Lighting and visual comfort performance of commercially available tubular daylight devices

Fernandes, Luís; Regnier, Cynthia

doi:10.1016/j.solener.2023.01.022

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…Providing the desired number of lumens for facilities with large ceilings can be complicated. In a study by [29], the lighting performance of commercially available tubular daylight devices (TDDs) under various conditions was experimentally evaluated. It was found that light levels increased and energy use decreased with solar altitude and TDD diameter.…”

Section: Optimization Strategiesmentioning

confidence: 99%

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Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Higgins,

Ramnarayan,

Family

et al. 2024

Preprint

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A comprehensive Energy Audit of a Maintenance facility was performed to assess its energy performance and identify scope for improvement. The facility’s Energy Use Intensity (EUI) for 2022 was 404 kWh/m2 — more than double the Benchmark EUI for Maintenance facilities (151 kWh/m2) recommended by EnergyStar. Furthermore, the Load Factor for 2022 was 0.22, which is lower than the recommended minimum of 0.75 for an efficient building. The audit encompassed an in-depth evaluation of the building's structural and operational characteristics, comprising HVAC systems, lighting, building envelope, and energy-intensive machinery. An energy model of the building was developed to emulate the baseline building energy performance for 2022. Following the energy model's development and validation, an analysis was conducted to identify energy-intensive areas and opportunities for optimization. Energy Efficiency Measures were then formulated, focusing on improving energy efficiency while focusing on energy consumption reduction and GHG emission reduction. Results demonstrated the potential of Energy Audits and Modeling to enable significant reductions in energy consumption and promote sustainable building practices. Among the Energy Efficiency Measures considered, re-sizing and decarbonizing HVAC equipment contributed the most to energy savings, with a 100% decrease in natural gas and 37% decrease in electricity use annually.

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Section: Optimization Strategiesmentioning

confidence: 99%

“…Using a similar approach, we recommended the installation of TDDs to reduce the load of artificial lighting and maximize the benefits of daylight. The specific diameter of the TDDs installed would need to be designed based on the desired lumens for the space [29].…”

Section: Optimization Strategiesmentioning

confidence: 99%

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Higgins,

Ramnarayan,

Family

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Providing the desired number of lumens for facilities with large ceilings can be complicated. In [40], the lighting performance of commercially available tubular daylight devices (TDDs) under various conditions was experimentally evaluated. It was found that light levels increased, and energy use decreased with solar altitude and TDD diameter.…”

Section: Generalized Energy Efficiency Strategiesmentioning

confidence: 99%

Section: Generalized Energy Efficiency Strategiesmentioning

confidence: 99%

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Higgins,

Ramnarayan,

Family

et al. 2024

Energies

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A comprehensive energy audit of a light rail maintenance facility was performed to assess its energy performance and identify potential scope for improvements. The facility’s energy use intensity (EUI) for 2022 was 404 kWh/m2—more than double the benchmark EUI for maintenance facilities (151 kWh/m2) recommended by EnergyStar. Furthermore, the load factor was 0.22—significantly lower than the recommended minimum of 0.75 for an efficient building. The energy audit encompassed an in-depth evaluation of the facility’s structural and operational characteristics, comprising HVAC systems, lighting, the building envelope, and energy-intensive machinery. An energy model of the facility was developed to emulate the facility’s energy performance in 2022. Following the energy model’s validation, an analysis was conducted to identify opportunities for improving energy efficiency. Post-implementation of energy efficiency measures for the facility, the projected annual reductions are 1086 MWh of electricity, 5034 GJ of natural gas, utility savings of USD 162,402, and net GHG emissions reductions of 584 metric tons of CO2e. A subsequent 30% reduction in EUI to 283.6 kWh/m2 could be achieved with an 86% improvement in load factor, that is, increasing it from 0.22 to 0.41. This study emphasizes the need for energy audits and modeling for maintenance facilities to reduce Scope 1 and 2 emissions.

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Location-specific optimization of free conic dome daylight collector for improved light pipe performance

Sreelakshmi,

Ramamurthy

2024

Building and Environment

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Lighting and visual comfort performance of commercially available tubular daylight devices

Cited by 8 publications

References 29 publications

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Analysis of Energy Efficiency Opportunities for a Public Transportation Maintenance Facility—A Case Study

Location-specific optimization of free conic dome daylight collector for improved light pipe performance

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