The project RADLEneRgo – Energy Development in the Pécs Brewery has been implemented
Pécsi Sörfőzde Zrt. won a 55% intensity grant of HUF 54,175,000 in its application No. GINOP-4.1.4-19-2019-00007 for the support of building energy developments aimed at the use of renewable energy and increasing energy efficiency, within the framework of the Széchenyi 2020 program.
The aim of the project is to install, connect to the grid, obtain permits and commission a low-voltage photovoltaic power plant system equipped with backfeed protection on the roof surfaces of the buildings located at the premises of the Pécsi Brewery at 7624 Pécs Alkotmány u. 94.
The peak power of the designed photovoltaic power plant is 358 kVA. A total of 780 RISEN solar panels with a power of 500Wp were installed on the flat roof surfaces of the Brewery. The solar panels were weighted to protect the waterproof insulation of the roof surfaces, following the specifications of the panel holder manufacturer and taking into account the characteristics of the Brewery's roof surfaces. The orientation of the solar panels is 80% east-west and 20% south, tilted 10 degrees to the horizontal plane. The panels are divided into seven inverter zones, the inverters have a power of 36 kW, 50 kW and 100 kW. Due to the protection against islanding, the inverters only transfer half of the energy generated by the solar panels to the grid if there is live grid voltage on the AC side of the inverters. The system is protected against backfeed, so the inverters' production and the Brewery's electricity consumption are continuously monitored by the control unit. In the event that the solar power plant's production exceeds the Brewery's consumption (the set safety threshold), and therefore backfeed occurs to the power supply network, the control unit will regulate the inverters' energy production.
In addition to economic considerations, the solar power plant fits into the current and increasingly urgent direction of carbon-neutral production processes. The microclimate of the city of Pécs is excellent for the economical operation of solar systems, the average sunshine period of 2,000 hours/year in Hungary has exceeded the average of 2,200 hours/year in our case based on measurements of recent years. The intensity of solar radiation was 800-850 W/m2 based on control measurements made in June, which is also a good value, far exceeding the national average. The panels and equipment were placed in an invisible way on the flat roofs, they do not spoil the overall appearance of the buildings, and they do not disturb the people living in the vicinity of the Brewery with any reflected light effect or any kind of sound effect. The waste generated during the investment, mainly cardboard packaging materials, was handed over to the regional waste collection company in accordance with the applicable waste collection rules. During the construction work, the quality of the installation work and installation materials was continuously monitored in order to increase the expected service life of the system without intervention and to minimize unplanned energy production outages.
The system developed represents the highest level currently available on the market. They are state-of-the-art devices, both in terms of the performance of the solar panels and the quality of the inverters and control and communication devices. The thoughtful, carefully designed arrangement of the panels allows for the most efficient use of solar radiation, despite the limited space available. The control system continuously analyzes current consumption data and maximizes the replacement of grid energy with green energy. The project will result in significant energy savings and a reduction in environmental impact now and is expected to occur in the coming decades.
The actual completion date of the project is June 15, 2021.
Further information is available at:
Dr. Zoltán Szemerey
szemerey.zoltan@gmail.com
