Heat recovery from wastewater: numerical modelling of sewer systems

Detalhes bibliográficos
Autor(a) principal: Silva, Ana Margarida Barradinhas da
Data de Publicação: 2012
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10362/8473
Resumo: Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, perfil Engenharia Sanitária
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spelling Heat recovery from wastewater: numerical modelling of sewer systemsWastewaterHeat recoveryNumerical modellingLax- Wendroff methodMass balance equationsHeat balance equationsDissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, perfil Engenharia SanitáriaThis thesis was carried as a collaboration of Delft University of Technology (TU Delft) and the companies Waternet and KWR. The main project aims to study the possibility of thermal energy recovery from wastewater, reducing the carbon dioxide (CO2) emissions linked to the energy sector. The present work is based on a previous computational model that was developed to simulate heat recovery from wastewater for constant flow rate and temperature of water. The first goal is to simulate a wastewater discharge. In order to achieve this, a Gaussian function was added to the boundary conditions for water flow rate and water temperature. As a second goal, this work aims to assess the significance of the terms present in the water heat balance and air heat balance equations. Binary coefficients were added in each term of both equations and then all the combinations were computed. The unsteady situation successfully simulated a main discharge and numerical predictions for water temperature and flow rate are presented. The deviations associated with the modified cases for the two equations suggest that the heat flux pipe to water (!!") and heat flux pipe to air (!!") terms are crucial for water and air heat balance predictions,respectively. In order to smooth extra oscillations, the time step (dt) was reduced and a smaller relative size of oscillations was obtained. This work concludes with a section of future developments in order to improve the results obtained. Despite of the fact that the current state of these routines does not allow us to accurately assess heat exchanges in pipes, promising results were obtained, proving that numerical modelling of heat recovery will contribute greatly to the development of the main project.Faculdade de Ciências e TecnologiaAmaral, LeonorRUNSilva, Ana Margarida Barradinhas da2013-01-08T15:39:49Z20122012-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10362/8473enginfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-11T03:41:06Zoai:run.unl.pt:10362/8473Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:18:13.120852Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Heat recovery from wastewater: numerical modelling of sewer systems
title Heat recovery from wastewater: numerical modelling of sewer systems
spellingShingle Heat recovery from wastewater: numerical modelling of sewer systems
Silva, Ana Margarida Barradinhas da
Wastewater
Heat recovery
Numerical modelling
Lax- Wendroff method
Mass balance equations
Heat balance equations
title_short Heat recovery from wastewater: numerical modelling of sewer systems
title_full Heat recovery from wastewater: numerical modelling of sewer systems
title_fullStr Heat recovery from wastewater: numerical modelling of sewer systems
title_full_unstemmed Heat recovery from wastewater: numerical modelling of sewer systems
title_sort Heat recovery from wastewater: numerical modelling of sewer systems
author Silva, Ana Margarida Barradinhas da
author_facet Silva, Ana Margarida Barradinhas da
author_role author
dc.contributor.none.fl_str_mv Amaral, Leonor
RUN
dc.contributor.author.fl_str_mv Silva, Ana Margarida Barradinhas da
dc.subject.por.fl_str_mv Wastewater
Heat recovery
Numerical modelling
Lax- Wendroff method
Mass balance equations
Heat balance equations
topic Wastewater
Heat recovery
Numerical modelling
Lax- Wendroff method
Mass balance equations
Heat balance equations
description Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente, perfil Engenharia Sanitária
publishDate 2012
dc.date.none.fl_str_mv 2012
2012-01-01T00:00:00Z
2013-01-08T15:39:49Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10362/8473
url http://hdl.handle.net/10362/8473
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
publisher.none.fl_str_mv Faculdade de Ciências e Tecnologia
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
_version_ 1799137828310876160

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