Use Of Light Emitting Diode Lamps Research Articles

LAMP MODIFICATION FROM HPLN TO LED TECHNOLOGY FOR SAVING ELECTRICAL ENERGY IN STREET LIGHTING

Energy Efficiency is a business that is carried out with the aim of reducing the amount of energy needed, in using an equipment or even an energy-related system. In its development in the field of lighting, LED (Light Emitting Diode) lamps are now starting to be used as lighting lamps for homes, industries and factories. In Indonesia, the use of LED lamps in lighting is still rarely used, because the price of LED lamps is quite expensive when compared to ordinary lamps. With the saving of electric power through the use of LED lights, the problem of operational costs will be easy to overcome. Indeed, the price of this LED lamp is a little expensive, but with the research on the comparison of the use of this LED lamp with HPL-N type lamps, the industry will consider using this LED lamp with a generally accepted application method to reduce energy expenditure. The previous conditions for Jalan Dolok Merawan used HPLN 250 Watt lamps with a handlebar angle of 24,920 ornaments, the resulting light intensity was 2189 Candela, the intensity of the resulting lighting was 97.94 Lux and has now been changed to make it more optimal to use 120 Watt LED type lights, the height of the pole used is 4 meterss with an ornament handlebar angle of 24.920, light intensity of 1242 Candella, lighting intensity of 55.33 lux. The results of this illumination intensity are in accordance with the standard determined by BSN SNI regarding Collector road class 3-7 Lux. The results achieved after the process of modifying HPL-N lamps to LEDs are that they can reduce the use of electrical energy in the lighting system and achieve efficiency for electric power consumption so that they can provide added value to the company in reducing the company's operational costs.

The effectiveness of light emitting diode (LED) lamps in the offshore purse seine fishery in Vietnam

Fishing with artificial light has become one of the most advanced, efficient, and common methods for the night-time purse seining in Vietnam. This study evaluated the radiation spectrum, CIE chromaticity coordinates, correlated color temperature (CCT), catch rate, fuel consumption, and CO2 emissions when using Light emitting diode (LED) lamps (0.196 kW) in comparison with the use of metal halide (MH) lights (1 kW) in the offshore purse seine fishery in Quang Tri province, Vietnam. The fishing efficiency of the purse seine fishing boats using LED lamps has increased 1.58 times in catch rate than MH lights, although the energy consumption of LED lamp is 4 times smaller. Fuel consumption of boats per trip using LED lamps was one third of that using MH lights. The use of LED reduced the radiation spectrum, especially the intense UV radiation which negatively affects the health of fishermen. This study also showed the potential of CO2 emission reduction up to 1.09 tons of CO2 per trip per boat from the use of LED lamps in the offshore purse seine fishing boats.

Working environment of tritium analysis for photoluminescence control

The conventional tritium analysis process using a liquid scintillation counter (LSC) requires over 24 h of waiting time to reduce the interference from the luminescence of the sample cocktail. The working efficiency of tritium measurement using an LSC worsens as the waiting time for luminescence decay increases. We hypothesize that this waiting time can be shortened by using light-emitting diode (LED) lamps as lighting equipment in a measurement laboratory because the emission spectra of some LED lamps contain no ultraviolet rays. Thus, a sample cocktail was prepared under an LED lamp. The count rate of this cocktail was reduced to the background of the LSC (ca. 3 cpm) within several hours. By contrast, the luminescence of a cocktail placed under daylight took approximately 100 h to decay. Therefore, the use of LED lamps is effective for luminescence control and shortening the waiting time in a measurement process.

Harmonic Testing Analysis of Light Emitting Diode (LED) Lamps based SNI IEC 61000-3-2 Standard

The use of LED lamps in Indonesia has increased since 2013 because of low power consumption and high efficiency. LED lamps are non-linear loads that cause harmonic distortion in the electric power system. Harmonic distortion can impact to overheating in magnetic core electrical equipment. Therefore, it is necessary to standardize the limits of the harmonic emission limits of LED lamps. In this study, the harmonics measurements of LED lamps of 22 samples from 10 brands, which include different types of EMI filters in the LED drivers, are carried out to analyze harmonic currents. Measurements in this study conducted using Teseq ProfLine 2105. The results of parameter testing of third and fifth-order harmonic currents, peak current phase angle, beginning current flow at 60 degrees, and end current at 90 degrees were analyze based on the criteria for class C SNI IEC 61000-3-2 standard. The results showed that the three samples used EMI filter inductor in the LED driver can minimize third-order harmonic currents and comply with all parameters.

Impact of Nonlinear Lighting Loads on the Neutral Conductor Current of Low Voltage Residential Grids

In the last decade, mainly due to political incentives towards energy efficiency, the share of lamps with power electronic interfaces, like Compact Fluorescent Lamps (CFL) and Light Emitting Diode (LED) lamps, has significantly increased in the residential sector. Their massive use might have a substantial impact on harmonic currents and, consequently, on the current flowing in the neutral conductor. This paper analyzes the impact of modern energy-efficient lighting technologies on the neutral conductor current by using a synthetic Low Voltage residential grid. Different load scenarios reflecting the transition from incandescent lamps, via CFL, to LED lamps are compared concerning the neutral conductor current at different points in the network. The inherent randomness related to the use of lighting devices by each residential customer is considered employing a Monte Carlo simulation. Obtained results show that the use of CFL has a greater impact on the neutral conductor current of Low Voltage (LV) residential grids and that, with increasing use of LED lamps, a decreasing impact can be expected in the future.

A study on household energy-use patterns in rural, semi-urban and urban areas of Nepal based on field survey

Energy use is required for securing a certain living standard. Availability of energy sources, electricity in particular, is the basic requirement for the quality of living. The rationality of household energy use is not only for improving individual living conditions, but also for the economic growth of a nation. To formulate the national energy strategy plan, it is important to know the current energy use and availability conditions. This study describes the current state of household energy use available from related papers and also from a field survey on household energy use including electricity use. We have collected the data in the form of electricity bills, family income, family size, the number of electric appliances, and energy use for lighting, cooking, heating and cooling from 442 households in Kalikot, Chitwan and Kathmandu districts of Nepal. The monthly rate of firewood use was found 2.08 GJ/household/month in rural areas, which is quite higher than other developing countries. The average electricity use of all areas in Nepal was 2.06 GJ/household/year, which is quite low compared to developed and even other developing countries. The electricity is used mainly for lighting purpose in the rural area, while it was also used to run other electric appliances in semi-urban and urban areas. By analyzing the data, it was found that the amount of electricity use was a function of household income level, occupation, family size and educational level of household responsible person. The educational level of people was correlated to the use of light-emitting diode lamps. The result of this series of survey should be useful for future planning of household energy management in the Nepalese society.

Ефективність використання світлодіодів для клонального мікророзмноження батату та м’яти перцевої в культурі in vitro

The purpose. To determine efficiency of application of state-of-the-art LED-systems for clonal microreproduction in crop in vitro of individually selected, with high biochemical parameters of clones of sweet potato and peppermint. Methods. Methods of cultures of organs and tissues — culture of somatic tissues and cells, clonal microreproduction, measuring-weight, mathematical-statistical. Results. At use of light-emitting diode lamps of red and dark blue colors in tubed plants they observed increase of average length of shoot: for peppermint — on 31,2%, for sweet potato — on 10,6 % in comparison with control alternative (cultivation under luminescent lamps). The maximum multiplication ratio of peppermint has provided genotype M.r-17/4 — 7,5±0,6 pieces (control) and 7,9±0,6 pieces — cultivation under LED-lamps. At plants of sweet potato cultivated under light-emitting diode lamps owing to augmentation of length of internodes from 5,2 mm (control) to 6,7 mm the multiplication ratio has increased from 5,5 (control) to 5,8 pieces. Application of light-emitting diode lamps of red and dark blue colors for tubed clones of peppermint and sweet potato has provided tall multiplication ratio of perspective for selection and seeds growing of genotypes of well crops. Spectral make-up of light-emitting diodes according to biological features of crop and stage of morphogenesis requires the further optimization. Conclusions. Use of light-emitting diode lamps of red and dark blue colors placed on light-emitting diode tape in combination 2 1, provides necessary illuminance for growth of plants of tubed clones of peppermint and sweet potato at the stage of their mass reproduction and reduces expenses for the electric power for 62,5 %.

LED lamp modelling for harmonic studies in distribution systems

Energy saving policies have boosted the use of light emitting diode (LED) lamps in distribution networks. These lamps are non-linear loads which inject harmonic currents into the distribution system, which has led to a decrease in the system power quality. Study of the modelling of these lamps would allow the prediction of harmonic emissions into distribution systems. This study presents a frequency-domain LED lamp model for harmonic emission calculation, together with a simple estimation procedure for model parameter determination from experimental measurements. Both were validated by laboratory tests. Finally, an application illustrates the effect of widespread use of LED lamps in a typical distribution system and allows LED lamp models to be compared.

A Facility Lighting Comparison Based on Energy Savings and Efficiency, Pollution Prevention and Life Cycle Assessment

<p class="emsd-body">The objective of this study is to compare the energy efficiency, potential energy savings and the environmental impact among different lighting types-incandescent lamps, CFL (compact fluorescent light) lamps and LED (light-emitting diode) lamps in a manufacturing facility. Three different tools were applied: Energy Assessment Spreadsheet (EAS), Pollution Prevention (P2) tool and GaBi 6. EAS was used to calculate the energy savings, P2 tool was used for carbon footprint analysis, and GaBi was used for the life cycle assessment (LCA) in lightings’ use phase. The results indicated a saving of over $21,000 and a reduction of 151 MT CO<sub>2</sub>e (metric tons of CO<sub>2</sub> equivalents) greenhouse gases (GHGs) using CFL in comparison to incandescent lamps. Approximately, $24,000 could be saved and 170 MTCO<sub>2</sub>e of GHGs could be reduced by using LED lamps instead of incandescent lamps every year for the operation phase of the facility. The environmental impact categories identified from the LCA in lighting use phase indicated that using incandescent lamps for the facility was much more harmful for the environment than using CFL and LED lamps. Additionally, the environmental impact from the use of LED lamps for the facility was less than that of CFL lamps.</p>