Determining 'as built' heat loss coefficient – the impact of modelling methods of solar radiation distribution.

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Title: Determining 'as built' heat loss coefficient – the impact of modelling methods of solar radiation distribution.
Authors: Grudzińska, Magdalena1 (AUTHOR) m.grudzinska@pollub.pl, Baborska-Narożny, Magdalena2 (AUTHOR), Bandurski, Karol3 (AUTHOR)
Source: Journal of Building Performance Simulation. Jun2026, Vol. 19 Issue 4, p780-789. 10p.
Subjects: Solar radiation, Ray tracing algorithms, Energy consumption of buildings, Sustainable buildings, Solar heating, Heat radiation & absorption, Heat transfer coefficient
Abstract: Solar heat gains are one of the key factors in the amount of energy supplied to a building. To calculate the solar heat gains profile for the interior of a building during a required time (hourly, daily, weekly, etc.), solar radiation distribution needs to be established. Two distinct approaches to radiation modelling prevail in simulation, standard and detailed, usually based accordingly on simplified solar distribution factors and more precise ray-tracing techniques. However, there is a lack of clarity on their impact on calculation results. Here the influence of selecting either method is evaluated based on a comparison of transmission heat loss coefficient (HLC) following a whole-house heat loss test conducted in a low-energy building. The results indicated less than a 1% difference in the outcomes between the two modelling approaches. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Building Performance Simulation is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 194221731
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  Label: Title
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  Data: Determining 'as built' heat loss coefficient – the impact of modelling methods of solar radiation distribution.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Grudzińska%2C+Magdalena%22">Grudzińska, Magdalena</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> m.grudzinska@pollub.pl</i><br /><searchLink fieldCode="AR" term="%22Baborska-Narożny%2C+Magdalena%22">Baborska-Narożny, Magdalena</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bandurski%2C+Karol%22">Bandurski, Karol</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Building+Performance+Simulation%22">Journal of Building Performance Simulation</searchLink>. Jun2026, Vol. 19 Issue 4, p780-789. 10p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Solar+radiation%22">Solar radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Ray+tracing+algorithms%22">Ray tracing algorithms</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+consumption+of+buildings%22">Energy consumption of buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Sustainable+buildings%22">Sustainable buildings</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+heating%22">Solar heating</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+radiation+%26+absorption%22">Heat radiation & absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer+coefficient%22">Heat transfer coefficient</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Solar heat gains are one of the key factors in the amount of energy supplied to a building. To calculate the solar heat gains profile for the interior of a building during a required time (hourly, daily, weekly, etc.), solar radiation distribution needs to be established. Two distinct approaches to radiation modelling prevail in simulation, standard and detailed, usually based accordingly on simplified solar distribution factors and more precise ray-tracing techniques. However, there is a lack of clarity on their impact on calculation results. Here the influence of selecting either method is evaluated based on a comparison of transmission heat loss coefficient (HLC) following a whole-house heat loss test conducted in a low-energy building. The results indicated less than a 1% difference in the outcomes between the two modelling approaches. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Building Performance Simulation is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/19401493.2025.2511814
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 10
        StartPage: 780
    Subjects:
      – SubjectFull: Solar radiation
        Type: general
      – SubjectFull: Ray tracing algorithms
        Type: general
      – SubjectFull: Energy consumption of buildings
        Type: general
      – SubjectFull: Sustainable buildings
        Type: general
      – SubjectFull: Solar heating
        Type: general
      – SubjectFull: Heat radiation & absorption
        Type: general
      – SubjectFull: Heat transfer coefficient
        Type: general
    Titles:
      – TitleFull: Determining 'as built' heat loss coefficient – the impact of modelling methods of solar radiation distribution.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Grudzińska, Magdalena
      – PersonEntity:
          Name:
            NameFull: Baborska-Narożny, Magdalena
      – PersonEntity:
          Name:
            NameFull: Bandurski, Karol
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 19
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              Value: 4
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            – TitleFull: Journal of Building Performance Simulation
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