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dc.contributor.authorZhang, Zhengji-
dc.contributor.authorSchiess, Ciril-
dc.contributor.authorTillenkamp, Frank-
dc.description.abstractAccurate calculations of radiator thermal performance were performed based on accurate considerations of the varying heat transfer coefficient on the radiator surface. Using a reference point, both the main equation for heat power output and the main equation for exit temperature were derived. Both equations allow the prediction of all other operating points, so that the complete thermal characteristics of a given radiator can be calculated directly from the reference point without having to consider the geometrical parameters of the radiator and the physical properties of the air under free convection. For performing the load regulation with the exit flow temperature as the target, e.g., reverse calculations for the exact setting of the mass flow were presented. Furthermore, the approaching equation contained in DIN EN442 was reviewed for its accuracy and application limitations. For designs and calculations, both the eigen-constant and the eigen-parameter were furthermore introduced, which greatly facilitates the experimental determination of the heat transfer coefficient. The established relationship between the power output and the surface area of radiators showed satisfactory agreement with the data available in the VDI Heat Atlas.de_CH
dc.publisherZHAW Zürcher Hochschule für Angewandte Wissenschaftende_CH
dc.relation.ispartofseriesIEFE Energy Papersde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectHeat exchangerde_CH
dc.subjectMain equationde_CH
dc.subjectDIN EN442de_CH
dc.subjectThermal characteristicsde_CH
dc.subjectSeries connection of radiatorsde_CH
dc.subject.ddc620: Ingenieurwesende_CH
dc.titleMain equations and thermal characteristics of radiatorsde_CH
dc.typeWorking Paper – Gutachten – Studiede_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitut für Energiesysteme und Fluid-Engineering (IEFE)de_CH
zhaw.series.number11, 3de_CH
zhaw.webfeedEnergiesysteme und Kältetechnikde_CH
zhaw.webfeedFluid-Engineering / Optimierung im CFEde_CH
zhaw.webfeedModellbasierte Prozessoptimierungde_CH
Appears in collections:IEFE Energy Papers

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