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A Projection And Clipping Method To Calculate Direct, Diffuse, And Reflected Irradiation

Estevam Schmiedt, Jacob and Schiricke, Björn (2020) A Projection And Clipping Method To Calculate Direct, Diffuse, And Reflected Irradiation. In: Porceedings of Building Simulation 2019: 16th Conference of IBPSA. Building Simulation 2019 Conference, 2. - 4. Sept. 2019, Rom, Italia. doi: 10.26868/25222708.2019.210515. ISBN 978-1-7750520-1-2.

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Official URL: http://www.ibpsa.org/proceedings/BS2019/BS2019_210515.pdf

Abstract

Various approaches are used to determine direct, sky diffuse, and reflected contributions to the solar irradiance on building surfaces. Among these are ray tracing, pixel counting, and projection and clipping. Projection and clipping is closest to an exact solution but it is often considered as too slow. This paper presents an improved projection and clipping method to determine the direct and the sky diffuse contribution to the irradiance. In a second step a projection and clipping approach is applied to calculate the view factors between building surfaces, so that the reflected contribution can be obtained. The presented approach delivers results which are comparable to those obtained by EnergyPlus in acceptable computation time. This shows that modern building simulation tools can benefit from an approach that applies fewer approximations than common raytracing or pixel counting techniques.

Item URL in elib:https://elib.dlr.de/133353/
Document Type:Conference or Workshop Item (Speech)
Title:A Projection And Clipping Method To Calculate Direct, Diffuse, And Reflected Irradiation
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Estevam Schmiedt, JacobJacob.EstevamSchmiedt (at) dlr.dehttps://orcid.org/0000-0002-0794-6769
Schiricke, BjörnBjoern.Schiricke (at) dlr.dehttps://orcid.org/0000-0003-0572-2048
Date:2020
Journal or Publication Title:Porceedings of Building Simulation 2019: 16th Conference of IBPSA
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI:10.26868/25222708.2019.210515
Editors:
EditorsEmailEditor's ORCID iD
Corrado, V.UNSPECIFIEDUNSPECIFIED
Gasparella, A.UNSPECIFIEDUNSPECIFIED
ISBN:978-1-7750520-1-2
Status:Published
Keywords:direct and diffuse irradiance, clipping operations, sky Radiation, ray tracing
Event Title:Building Simulation 2019 Conference
Event Location:Rom, Italia
Event Type:international Conference
Event Dates:2. - 4. Sept. 2019
Organizer:International Building Performance Simulation Association
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:High-Temperature Thermal Technologies
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Condition Monitoring
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:09 Jan 2020 08:31
Last Modified:30 Mar 2021 14:23

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