Over 2,000 rooms, 31,000 m3 of concrete, 95 air handling units with a total air flow of 468 m3 / h and almost 1,000 km of telecommunications cables - this is the picture of the Non-invasive Medicine Center in Gdańsk, the most modern medical complex in Poland.
As in every hospital, the infrastructure related to the installations is a heavy burden on operating costs. They are mainly generated by the ventilation and air conditioning system, hence the designers of this building have tried to lower them significantly.
Hospital air systems are subject to design standards based on sanitary and technological requirements and, in principle, must operate 24 hours a day. As a result, air filters in AHUs need to be replaced frequently. With such a large number of control panels, it is both a time and cost problem. That is why Klimaster designers used a non-standard method of filtration using the phenomenon of static electricity. In addition to the obvious advantage of not having to replace the filters, the internal resistance of the air handling unit has been significantly reduced, which gives a measurable result in saving electricity to drive the fans.
The next step in increasing energy efficiency was the design of a trigeneration system. In short, it is the combined technological production of heat, electricity and cooling energy, reducing the cost of primary energy, in relation to the separate production of each of these forms of energy separately. In the CMN building, the cogeneration machine runs on natural gas, producing thermal energy, and at the same time, the synchronous generator produces three-phase electricity. The total efficiency of this system is 93%, saving up to 27% of primary energy.
In turn, hot water from the CHP cooling system is the driving factor for the absorption chiller, adding another energy saving element, creating a trigeneration system. Trigeneration not only balances heat, cold and electricity production, but also prevents a potential reduction of electricity supply on hot days (blackout). The absorption chiller produces 800 kW of cooling, while the rest of the cooling demand is made up of ESEER high-efficiency screw chillers, each with 1100 kW.
Another element that perfectly saves energy has been designed in the building. As is well known, the main component of the air conditioning system load in summer is solar radiation. Standard interior louvers have little sun protection effect. For this reason, external blinds have been designed on the glass facades, perfectly protecting against the penetration of heat. In addition, individual electric control of the degree of their opening was used, providing a high degree of comfort to the room users.