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The energy demand of an indoor ski slope
Mozola, Ondrej ; Linda, Jakub (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the issue of energy requirements for operation of indoor ski slopes. The first part is dedicated to research of snow making, cooling and construction methods of ski halls along with the examples of specific projects. In the second part, the aim was to design a ski hall with specific geometry and insulation and then define energy losses of such building. Subsequently, all related energy flows were calculated, which led to the determination of the required cooling capacity. Based on this, the cooling cycle was calculated and the overall electricity demand for the operation of the ski hall during the year was set. In the third part, three options for covering electricity needs are evaluated and at the same time they are compared in terms of financial costs during the year.
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Energy intensity of artificial snow production
Křepela, Radim ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The presented diploma thesis informs about the origin, history, and benefits of technical snowmaking. It introduces what snow equipment consists of and what processes artificial snow is produced. It also shows the price of tons of snow produced from individual commercially available equipment. In the experimental part, the work deals with the calculation of droplet freezing for various input parameters of water, environment, and equipment. A sample calculation was performed for a falling water droplet from a snow lances. The droplet of discharged water was 0.3 mm in size and had a temperature of 2 ° C. The temperature of the environment was chosen to be -10 ° C. Furthermore, the trajectory of the droplet from a snow gun was determined. In the design, a specific snow pole was designed for the specified parameters, including the speed of the environment. The results were then compared with snow poles available on the market.
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The energy demand of an indoor ski slope
Mozola, Ondrej ; Linda, Jakub (referee) ; Pospíšil, Jiří (advisor)
This diploma thesis deals with the issue of energy requirements for operation of indoor ski slopes. The first part is dedicated to research of snow making, cooling and construction methods of ski halls along with the examples of specific projects. In the second part, the aim was to design a ski hall with specific geometry and insulation and then define energy losses of such building. Subsequently, all related energy flows were calculated, which led to the determination of the required cooling capacity. Based on this, the cooling cycle was calculated and the overall electricity demand for the operation of the ski hall during the year was set. In the third part, three options for covering electricity needs are evaluated and at the same time they are compared in terms of financial costs during the year.
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Energy intensity of artificial snow production
Křepela, Radim ; Fiedler, Jan (referee) ; Pospíšil, Jiří (advisor)
The presented diploma thesis informs about the origin, history, and benefits of technical snowmaking. It introduces what snow equipment consists of and what processes artificial snow is produced. It also shows the price of tons of snow produced from individual commercially available equipment. In the experimental part, the work deals with the calculation of droplet freezing for various input parameters of water, environment, and equipment. A sample calculation was performed for a falling water droplet from a snow lances. The droplet of discharged water was 0.3 mm in size and had a temperature of 2 ° C. The temperature of the environment was chosen to be -10 ° C. Furthermore, the trajectory of the droplet from a snow gun was determined. In the design, a specific snow pole was designed for the specified parameters, including the speed of the environment. The results were then compared with snow poles available on the market.
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Cannons in a different war
Špinková, Lucie ; Novák, Arnošt (advisor) ; Stachová, Jana (referee)
This thesis is focused on members of two groups, rangers and ski lift operators of the area of Krkonoše mountains. In Krkonoše National Park there si a huge gain of using artificial snow lately, which is globally supposed to be kind of adaptation on climatic changes. It leads to extension of ski season, which is livelihood for many ski lift operators. This fact evokes conflicts. Rangers say that artificial snow has negative influence on environment, such as decrease of water, biodiversity, soil etc. I have decided to find out, using a quantitative sociological method of semi-structured interviews followed by analysis, how these two groups percieve the nature and how their differnces influence negotiation of reproduction of countryside in Krkonoše mountains. Sources of my research were works of authors such as Swyngedouw, Macnaghten, Urry or Escobar. These works describe various kinds of socio-countrysides and authors try to destroy stereotype of one nature. These socio-countrysides may be the main reason for arguing about nature. This thesis extends knowledge about heretofore missing analysis of conflict between two groups of ski lift operators and rangers. Main contribution of the thesis is undertsanding to two groups dealing with the same issue, but with different perspective and opinion.
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The impact of artificial snow production on the runoff balance in mountain basins
Murdychová, Pavlína ; Jeníček, Michal (advisor) ; Kučerová, Dana (referee)
This bachelor thesis handles issue of impact of artificial snow production on the runoff balance in mountain basins. First part of the thesis is summary of available literature about properties of artificial snow and its impact on natural sphere with regard to climate change. The second part of this thesis analyzed the change of water balance and runoff in selected basins in Krkonoše mountains. Data from monthly flows from three hydrological station - Vestřev (Labe), Horní Staré Město (Úpa), Dolní Sytová (Jizera) from 2003 to 2011 and data abstraction of water for snowmaking for the period 2001-2011 were used. The artificial snowmaking does not occure in long term to significant change in flow out, only to change their annual distribution. The impact of artificial snow production would be significant with evidence in a small basins. Keywords: artificial snow, snowmaking, water balance
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Comparison of vegetation on ski slopes with artificial or natural snow in CHKO Bílé Karpaty and CHKO Beskydy
KOCKOVÁ, Jitka
Vegetation cover of 24 ski slopes both with artificial and natural snow was studied; on each slope 5 phytocenological relevés measuring 4 x 4 metres were taken. A method of direct gradient analysis (RDA) was used to detect differences in composition of phytocenological reléves on the ski slopes with natural or artificial snow. However, no impact of use of artificial snow on vegetation was identified. During the winter season of 2009 and of 2010 samples of artificial and natural snow were taken for chemical analyses. The chemical composition differed significantly; artificial snow contained more NO3-, SO42- and Ca2+ ions and its pH was more alkaline in comparison with natural snow.
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Comparison of vegetation on ski slopes with artificial or natural snow in CHKO Bílé Karpaty and CHKO Beskydy
KOCKOVÁ, Jitka
Vegetation cover of 24 ski slopes both with artificial and natural snow was studied; on each slope 5 phytocenological relevés measuring 4 x 4 metres were taken. A method of direct gradient analysis (RDA) was used to detect differences in composition of phytocenological reléves on the ski slopes with natural or artificial snow. However, no impact of use of artificial snow on vegetation was identified. During the winter season of 2009 and of 2010 samples of artificial and natural snow were taken for chemical analyses. The chemical composition differed significantly; artificial snow contained more NO3-, SO42- and Ca2+ ions and its pH was more alkaline in comparison with natural snow.
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