Utsikten
Hållbara uppvärmningsalternativ för vandrarhemmet på Finnhamn
Finnhamn is a small group of islands in the Stockholm archipelago. At Stora Jolpan, the biggest island, there is a hostel. The main building was built in 1915 and is called Utsikten. The purpose of this project is to on behalf of the Archipelago Foundation (Skärgårdsstiftelsen) find alternative systems that can replace the existing heating system of Utsikten (an oil-fired boiler and electricity heaters) to a system with renewable energy. The alternative system that this project focuses on is a system of solar collectors combined with a wood chip boiler. Information for the project is collected from a literature review. Also persons with good knowledge of renewable energy systems, or Finnhamn and the hostel, have been contacted.The present need for tap water related energy at Utsikten is calculated in two different ways using estimated data about the guests? behaviors. The energy required to heat the building is calculated using general values for the amount of energy needed to heat a square meter. Dimensioning and cost calculations for the new system are made by companies supplying the current systems and subsystems. Calculations of the economic aspects as well amounts of carbon dioxide emissions are also made.Finally it is found that the suggested heating systems could be applicable on Utsikten. However, the system has difficulties which have to be dealt with. The total heat related need of energy during a year is calculated to 93 000-138 000 kilowatt hours. The solar collectors are suggested to use 41-96 square meters of the roof, complemented with 81-156 cubic meters wood chips.