Implementing the mathematical model of the throughput of compressor station aggregates

The main aim of the European union energy policy is to ensure a continuous supply of natural gas for the member states. The Russian gas is transported through the Belarus, Ukraine, Slovakia (SR) and Czech Republic to Germany. This article shortly describes the transit system of Slovakia and compressor station KS1 – Vel'ké Kapušany. The throughput of this compressor station plays an important role in gas transport, because this station is the entry to the transit system of SR. To find the best combination of the aggregates used in gas transport a simulation algorithm was devised. We present the architecture of this simulation software together with the description of its development phases. The software was evaluated against data gained from the KS1 compressor station operation. The combinations of aggregates were found as dependent on inlet pressure, ambient temperature and compression ratio

EFFECT OF TEMPERATURE DISTRIBUTION AROUND PIPELINES FOR TRANSPORTATION OF NATURAL GAS ON ENVIRONMENT

The article shortly presents in the first part the transit system of Slovakia, through that the natural gas flows to Czech Republic, Austria and Germany. The compressor station KS1 – Veľké Kapušany is also described. The throughput of this compressor station plays an important role, because this station is the entry to the transit system of the Slovak Republic. In the second part of the presentation shown are the results from the software application for finding the best combination of the aggregates used in gas transport. The theoretical foundation of the change of the temperature distribution around the pipeline and its impact upon the environment is described in the present paper

Halláscsökkenés és fülzúgás vizsgálata 2-es típusú cukorbetegekben

Introduction: Hearing impairment is one of the most frequent chronic health issue. The incidence of hearing impairment and tinnitus increases with age. Aim: The aim of the authors was to determine the prevalence of hearing impairment and tinnitus in type 2 diabetic patients and to examine the possible associations between hearing impairment and/or tinnitus and increased HbA1c levels. Methods: 103 patients with type 2 diabetes (47 men, 56 women; age, 61.6+/-10.3 years, mean+/-SD; range, 33-88 years) evaluated at the 2nd Department of Medicine, Semmelweis University were enrolled in this study and the results were compared to those obtained from 589 type 2 diabetic (253 men, 336 women; age, 55.4+/-11.0 years, mean+/-SD; range, 26-97 years) and 15 622 non-diabetic patients (7002 men, 8620 women; age, 55.1+/-11.1 years, mean+/-SD; range, 26-98 years) who participated in a comprehensive health screening programme in Hungary. Hearing impairment was determined using the Interacoustics model AS608 screening audiometer in all patient groups. Tinnitus was evaluated with questionnaire. Results: It was found that hearing impairment and/or tinnitus occurred in a very high proportion of type 2 diabetic patients evaluated at the 2nd Department of Medicine, Semmelweis University (80% of cases) as compared to type 2 diabetic (34% of cases) and non-diabetic patients (14% of cases) enrolled in the national health screening programme. There was no significant correlation between increased HbA1c levels and hearing impairment or tinnitus in type 2 diabetic patients. Conclusion: These results suggest that the prevalence of hearing impairment and tinnitus is higher and develop at an earlier age in patients with type 2 diabetes. The results indicate a high prevalence of hearing impairment and tinnitus in type 2 diabetic patients. Orv. Hetil., 2013, 154, 363-368

EFFECT OF TEMPERATURE DISTRIBUTION AROUND PIPELINES FOR TRANSPORTATION OF NATURAL GAS ON ENVIRONMENT

The article shortly presents in the first part the transit system of Slovakia, through that the natural gas flows to Czech Republic, Austria and Germany. The compressor station KS1 – Veľké Kapušany is also described. The throughput of this compressor station plays an important role, because this station is the entry to the transit system of the Slovak Republic. In the second part of the presentation shown are the results from the software application for finding the best combination of the aggregates used in gas transport. The theoretical foundation of the change of the temperature distribution around the pipeline and its impact upon the environment is described in the present paper

MATHEMATICAL AND PHYSICAL MODEL OF THE MIXERS OF AIR/FUEL AND OXYGEN ENRICHED AIR/FUEL BURNER

The effect of mixing of natural gas with air and oxygen enriched air as the oxidising agents is described in this paper. The theoretical basics of the oxy/fuel combustion and the effect of increasing of oxygen content in the oxidising agent on the flue gas composition and theoretical temperature at natural gas combustion are briefly described. The burner of 2 kW thermal power with two types of mixing devices was designed. The mixing devices were tested using the mathematical model formulated on the basis of CFD-software and monitoring the flame temperatures on the physical models. In order to achieve a better comparison of the mixing devices, only their geometry were being modified, while the input parameters such as the mass flow of natural gas and oxidants remained the same. Using CFD modelling the different mixing chambers was also designed, of which the best results were achieved at the mixers with truncated cone shape. However, it has not been confirmed experimentally on the test apparatus

”Vi och dom” - inhyrda konsulter och ordinarie personal inom bemanningsbranschen

Syftet med uppsatsen var att behandla förhållandet mellan inhyrda konsulter och ordinarie personal. Förhållandet avsåg att mäta skillnaderna mellan dessa två anställningsformer i förtroende för de inhyrda. Målet var sedan att se om förtroendet kunde förklaras med hjälp utav upplevelsen av tillhörighet eller upplevelsen av hot. Undersökningen utfördes med en kvantitativ ansats och resultatet togs fram med hjälp av SPSS, genom en linjär regression som gjordes på sekundärdata gjord av en samling forskare på Mittuniversitetets samhällsinstitution. Urvalet bestod av 137 svarande på en enkät som skickats till sammanlagt 237 personer, vilket gav en svarsfrekvens på 50,2%. Utskicket gjordes till tre olika företag där det fanns inhyrd kompetens. Resultatet visade att det fanns skillnader mellan anställningsformerna på förtroende för de inhyrda. De inhyrda hade högre grad av förtroende till sig själva än vad de ordinarie hade för de inhyrda. Vidare kunde slutsatser dras till att graden av förtroende kunde förklaras med upplevd tillhörighet men inte i någon större utsträckning med hot. Det vill säga tillhörighet påverkade förtroendet men inte hotbilden

Cytological Studies on Punctuates (by carbon-particle phagocytosis capacity) Part 3. The Carbon-Particle Phagocytosis Capacity Pleural-Fluid Phagocytes

In the study of the carbon-particle phagocytosis capacity of the pleural-fluid phagocytes of mice and rabbits with tissue culture the author arrived at the following conclusions: 1. The essential phagocytosis behaviors of pleural-fluid phagocytes in mice resemble those of ascitic phagocytes, and moreover, taking other findings into consideration, it seems that the two are the same kind of cells, namely, the cella closely related to monocytes. Only the pleural-fluid phagocytes of mice, from their cell functions such as phagocytosis capacity and motility, are more undifferentiated than phagocytes. 2. The phagocytosis behaviors of the pleural-fluid phagocytes in rabbits almost coincide with those of the ascitic phagocytes, and the cell functions of the two hardly differ from one another