Marek ŻUKOWICZ, Michał MARKIEWICZ
The proposal of a evolutionary strategy generating the data structures on a horizontal tree for test
DOI 10.12914/MSPE-01-03-2016
Abstract: The aim of the article is to present a mathematical definition of the object model, that is known in computer science as TreeList and to show application of this model for design evolutionary algorithm, that purpose is to generate structures based on this object. The first chapter introduces the reader to the problem of presenting data using the TreeList object. The second chapter describes the problem of testing data structures based on TreeList. The third one shows a mathematical model of the object TreeList and the parameters, used in determining the utility of structures created through this model and in evolutionary strategy, that generates these structures for testing purposes. The last chapter provides a brief summary and plans for future research related to the algorithm presented in the article.
Keywords: TreeList object, evolutionary algorithms, evolutionary strategy, software testing
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Grażyna A. PŁAZA, Dorota WANDZICH
Biorefineries - new green strategy for development of smart and innovative industry
DOI 10.12914/MSPE-02-03-2016
Abstract: Ecological engineering or ecotechnology is defined as the design of sustainable production that integrate human society with the natural environment for the benefit of both. In order to reach the goal of sustainability therefore important that bioproduct production systems are converted from to natural cycle oriented. In natural cycles there are not waste, but products are generated at different stages of the cycle. The ecotechnology creates a sustainable bioeconomy using biomass in a smart and efficient way. The biorefining sector, which uses smart, innovative and efficient technologies to convert biomass feedstocks into a range of bio-based products including fuels, chemicals, power, food, and renewable oils, currently presents the innovative and efficient bio-based production can revitalize existing industries. The paper presents the concept of biorefinery as the ecotechnological approach for creating a sustainable bioeconomy using biomass in a smart and efficient way.
Keywords: ecological engineering, biorefinery, biomass, bioprocess, industrial metabolism, renewableand sustainable resources
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Paweł WRONA, Zenon RÓŻAŃSKI, Grzegorz PACH, Lech DOMAGAŁA
The application of a jet fan for the control of air and methane streams mixing at the excavations cross - the results of numerical simulations
DOI 10.12914/MSPE-03-03-2016
Abstract:The paper presents the results of numerical simulations into the distribution of methane concentration at the intersection of two excavations with a fan (turned on) giving the air stream to the area of the crossing. Assumed case represents emergency situation related to the unexpected flow of methane from an excavation and its mixing with fresh air. It is possible when sudden gas outburst takes place, methane leaks from methane drainage system or gas leaks out the pipelines of underground coal gasification devices. Three options were considered – corresponding to three different speeds of the jet fan. They represent three stages of fan work. First – low air speed is forced by a pneumatic fan, when electricity is cut off after high methane concentration detection. Medium speed can be forced by pneumatic-electric device when methane concentration allows to turn on the electricity. Third, the highest speed is for electric fans. Simulations were carried out in the Fire Dynamics Simulator (FDS) belongs to the group of programs Computational Fluid Dynamics (CFD). The governing equations are being solved in a numerical way. It was shown that proposed solution allows partial dilution of methane in every variant of speed what should allow escape of the miners from hazardous area.
Keywords: CFD simulation, methane, gas hazard, jet fan
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Nikodem SZLĄZAK, Dariusz OBRACAJ, Marek KORZEC
Influence of applying additional forcing fans for the air distribution in ventilation network
DOI 10.12914/MSPE-04-03-2016
Abstract: Mining progress in underground mines cause the ongoing movement of working areas. Consequently, it becomes necessary to adapt the ventilation network of a mine to direct airflow into newly opened districts. For economic reasons, opening new fields is often achieved via underground workings. Length of primary intake and return routes increases and also increases the total resistance of a complex ventilation network. The development of a subsurface structure can make it necessary to change the air distribution in a ventilation network. Increasing airflow into newly-opened districts is necessary. In mines where extraction does not entail gas-related hazards, there is possibility of implementing a push-pull ventilation system in order to supplement airflows to newly developed mining fields. This is achieved by installing subsurface fan stations with forcing fans at the bottom of downcast shaft. In push-pull systems with multiple main fans, it is vital to select forcing fans with characteristic curves matching those of the existing exhaust fans to prevent undesirable mutual interaction. In complex ventilation networks it is necessary to calculate distribution of airflow (especially in networks with a large number of installed fans). In the article the influence of applying additional forcing fans for the air distribution in ventilation network for underground mine were considered. There are also analysed the extent of overpressure caused by the additional forcing fan in branches of the ventilation network (the operating range of additional forcing fan). Possibilities of increasing airflow rate in working areas were conducted.
Keywords: underground mine ventilation, ventilation network, air distribution in ventilation network, intake air flow, main fans, additional forcing fans
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Dariusz TARNAPOWICZ, Sergiej GERMAN-GALKIN
The use of generating sets with LNG gas engines in “Shore to Ship” systems
DOI 10.12914/MSPE-05-03-2016
Abstract: The main sources of air pollution in ports are ships, on which electrical energy is produced in the autonomous generating sets Diesel-Generator. The most effective way to reduce harmful exhaust emissions from ships is to exclude marine generating sets and provide the shore-side electricity in “Shore to Ship” system. The main problem in the implementation of power supply for ships from land is connected with matching parameters of voltage in onshore network with marine network. Currently, the recommended solution is to supply ships from the onshore electricity network with the use of power electronic converters. This article presents an analysis of the „Shore to Ship” system with the use of generating sets with LNG gas engines. It shows topologies with LNG – Generator sets, environmental benefits of such a solution, advantages and disadvantages.
Keywords: „Shore To Ship” system, LNG generating sets
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Andrzej ZYGMUNIAK, Violetta SOKOŁA-SZEWIOŁA
The unification of the code lists provided within the data model originating from the INSPIRE technical guidelines and the ones provided for GESUT databases in the context of potential exploitation in the mining industry
DOI 10.12914/MSPE-06-03-2016
Abstract: This study is aimed at exposing differences between two data models in case of code lists values provided there. The first of them is an obligatory one for managing Geodesic Register of Utility Networks databases in Poland [9] and the second is the model originating from the Technical Guidelines issued to the INSPIRE Directive. Since the second one mentioned is the basis for managing spatial databases among European parties, correlating these two data models has an effect in easing the way of harmonizing and, in consequence, exchanging spatial data. Therefore, the study presents the possibilities of increasing compatibility between the values of the code lists concerning attributes for objects provid- ed in both models. In practice, it could lead to an increase of the competitiveness of entities managing or processing such databases and to greater involvement in scientific or research projects when it comes to the mining industry. More- over, since utility networks located on mining areas are under particular protection, the ability of making them more fitted to their own needs will make it possible for mining plants to exchange spatial data in a more efficient way.
Keywords: GESUT, INSPIRE, database, interoperability, data harmonization
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Andrzej ADAMKIEWICZ, Marek BARTOSZEWSKI, Martin KENDRA
Analysis of consequences of using gas fuels for running auxiliary ship boilers in the light of contemporary environmental protection requirements
DOI 10.12914/MSPE-07-03-2016
Abstract: The article justifies the application of gas fuels for supplying auxiliary ship boilers. It presents legal regulations on mari- time environmental protection areas and their requirements which are in power. It shows the chronology of introduced limitations on sulphur and nitrogen dioxide emissions and thresholds of carbon dioxide emission reduction expressed by EEDI (Energy Efficiency Design Indicator) and EEOI (Energy Efficiency Operational Indicator). Ways to decrease the values of EEDI and EEOI in the ship energy effectiveness management have been shown. Consequences of replacing marine fuels with LNG for running auxiliary ship boilers have been considered thoroughly, taking into account ecological, construction- al, operational, procedural and logistic limitations as well as economic consequences. The summary shows the influence of particular consequences of using LNG for running boilers on the methods of maintenance of auxiliary boilers.
Keywords: auxiliary boilers, environmental protection, natural gas, marine fuel
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Erika SUJOVÁ, Helena ČIERNA, Michał MOLENDA
Evaluation of human reliability in selected activities in the railway industry
DOI 10.12914/MSPE-08-03-2016
Abstract: The article focuses on evaluation of human reliability in the human – machine system in the railway industry. Based on a survey of a train dispatcher and of selected activities, we have identified risk factors affecting the dispatcher‘s work and the evaluated risk level of their influence on the reliability and safety of preformed activities. The research took place at the authors‘ work place between 2012-2013. A survey method was used. With its help, authors were able to identify selected work activities of train dispatcher’s risk factors that affect his/her work and the evaluated seriousness of its in- fluence on the reliability and safety of performed activities. Amongst the most important finding fall expressions of un- clear and complicated internal regulations and work processes, a feeling of being overworked, fear for one’s safety at small, insufficiently protected stations.
Keywords: Human Reliability, Human Error, Performance Influencing Factors, Survey
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Zbigniew MATUSZAK, Michał BARTOSZ, Dalibor BARTA
The application of selected network methods for reliable and safe transport by small commercial vehicles
DOI 10.12914/MSPE-09-03-2016
Abstract: In the article are characterized two network methods (critical path method – CPM and program evaluation and review technique – PERT). On the example of an international furniture company’s product, it presented the exemplification of methods to transport cargos (furniture elements). Moreover, the study showed diagrams for transportation of cargos from individual components’ producers to the final destination – the showroom. Calculations were based on the trans- portation of furniture elements via small commercial vehicles.
Keywords: network methods, road transport, transportation time
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Ryszard MIELIMĄKA, Justyna ORWAT, Ewa MACIEJOWSKA-FIGIEL
Conception of the track system for „Dębieńsko 1” mining plant
DOI 10.12914/MSPE-10-03-2016
Abstract: This article presents two concepts of site development for the „Dębieńsko 1” mining plant including plans for the track system. The first plan was created in 2013 year and mainly assumed the renovation of railway infrastructure, without changing its shape and configuration. In 2014 year it was resigned from realization of the first conception and there was proposed the second plan. It included changes in the existing track system and project of the new system of excavated raw material haulage. This system is successfully using in the USA and provides the better work productivity of a shunting locomotive. In this article also were indicated the advantages and the disadvantages of solutions proposed in the two projects of site development plans. It was denoted the project that has ultimately been chosen with the justifi- cation of choice.
Keywords: „Dębieńsko 1” mining plant, area development planning, site development project, output haulage, track system
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