Practices

Preko Pilot: Olive oil mill building and PV

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The PEGASUS Interreg MED project (Promoting Effective Generation and Sustainable USes of electricity) aims to give evidence of the feasibility of microgrids acting on technical or administrative obstacles which are hindering the use of microgrids in disadvantaged areas; a tested business model will show advantages of smart interconnection and facilitate the adoption of necessary acts to define an ENABLING environment. The innovative approach of PEGASUS focused on experimenting a simulation of functioning of microgrids in 7 pilot areas jointly; solutions will be based on concrete situation with real data.

The Municipality of Preko is a small island community situated on Preko Island. In 2015, the municipality adopted Strategies of Sustainable Development where it is stated that one of the goals is long-term energy efficiency and promotion of renewable energy. The Preko pilot consists of microgrid using PV as RES, installed on an olive oil mill building acting as RES (Prosumer) and a „Pučko otvoreno učilište“ building that is acting as Consumer.

 

The Preko pilot project has 3 major goals:

-to prove the feasibility as well as the economic and environmental benefits of the microgrid solution using PV as RES source,

-to develop a sustainable and applicable business model that can be transferred to other Croatian municipalities and EU regions,

-to overcome existing legal barriers

 

The 10 kW PV installation on the roof top of the olive oil mill serves as RES in the Preko microgrid project. PV provides the majority of the electricity needed for the neighbouring building of 'Pučko otvoreno učilište'. Currently both buildings are connected to the electrical grid and are owned by the Municipality of Preko.

 

The olive oil mill building was built in the 60s. Currently it is being used as an olive oil mill and it has an average of 300 kWh monthly el. energy consumption. It is important to mention the significant peak that occurs in the season of olive oil production; when mills operates 24 hours, but only for a couple of days, as current olive oil production on Preko is only 20 % of total capacity.

 

The building  'Pučko otvoreno učilište' was built in 1960 with a total net area of 385,23 m2. It is currently occupied by 4 different users; 3 public ones and 1 private. Each of the users has its own consumption meter installed. One office is used by 'Pučko veleučilište', the second is the Tourist board, the third user is a multimedia hall which is used for various local events and the fourth one is a privately owned cafe bar. The building is connected to the local grid. As a heating source during the winter, air conditioning units are used, thus contributing to overall el. energy consumption. Average annual el. energy consumption is 12.145,00 kWh with annual cost of 1.671,33 EUR, corresponding to annual CO2 emission from el. consumption of 2.8 t of CO2 per year.

 

Currently, the Preko pilot is finalising testing – metering devices were installed in November 2017 and the metering started in late December 2017. Preko also added a microgrid as part of a SECAP.

 

Learn more about the PEGASUS project and its tests on microgrids HERE

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