20.500.12556/RUL-136776 Modelling and environmental assessment of a stand-alone micro-grid system in a mountain hut using renewables Mountain huts are stand-alone micro-grid systems that are not connected to a power grid. However, they impact the environment by generating electricity and through day-to-day operations. The installed generator needs to be flexible to cover fluctuations in the energy demand. Replacing fossil fuels with renewable energy sources presents a challenge when it comes to balancing electricity generation and consumption. This paper presents an integration-and-optimization process for renewable energy sources in a mountain hut’s electricity generation system combined with a lifecycle assessment. A custom computational model was developed, validated with experimental data and integrated into a TRNSYS model. Five different electricity generation topologies were modelled to find the best configuration that matches the dynamics and meets the cumulative electricity demand. A lifecycle assessment methodology was used to evaluate the environmental impacts of all the topologies for one typical operating year. The carbon footprint could be reduced by 34% in the case of the actually implemented system upgrade, and by up to 47% in the case of 100% renewable electricity generation. An investment cost analysis shows that improving the battery charging strategy has a minor effect on the payback time, but it can significantly reduce the environmental impacts. mountain huts micro-grid renewable energy sources computational modelling experiments lifecycle assessment investment costs payback time planinske koče mikro omrežje obnovljivi viri energije numerično modeliranje eksperimenti študija življenjskih ciklov investicijski stroški doba vračanja true false true Angleški jezik Slovenski jezik Članek v reviji 2022-05-20 10:58:30 2022-05-20 10:58:38 2022-09-15 04:14:19 0000-00-00 00:00:00 2022 0 0 21 str. iss. 1, art. 202 Vol. 15 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 502.174.3:728.61:620.92 1996-1073 10.3390/en15010202 91685379 energies-15-00202.pdf energies-15-00202.pdf 1 2D8B016F8259B3CE6154C38893372813 72e0c00fe691d8121b5b151922b75a3720dbcdce4ee2c00b58d34eb33c123f57 47f18835-d81c-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156558 https://www.mdpi.com/1996-1073/15/1/202 1 ea8376d5-d81a-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156557 Fakulteta za strojništvo 0 0 0