Abstract
The energy demand in residential sector constitutes an important fraction of the entire energy consumption (40% in EU). Solar district heating (SDH) is a key strategy to reduce use of fossil fuels in buildings. Inside the European project REPLICATE, financed by Horizon 2020 SCC1 Smart Cities and Communities, a SDH with a seasonal storage (STES) has been designed to be realized in the city of Florence. It is the first example of solar district heating with a STES in Italy. The design phase has aimed to size properly the extension of solar field and the volume of seasonal storage based on several parameters such as number of dwellings to feed, heat demand, solar resource, geology of the location and economic reasons. The paper deals with the model that has been realized through TRNSYS to describe the energy fluxes of heating plant andtheir optimization process. The computational model depicts the possible operating conditions and leads to define the control strategies of solar field and seasonal storage, integrated with commercial components that complete theplant such as gas boiler, heat pump and overall circuit. Hot water tank TES has been selected as the appropriate typology of storage for this application based on geological considerations. The thickness of insulation material and various layers have been determined. The numerical analysis fixes the volume of TES to be 3800 m3 and a solar field of about 1000 m2. The solar fraction expected by the district heating is 44%.
Highlights
The energy demand in residential sector constitutes an important fraction of the entire consumption of energy, counting for the 40% in EU [1].In order to reduce the use of fossil fuels and the emissions of greenhouse gases caused by buildings, the integration of renewable energies, solar technologies in particular, plays an important role.A very promising strategy is represented by the concept of solar district heating (SDH) in which the heat, provided by solar thermal collectors, is stocked in a seasonal thermal energy storage (STES or TES) during spring and summer to release it during autumn and winter [2]
The energy demand in residential sector constitutes an important fraction of the entire energy consumption (40% in EU)
The design phase has aimed to size properly the extension of solar field and the volume of seasonal storage based on several parameters such as number of dwellings to feed, heat demand, solar resource, geology of the location and economic reasons
Summary
The energy demand in residential sector constitutes an important fraction of the entire consumption of energy, counting for the 40% in EU [1].In order to reduce the use of fossil fuels and the emissions of greenhouse gases caused by buildings, the integration of renewable energies, solar technologies in particular, plays an important role.A very promising strategy is represented by the concept of solar district heating (SDH) in which the heat, provided by solar thermal collectors, is stocked in a seasonal thermal energy storage (STES or TES) during spring and summer to release it during autumn and winter [2]. A very promising strategy is represented by the concept of solar district heating (SDH) in which the heat, provided by solar thermal collectors, is stocked in a seasonal thermal energy storage (STES or TES) during spring and summer to release it during autumn and winter [2].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
