Modern installations in a building with low energy use. The example of the largest building in Poland in NZEB standard

Abstract

In Szczecin a mixed-use complex “Posejdon” is being constructed. It will be the first NZEB (Nearly Zero – Energy Building) in Poland that meets the strict ecological standards that all buildings will have to meet after January 2021. Compared to a similar building constructed with traditional techniques, the building has significantly lower CO2 emissions. The project was presented at the COP24 United Nations Climate Change Conference in Katowice. The “Posejdon” service complex consists of two hotels, modern offices and a small commercial section. There are very interesting and modern installations in the complex, which are presented in the paper. The building uses a geothermal energy system for the needs of heating and cooling, which is composed of 48 vertical heat exchangers located in 300-metre long ground boreholes under the foundation slab, connected with over 900 highly efficient, inverter heat pumps. The decentralized system of heat pumps in such a big building is unique even in Europe. The electrical energy necessary for the operation of the entire system will be obtained from 342 photovoltaic panels located on the roof of the building. The renewable energy technologies implemented in the “Posejdon” building, serve as a reference to export management and design strategies to other NZEB with similar characteristics.