Wyniki wyszukiwania - BazTech

1

Operational energy footprint of vehicle

Sitnik Lech J.

Combustion Engines

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2021

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R. 60, nr 3

37--40

EN

One of the many important challenges of the modern world is the greenhouse effect of CO2. It is necessary to implement solutions that will eliminate it. Since the easiest way to eliminate the greenhouse effect is to reduce hydrocarbons fuel consumption, it is important to evaluate the fuel (energy) consumption in long term operation. The article presents a proposal for the use of the so-called vehicle energy footprint. The method of creating such a trace is presented and illustrated with specific results of data analyzes. The data is publicly available, which means that the presented method can be independently verified. It has also been shown that the use of the method not only organizes the analyzes, but also leads to information that cannot be obtained with other methods. It therefore seems that an attractive tool has been developed for future applications.

2

Influence of climate parameters on long-term variations of the distribution of phytoplankton biomass and nutrient concentration in the Baltic Sea simulated by a 3D model

Dzierzbicka-Głowacka L., Piskozub J., Jakacki J., Janecki M., Nowicki A.

Polish Journal of Ecology

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2012

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Vol. 60, nr 4

651--666

EN

We used a 3-D coupled seaice ecological model of the Baltic Sea to investigate the influence of long-term trends in average temperature, wind speed and solar irradiance on nutrients concentration and distribution of phytoplankton. We tested the sensitivity of the model to changes of the main physical parameters such as temperature, wind speed, solar and thermal radiation performing several numerical experiments with different configurations. Discussion about the relevance of the results for the expected future climate change is provided. The calculations were done for whole Baltic Sea for the period from 2004 to 2048. The results of the numerical simulations for the different areas of Baltic Sea (nine stations: Gulf of Gdańsk, Gdańsk Deep, Gotland Deep, Bornholm Deep, Gulf of Finland, Gulf of Riga, Gulf of Bothnian, Bothnian Sea, Danish Straits) were presented. The simulations results show significant changes in phytoplankton biomass and nutrient concentration distributions, which took place in the regions where a significant increase in currents (to 100 cm s-1) was found. The results of the numerical simulations for five years (2000–2004) are consistent with in situ observations for temperature and phytoplankton (Dzierzbicka-Glowacka et al. 2011b).

3

Long term observations of a 3-span highway corrugated steel box bridge on Gniezno Bypass

Madaj A., Węgrzynowski M., Janusz L.

Archiwum Instytutu Inżynierii Lądowej

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2012

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Nr 12

197-203

EN

The paper describes 5 years of behavior of a corrugated steel box 3 span bridge with a 14.1m span. The bridge is located on Gniezno by-pass in Poland. After few months of operation road surface over the bridge showed signs of ruts. An expertise was performed to evaluate causes of rut formation and provide suggestions for repair of the bridge. Deformations of road surface, structure and foundations wer measured.

PL

Praca opisuje 5-letnie zachowanie trójprzęsłowego mostu skrzynkowego o rozpiętości 14,1 m. Most znajduje się na obwodnicy Gniezna w Polsce. Po kilku miesiącach użytkowania na powierzchni drogi nad mostem pojawiły się koleiny. Przeprowadzono badanie w celu oceny przyczyn powstawania kolein i przygotowania propozycji naprawy mostu. Dokonano pomiarów odkształceń powierzchni drogi, konstrukcji mostu oraz fundamentów.