creator>Bartholomé, Kilian</creator><creator>Fitger, Andreas</creator><creator>Engelbrecht, Kurt</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><orcidid>https://orcid.org/0000-0002-3713-9415</orcidid><orcidid>https://orcid.org/0000-0002-0203-4701</orcidid></search><sort><creationdate>20220205</creationdate><title>Long life elastocaloric regenerator operating under compression</title><author>Ianniciello, Lucia ; Bartholomé, Kilian ; Fitger, Andreas ; Engelbrecht, Kurt</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c358t-484eb343ff62bce5f0b8c95b1aff74ccf7c1b0c44a376561eb2a4d949ac62e753</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2022</creationdate><topic>Caloric devices</topic><topic>Compression</topic><topic>Cooling</topic><topic>Devices</topic><topic>Elastocaloric materials</topic><topic>Heat conductivity</topic><topic>Heat exchangers</topic><topic>Heat transfer</topic><topic>Intermetallic compounds</topic><topic>Nickel compounds</topic><topic>Nickel titanides</topic><topic>Regenerator</topic><topic>Service life assessment</topic><topic>Shape memory alloys</topic><topic>Temperature</topic><topic>Tubes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ianniciello, Lucia</creatorcontrib><creatorcontrib>Bartholomé, Kilian</creatorcontrib><creatorcontrib>Fitger, Andreas</creatorcontrib><creatorcontrib>Engelbrecht, Kurt</creatorcontrib><collection>CrossRef</collection><collection>Mechanical &amp; Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Applied thermal engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ianniciello, Lucia</au><au>Bartholomé, Kilian</au><au>Fitger, Andreas</au><au>Engelbrecht, Kurt</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Long life elastocaloric regenerator operating under compression</atitle><jtitle>Applied thermal engineering</jtitle><date>2022-02-05</date><risdate>2022</risdate><volume>202</volume><spage>117838</spage><pages>117838-</pages><artnum>117838</artnum><issn>1359-4311</issn><eissn>1873-5606</eissn><abstract>•Active cycling of a tube regenerator in compression in a flow system.•Assessment of its performances and optimization of the flow system.•Active cycling of the regenerator more than 100 000 times without failure.•Comparison of the performances of the regenerator before and after the cycling.•Assessment of the performances when a heat load is added in the flow system. Elastocaloric cooling represents a potentially higher efficiency cooling technique that is also potentially more environmentally friendly than conventional technologies. Elastocaloric devices have now been investigated for some time for this purpose, with materials that are Cu-based, Fe-based or Ni-based. These devices are highly promising, but their main drawback is the lifetime of the devices. A solution could be to activate the devices by compression instead of tension. An active elastocaloric regenerator operating under compression composed of eight NiTi tubes was built and tested in a flow system to evaluate its performance and lifetime. Two regenerator configurations were tested, one with only the NiTi tubes in the regenerator and one with the addition of a flow distributor to improve the thermal exchange between the tubes and the heat transfer fluid. The flow system used was also optimized and modified to reach the best operating conditions. 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subjects Caloric devices
Compression
Cooling
Devices
Elastocaloric materials
Heat conductivity
Heat exchangers
Heat transfer
Intermetallic compounds
Nickel compounds
Nickel titanides
Regenerator
Service life assessment
Shape memory alloys
Temperature
Tubes
title Long life elastocaloric regenerator operating under compression
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