Energi - och ekonomipotential för solceller i Hållbara Järva
One of the city of Stockholm?s main objectives is to have a society completely free from fossil fuels. To achieve this, several investments regarding improvements in energy efficiency and renewable energy are currently being planned or implemented. One of these investments is a project called Hallbara Jarva which is located in the suburbs of Stockholm. The purpose of this thesis is to examine the prospects of an investment in photovoltaic cells from an energy-saving and economical point of view. The analysis is limited to three buildings within Hallbara Jarva and is intended for the property owner. Solar energy is a type of renewable energy source and is commonly divided into solar heating and solar power. This thesis introduces both techniques but the calculations are limited to solar power. The many types of technical solutions for photovoltaic cells all derives from the same phenomena. In commercial applications The photovoltaic cells are connected with a power inverter to form a power providing system. To approach the issue an analysis of three main areas is made. Primarily the photovoltaic system is sized based on the electricity consumption in the buildings. Furthermore an assessment is made whether or not the photovoltaic system is a profitable investment. Lastly a comparison between the output of the analysis and the main renewable energy objectives for Hallbara Jarva is made. The final result is obtained which states that the photovoltaic system yields a sufficient amount of electricity during the summer, to meet the electricity requirements in the buildings. The system should be sized so that the monthly electricity production never exceeds the demand. An evaluation of this particular investment determines that it yields a small profit.