Development of a solar strategy for Helsingborgshem

University essay from Lunds universitet/Energi och ByggnadsDesign

Abstract: As of this moment humankind’s total energy use consists of 87% of non-renewable energy sources. The government of Sweden is aiming for 100% renewable energy system by the year of 2040. The city of Helsingborg is experiencing a solar panel expansion, the installed power increased with 139% from 2015 to 2016. The overall aim of this master thesis was to create a solar strategy for the municipality owned real-estate company called Helsingborgshem. This strategy included a solar mapping of their soon to be renovated buildings, Life Cycle Costing, a gate-to-gate Life Cycle Assessment analysis and integration of photovoltaics. A solar map was created alongside with the categorization list taking into account the average solar irradiation of the studied roofs and the possibility of a solar system installation on the investigated buildings from a building permit point of view. Three buildings from different areas were picked out for a deeper investigation, where additional information was added in the 3D-modeling. Thereafter, the complete Photovoltaics system was designed and several cases were conducted. From the estimated hourly electricity usage data, three cases were considered, - the current case was based on the requirement of which facilities’ energy usage could be covered by Photovoltaics. Two other cases were assumed according to the future building renovation plans. An analysis of a battery implementation was performed for one of the investigated buildings but it was proven as not worth the investment due to the currently high price together with the need of a replacement after 15 years. Four different panels from China and Poland were compared and investigated for a Life Cycle Cost analysis and the most profitable result was established. In total 24 cases were considered for each of the three buildings. The result showed that the Chinese panel, Seraphim 320 W, have a higher total savings alongside with the shortest payback time. The result of the gate-to-gate Life Cycle Assessment showed the environmental impacts per kg panel of the transportation emissions from producer to end customer was 53 times smaller when transported from Poland in comparison to China. From a Life Cycle Assessment point of view and integration, the Polish panels were recommended for the implementation.

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