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  • 1.
    Olovsson, Jens
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
    Hemautomation: Automatiska persienner för nedkylning2018Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    How much heat radiates in through windows? It depends on their direction and the size of them. Two methods to prevent a temperature increase are compared in this report. The first method is by removing the heat with a heat pump, which is compared to the second method that involves automatic blinds. The cost to run the heat pump to remove the heat is calculated in MATLAB. The control of the blinds in this case is with KNX. The communication is done through a bus. ETS5 was used to program the blinds. The calculations assume that the size of the southern windows are 8 m², the east-facing windows are 5 m², and the west-facing windows are 4 m². The added heat is assumed to be 10 000 kWh throughout the year. The calculations does not take outside temperature into account. Data for the amount of sunshine is taken from SMHI. With the help of this information the cost of cooling the radiated heat is calculated to 460 swedish crowns per year. The cost of buying the heat pump is 20 350 swedish crowns. One blind costs 10 000 swedish crowns to buy. The author recommends the heat pump to cool the building in this case.

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