Through Step2Sport project, energy efficiency measures are being implemented in 26 pilots. While the most significant renovation has been accomplished in pilots such as CEM Vallirana sport complex and Stalowa Wola swimming pool, minor renovation steps have also been made in several other sport centers that participate in the project. We gleaned three of them -Sport Hall of Farsala, Zambrów swimming pool and Örkelljunga swimming pool- and we present you their step by step refurbishment towards NZE prospect.

Sport Hall of Farsala
At Farsala only a part of the proposed energy improvement recommendations has been implemented due to the lack of available financial resources. The existing lighting system has been replaced with metal halide lamps, new fluorescent lamps with electronic ballasts, combined with the installation of photosensors and occupancy sensors leading to estimated primary energy savings of about 11%. New energy saving aluminum windows with a Uf value of 2,7 W/m2K have been installed leading to estimated primary energy savings of about 20%. A new heating/hot water diesel/natural gas boiler has been installed combined with outdoor temperature compensation system, leading to estimated primary energy savings of about 9%. Actual figures regarding the savings achieved are not available yet due to the short period since the implementation of the actions.

Zambrów swimming pool
In the indoor swimming pool they proceeded to the systematic exchange on light to energy-efficient light sources. The 40 light points of traditional light bulbs of 60 W were replaced with LED bulbs with a power of 7-15W. Average savings in this account can be estimated at 40 point x 50W x 10 hours of lighting = 20 kWh/day, what is equal to 7300 kWh/year. In addition, it has been limited source of heat loss in the pool hall by installing purchased caps with a diameter of 100 cm caulking inlet and outlet water slide at night. This allowed for a visible improvement of the air as well as reduce the demand for heat. All the water attractions are activated only upon request of customers, what contributes to energy savings.

Örkelljunga swimming pool
Energy efficiency in complex buildings, such as swimming pools, with special requirements for comfort, moisture level protection against corrosive environment etc. makes great demands to do the “right things” and have control of the actions by implementing the continuous measurements etc. Örkelljunga swimming pool, built in 1970, had changed the ventilation units in 1994 and there were still a few years left of its technical and-economic life when part of the control system broke down. Then they chose to invest in a new digitally connected control and monitoring system with remote monitoring and supplement with a number of new donors, such as the humidity outside, to get a more energy efficient and optimized operation. The ventilation unit includes features such as a heat pump for recovering energy from the exhaust air to pool water, dehumidification, heat recovery for air supply etc. Through optimized operation strategy there was reached about 15% more efficient energy use through, for example, reduced supply air when it is humid outside and the increased return air. Better heat pump efficiency through improved operation, etc. For a relatively modest investment, about 10 000 EURO, they have achieved new control and remote monitoring of three ventilation units and new and additional sensors and thus been able to optimize the operation of the swimming pool and reach a 15% better energy efficiency.