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Information × Registration Number 0215U000498, 0113U000248 , R & D reports Title Influence the dynamics of operational parameters on the energy efficiency of light sources popup.stage_title Head Tarasenko Mykola Hryhorovych, Registration Date 26-02-2015 Organization Ternopil National Technical Ivan Puluj University popup.description2 The work deals with the development of scientific and technical bases of assessment of light sources and lighting settings' energy efficiency manufactured on their basis. It has been proved that the most reliable, comprehensive and scientifically sound evaluation method of energy efficiency of light sources regardless of physical principles of their functioning is the method based on the assessment of energy efficiency by the specific cost per unit of light energy produced by a light source within an average duration of its luminescence. There has been developed a mathematical model for calculating realistic values of electrical еnergy savings for any functional dependencies of luminous flux light sources regulation, taking into account the power losses in electromagnetic ballast chokes. It has been proved that the dynamics of the transition process of semiconductor light sources' luminous flux decrease from the moment of switching to the moment of transition into a steady mode, as well as within an average duration of glow, is described (with accuracy sufficient for practical purposes) by the difference of decreasing and increasing exponential functions of constants of time and integration of various magnitude, which made it possible: a) to evaluate the contribution of each transient thermal resistance (light emitting diode-radiator, radiator-environment) to the process of the excessive heat transfer from a driver and LEDs to the environment; b) to suggest a method of determining an optimal value of nominal current generated on the basis of LED lighting products in terms of providing a necessary magnitude of an average duration of glow; c) to determine the amount of light energy generated within any pre-specified period of time. Based on the analysis and generalization of the obtained and published experimental data there has been constructed an mathematical model of electrical and lighting parameters of semiconductor light sources in the form of system equations, which made it possible to determine their energy efficiency in the process of luminous flux regulation. There has been introduced the concept of spatial pulsations of the luminous flux It has been proved that a simultaneous decrease of the discharge tube diameter and the current through a fluorescent lamp leads to a significant increase in the relative values of voltage in a lamp (due to the increase of the potential gradient in a positive pillar of discharge) limiting the possibility of manufacturing not only powerful low-pressure discharge lamps, but also the increase of the luminous efficiency and operation in a chain of an industrial network with electromagnetic start-control devices. Product Description popup.authors Карпінський Микола Петрович Коваль Вадим Петрович Козак Катерина Миколаївна Кудряшова Аліса Валеріївна popup.nrat_date 2020-04-02 Close