Laboratory Validation of Integrated Lighting Systems Retrofit Performance and Energy Savings

Abstract

<jats:p>Light-emitting diodes (LED) fixtures and lamps have emerged as leading technologies for general illumination and are a well-established energy efficiency retrofit measure in commercial buildings (from around 2% of installed fixtures and lamps in 2013 to 28% by 2020). Retrofit approaches that integrate elements, such as networked controls, daylight dimming, and advanced shade technologies lag in comparison. Integrated retrofits have been shown to increase savings over single end-use retrofits, but are perceived as higher complexity and risk. More validation of integrated lighting system performance is needed. This study presents results from laboratory testing of three packages combining fixtures, networked controls, task tuning, and daylight dimming, advanced shades, and lighting layout changes. We characterize performance in perimeter open-office zones, finding energy savings from 20% for daylight dimming and automated shades (no LED retrofit) to over 70% for LED retrofits with advanced controls and shades or lighting layout changes. We present some implementation details, including lessons learned from installation and commissioning in the laboratory setting. We also discuss cost-benefit analysis approaches for the types of packages presented, including the need to quantify and incorporate energy and non-energy benefits for advanced shades packages, which enhance occupant comfort but add significant cost.</jats:p>

Real time side-by-side experimental validation of energy and comfort performance of a zero net energy retrofit package for small commercial buildings

“…Mathew et al evaluate a retrofit package aimed at specific points in the real estate life cycle that centered around lighting and HVAC, with the optional addition of ceiling fans, automated shading and some plug load controls, achieving a combined savings of 33-40% (Mathew et al, 2020). Shackelford et al studied integrated lighting and shading system retrofits, achieving up to 70% energy savings (Shackelford et al, 2020). So far, the physical layout of these experiments mimicked a typical open-plan office configuration, with a focus towards medium and large office buildings.…”

Energy Efficiency Package for Tenant Fit-Out: Laboratory Testing and Validation of Energy Savings and Indoor Environmental Quality

“…We focused on medium-to-larger scale fit-outs in which scope included lighting and HVAC controls that are within the tenant's purview. Prior research has shown that integrated approaches that address multiple end uses have the potential to create deeper savings than component-based approaches (see, for example, Reference [11,24]). Finally, we screened the measures for the extent to which they could be standardized and likely adopted.…”

“…The package also includes continuous metering and monitoring as a core element. multiple end uses have the potential to create deeper savings than component-based approaches (see, for example, Reference [11,24]). Finally, we screened the measures for the extent to which they could be standardized and likely adopted.…”

Integration of Natural and Artificial Light:

“…Although there is a variety of methods, some authors prefer the field measurement method because of its accuracy (DEMIRBAŞ et al, 2016;GENTILE;LAIKE;DUBOIS, 2016;KUNWAR et al, 2020;SU, 2015b) whether in real, scale or laboratory environments (ACOSTA et al, 2018;SHACKELFORD et al, 2020). Other authors have decided for modelling and simulation due to the possibility of evaluating and proposing different scenarios (CHOI et al, 2016).…”