Enhanced dynamic performance evaluation method of line-concentrating solar collectors

Zirkel-Hofer, Annie; Krämer, Korbinian; Heimsath, Anna; Scholl, Stephan; Platzer, Werner

doi:10.1063/1.5067085

Cited by 4 publications

(4 citation statements)

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“…This indicates that can be identified with a much lower uncertainty, as compared to , and 115 ° . This meets the expectations (also according to the findings by Zirkel-Hofer [5]), as the heat losses have a small impact on the collector yield, in particular because the system is operated at relatively low temperatures. and with the ParaID methodology (solid lines).…”

Section: Confidence Interval Calculation For Paraid Approach With Boo...supporting

confidence: 88%

“…2, left). Contrary to the classical ISO 9806 procedure, the underlying PlugFlow model [5] of the discretized absorber tube model represents the heat capacity of fluid and collector structures with real material models (instead of identifying ).…”

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

“…IAM identification implies a large number of additional degrees of freedom, as compared to the base case. Thus, it is only possible if the database is sufficiently large (more than 12 measurement days [5]), which is the case in this study. Furthermore, IAM identification is only possible on angle nodes for which sufficient measurement data (usually in terms of cumulative DNI) is available.…”

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

“…More detailed information on the ParaID approach is provided by Zirkel-Hofer et al [5,6], who originally authored and implemented the methodology.…”

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

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Comparison of advanced parameter identification methods for linear Fresnel collectors in application to measurement data

Schöttl

Montenon

Papanicolas

et al. 2022

AIP Conference Proceedings

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Modeling of the Linear Fresnel collectors in a real environment using standardized, state-of-the-art approaches is still inaccurate, yet it is crucial for robust loop control and collector yield assessment. Two advanced parameter identification methodologies -ParaID by Fraunhofer ISE and RealTrackEff by the Cyprus Institute -are compared in terms of the underlying equations, which extend ISO 9806. Both approaches are then applied to a Linear Fresnel collector research facility at the Cyprus Institute, for which a database of more than 50 measurement days is available, including reflectometric measurements. For both methods, several variations with increasing complexity are tested and the quality of the resulting fit in terms of outlet temperature is studied. Both methods take into account soiling/cleanliness and nonlinear collector behavior. While ParaID focuses on the identification of the IAMs in a real environment, the method by the Cyprus Institute links the efficiency to non-linear tracking effects. Real collector characteristics like varying cleanliness and asymmetric collector behavior are found to have a strong impact on the collector performance and the identified parameters. For the ParaID approach, additional results regarding confidence intervals based on Bootstrapping and regarding identified Incidence Angle Modifiers are presented.

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Section: Confidence Interval Calculation For Paraid Approach With Boo...supporting

confidence: 88%

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

“…More detailed information on the ParaID approach is provided by Zirkel-Hofer et al [5,6], who originally authored and implemented the methodology.…”

Section: Paraid Approach By Fraunhofer Ise [5 6]mentioning

confidence: 99%

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