Enhancing Low-Grade Thermal Energy Recovery in a Thermally Regenerative Ammonia Battery Using Elevated Temperatures

Handle URI:
http://hdl.handle.net/10754/598193
Title:
Enhancing Low-Grade Thermal Energy Recovery in a Thermally Regenerative Ammonia Battery Using Elevated Temperatures
Authors:
Zhang, Fang; LaBarge, Nicole; Yang, Wulin; Liu, Jia; Logan, Bruce E.
Abstract:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA. A thermally regenerative ammonia battery (TRAB) is a new approach for converting low-grade thermal energy into electricity by using an ammonia electrolyte and copper electrodes. TRAB operation at 72°C produced a power density of 236±8 Wm-2, with a linear decrease in power to 95±5 Wm-2 at 23°C. The improved power at higher temperatures was due to reduced electrode overpotentials and more favorable thermodynamics for the anode reaction (copper oxidation). The energy density varied with temperature and discharge rates, with a maximum of 650 Whm-3 at a discharge energy efficiency of 54% and a temperature of 37°C. The energy efficiency calculated with chemical process simulation software indicated a Carnot-based efficiency of up to 13% and an overall thermal energy recovery of 0.5%. It should be possible to substantially improve these energy recoveries through optimization of electrolyte concentrations and by using improved ion-selective membranes and energy recovery systems such as heat exchangers.
Citation:
Zhang F, LaBarge N, Yang W, Liu J, Logan BE (2015) Enhancing Low-Grade Thermal Energy Recovery in a Thermally Regenerative Ammonia Battery Using Elevated Temperatures. ChemSusChem 8: 1043–1048. Available: http://dx.doi.org/10.1002/cssc.201403290.
Publisher:
Wiley-Blackwell
Journal:
ChemSusChem
KAUST Grant Number:
KUS-I1-003-13
Issue Date:
13-Feb-2015
DOI:
10.1002/cssc.201403290
PubMed ID:
25684619
Type:
Article
ISSN:
1864-5631
Sponsors:
The authors thank David Jones for help with the analytical measurements. We also thank Dr. Marta Hatzell for useful discussions. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Fangen
dc.contributor.authorLaBarge, Nicoleen
dc.contributor.authorYang, Wulinen
dc.contributor.authorLiu, Jiaen
dc.contributor.authorLogan, Bruce E.en
dc.date.accessioned2016-02-25T13:14:27Zen
dc.date.available2016-02-25T13:14:27Zen
dc.date.issued2015-02-13en
dc.identifier.citationZhang F, LaBarge N, Yang W, Liu J, Logan BE (2015) Enhancing Low-Grade Thermal Energy Recovery in a Thermally Regenerative Ammonia Battery Using Elevated Temperatures. ChemSusChem 8: 1043–1048. Available: http://dx.doi.org/10.1002/cssc.201403290.en
dc.identifier.issn1864-5631en
dc.identifier.pmid25684619en
dc.identifier.doi10.1002/cssc.201403290en
dc.identifier.urihttp://hdl.handle.net/10754/598193en
dc.description.abstract© 2015 WILEY-VCH Verlag GmbH & Co. KGaA. A thermally regenerative ammonia battery (TRAB) is a new approach for converting low-grade thermal energy into electricity by using an ammonia electrolyte and copper electrodes. TRAB operation at 72°C produced a power density of 236±8 Wm-2, with a linear decrease in power to 95±5 Wm-2 at 23°C. The improved power at higher temperatures was due to reduced electrode overpotentials and more favorable thermodynamics for the anode reaction (copper oxidation). The energy density varied with temperature and discharge rates, with a maximum of 650 Whm-3 at a discharge energy efficiency of 54% and a temperature of 37°C. The energy efficiency calculated with chemical process simulation software indicated a Carnot-based efficiency of up to 13% and an overall thermal energy recovery of 0.5%. It should be possible to substantially improve these energy recoveries through optimization of electrolyte concentrations and by using improved ion-selective membranes and energy recovery systems such as heat exchangers.en
dc.description.sponsorshipThe authors thank David Jones for help with the analytical measurements. We also thank Dr. Marta Hatzell for useful discussions. This research was supported by Award KUS-I1-003-13 from the King Abdullah University of Science and Technology (KAUST).en
dc.publisherWiley-Blackwellen
dc.subjectammoniaen
dc.subjectcopperen
dc.subjectelectrochemistryen
dc.subjectenergy conversionen
dc.subjectsustainable chemistryen
dc.titleEnhancing Low-Grade Thermal Energy Recovery in a Thermally Regenerative Ammonia Battery Using Elevated Temperaturesen
dc.typeArticleen
dc.identifier.journalChemSusChemen
dc.contributor.institutionPennsylvania State University, State College, United Statesen
dc.contributor.institutionTsinghua University, Beijing, Chinaen
kaust.grant.numberKUS-I1-003-13en

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