Buildings, which include schools and libraries, are chosen based on analysis of actual hourly energy consumption during sunny periods in the previous year.
Tallinn is progressing its plan to construct solar power plants on its municipal buildings across the city.
It follows a rooftop construction examination in 2021 on 56 buildings in the Estonian capital to assess energy-saving possibilities. It concluded that 28 buildings in the city can support such power plants.
Municipal solar
The Tallinn Property Department conducted a public procurement exercise in two stages in autumn 2022 and spring 2023. The first procurement (€398,000) has been awarded to OÜ Helios for 10 solar power plants and the second to Solar Wheel OÜ, Diotech Electric OÜ and Diotech OÜ for another 10 plants, costing €364,835.98. The deployments will span two social buildings, three libraries, five schools and four kindergartens.
“Next in line are the Tondiraba Ice Hall, the Zoo car park and Tallinn Botanic Garden,” said Tallinn deputy mayor Tiit Terik. “The inclusion of personal capital from city residents is under consideration for constructing these solar power plants. This way, the city budget could be saved for other expenditure.”
The third procurement is under preparation and is to be announced in the third quarter of 2023. If suitable solutions are found during the planning phase, solar power plants will be constructed on 10 schools, three kindergartens, one library and one social building.
“The next step is to assess the electricity consumption of the rest of the buildings belonging to the city, to find out their roof direction, shadowing and rooftop suitability for solar power plants of the biggest electricity consumers, including research on their load capacities for such facilities,” said Terik.
“Tallinn will also continue efforts to reduce the energy consumption of city buildings. This includes an energy consumption analysis, promoting energy-saving and assessing the state of electrical systems for sustained operations.”
Solar power plants will be installed primarily based on a building’s energy consumption during sunny periods. The analysis for this is conducted based on the actual hourly energy consumption of the building during sunny periods in the previous year. The analysis shows the electricity consumption of the building during sunny hours. Solar power plants are not only constructed for generating electricity for the power grid but also for the building’s consumption.
The combined capacity of the solar power plants constructed under the three procurements is 1.4 MW and they are projected to generate a total of 1.3 million kWh of emission-free electricity per year. An additional €70,000 is expected to be saved from grid costs every year.
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Quelle/Source: Smart Cities World, 31.07.2023
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