Lumen degradation effect on fluorescent-to-LED switching: techno-economic viability for a lecture room
- PDF / 1,272,100 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 36 Downloads / 157 Views
ORIGINAL PAPER
Lumen degradation effect on fluorescent‑to‑LED switching: techno‑economic viability for a lecture room Assetbek Ashirbekov1 · Tamerlan Srymbetov1 · Dinara Dikhanbayeva1 · Luis Rojas‑Solórzano1 Received: 2 January 2020 / Accepted: 10 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Efficient illumination of classrooms is one of many technologies that can help in constructing a cleaner future and have a positive environmental impact. However, the long-term economic plan of their implementation must still be created and validated. One promising technology is light-emitting diodes (LEDs) that have a low carbon footprint compared to conventional lighting sources. However, different studies barely mention lumen degradation, which is reduction in the illumination capacity throughout LEDs’ lifetime. This paper investigates whether it is economically viable to switch fluorescent lamps to LED lamps while considering lumen degradation of both technologies, by considering the study case to be a classroom of a Kazakhstani university. The performance assessment was based on life-cycle cost analysis (LCCA). The required luminosity level, model lifetime (13 years) and classroom layout were the same for both technologies. The software RETScreen was used to develop the energy model and LCCA and the risk assessment of financial parameters. Simple and equity payback periods were found to be less than half of model lifetime with the internal rate of return reaching 20% and the electrical energy expenses decreasing by 10.95 kWh per year per m2 of the classroom, i.e., over 35%. The greenhouse gases (GHG) emissions dropped by 4.38 kgCO2 eq. per year per m 2 of the classroom, which is over 30%. This analysis supports the advantages of using LEDs instead of fluorescent lamps, as a financially favorable decision that also reduces GHG emissions despite the high lumen deterioration of LEDs. Graphic abstract
Extended author information available on the last page of the article
13
Vol.:(0123456789)
A. Ashirbekov et al.
Keywords LED · Lighting · Lumen depreciation · GHG emissions · Life-cycle cost analysis · RETScreen
Introduction The reduction of energy consumption is an essential part of clean energy technologies and strategies, as every bit of reduction cuts off the need for energy from the grid, which is mostly produced via fossil fuel burning in the majority of countries, including Kazakhstan. Following the idea of clean energies, one of the significant assessments for transitioning to energy-efficient lighting in Kazakhstan was made by the United Nations Environment Programme (United Nations Environment Programme 2010). The switch of total country lightings to energy-efficient lamps resulted in almost 178 million USD annual savings during the payback period of 6 months. In addition, the environmental impact was positive as there was an annual reduction of 2.1 million tCO2 eq. (equivalent amount of C O2) greenhouse gases (GHG) emissions. The new initiative named “Brighten up
Data Loading...
