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1999
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tom T. 4, z. 2
345-356
PL
Skałami zbiornikowymi dla wód zwykłych, mineralnych i leczniczych są warstwy łąckie. Jedno źródło ("Główne") jest trwale ujęte w formie zdroju w otwartej altanie. Ujęta woda to szczawa HCO3-Ca, Fe, Mn. Wody eksploatowane są z ujeć wierconych od 1992 roku, głównie przez Zakład "Mulico", do produkcji butelkowanych naturalnych wód mineralnych pod nazwą rynkową "Multi Vita". Wykonane w 1994 roku zdjęcie gazowe wskazuje obszary o podwyższonej koncentracji CO2 w powietrzu glebowym, głównie w obrębie doliny Muszynki, znanej z licznych przejawów wód mineralnych.
EN
Łącko strata ore the tank rocks for therapeutic, mineral and drinking water spring. One "MAIN" durable water intake is in a form of a spring in an open arbour. The intaken water is an oxalate HCO3-Ca, Fe, Mn. The water is taken from drilled intake since 1992, mostly by "Multico" Enterprise, to bottle natural mineral water called "Multi Vita". Gas-photo taken in 1944 shows an area of increased CO2 concentration at soil air, reaching mainly The Muszynka Valley, known of various mineral springs display.
2
Content available remote Use of fuel-borne reductants for NOx reduction in diesel engine
63%
EN
The method used by the authors involves reduction of nitrogen oxides by means of chemically active hydrocarbons (radicals) from the fuel. In order to obtain partially oxidized and thermally decomposed hydrocarbons, the post-injection of fuel (the injection of an additional portion of fuel) into the diesel engine cylinder during the expansion stroke was implemented. To perform this function, a special fuel supply system consisting of two injection pumps was designed. One of the pumps was injecting the main (primary) fuel dose, and the other one - the additional fuel dose. Injection of both fuel doses was accomplished by the same injector. A catalytic converter was used in the exhaust system of the one-cylindertest engine. During the tests, the fuel post-injection angle (relative to the TDC) was changed. It was found that using that method of the reducing agent dosage, the total effect of nitrogen oxide reduction was a combination of the effects obtained in the engine cylinder by Selective NonCatalytic Reduction (SNR) and the effects obtained in the catalytic converter by Selective Catalytic Reduction (SCR). In test conditions, the SNRmethod was found to be more efficient.
EN
The autoignition delay in the diesel engine, depending onthe temperature and pressurein the combustion chamber, is directly related to the cetane number of fuel. Highercetanenumbers of fuels derivedfrom crude oil resultin shorterautoignition delay times. The following considerations andthe results of tests conducted on a test engine showthat, inthe case of vegetable fuels, the knowledge of their cetanenumbers do not yield any conclusions concerning their autoignition potential at varied dieselengine workconditions.
EN
The article provides a comparative analysis of the failure force of bonded and soldered joints of steel E335. This material is used as an application in aerospace. There were examined the bonded joints with glue WK-3 and the soldered joints with brass solder. This article describes the use of two surface treatment methods of the tested sheets: the etching and abrasive blasting with specific characteristics. During those tests the failure force was compared, and the strength of bonded and soldered joints was determined. During the tests carried out on samples of joining by soldering, there was observed the destruction of joining material. In this case, the strength of the soldered joint was greater than the strength of a joining material. Due to slight differences in the values of failure forces and the strength of sheet steel E335 it can be noticed that, in the case of kinds of joints, the analysed variants of the surface treatment do not cause any significant differences in the strength of joints.
6
51%
EN
When determining the emission of detrimental pollutants in the exhaust gases, most problems are caused by the measurement of the amount of particulates emitted by diesel engines. The measurement methodology which is being currently used is determined by international regulations of EPA, ISO and ECE - R49, accepted more than 10 years ago. This methodology requires a special test stand equipped with a tunnel diluting the exhaust gases and simulating the real condition of mixing the exhaust gases with the atmospheric air. The levels of particulates emission are evaluated gravimetrically, by the accurate weighing of the particles filtered out from a sample of mixture taken in the tunnel. The construction of the test stand as well as the measurement conditions are defined in the aforementioned regulations. However, there are several important details associated with the test methodology which have not been defined precisely in the regulations or which may be adjusted freely. Such a situation reduces the possibilities of comparing the results of tests conducted in different test centres, the repeatability of test results and their objectivity. These factors are very important during engine tests (e.g. type approval tests) measuring the emission of particulates and during research and development studies. One of such imprecisely defined test conditions is the conditioning of filters used in the particulates emission tests. This issue is discussed in this paper, which is based on the tests conducted by the authors at the Cracow University of Technology.
PL
Zaprezentowano metody ograniczania emisji tlenków azotu w spalinach silnika wysokoprężnego poza obrębem cylindra. Szczególną uwagę zwrócono na możliwości stosowania tzw. selektywnej, nie katalitycznej redukcji (SNR) oraz selektywnej katalitycznej redukcji (SCR), w zależności od warunków pracy i zastosowania silnika.
EN
The paper presents the methods for limiting (outside the cylinder) the emission of nitrogen oxides with the exhaust gases of diesel engine. Particular consideration was given to the possibilities of using so-called selective, non-catalytic reduction (SNR), and selective, catalytic reduction (SCR), depending on the engine operating conditions and its application.
PL
Zaprezentowano metody ograniczania emisji tlenków azotu w spalinach silników wysokoprężnych. Pod uwagę wzięto rozwiązania, które oddziałują na przebieg procesu spalania. Rozważano zarówno wpływ parametrów konstrukcyjnych, jak i regulacyjnych silnika wysokoprężnego na emisję NOx. W podsumowaniu przedstawiono techniczne rozwiązania, które powinny zapewnić uzyskanie limitów: EURO3 i kalifornijskiego ULEV.
EN
This paper describes the methods of nitrogen oxides reduction in the diesel engine exhaust gases. Taking into consideration the techniques which have interacting on the combustion process. Discussed were the influence of the construction and setting parameters of diesel engines on the NOx emission. As a conclusions were showed the technique solutions which could permit the EURO3 and californian ULEV limits.
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