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Scartezzini Jean-louis - One of the best experts on this subject based on the ideXlab platform.

  • Characterization of a quasi-real-time Lighting computing system based on HDR imaging
    'Elsevier BV', 2021
    Co-Authors: Wu Yujie, Kaempf Jérôme, Scartezzini Jean-louis
    Abstract:

    In this paper we present the characterization of a calibrated embedded system for quasi real-time Lighting Computation based on HDR sky monitoring. To quantify its accuracy in Lighting Computation, we positioned the device in front of a test module with unilateral-façades to measure the luminance distribution of the sky and ground dome, including that of the sun, the clouds and landscape, followed by on-board illuminance Computation in the device. An experiment was conducted on two representative days, with overcast and clear sky respectively. The embedded device computed the illuminance for 5 virtual sensors which was referred to the measurement by 5 lux-meters at the identical positions synchronously to assess its relative error. Compared with the Perez all-weather sky model, the embedded device was indicated to be more reliable and achieved 10%-25% higher accuracy in transient Lighting Computation of horizontal illuminance based on HDR imaging and luminance mapping

  • Daylight regulated by automated external Venetian blinds based on HDR sky luminance mapping in winter
    'IOP Publishing', 2020
    Co-Authors: Wu Yujie, Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Automated shading systems have the potential to exploit daylight in buildings to save energy of artificial Lighting and cooling loads and improve occupants'f visual comfort. This paper investigates the dayLighting performance of automated Venetian blinds based on sky luminance monitoring and Lighting Computation in winter. 'fIn-situ'f experiments were carried out in a dayLighting test module when the solar elevation angle was 21.7. at noon. Experimental results showed the automated shading was able to maintain work-plane illuminance within [500, 2000] lux range for 88% of the working time under a clear sky and for 83% of the working time under a partly cloudy sky, while mitigating discomfort glare for occupants

  • Split-pane electrochromic window control based on an embedded photometric device with real-time dayLighting computing
    'Elsevier BV', 2019
    Co-Authors: Wu Yujie, Wang Taoning, Lee, Eleanor S., Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time Lighting Computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the dayLighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI[500, 2000] lux, DGP 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies

Wu Yujie - One of the best experts on this subject based on the ideXlab platform.

  • Characterization of a quasi-real-time Lighting computing system based on HDR imaging
    'Elsevier BV', 2021
    Co-Authors: Wu Yujie, Kaempf Jérôme, Scartezzini Jean-louis
    Abstract:

    In this paper we present the characterization of a calibrated embedded system for quasi real-time Lighting Computation based on HDR sky monitoring. To quantify its accuracy in Lighting Computation, we positioned the device in front of a test module with unilateral-façades to measure the luminance distribution of the sky and ground dome, including that of the sun, the clouds and landscape, followed by on-board illuminance Computation in the device. An experiment was conducted on two representative days, with overcast and clear sky respectively. The embedded device computed the illuminance for 5 virtual sensors which was referred to the measurement by 5 lux-meters at the identical positions synchronously to assess its relative error. Compared with the Perez all-weather sky model, the embedded device was indicated to be more reliable and achieved 10%-25% higher accuracy in transient Lighting Computation of horizontal illuminance based on HDR imaging and luminance mapping

  • Daylight regulated by automated external Venetian blinds based on HDR sky luminance mapping in winter
    'IOP Publishing', 2020
    Co-Authors: Wu Yujie, Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Automated shading systems have the potential to exploit daylight in buildings to save energy of artificial Lighting and cooling loads and improve occupants'f visual comfort. This paper investigates the dayLighting performance of automated Venetian blinds based on sky luminance monitoring and Lighting Computation in winter. 'fIn-situ'f experiments were carried out in a dayLighting test module when the solar elevation angle was 21.7. at noon. Experimental results showed the automated shading was able to maintain work-plane illuminance within [500, 2000] lux range for 88% of the working time under a clear sky and for 83% of the working time under a partly cloudy sky, while mitigating discomfort glare for occupants

  • Split-pane electrochromic window control based on an embedded photometric device with real-time dayLighting computing
    'Elsevier BV', 2019
    Co-Authors: Wu Yujie, Wang Taoning, Lee, Eleanor S., Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time Lighting Computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the dayLighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI[500, 2000] lux, DGP 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies

Jl Scartezzini - One of the best experts on this subject based on the ideXlab platform.

  • Split-pane electrochromic window control based on an embedded photometric device with real-time dayLighting computing
    eScholarship University of California, 2019
    Co-Authors: Wu Y, Wang T, Es Lee, Jh Kämpf, Jl Scartezzini
    Abstract:

    © 2019 Elsevier Ltd Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time Lighting Computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the dayLighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI∈[500, 2000] lux, DGP ≤ 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies

Kämpf, Jérôme H. - One of the best experts on this subject based on the ideXlab platform.

  • Daylight regulated by automated external Venetian blinds based on HDR sky luminance mapping in winter
    'IOP Publishing', 2020
    Co-Authors: Wu Yujie, Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Automated shading systems have the potential to exploit daylight in buildings to save energy of artificial Lighting and cooling loads and improve occupants'f visual comfort. This paper investigates the dayLighting performance of automated Venetian blinds based on sky luminance monitoring and Lighting Computation in winter. 'fIn-situ'f experiments were carried out in a dayLighting test module when the solar elevation angle was 21.7. at noon. Experimental results showed the automated shading was able to maintain work-plane illuminance within [500, 2000] lux range for 88% of the working time under a clear sky and for 83% of the working time under a partly cloudy sky, while mitigating discomfort glare for occupants

  • Split-pane electrochromic window control based on an embedded photometric device with real-time dayLighting computing
    'Elsevier BV', 2019
    Co-Authors: Wu Yujie, Wang Taoning, Lee, Eleanor S., Kämpf, Jérôme H., Scartezzini Jean-louis
    Abstract:

    Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time Lighting Computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the dayLighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI[500, 2000] lux, DGP 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies

Wu Y - One of the best experts on this subject based on the ideXlab platform.

  • Split-pane electrochromic window control based on an embedded photometric device with real-time dayLighting computing
    eScholarship University of California, 2019
    Co-Authors: Wu Y, Wang T, Es Lee, Jh Kämpf, Jl Scartezzini
    Abstract:

    © 2019 Elsevier Ltd Well-designed electrochromic (EC) glazing control can improve the energy performance of buildings and visual comfort of occupants in highly glazed buildings. This paper designed and demonstrated a compact integrated EC glazing automation system to control tint states of a split-pane EC window according to variations of sky conditions. The control is based on monitoring the luminance distribution of the sky and real-time Lighting Computation for a building interior, using an embedded photometric device (EPD). It optimizes tint states of EC glazing to offer sufficient daylight provision and temper discomfort glare for occupants, which potentially mitigates excessive solar heat gain. ’In-situ’ experiments were conducted in a full-scale testbed to demonstrate the dayLighting performance under various sky conditions. Experimental results showed 83% of the working time for work-plane illuminance (WPI) and 95% of the time for daylight glare probability (DGP) were constrained in comfort range (WPI∈[500, 2000] lux, DGP ≤ 0.35) by the automated EC glazing (controlled by EPD) under clear skies; 68% of the time for WPI and 94% of the time for DGP in confined range under clear skies with thin clouds; 62% of the time for WPI and 85% of the time for DGP in confined range under partly cloudy skies