Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?

The use of thermoelectric heat pumps for heat, ventilation, and air conditioning in nearly-zero-energy buildings is one of the most promising applications of thermoelectrics. However, simulation works in the literature are predominately based on the simple model, which was proven to exhibit signific...

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Authors: Martínez Echeverri, Álvaro, Díaz de Garayo, Sergio, Aranguren Garacochea, Patricia, Araiz Vega, Miguel, Catalán Ros, Leyre
Format: article
Status:Published version
Publication Date:2021
Country:España
Institution:Universidad Pública de Navarra
Repository:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/48314
Online Access:https://hdl.handle.net/2454/48314
Access Level:Open access
Keyword:Thermoelectric heat pump
Nearly zero energy building
Modelling
Uncertainty analysis
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spelling Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?Martínez Echeverri, ÁlvaroDíaz de Garayo, SergioAranguren Garacochea, PatriciaAraiz Vega, MiguelCatalán Ros, LeyreThermoelectric heat pumpNearly zero energy buildingModellingUncertainty analysisThe use of thermoelectric heat pumps for heat, ventilation, and air conditioning in nearly-zero-energy buildings is one of the most promising applications of thermoelectrics. However, simulation works in the literature are predominately based on the simple model, which was proven to exhibit significant deviations from experimental results. Nine modelling techniques have been compared in this work, according to statistical methods based on uncertainty analysis, in terms of predicted coefficient of performance and cooling power. These techniques come from the combination of three simulation models for thermoelectric modules (simple model, improved model, electric analogy) and five methods for implementing the thermoelectric properties. The main conclusion is that there is no statistical difference in the mean values of coefficient of performance and cooling power provided by these modelling techniques under all the scenarios, at 95% level of confidence. However, differences appear in the precision of these results in terms of uncertainty of the confidence intervals. Minimum values of uncertainty are obtained when the thermal resistance ratio approaches 0.1, being ±8% when using temperature-dependent expressions for the thermoelectric properties, ±18% when using Lineykin's method, and ± 25% when using Chen's method. The best combination is that composed of the simple model and temperature-dependent expressions for the thermoelectric properties. Additionally, if low values of resistance ratio are anticipated, empirical expressions from the literature can be used for the thermal resistance of the heat exchangers; for high values, though, experimental tests should be deployed, especially for the heat exchanger on the hot side.ElsevierIngenieríaIngeniaritzaInstitute of Smart Cities - ISC2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2454/48314reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglés© 2021 The Authors. This is an open access article under the CC BY-NC-ND license.https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/483142026-06-17T12:41:47Z
dc.title.none.fl_str_mv Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
title Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
spellingShingle Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
Martínez Echeverri, Álvaro
Thermoelectric heat pump
Nearly zero energy building
Modelling
Uncertainty analysis
title_short Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
title_full Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
title_fullStr Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
title_full_unstemmed Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
title_sort Simulation of thermoelectric heat pumps in nearly zero energy buildings: why do all models seem to be right?
dc.creator.none.fl_str_mv Martínez Echeverri, Álvaro
Díaz de Garayo, Sergio
Aranguren Garacochea, Patricia
Araiz Vega, Miguel
Catalán Ros, Leyre
author Martínez Echeverri, Álvaro
author_facet Martínez Echeverri, Álvaro
Díaz de Garayo, Sergio
Aranguren Garacochea, Patricia
Araiz Vega, Miguel
Catalán Ros, Leyre
author_role author
author2 Díaz de Garayo, Sergio
Aranguren Garacochea, Patricia
Araiz Vega, Miguel
Catalán Ros, Leyre
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ingeniería
Ingeniaritza
Institute of Smart Cities - ISC
dc.subject.none.fl_str_mv Thermoelectric heat pump
Nearly zero energy building
Modelling
Uncertainty analysis
topic Thermoelectric heat pump
Nearly zero energy building
Modelling
Uncertainty analysis
description The use of thermoelectric heat pumps for heat, ventilation, and air conditioning in nearly-zero-energy buildings is one of the most promising applications of thermoelectrics. However, simulation works in the literature are predominately based on the simple model, which was proven to exhibit significant deviations from experimental results. Nine modelling techniques have been compared in this work, according to statistical methods based on uncertainty analysis, in terms of predicted coefficient of performance and cooling power. These techniques come from the combination of three simulation models for thermoelectric modules (simple model, improved model, electric analogy) and five methods for implementing the thermoelectric properties. The main conclusion is that there is no statistical difference in the mean values of coefficient of performance and cooling power provided by these modelling techniques under all the scenarios, at 95% level of confidence. However, differences appear in the precision of these results in terms of uncertainty of the confidence intervals. Minimum values of uncertainty are obtained when the thermal resistance ratio approaches 0.1, being ±8% when using temperature-dependent expressions for the thermoelectric properties, ±18% when using Lineykin's method, and ± 25% when using Chen's method. The best combination is that composed of the simple model and temperature-dependent expressions for the thermoelectric properties. Additionally, if low values of resistance ratio are anticipated, empirical expressions from the literature can be used for the thermal resistance of the heat exchangers; for high values, though, experimental tests should be deployed, especially for the heat exchanger on the hot side.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/48314
url https://hdl.handle.net/2454/48314
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv © 2021 The Authors. This is an open access article under the CC BY-NC-ND license.
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2021 The Authors. This is an open access article under the CC BY-NC-ND license.
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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