Combined Renewable Energy Resources System Geothermal

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Combined Renewable Energy Resources System Geothermal ( combined-renewable-energy-resources-system-geothermal )

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Energies 2022, 15, 6398 7 of 23 When writing about the activities at ChT, one should not forget about the sustain- able development policy it implements. Caring for the environment and supporting the development of the local community while implementing horizontal policies is a very important part of their activities. ChT carries out a number of activities aimed at counter- acting environmental degradation. In addition to using renewable energy sources (from a geothermal source) to produce heat for the swimming pool complex, ChT strives to reduce its environmental impact in all its processes. Particularly noteworthy is the use of modern technology in the thermal water treatment process. With the use of nanosilver in the water treatment process, it is possible to remove activated carbon (which is considered a dangerous technological waste) from the filter bed and, using a three-stage disinfection process, can achieve bacteriologically clean and, above all, healthy pool water needing only a significantly reduced dose of sodium hypochlorite. The implementation of the combined RES system described in this paper is a natural progression towards sustainability. The designed technologies and solutions based on a geothermal source and solar energy will reduce the consumption of primary raw materials and make a measurable contribution to reducing CO2. The proposed solution can be successfully implemented in other, similar, facilities. Geothermal Borehole Duplex With the implementation of the HGS system, a new geothermal borehole, Chochołów GT-1 will be constructed and the currently producing borehole Chochołów PIG-1 will be converted into an absorption borehole (Figure 2). The capacity of the new source will be increased to 160 m3/h. The proposed Chochołów GT-1 borehole will be located on the ground surface approximately 385 m to the west of the existing Chochołów PIG-1 borehole (Figure 1). It is planned that a directional borehole will be drilled with an “S” type trajectory. The directional azimuth of the hole will be 20◦. The bottom hole distance from the surface location will be 1102 m, while the bottom hole distance between the existing Chochołów PIG-1 borehole and the proposed Chochołów GT-1 borehole will be approximately 992 m. The distances given will allow the limitation of possible interference between the boreholes and, in the case of the Chochołów PIG-1 borehole being used as an injection borehole, which is very likely, and the re-elevation of the temperature of the thermal water. To a depth of 100 m MD, the Chochołów GT-1 will be drilled as a vertical borehole; from 100 m MD to 1800 m MD, a gradual angle increase is planned until a maximum of 44◦ is reached. From 1800 m MD to 3100 m MD, there will be a gradual angle drop. From a depth of 3100 m MD to 4122 m MD, the Chochołów GT-1 borehole will then be drilled vertically. The ChT development strategy calls for the implementation of measures to expand the product range by diversifying the existing offerings in terms of swimming pools, saunas, and spas, as well as catering. Such a significant expansion of the facility raises the question of the scale of the future demand for heat and electricity. The consequence is to increase the energy independence of the facility in terms of maximizing the use of renewable energy sources and heating and cooling. Currently, all thermal energy for the ChT is drawn from a geothermal source (the Chochołów PIG-1 borehole), which is more than 30 years old, while electricity is purchased from a national electricity supplier. This energy comes from fossil fuels (and thus is not green). Taking into account the provisions of the concession, which implies the need to have a second well fulfilling the absorption role, and the company’s consistent policy based on ecological sustainability, the plans for ChT must take into account the diversification of energy sources and investment in renewable energy-based installations. It is not without significance that the operation of the existing facility is 100% based on heat from the Chochołów PIG-1 well that was drilled in the late 1980s. The construction of the new Chochołów GT-1 borehole is necessary from the point of view of the security of thermal water supply and the continuity of operations and development with a new infrastructure.

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