Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window
The visual linking of a building’s occupants with the outside views is a basic property of windows. However, vision through windows is not yet a metricized factor. The previous research employs a human survey methods to assess the vision through conventional windows. The recently fabricated smart fi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/15/9/3196 |
| _version_ | 1797505025027604480 |
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| author | Mohammed Lami Faris Al-naemi Hameed Alrashidi Walid Issa |
| author_facet | Mohammed Lami Faris Al-naemi Hameed Alrashidi Walid Issa |
| author_sort | Mohammed Lami |
| collection | DOAJ |
| description | The visual linking of a building’s occupants with the outside views is a basic property of windows. However, vision through windows is not yet a metricized factor. The previous research employs a human survey methods to assess the vision through conventional windows. The recently fabricated smart films add a changeable visual transparency feature to the windows. The varied operating transparency challenges the evaluation of vision. Therefore, surveying human preferences is no longer a feasible approach for smart windows. This paper proposes an image-processing-based approach to quantify the vision quality through smart windows. The proposed method was experimentally applied to a polymer dispersed liquid crystal (PDLC) double-glazed window. The system instantaneously determines the available contrast band of the scenes seen through the window. The system adjusts the excitation of the PDLC film to maintain a desired vision level within the determined vision band. A preferred vision ratio (<i>PVR</i>) is proposed to meet the requirements of occupant comfort. The impact of the <i>PVR</i> on vision quality, solar heat gain, and daylight performance was investigated experimentally. The results show that the system can determine the available vision comfort band during daytime considering different occupant requirements. |
| first_indexed | 2024-03-10T04:12:46Z |
| format | Article |
| id | doaj.art-168436092f124aca8b95cb9c0120d7d0 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T04:12:46Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-168436092f124aca8b95cb9c0120d7d02023-11-23T08:07:52ZengMDPI AGEnergies1996-10732022-04-01159319610.3390/en15093196Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed WindowMohammed Lami0Faris Al-naemi1Hameed Alrashidi2Walid Issa3Industry & Innovation Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UKIndustry & Innovation Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UKKuwait Fund for Arab Economic Development, Mubarak Al-Kabeer St., Safat, P.O. Box 2921, Kuwait City 13030, KuwaitIndustry & Innovation Research Institute, Sheffield Hallam University, Sheffield S1 1WB, UKThe visual linking of a building’s occupants with the outside views is a basic property of windows. However, vision through windows is not yet a metricized factor. The previous research employs a human survey methods to assess the vision through conventional windows. The recently fabricated smart films add a changeable visual transparency feature to the windows. The varied operating transparency challenges the evaluation of vision. Therefore, surveying human preferences is no longer a feasible approach for smart windows. This paper proposes an image-processing-based approach to quantify the vision quality through smart windows. The proposed method was experimentally applied to a polymer dispersed liquid crystal (PDLC) double-glazed window. The system instantaneously determines the available contrast band of the scenes seen through the window. The system adjusts the excitation of the PDLC film to maintain a desired vision level within the determined vision band. A preferred vision ratio (<i>PVR</i>) is proposed to meet the requirements of occupant comfort. The impact of the <i>PVR</i> on vision quality, solar heat gain, and daylight performance was investigated experimentally. The results show that the system can determine the available vision comfort band during daytime considering different occupant requirements.https://www.mdpi.com/1996-1073/15/9/3196vision through windowsvisual comfortPDLC smart filmsmart windowsimage processing |
| spellingShingle | Mohammed Lami Faris Al-naemi Hameed Alrashidi Walid Issa Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window Energies vision through windows visual comfort PDLC smart film smart windows image processing |
| title | Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window |
| title_full | Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window |
| title_fullStr | Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window |
| title_full_unstemmed | Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window |
| title_short | Quantifying of Vision through Polymer Dispersed Liquid Crystal Double-Glazed Window |
| title_sort | quantifying of vision through polymer dispersed liquid crystal double glazed window |
| topic | vision through windows visual comfort PDLC smart film smart windows image processing |
| url | https://www.mdpi.com/1996-1073/15/9/3196 |
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