[Text / "High-tech LED - Technology and Applications" September issue Wang Lirong compiled]
summary:
In the United States and other countries, light-emitting diodes (LEDs) are being used in airport lighting. This comprehensive study aims to provide information for the performance of LED airport lighting systems, primarily for use by airport operations managers and electrical maintenance personnel. Information about the performance, cost, and other aspects of LED lighting systems is difficult to attribute to a single point. This report is the result of collecting the feelings and feedbacks of LED airport lighting after use.
Investigators conducted a literature review and surveyed individual representatives who used LED airport lighting. Individuals from 22 airports and aviation agencies agreed to join the survey and complete the task in full (100% recovery rate).
The results show that LED airport luminaires reduce energy consumption and maintenance requirements compared to traditional airport lighting technologies. LED airport lighting systems have been in use for many years, and most of the application feedback in terms of visibility and performance is positive. Through the advancement of technology and the efforts of the FAA (FAA) to promote the guiding role of LED technology in airports, the early compatibility problems have been greatly improved.
In airport lighting systems, most of the power systems were originally designed for incandescent lighting technology, so LED airport lighting systems are not compatible with this infrastructure. However, by replacing part of the power infrastructure, simply replacing incandescent lamps with LED lights can greatly improve energy efficiency and reliability.
Compared with traditional incandescent lamps, although the current use of LED lamps requires higher initial costs, after several years, the reduction in energy consumption and the maintenance cost savings may bring returns to the initial high cost investment. The maintenance requirements for LED airport lighting systems are much lower than those for incandescent systems, and future research directions can pinpoint them to the economic impact of this.
background:
Light-emitting diodes (LEDs) are increasingly being used in a wide variety of safety-related applications, including evacuation indicators (Boyce 1994), road traffic lights (Conway and Bullough 1999), automotive brakes and turn signals (Olson 1987). ), street lighting (Radetsky 2010) and airport lighting. Several features of LED lights make them popular in visual signal applications. (See also Appendix A for LED lights and a comparison of LEDs and incandescent sources.)
Solid state device durability and long life Wide range of color options (including the color of all aeronautical signal lights)
Narrowband wavelength output produces a very low saturation energy demand for instant switching time
At present, most airports use mainly incandescent filament bulbs, which have a shorter working life than LED lamps. The incandescent standard has a working life of about a few hundred to several thousand hours (Bullough 2000). In contrast, well-designed LED lighting systems can last for thousands of hours.
The luminous efficacy (lm/W) of incandescent lamps is also lower than that of LED light sources, and correspondingly, more energy is needed. Due to the low efficiency of incandescent lighting, the enactment of the Energy Law, such as the Energy Independence and Security Act of 2007 (EISA), has accelerated the replacement of traditional incandescent lamps in many lighting applications. Although EISA does not directly affect airport lighting, the rapid advancement of ordinary incandescent lighting replacement has contributed to the great interest and application of LED signals in US airports.
The difference between some LED lights and incandescent technology may be seen as a possible barrier to wider use of LED airport lighting. The narrow-band spectral output of LED lights means they don't produce infrared energy (high temperatures), and infrared can help melt snow and ice when the weather is very cold. LED airport lights must be compatible with the existing dedicated power infrastructure of airport lighting.
In addition, since the current LED lamps are far higher than the incandescent system in terms of initial cost investment, whether the technical advantages of the increase in the service life and the reduction of energy consumption can make up for the initial high investment will be of great concern. Conducted this comprehensive study through the TRB (United States Transportation Research Council) ACRP (Airport Collaborative Research Project), collecting information from literature, airports and other institutions that have used LED airport lighting to help airport operations and maintenance personnel consolidate and screen with Issues related to emerging technologies. The experience gained from the airport where the technology is applied is helpful for other organizations to face questions such as whether to install LED airport lighting, when to install, what are the expected benefits and difficulties. .
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
2. High reliability. It is less affected by climatic conditions and surrounding environment, with stable transmission performance and high reliability.
3.It has more favorable conditions for the development of ultra-high voltage and large capacity, such as low temperature and superconducting power cables.
4.Less maintenance work.
5 The possibility of electric shock is low.
summary:
In the United States and other countries, light-emitting diodes (LEDs) are being used in airport lighting. This comprehensive study aims to provide information for the performance of LED airport lighting systems, primarily for use by airport operations managers and electrical maintenance personnel. Information about the performance, cost, and other aspects of LED lighting systems is difficult to attribute to a single point. This report is the result of collecting the feelings and feedbacks of LED airport lighting after use.
Investigators conducted a literature review and surveyed individual representatives who used LED airport lighting. Individuals from 22 airports and aviation agencies agreed to join the survey and complete the task in full (100% recovery rate).
The results show that LED airport luminaires reduce energy consumption and maintenance requirements compared to traditional airport lighting technologies. LED airport lighting systems have been in use for many years, and most of the application feedback in terms of visibility and performance is positive. Through the advancement of technology and the efforts of the FAA (FAA) to promote the guiding role of LED technology in airports, the early compatibility problems have been greatly improved.
In airport lighting systems, most of the power systems were originally designed for incandescent lighting technology, so LED airport lighting systems are not compatible with this infrastructure. However, by replacing part of the power infrastructure, simply replacing incandescent lamps with LED lights can greatly improve energy efficiency and reliability.
Compared with traditional incandescent lamps, although the current use of LED lamps requires higher initial costs, after several years, the reduction in energy consumption and the maintenance cost savings may bring returns to the initial high cost investment. The maintenance requirements for LED airport lighting systems are much lower than those for incandescent systems, and future research directions can pinpoint them to the economic impact of this.
background:
Light-emitting diodes (LEDs) are increasingly being used in a wide variety of safety-related applications, including evacuation indicators (Boyce 1994), road traffic lights (Conway and Bullough 1999), automotive brakes and turn signals (Olson 1987). ), street lighting (Radetsky 2010) and airport lighting. Several features of LED lights make them popular in visual signal applications. (See also Appendix A for LED lights and a comparison of LEDs and incandescent sources.)
Solid state device durability and long life Wide range of color options (including the color of all aeronautical signal lights)
Narrowband wavelength output produces a very low saturation energy demand for instant switching time
At present, most airports use mainly incandescent filament bulbs, which have a shorter working life than LED lamps. The incandescent standard has a working life of about a few hundred to several thousand hours (Bullough 2000). In contrast, well-designed LED lighting systems can last for thousands of hours.
The luminous efficacy (lm/W) of incandescent lamps is also lower than that of LED light sources, and correspondingly, more energy is needed. Due to the low efficiency of incandescent lighting, the enactment of the Energy Law, such as the Energy Independence and Security Act of 2007 (EISA), has accelerated the replacement of traditional incandescent lamps in many lighting applications. Although EISA does not directly affect airport lighting, the rapid advancement of ordinary incandescent lighting replacement has contributed to the great interest and application of LED signals in US airports.
The difference between some LED lights and incandescent technology may be seen as a possible barrier to wider use of LED airport lighting. The narrow-band spectral output of LED lights means they don't produce infrared energy (high temperatures), and infrared can help melt snow and ice when the weather is very cold. LED airport lights must be compatible with the existing dedicated power infrastructure of airport lighting.
In addition, since the current LED lamps are far higher than the incandescent system in terms of initial cost investment, whether the technical advantages of the increase in the service life and the reduction of energy consumption can make up for the initial high investment will be of great concern. Conducted this comprehensive study through the TRB (United States Transportation Research Council) ACRP (Airport Collaborative Research Project), collecting information from literature, airports and other institutions that have used LED airport lighting to help airport operations and maintenance personnel consolidate and screen with Issues related to emerging technologies. The experience gained from the airport where the technology is applied is helpful for other organizations to face questions such as whether to install LED airport lighting, when to install, what are the expected benefits and difficulties. .
Unfinished
For more information, please refer to the September issue of "High-tech LED-Technology and Applications"
Power cables are used to transmit and distribute electric energy. Power cables are often used in urban underground power grids, internal power supply of enterprises, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater power transmission lines across rivers and seas.
In power lines, the proportion of cables is gradually increasing. Power cable is a cable product used to transmit and distribute high-power electric energy in the trunk line of power system.
The structure of power cable is relatively simple, which can be divided into conductor, internal and external insulation layer, sheath, armor layer and protective layer. The conductor is mainly made of copper and aluminum, which is used to conduct current. The insulating layer is usually wrapped around the conductor to isolate the conductor and so on. There are various types of power cables. If they are classified according to voltage, they can be divided into low-voltage, medium voltage, high-voltage, ultra-high voltage and ultra-high voltage cables.
Advantages
1. Small land occupation. Generally, it is buried in the soil or laid indoors, in ditches and tunnels. The insulation distance between lines is small, without poles and towers. It occupies less land and basically does not occupy space on the ground.2. High reliability. It is less affected by climatic conditions and surrounding environment, with stable transmission performance and high reliability.
3.It has more favorable conditions for the development of ultra-high voltage and large capacity, such as low temperature and superconducting power cables.
4.Less maintenance work.
5 The possibility of electric shock is low.
Low-Votage Power Cable,Medium Voltage Power Cable,High Voltage Cu Power Cable,Pvc Power Cable
Ruitian Cable CO.,LTD. , https://www.rtpowercable.com