Improving the energy efficiency of the lighting system

The main measures to improve the energy efficiency of lighting are as follows:

• Replacement of light sources with new energy-efficient lamps while ensuring the established lighting standards;
• Maximum use of natural light during the day and automatic control of artificial lighting depending on the level of natural light.
• Lighting can be controlled by infrared sensors of human presence or movement;
• Use of modern lighting fixtures with rational light distribution;
• Use of electronic control equipment (ballast);
• The use of circuit breakers for emergency lighting systems in areas of temporary staff;
• Painting of surfaces of industrial premises and the equipment in light tone for increase of efficiency of use of natural and artificial lighting.

You should also pay attention to the following energy saving measures for lighting installations:

1. Replacement of existing luminaires with more efficient ones;
2. Replacement of starting and regulating equipment;
3. Combined lighting;
4. Automatic lighting control;
5. Use of compact fluorescent lamps (CFLs) for interior lighting;
6. Use of lighting control systems.

1. Replacing existing luminaires with more efficient ones.

The table below shows the possible energy savings by replacing less efficient light sources with more efficient ones

* When reducing the normalized illumination for incandescent lamps by one degree in accordance with the lighting norms.

2. Replacement of starting and regulating equipment.

The use of fluorescent light sources in the set instead of the standard control gear (ballast), electromagnetic ballast with reduced losses increases the light output of the kit by 6 ÷ 26%, and electronic ballast - by 14 ÷ 55%.

3. Combined lighting

The use of combined (general + localized) lighting instead of general lighting allows you to save electricity.

For rooms larger than 50 m2, automatic artificial lighting control devices should be used depending on the natural light of the room. Automatic control systems (ACS) allow you to adjust the brightness of the light source (LL, CFL) from 100% to 0%. The automatic control system must be duplicated by manual lighting control.

4. Automatic lighting control

Energy savings with the introduction of automatic lighting control can be estimated using the table. 4.

5. Use of CFLs for interior lighting

Economical compact fluorescent lamps (integrated - with ballast built into the threaded base) are designed for use in office space. Table 6 compares compact fluorescent lamps (CFLs) with incandescent lamps. The table shows that the use of CFLs instead of LR at the same luminous flux can significantly reduce power consumption. CFLs are available with the same base as incandescent lamps, which makes it easy to replace incandescent lamps.

Costs are reduced:

• to replace incandescent lamps - in 10 times;
• to pay for electricity - in 5.4 times.

6. Use of lighting control systems

Significant savings in electricity consumption for lighting can be obtained with the help of a rational lighting control system. Such systems enable or disable lighting fixtures under the following conditions:

• depending on the level of natural light in the premises (for example, by photorelay signals);
• when a certain time of day is reached (for example, by timer signals);
• when a person presses the control buttons (for example, entering the room, the person presses a button that gives a signal to turn on the lights, the lights are turned off automatically at a specified time interval);
• given by signals from presence sensors.

Lighting control systems are very common abroad. When implementing them, it should be borne in mind that they complicate lighting networks and in many cases reduce the service life of some types of lamps. For example, each inclusion of a fluorescent lamp reduces its service life by about two hours. The service life of incandescent lamps with the number of inclusions of about 2500 hours is practically unchanged. With a bigger number of inclusions of incandescent lamps, you can use a soft start system that prevents current surges in the filament of the lamp when it is turned on, when the spiral material has a low temperature and its electrical resistance is low.

According to PMKEU "PATRIOT"