Design and test of a multi-coil helical evaporator for a high temperature organic Rankine cycle plant driven by biogas waste heat

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dc.contributor.authorLinnemann, Matthias
dc.contributor.authorPriebe, Klaus-Peter
dc.contributor.authorHerres, Gerhard
dc.contributor.authorWolff, Carsten
dc.contributor.authorVrabec, Jadran
dc.date.accessioned2019-10-17T13:51:44Z
dc.date.available2019-10-17T13:51:44Z
dc.date.issued2019-06-21
dc.description.abstractA direct evaporator for a high temperature organic Rankine cycle (ORC) plant with toluene as a working fluid is designed and tested. The exhaust gas from a 800 kWe combined heat and power plant is cooled on the shell side of the present heat exchanger, while the working fluid is heated and evaporated within eight helically coiled tubes, constituting a tube bundle. A method to obtain optimal design parameters for this type of heat exchanger is presented, considering the heat source, the ORC and the available space at the test site. After manufacturing, the apparatus is tested to validate the design procedure, focusing on the employed heat transfer and pressure loss correlations on the shell side. It is shown that the predicted values of the overall heat transfer coefficient and the shell side Nusselt number are in good agreement with experimental data, showing a maximum deviation of 5.5%. The measured shell side pressure loss is slightly higher than the predicted value, indicating that the correlation underestimates the pressure loss coefficient by up to 7% at low Reynolds numbers, but has a good accuracy at higher Reynolds numbers. It is observed that it is essential to adjust the mass flow rate of the working fluid in each coil to obtain a homogenous vapor quality. A reliable operation of the direct evaporator with a maximum heat flow of 225 kW is shown.en
dc.identifier.eissn1879-2227
dc.identifier.issn0196-8904
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/10130
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-9119
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-9842
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc600 Technik, Technologiede
dc.subject.otherdirect evaporatoren
dc.subject.otherorganic Rankine cycleen
dc.subject.otherORCen
dc.subject.othermulti-coil helical heat exchangeren
dc.subject.otherwaste heat recoveryen
dc.titleDesign and test of a multi-coil helical evaporator for a high temperature organic Rankine cycle plant driven by biogas waste heaten
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1016/j.enconman.2019.05.053en
dcterms.bibliographicCitation.journaltitleEnergy Conversion and Managementen
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdam [u.a.]en
dcterms.bibliographicCitation.pageend1414en
dcterms.bibliographicCitation.pagestart1402en
dcterms.bibliographicCitation.volume195en
tub.accessrights.dnbfree*
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Prozess- und Verfahrenstechnik::FG Thermodynamik und Thermische Verfahrenstechnikde
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Thermodynamik und Thermische Verfahrenstechnikde
tub.affiliation.instituteInst. Prozess- und Verfahrenstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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