Page 197 - AJWEP-22-6

Municipal street lighting retrofit in Bulgaria

Table 6. Type, rated power, and number of luminaires in the modernized street lighting systems
Town Flood- Road type luminaires Park type Total Total
lights luminaires number installed
LED LED power, W Total CFL LED of street electrical
power, W number and park power, W
120 10.8 16.6 20.5 22 25 28.5 34.5 41 50 23 14.4 luminaires
Pavlikeni 16 78 807 113 36 61 77 59 50 28 1,325 - 52 1,377 29,221
Byala - - 369 - - - 85 - - - 454 43 - 497 9,537
Cherkva
Total 16 78 1,176 113 36 61 162 59 50 28 1,779 43 52 1,874 38,758
Abbreviation: LED: Light-emitting diode.

3. Evaluation of energy efficiency, financial
savings, and environmental benefits of the
proposed modernization

The calculations were prepared in connection with
the main objective of the current investment working
project—an application submitted by Pavlikeni
municipality under the program “Renewable
Energy, Energy Efficiency, Energy Security” of the
European Economic Area Financial Mechanism
2014–2021, Procedure No. BGENERGY-2.001, titled
“Rehabilitation and Modernization of Municipal
Infrastructure—Systems for Outdoor Artificial Lighting
Figure 12. Existing power supply box for street in Municipalities.” The calculated energy and economic
lighting with outdated protective and switching indicators were comparable to those used in energy
equipment efficiency projects by leading researchers. 35-37
In Bulgaria, the mandatory state regulation
Ordinance No. E-RD-04-3 of May 4, 2016, titled
“On eligible measures for the implementation
of energy savings in final consumption, methods
for demonstrating the energy savings achieved,
requirements for assessment methodologies, and
means of confirmation,” is in force, according to
23
which specialized methodologies, approved by the
Bulgarian Sustainable Energy Development Agency,
must be employed.

3.1. Energy and carbon dioxide savings calculations
The methodology for energy and CO savings calculations,
2
according to the national regulatory document , includes
38
Figure 13. Modern control cabinet for street the sequential calculation of final energy savings at an
lighting with integrated global system for mobile end-user site (FEStot) (Equation IX), primary energy
communications/general packet radio service savings at an end-user site (PEStot) (Equation X), and
communication and monitoring CO emission reductions (Equation XI).
2

Volume 22 Issue 6 (2025) 191 doi: 10.36922/AJWEP025310242