Circular Economy Aspects Regarding LED Lighting Retrofit—from Case Studies to Vision

Beu, Dorin; Ciugudeanu, Calin; Buzdugan, Mircea

doi:10.3390/su10103674

Cited by 15 publications

(8 citation statements)

References 14 publications

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“…The classical linear economy is based on the manufacture of short-lived products, planned obsolescence, economies of scale, and the consequent growing consumer demand for new products. While the CE is based on the consideration of the negative externalities that the consumption of resources originates [9]. Therefore, CE is focused on how to avoid, minimize, restore, and/or compensate stakeholders [39,40].…”

Section: The Conceptualization Of Circular Supply Chainmentioning

confidence: 99%

“…However, the application of the principles of the circular economy to the functioning of the supply chain, requires organizations to redesign their chains under a new approach [8]. The circular economy (CE) is an alternative paradigm to the current and dominant production model called "take-make-waste-dispose" [9][10][11][12] that causes a high amount of waste and an inability to regenerate the resources used. Therefore, CE can be considered an attempt to respond to a productive system based on the incessant development of economies of scale that will enable a continuous and growing demand for new products and services to be satisfied.…”

Section: Introductionmentioning

confidence: 99%

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Main Dimensions in the Building of the Circular Supply Chain: A Literature Review

et al. 2020

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Circular economy is an alternative to the traditional production model and has therefore attracted a great deal of attention from researchers. The change in the production system is accompanied by new logistical needs related both to resources and waste and to the distribution and recovery of products. The circular supply chain involves return processes and the manufacturer intends to capture additional value in the supply chain. In this paper, value chains have been mapped to visualize the links and interactions between the different stages and actors to understand the complexities of these systems and to make informed decisions. For this reason, and based on thorough literature review, the final objective of this work is to achieve a conceptual framework to study circular supply chain, which uses the main theoretical perspectives in strategic management literature. Four dimensions have been identified to support the development of these new supply chains—greater intensity in the relationships established in the supply chain, adaptation of logistics and organizational, disruptive and smart technologies, and a functioning environment. It can be concluded that to develop a new relationship capacity will allow for reaching more frequent, closer relationships with more actors. These relationships will be developed within an adapted organizational and logistical framework that is framed in new business model archetypes. However, dimensions related to the business environment such as sectoral, legislative, and fiscal frameworks must be incorporated.

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Section: The Conceptualization Of Circular Supply Chainmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Main Dimensions in the Building of the Circular Supply Chain: A Literature Review

et al. 2020

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“…Even more importantly, our focus on light pollution misses a number of crucial questions related to the sustainability of LED lifecycles. These questions concern the exploitation and recycling of raw materials and the sustainability of value and production chains [72][73][74].…”

Section: Conclusion: the Dilemma Behind The Led Paradoxmentioning

confidence: 99%

The LED Paradox: How Light Pollution Challenges Experts to Reconsider Sustainable Lighting

et al. 2019

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In the 21st century, the notion of “sustainable lighting” is closely associated with LED technology. In the past ten years, municipalities and private light users worldwide have installed light-emitting diodes in urban spaces and public streets to save energy. Yet an increasing body of interdisciplinary research suggests that supposedly sustainable LED installations are in fact unsustainable, because they increase light pollution. Paradoxically, blue-rich cool-white LED lighting, which is the most energy-efficient, also appears to be the most ecologically unfriendly. Biologists, physicians and ecologists warn that blue-rich LED light disturbs the circadian day-and-night rhythm of living organisms, including humans, with potential negative health effects on individual species and whole ecosystems. Can the paradox be solved? This paper explores this question based on our transdisciplinary research project Light Pollution—A Global Discussion. It reveals how light pollution experts and lighting professionals see the challenges and potential of LED lighting from their different viewpoints. This expert feedback shows that “sustainable LED lighting” goes far beyond energy efficiency as it raises complex design issues that imply stakeholder negotiation. It also suggests that the LED paradox may be solved in context, but hardly in principle.

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“…Using the university adopted lighting retrofit solutions as case studies, circular economy aspects were identified [13]. For a LED retrofitted recessed luminaire T8 4 × 18 W, a previous study [14], showed a major reduction of installed power as well as a correct lighting distribution, but also revealed some issues: lack of certification of the retrofit luminaire, the necessity of utilizing qualified personnel, high workforce costs, etc. Based on the global International Energy Agency (IEA) data, the lighting electricity consumption of commercial buildings in 2005 [12] was about 25 kWh/sq.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Lighting-Retrofit Versus Dedicated Luminaires-Light Versus Power Quality

et al. 2019

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For the next few years millions of fluorescent luminaires will become waste and will be replaced by light-emitting diodes-LED luminaires. According to the Cost European Cooperation in Science & Technology Program, the next step will be shifting from sustainability to regeneration (enabling social and ecological systems to maintain a healthy state and to evolve); to reach this point, a is circular economy becomes necessary. The Technical University of Cluj-Napoca's Lighting Engineering Laboratory-LEL-is the main lighting independent consultant in Transylvania (the north-west region of Romania). For the Building Services Faculty, LEL adopted different energy efficient lighting solutions to replace existing fluorescent T8 luminaires. The best available techniques were evaluated over the last few years. Out of a range of different smart lighting control systems, LED were chosen and used for retrofitting the existing T8 luminaires or simply replacing them with new dedicated LED luminaires. The study analyzed five different lighting setups for upgrading the existing fluorescent T8 2*36W luminaires. One setup used T5 lamps and the others used retrofitted or dedicated LED lighting solutions. First the lighting quantities of each setup were evaluated under real and experimental conditions. Second, a programable power source was used for measuring power quality indicators corelated with the provided lighting outputs, under different voltage values and waveforms. For each lighting setup, an even and odd current harmonic limit check was performed in line with class C-lighting equipment, IEC 61000-3-2 requirements. A new energy efficiency and power quality indicator was proposed-the lighting apparent power density [VA/sq.m/100lx].Sustainability 2019, 11, 7125 2 of 15 halide lamps) need to be collected separately, due to their mercury content (a hazardous and water contaminant material).Worldwide, over the next few years, millions of fluorescent luminaires will become waste and will be replaced by LED luminaires. This has already occurred in some western and north European countries. Society is presently guided by a lighting linear economy-where all existing luminaires became waste and are replaced by new dedicated LED luminaires.Luminaries are generally nonlinear loads connected to the low voltage AC distribution network. Some light sources, like fluorescent lamps and LEDs, require a power supply system (ballast or driver) to interface them with the electric network. Generally, the current waveform contains some amount of distortion, depending on the luminaries' technology [7].However, as LEDs continue to replace incandescent and fluorescent lighting, there can be a significant impact on power distribution networks due to the non-linear nature of light emitting diodes. This paper will investigate the main power quality concerns arising from the use of LED lighting on our electrical networks. Further, it will also assess the impact of power quality disturbances on LED lighting technology [8].The Technical University of Cluj-Na...

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Circular Economy Aspects Regarding LED Lighting Retrofit—from Case Studies to Vision

Cited by 15 publications

References 14 publications

Main Dimensions in the Building of the Circular Supply Chain: A Literature Review

Main Dimensions in the Building of the Circular Supply Chain: A Literature Review

The LED Paradox: How Light Pollution Challenges Experts to Reconsider Sustainable Lighting

Sustainable Lighting-Retrofit Versus Dedicated Luminaires-Light Versus Power Quality

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