Wyniki wyszukiwania - Biblioteka Nauki

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Properties of the aggressiveness of geothermal and marine water and their negative impact on hydromechanical fittings

100%

Ciosmak M.

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2021

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tom nr 68 (140)

78--85

EN

This article concerns the issue of the long-term operation of hydromechanical fittings during their contact with aggressive water. The aim of this analysis was to investigate the significance of the quality of water during the operation of wind power farms and geothermal power stations, especially hydromechanical fittings during long-term operation at the base of the Baltic Sea and geothermal power stations. This article presents the properties of water and their impact on hydromechanical equipment during long-term operation in marine and geothermal waters. The paper includes the analysis and evaluation of their impact. Additionally, the article describes important problems with the operation of wind power farms and geothermal power stations. The results of periodical analyses of southern Baltic marine water and thermal groundwater from “Geotermia Podhalańska” were evaluated and used as the basis for future research. Every negative parameter of water, known as its aggressiveness, adversely affects the basic materials of wind masts and pipelines, as well as the hydromechanical equipment in contact with marine and thermal water. The presented results show the necessity of controlling the water quality prior to the operation of geothermal water and building wind power masts in coastal marine water. Attention was paid to corrosion during contact with aggressive water with unprotected materials. This issue is rarely seen in the literature but is very important.

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The Assesment of Physical Variables of the Soil Quality Index in the Coal Mine Spoil

63%

Grzywna A. , Ciosmak M.

Journal of Ecological Engineering

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2021

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tom Vol. 22, nr 3

143--150

EN

This paper aimed to evaluate the physical properties of the soils on the slope of the spoil heap of the coal mine in Bogdanka based on literature and the authors’ opinion. The field soil tests were carried out in the agricultural season of 2018 in the coal mine waste dump. The main purpose was to develop and apply the soil physical quality index. For the calculation of the SPQI used nine soil physical properties: texture, bulk density, MWD, AWC, K, POR, PAW, S, StI. The paper used a system for assessing the physical parameters of soil within the range from 0 to 4. On the basis of the research, it was found that the best parameters of soil quality occurred in the surface horizons and increased with depth. The SPQI value calculated for the 0–60 cm Technosol layer was 0.51, which indicates good soil parameters.

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Assessment of Corrosion Phenomena of Hydromechanical Fittings and Elements of Excavation Support Under the Conditions of Active Mine Exploitation

63%

Ciosmak M. , Parzniewski T.

Journal of Ecological Engineering

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2023

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tom Vol. 24, nr 5

337--345

EN

The paper presents the results of observations and research conducted in the Lublin Coal Basin (LCB), particularly during active coal mining. The mining technology is characterized by the extraction of usable minerals using underground methods. The safety of the mining operation, both for the people working there and the efficiency of the machinery, requires the use of excavation protection, as well as dewatering of geological layers lying above the zone of the mining operation. The quality of water and air as well as the materials used in the mine create the conditions conducive to corrosion. The duration of contact with the conditions conducive to corrosion and erosion is also important. While working under load, elements of the excavation lining and hydromechanical fittings are exposed to the formation of material defects, which can lead to the occurrence of emergency situations or even their destruction. The authors identify the phenomena conducive to corrosion and indicate the need for their further investigation.

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Petrographic study of selected sculptural works of Jan Michałowicz from Urzędów

63%

Ciosmak M. , Rzęsa P.

Budownictwo i Architektura

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2018

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tom Vol. 17, nr 3

201--218

EN

Nowadays, in order to determine whether given rock properties make it useful for specifi c purposes, the material is examined using relevant test equipment. At the times of Jan Michałowicz, any knowledge in this respect was transmitted by the master to his apprentices, based on the master’s experience. The artist used domestic rock raw materials to sculpt monuments commemorating important persons who were his contemporaries. For the petrographic analysis, the authors selected the most distinguishable works of the artist, which he signed or which are most likely to have been sculpted by him. The authors analysed the materials used by the artist to carve specifi c elements of his works, as well as rock raw materials in terms of their historical and contemporary properties. Consequently, the petrographic study allowed to describe the rocks in greater detail, as well as their properties useful for sculpture purposes, and their durability. Artistic qualities helped determine the sources of stones used by Jan Michałowicz during his projects. These include the quarries near Pińczów (limestone), Kunów (sandstone), Bolechowice (marble), Żurawno (alabaster) and initially quarries in Hungary. The discussed works of Jan Michałowicz provide firm grounds for acknowledging the artist as the leading co-founder to Polish Renaissance art.