An Engineering Approach for the Qualitative Assessment of the Luminous Flux of Led Lamps

Kayumov, Damir; Bulatbaev, F. N.; Kayumova, Ilmira; Breido, Josef; Bulatbayeva, Yulia

doi:10.1615/interjenercleanenv.2022043776

Cited by 4 publications

(4 citation statements)

References 28 publications

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“…The results obtained in this paper are relevant and scientifically significant for a number of areas of modern science, particularly for the development of theoretical ideas about the quantum mechanisms of the formation of the ferroelectric state due to the tunnel motion of protons in the hydrogen sublattice of KDP, DKDP crystals, which are of significant practical importance for laser technology (regulators of radiation parameters), nonlinear optics and optoelectronics (electro-optical sensors, strain sensors of hard rocks and building materials, machine parts and mechanisms, etc.) [45][46][47][48][49][50][51][52][53][54], and information technology (thinfilm ferroelectric elements of microcircuits for high-speed, non-volatile storage devices with an abnormally long time maintaining the residual polarization (up to 10 years)) [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Kalytka,

Baimukhanov,

Neshina

et al. 2023

Applied Sciences

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Using the quasi-classical kinetic theory of dielectric relaxation, in addition to existing methods, fundamental mathematical expressions are built, which make it possible to more strictly consider the effects of the main charge carriers’ (protons’) tunneling on the numerical values of the molecular parameters (activation energy, equilibrium concentration) of protons in HBC. The formulas for calculating the statistically averaged non-stationary quantum transparency of a parabolic potential barrier for protons have been modernized by more stringent consideration of the effects of corrections caused by an external electric field. For the model of a double-symmetric potential well, a generalized nonlinear solution of the quasi-classical kinetic equation of dielectric relaxation in HBC was built. The phenomenological Bucci-Rive formula for thermally stimulated depolarization current density (TSDC) was first investigated, taking into account quantum transparency, for the case of a parabolic potential barrier. The choice of the parabolic shape of the potential barrier allowed, at a theoretical level, for the mathematical model of relaxation polarization to be brought closer to the conditions of the real spatial structure of the crystal potential field, in comparison with the rectangular potential barrier model. It has been found that quantum effects due to proton tunnel transitions significantly affect the mechanism of thermally stimulated depolarization currents in HBC, over a wide temperature range (50–550 K) and external field parameters (0.1–1 MV/m). Generalized solutions of the nonlinear kinetic equation, recorded considering the effects of field parameters on proton tunnel transitions, made it possible to significantly approximate the theoretical values of activation energies, equilibrium concentrations of protons and amplitudes of the theoretical maxima of the current density of thermally stimulated depolarization, according to their experimental values in the field of low-temperature (50–100 K) and high-temperature (350–550 K) maxima of TSDC density in HBC. For the first time, precision measurements of TSDC temperature spectra were carried out for chalcanthite crystals. The effects of alloying impurities concentrations and crystal calcination temperatures on the parameters of experimental maxima in the TSDC spectrum of chalcanthite were established. A physical mechanism of the quantum tunnel motion of protons in HBC with a complex crystal structure (crystalline hydrates, layered silicates, ferroelectric HBC (KDP, DKDP)) is described. The patterns found in this article indicate a fairly high degree of applied scientific significance for the obtained theoretical results, allowing for the further development of electrophysics and optoelectronics of heterogeneous structures (MIS, MSM) based on proton semiconductors and dielectrics (PSD) and their composites.

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Section: Discussionmentioning

confidence: 99%

“…[45][46][47][48][49][50][51]. Fiber-optic strain sensors based on KDP and related crystals are promising [52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Kalytka,

Baimukhanov,

Neshina

et al. 2023

Applied Sciences

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“…The use of better ones cares more about the environment. Thus, the simple method to evaluate the quality of the light-emission diode lightings with similar parameters, proposed by Kayumov et al (2023), is in high demand. We believe this is an interesting and useful approach.…”

Section: Engineering Approachmentioning

confidence: 99%

Environmental Engineering, Innovations, and Management. Editorial Review

Kuzmin

Pinchuk

2023

Inter J Ener Clean Env

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In recent years, special attention has been paid to environmental safety in various fields of application. Among all human activities, applications related to energy are always in high demand. At the same time, many of them affect climate change and can lead to biodiversity degradation and other environmental problems. The International Journal of Energy for a Clean Environment is a periodical that publishes high-quality research on the intersection of energy and the environment. The current issue of the journal presents the results obtained by researchers from different countries and different fields of research, devoted to some points in the field of energy and environmental management.

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“…The concept of energy efficiency in outdoor lighting systems has become increasingly significant in recent years due to users' growing demands [3] and governments' necessity to allocate energy resources appropriately [4]. The commitment to environmental stewardship, greenhouse gas reduction, waste minimization and proper disposal has led to an evolution in the lighting system components [5].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency in Public Lighting Systems Friendly to the Environment and Protected Areas

Velásquez,

Espín,

Castro

et al. 2024

Sustainability

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Solid-state lighting technology, such as LED devices, is critical to improving energy efficiency in street lighting systems. In Ecuador, government policies have established the obligation to exclusively use LED systems starting in 2023, except in special projects. Ecuador, known for its vast biodiversity, protects its national parks, which are rich in flora, fauna and natural resources, through international institutions and agreements such as UNESCO, CBD and CITES. Although reducing electrical consumption usually measures energy efficiency, this article goes further. It considers aspects such as the correlated color temperature in the lighting design of protected areas, light pollution and the decrease in energy quality due to harmonic distortion. Measurements of the electromagnetic spectrum of the light sources were made in an area in the Galápagos National Park of Ecuador, revealing highly correlated color temperatures that can affect ecosystem cycles. In addition, the investigation detected levels of light pollution increasing the night sky brightness and a notable presence of harmonic distortion in the electrical grid. Using simulations to predict the behavior of these variables offers an efficient option to help preserve protected environments and the quality of energy supply while promoting energy savings.

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An Engineering Approach for the Qualitative Assessment of the Luminous Flux of Led Lamps

Cited by 4 publications

References 28 publications

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Influence of Quantum Effects on Dielectric Relaxation in Functional Electrical and Electric Energy Elements Based on Proton Semiconductors and Dielectrics

Environmental Engineering, Innovations, and Management. Editorial Review

Energy Efficiency in Public Lighting Systems Friendly to the Environment and Protected Areas

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