Elkraft från solceller driver komfortkyla i Staben
Abstract: Staben is a building in Uppsala Science Park owned by Vasakronan. During 2013, Staben was renovated and a new air conditioning system was installed. The main components of the air conditioning system are three circulation pumps which require electricity. It is desired by Vasakronan to supply this electric power in a way that is environmentally friendly. Therefore, the possibilities of operating the cooling system of Staben using solar power have been examined in this study. To determine an appropriate size of the solar-cell facility, simulations and calculations were performed. The simulations were based on factors such as outside temperature, insolation and the electric power consumption of Staben. In addition to the simulation, an analysis of insolation and outside temperature was performed to validate the correlation between those two factors. The results of the simulations were validated through calculations and use of PVGIS, a computer program specialized in calculating electric production of solar cells. According to the simulations an appropriate size of the solar-cell facility to operate the cooling system would be 3 kW rated power. This way, no electric power is sold to the grid. The investment of a 3 kW solar-cell facility will cost approximately 70 000 SEK, which results in a pay-back time between 10 and 15 years.
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