Concentration optimalization of ethylene glycol in the ground heat exchanger heat pump

At present, particular attention is paid to the diversification of heat sources, to the efficient use of energy and to the ecological aspects of the use of primary energies, especially in the EU and within the Slovak republic. A very good way to achieve the use of renewable energy sources. Slovak republic has a real renewable energy potential mainly in biomass, geothermal energy, solar energy and hydroponics of rivers. Every kind of renewable energy has its own specifics. In the Slovak republic water energy and biomass are currently used. In Slovak republic there are suitable conditions for use of geothermal energy due to its suitable placement on breaks in the Carpathian arc. The average geothermal gradient for the SR is 33 K/km, with some locations up to 50 K/km, while the average is 30 K/km in the world. Hydrological research has been focused on prospective geothermal waters with temperatures ranging from 25°C to 150°C with a total usable potential of more than 5 500 MW. The problem of using geothermal water is its potential (water temperature) and mineralization causing the incrustation of pipelines and other system facilities. While geothermal resources with a water temperature above 25°C are closely linked to certain locations, the country's low-potential energy is above average in the whole of Slovak republic. Geothermal heat from the ground is most commonly obtained through horizontal ground/water type heat exchanger (about 40 W/m) or through vertical exchanger embedded in deep boreholes of approximately 100-150 m (40-60 W/m) [4].

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2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).