The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Danny H W Li - One of the best experts on this subject based on the ideXlab platform.
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an analysis of dayLighting and solar heat for cooling dominated office buildings
Solar Energy, 1999Co-Authors: Danny H W LiAbstract:Computer simulation techniques were used to assess the energy performance of a generic commercial office building in Hong Kong. The simulation tool was DOE-2.1E. The thermal and energy performance of dayLighting schemes were analysed in terms of the reduction in electric Lighting Requirement and the cooling penalty due to solar heat. Regression analysis was conducted to correlate the peak electricity demand and annual incremental electricity use with two fenestration variables, namely the solar aperture and the dayLighting aperture. Contours of equal annual incremental electricity use were shown to be a function of the solar and dayLighting apertures. It is envisaged that these simple charts can be a useful design tool for architects and engineers to assess the relative energy performance of different fenestration designs, particularly during the initial design stage when different building design schemes and concepts are being considered and developed.
Saffa Riffat - One of the best experts on this subject based on the ideXlab platform.
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evaluation of a large dish type concentrator solar Lighting system for underground car park
International Journal of Energy Research, 2018Co-Authors: Duofu Song, Jun Liao, Wenjuan Huang, Sihao Huang, Chunfu Cheng, Huiliang Zhou, Saffa RiffatAbstract:To utilize solar energy more efficiently and reduce Lighting power consumption in underground public spaces such as car park, a large dish-type concentrator solar Lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin film coating and thin film solar cells onto the dish reflector. The collected sunlight is split into two parts, one being reflected into a fibre optical bundle (FOB) and transmitted for dayLighting while the rest being absorbed by solar cells for electricity generation as other way to replenish dayLighting. A set of four solar Lighting system using 3.28m diameter dish are designed to meet the Lighting Requirement in a 17712munderground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by Lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 lx and 284 lx on 25 February 2016, and between 62.7 lx and 353 lx on 17 August 2016 for two chosen days respectively. For the presented design, the electricity produced by solar cells is just enough to power light emitting diodes (LEDs) for Lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of LEDs, the hybrid solar Lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient Lighting provision can be provided by the proposed large dish-type concentrator solar Lighting system for applications in underground car park.
Zhu Qiusheng - One of the best experts on this subject based on the ideXlab platform.
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a brief talk on the Lighting Requirement of high definition television
Entertainment Technology, 2010Co-Authors: Zhu QiushengAbstract:According to the characteristics of program for HDTV,the Requirements of high def inition on TV Lighting and stage art factors closely associated with Lighting were presented in the paper.
Duofu Song - One of the best experts on this subject based on the ideXlab platform.
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evaluation of a large dish type concentrator solar Lighting system for underground car park
International Journal of Energy Research, 2018Co-Authors: Duofu Song, Jun Liao, Wenjuan Huang, Sihao Huang, Chunfu Cheng, Huiliang Zhou, Saffa RiffatAbstract:To utilize solar energy more efficiently and reduce Lighting power consumption in underground public spaces such as car park, a large dish-type concentrator solar Lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin film coating and thin film solar cells onto the dish reflector. The collected sunlight is split into two parts, one being reflected into a fibre optical bundle (FOB) and transmitted for dayLighting while the rest being absorbed by solar cells for electricity generation as other way to replenish dayLighting. A set of four solar Lighting system using 3.28m diameter dish are designed to meet the Lighting Requirement in a 17712munderground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by Lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 lx and 284 lx on 25 February 2016, and between 62.7 lx and 353 lx on 17 August 2016 for two chosen days respectively. For the presented design, the electricity produced by solar cells is just enough to power light emitting diodes (LEDs) for Lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of LEDs, the hybrid solar Lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient Lighting provision can be provided by the proposed large dish-type concentrator solar Lighting system for applications in underground car park.
Huiliang Zhou - One of the best experts on this subject based on the ideXlab platform.
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evaluation of a large dish type concentrator solar Lighting system for underground car park
International Journal of Energy Research, 2018Co-Authors: Duofu Song, Jun Liao, Wenjuan Huang, Sihao Huang, Chunfu Cheng, Huiliang Zhou, Saffa RiffatAbstract:To utilize solar energy more efficiently and reduce Lighting power consumption in underground public spaces such as car park, a large dish-type concentrator solar Lighting system is put forward along with its evaluation, which is a unique design to apply a laminated layer of beam split thin film coating and thin film solar cells onto the dish reflector. The collected sunlight is split into two parts, one being reflected into a fibre optical bundle (FOB) and transmitted for dayLighting while the rest being absorbed by solar cells for electricity generation as other way to replenish dayLighting. A set of four solar Lighting system using 3.28m diameter dish are designed to meet the Lighting Requirement in a 17712munderground car park. A mathematical model is adopted to calculate the output power and conversion efficiency of solar cells distributed on the parabolic dish surface. The indoor illuminance distribution is given by Lighting simulation. The results indicate that the average daylight illuminance in the car park can vary between 62.7 lx and 284 lx on 25 February 2016, and between 62.7 lx and 353 lx on 17 August 2016 for two chosen days respectively. For the presented design, the electricity produced by solar cells is just enough to power light emitting diodes (LEDs) for Lighting meeting a criterion at night. Considering about 19% conversion efficiency of solar cells and the efficacy of 129.5 lm/W of LEDs, the hybrid solar Lighting system can have about 40% utilization ratio of solar energy, so it can be concluded that a sufficient Lighting provision can be provided by the proposed large dish-type concentrator solar Lighting system for applications in underground car park.