Solenergi på Nya Karolinska Solna
In today?s society climate change has grown to one of the largest global issues. To reduce emissions of greenhouse gases, large changes of the energy system are required. An increasingly popular solution is investments in local production of renewable energy resources like wind, solar or geothermal power. The following report examines the possibility for implementing a solar power plant on the new hospital Nya Karolinska Solna. Two different technologies for extraction of solar energy has been studied, solar thermal collectors to meet the need of heating and solar cells to satisfy the need for electricity linked to operating the hospital building. Result shows that an investment in a solar cell plant for electricity production is the most profitable solution. The plant will have the capacity to supply electricity for operating the ward floors to 46, 4 % of the yearly needs. As no need for external heat exists during five out of 12 months, the full potential of the solar thermal collector plant can?t be utilized. This leads to coverage of external heat Need of only 14,1 % over the year. The most profitable solar cell plant generates a net present value of 2,3 MSEK, the corresponding number for the most profitable solar thermal collector plant is ?3,7 MSEK. The result concludes that an investment in a solar cell plant is the most fitting for Nya Karolinska Solna. In addition to contributing to achievements of environmental goals, the plant will also generate positive cash flows resulting in a total profit on the investment. Moreover, the study has discovered that postponing the investment to the future is viable, as it will additionally increase the profitability of the investment due to further development of solar cells.