Thermodynamic performance analysis and modified thermo-ecological cost optimization of a hybrid district heating system considering energy levels

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorChen, Yuzhu
dc.contributor.authorHua, Huilian
dc.contributor.authorWang, Jun
dc.contributor.authorLund, Peter D.
dc.contributor.departmentSoutheast University, Nanjing
dc.contributor.departmentNew Energy Technologies
dc.contributor.departmentDepartment of Applied Physicsen
dc.date.accessioned2021-03-10T07:26:26Z
dc.date.available2021-03-10T07:26:26Z
dc.date.embargoinfo:eu-repo/date/embargoEnd/2023-02-24
dc.date.issued2021-06-01
dc.description.abstractUtilization of the renewable resources in district heating systems can reduce the use of fossil fuels, operating costs and protect the environment. In this study, an integrated hybrid system consisting of concentrating photovoltaic/thermal collectors (PV/T), geothermal (GSHP) and absorption (AHP) heat pumps is considered for district heating. The thermodynamic performance of the system at various conditions is explored through detailed simulations. A modified thermo-ecological cost (TEC) method is used to optimize the structure of the PV/T by considering contributions of different flows. The results show that a higher solar irradiance level and a higher PV coverage ratio have a positive impact on the thermal performance of the hybrid system. The TEC-based optimization shows that a 66% PV coverage ratio of PV/T yields a minimum thermo-ecological heating cost of 6.86 J/J, which is slightly lower than cost with a conventional method. Based on the sensitivity analysis, other key parameters except the operating time and the PV coverage ratio have a negative influence on the economic performance of the district heating system, because of the increasing cumulative exergy consumption of the GSHP or PV/T.en
dc.description.versionPeer revieweden
dc.format.extent15
dc.format.mimetypeapplication/pdf
dc.identifier.citationChen , Y , Hua , H , Wang , J & Lund , P D 2021 , ' Thermodynamic performance analysis and modified thermo-ecological cost optimization of a hybrid district heating system considering energy levels ' , Energy , vol. 224 , 120067 . https://doi.org/10.1016/j.energy.2021.120067en
dc.identifier.doi10.1016/j.energy.2021.120067
dc.identifier.issn0360-5442
dc.identifier.issn1873-6785
dc.identifier.otherPURE UUID: 3424a885-5309-4b64-a865-4dab10bcb339
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/3424a885-5309-4b64-a865-4dab10bcb339
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85101372421&partnerID=8YFLogxK
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/56799943/SCI_Chen_Thermodynamic.1_s2.0_S0360544221003169_main.pdf
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/102949
dc.identifier.urnURN:NBN:fi:aalto-202103102235
dc.language.isoenen
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartofseriesEnergyen
dc.relation.ispartofseriesVolume 224en
dc.rightsopenAccessen
dc.subject.keywordDistrict heating system
dc.subject.keywordGeothermal heat pump
dc.subject.keywordModified thermo-ecological optimization
dc.subject.keywordPhotovoltaic/thermal collectors
dc.subject.keywordThermodynamic performance
dc.titleThermodynamic performance analysis and modified thermo-ecological cost optimization of a hybrid district heating system considering energy levelsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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