A simplified model for linear correlation between annual yield and DNI for parabolic trough collectors

Benjamin Ahlgren, Zhiyong Tian*, Bengt Perers, Janne Dragsted, Emma Johansson, Kajsa Lundberg, Jonatan Mossegård, Joakim Byström, Olle Olsson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper proposes a simple method for estimating annual thermal performance of parabolic trough collectors (PTCs) based on a linear relation with annual DNI for a certain latitude. A case study with simulations for a novel concentrating solar collector in 316 locations for three operating temperature scenarios worldwide was carried out and showed promising results for the latitudes and continents investigated. For a certain latitude and mean operating temperature, the annual yield of a PTC was found to be linearly proportional to yearly DNI. The proposed method will serve as a simplified alternative to the steady-state and quasi-dynamic methods already used. Estimating performance based on yearly DNI can be used by design engineers to do quick preliminary planning of solar plants. Customers can also use this method to evaluate existing solar collector installations. A TRNSYS/TRNSED tool that uses a steady-state model has been developed to carry out the simulations and it has been validated against a PTC array at Technical University of Denmark (DTU). The results show that the simplified method can give reliable estimates of long-term performance of parabolic trough collectors.
Original languageEnglish
JournalEnergy Conversion and Management
Volume174
Pages (from-to)295-308
Number of pages14
ISSN0196-8904
DOIs
Publication statusPublished - 2018

Keywords

  • Annual yield
  • DNI
  • Parabolic trough collectors
  • Simplified methods

Cite this

Ahlgren, Benjamin ; Tian, Zhiyong ; Perers, Bengt ; Dragsted, Janne ; Johansson, Emma ; Lundberg, Kajsa ; Mossegård, Jonatan ; Byström, Joakim ; Olsson, Olle. / A simplified model for linear correlation between annual yield and DNI for parabolic trough collectors. In: Energy Conversion and Management. 2018 ; Vol. 174. pp. 295-308.
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title = "A simplified model for linear correlation between annual yield and DNI for parabolic trough collectors",
abstract = "This paper proposes a simple method for estimating annual thermal performance of parabolic trough collectors (PTCs) based on a linear relation with annual DNI for a certain latitude. A case study with simulations for a novel concentrating solar collector in 316 locations for three operating temperature scenarios worldwide was carried out and showed promising results for the latitudes and continents investigated. For a certain latitude and mean operating temperature, the annual yield of a PTC was found to be linearly proportional to yearly DNI. The proposed method will serve as a simplified alternative to the steady-state and quasi-dynamic methods already used. Estimating performance based on yearly DNI can be used by design engineers to do quick preliminary planning of solar plants. Customers can also use this method to evaluate existing solar collector installations. A TRNSYS/TRNSED tool that uses a steady-state model has been developed to carry out the simulations and it has been validated against a PTC array at Technical University of Denmark (DTU). The results show that the simplified method can give reliable estimates of long-term performance of parabolic trough collectors.",
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A simplified model for linear correlation between annual yield and DNI for parabolic trough collectors. / Ahlgren, Benjamin; Tian, Zhiyong; Perers, Bengt; Dragsted, Janne; Johansson, Emma; Lundberg, Kajsa; Mossegård, Jonatan; Byström, Joakim; Olsson, Olle.

In: Energy Conversion and Management, Vol. 174, 2018, p. 295-308.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - A simplified model for linear correlation between annual yield and DNI for parabolic trough collectors

AU - Ahlgren, Benjamin

AU - Tian, Zhiyong

AU - Perers, Bengt

AU - Dragsted, Janne

AU - Johansson, Emma

AU - Lundberg, Kajsa

AU - Mossegård, Jonatan

AU - Byström, Joakim

AU - Olsson, Olle

PY - 2018

Y1 - 2018

N2 - This paper proposes a simple method for estimating annual thermal performance of parabolic trough collectors (PTCs) based on a linear relation with annual DNI for a certain latitude. A case study with simulations for a novel concentrating solar collector in 316 locations for three operating temperature scenarios worldwide was carried out and showed promising results for the latitudes and continents investigated. For a certain latitude and mean operating temperature, the annual yield of a PTC was found to be linearly proportional to yearly DNI. The proposed method will serve as a simplified alternative to the steady-state and quasi-dynamic methods already used. Estimating performance based on yearly DNI can be used by design engineers to do quick preliminary planning of solar plants. Customers can also use this method to evaluate existing solar collector installations. A TRNSYS/TRNSED tool that uses a steady-state model has been developed to carry out the simulations and it has been validated against a PTC array at Technical University of Denmark (DTU). The results show that the simplified method can give reliable estimates of long-term performance of parabolic trough collectors.

AB - This paper proposes a simple method for estimating annual thermal performance of parabolic trough collectors (PTCs) based on a linear relation with annual DNI for a certain latitude. A case study with simulations for a novel concentrating solar collector in 316 locations for three operating temperature scenarios worldwide was carried out and showed promising results for the latitudes and continents investigated. For a certain latitude and mean operating temperature, the annual yield of a PTC was found to be linearly proportional to yearly DNI. The proposed method will serve as a simplified alternative to the steady-state and quasi-dynamic methods already used. Estimating performance based on yearly DNI can be used by design engineers to do quick preliminary planning of solar plants. Customers can also use this method to evaluate existing solar collector installations. A TRNSYS/TRNSED tool that uses a steady-state model has been developed to carry out the simulations and it has been validated against a PTC array at Technical University of Denmark (DTU). The results show that the simplified method can give reliable estimates of long-term performance of parabolic trough collectors.

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