Energieffektivisering och energioptimering av Strömma naturbrukscentrum

Abstract: Strömma Naturbrukscentrum is an agricultural high school in southern Sweden. The establishment consists of over 30 buildings which includes student housing, lecture halls and animal housing. Due to its numerous buildings, Strömma faces a high energy demand. To address the high energy demand, this report was undertaken to explore ways to reduce and optimize the energy consumtion, as well as find solutions to reduce Strömma’s power peaks. For six of the buildings at Strömma, simulations in the calculation software program VIP-Energy were used to evaluate energy-efficient actions. The goal was to identify potential heat savings and by creating building models and analyzing various measures, the heat consumtions reductions were identified to a maximum of 141.5 MWh per year. An accumulator tank could also help the heat demand and possibly prolong the lifetime of the boilers. The project also investigated the possibility of implementing solar energy together with energy storage options, such as batteries and hydrogen, this to improve Strömma’s energy selfsufficiency. The modelling of the solar panels and the batteries was done in the software SAM (System Advisory Model) and MATLAB. With an assumed capacity of 200 000 kWh, the solar panels were not expected to consistently generate excess electricity beyond Strömma’s consumtion. It was therefore seen unnecessary to invest in batteries as a solution for energy storage. Hydrogen as a storage option also presented challenges such as requirments of space and high costs associated with the implementation. Both options were therefore considered unsuitable for Strömma.