@ARTICLE{Olczak_Piotr_The_2020, author={Olczak, Piotr}, volume={vol. 23}, number={No 3}, journal={Polityka Energetyczna - Energy Policy Journal}, pages={41-54}, howpublished={online}, year={2020}, publisher={Instytut Gospodarki Surowcami Mineralnymi i Energią PAN}, abstract={In Poland an increase in the of number solar thermal collectors is observed in household applications. For economic and ecological profitability the creation of a solar thermal installation design in a proper manner is essential. In order to determine solar installations size, software calculating future solar heat gains is used. SHW software is an examples of such software. The aim of this work was to compare the simulation results with the real results of the solar installation operation. The comparison was performed by an example of a single-family house with flat plate collector installations located in south-east Poland. This installation supports domestic hot water preparation in a house occupied by four people (in two-year period of analyses). The additional heat source in this building is a gas boiler. Solar fraction parameter values were chosen for this comparison. Solar fraction is calculated as a ratio of solar heat gains used in the domestic hot water preparation process to the heat desired for domestic hot water preparation. The real results of Solar Fraction turned out to be higher than the simulation results from May to August (there were many days with Solar Fraction = 1). A difference of 20–50 percentage points was observed (Solar Fraction). Apart from this period no special differences were observed. Additionally analyses of differences between solar heat gains calculated by Get Solar simulation software with real values (for analyzed building) was performed. This simulation analysis was done before process of building installations.}, type={Article}, title={The comparison of solar installation heat gains and SHW simulation results – case study}, URL={http://www.czasopisma.pan.pl/Content/118051/PDF-MASTER/03-PE-04-Olczak.pdf}, keywords={simulation, renewable energy, solar energy, flat plate collector, solar thermal}, }