The purpose of this bachelor´s report is to expand the knowledge about heat supply of a small house in Malmö. The heat supply will be provided from solar panels in combination to two accumulator tanks which will storage the up heated water and a pellet boiler.
The technique used here is warmth storage in water over seasons, which will provide the total need of heating for the house. Accumulator tanks in combination to solar panels gets more and more common in Sweden but this far it´s unusual to use it for storage over seasons. This report will highlight many of the difficulties associated whit heat storage and give information about a system's possible design and function.
The design of this system is decided early on. An accumulator tank is placed 2 meters down in the earth on the backside of the house. This tank is constructed to fit this particular house. It´s supposed to store the heated water which will be used the following winter. The warm water is provided by the solar panels when they have their highest capacity and the need of heating is non-existing.
The big question is if it´s possible to support this house in Malmö by energy from the sun as main source and pellets as secondary source?
After a couple of guesses, limitations, see "Avgränsningar" below, and calculations the conclusions are that the first year of use the tank will be loaded between May and February. During this period the house will not be heated so best would be if this was done before the habitants move in. The conditions will be very different the first year compared to following years, since the water has to be heated up from a low temperature. The following years will be pretty much alike, only different according to outside temperature and solar radiation.
18 solar panels with an area of 47 m
2will be installed and connected to the accumulator tank in the backyard, which has a volume of 190 m3.
During most of the year, the installation year, heat is stored in water at a temperature of 90
⁰C. Since the heating of the water is taking place during larger part of this year, the system is not able to function.
In the years to come, hot water to radiators is provided by solar panels and accumulated heat from solar panels. The accumulation of heat occurs primarily during the summer period.
2012. , 118 p.