Open AccessEco-friendly sun lamp for railway facilities
Author(s) -
V. F. Lapshin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2131/4/042092
Subject(s) - gas discharge lamp , luminous flux , sodium vapor lamp , plasma , electric discharge in gases , color rendering index , radiation , gas filled tube , materials science , incandescent light bulb , combustion , electric discharge , nuclear engineering , optics , optoelectronics , chemistry , voltage , physics , phosphor , light source , electrode , quantum mechanics , organic chemistry , engineering
The paper considers the possibility of using a pulsed discharge in cesium as an environmentally friendly high quality light source for lighting industrial premises of railway transport facilities. The use of cesium filling of standard sapphire burners of high-pressure sodium lamps and a pulsed mode of electric power supply of the discharge to create a light source has been substantiated. A mathematical model of a high-pressure pulsed discharge in cesium is formulated on the basis of the radiative gas dynamics equations. The discharge was simulated and it was shown that it is possible to create a plasma with a temperature 4000 -7000 K and a pressure of 0.5 - 1.5 at m with the power supplied to the discharge ∼ 100 W/cm in the steady-state combustion mode. The dependence of the discharge lighting characteristics on the amplitude of the current pulses and the amount of cesium in the gas discharge tube is analyzed. It is shown that in a wide range of currents and plasma densities, the color rendering index of the discharge radiation Ra> 95 with luminous efficacy η V ∼ 70lm/W and more. The average luminous flux emitted per unit length of the discharge column is ∼ 10 4 lm/cm. The color temperature of the discharge radiation can vary over a wide range of values T c ∼ 3000÷4500 K. It is shown that the color coordinates X c ,Y c of discharge radiation are close to the values X c ,Y c of a blackbody. The use of such a source in conditions of a short daylight hours will make it possible to create practically solar illumination of large production areas.