Temat: fuel flexibility - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Impact of raw liquid natural gas composition on combustion properties and emission characteristic
Autorzy:: Czyżewski, Paweł
Ślefarski, Rafał
Jójka, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/2204069.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: toxic compounds
fuel flexibility
liquid natural gas
NO emission
Opis:: The article presents the results of numerical and analytical investigations of the influence of raw liquid natural gas (LNG) composition on parameters characterizing the combustion process. The high content of higher hydrocarbons influences the thermodynamic combustion process described with parameters like the adiabatic flame temperature, laminar flame speed and ignition delay time. A numerical study of the impact of LNG fuels on emission characteristics using the Cantera code has been performed. Results have shown that the change of grid natural gas to some types of liquid natural gas can result in an incomplete combustion process and an increase of emission of toxic compounds such as carbon monoxide and unburned hydrocarbons. For all investigated fuels the laminar flame speed rises by about 10% compared to natural gas, while the adiabatic flame temperature is nearly the same. The ignition delay time is decreased with an increase of ethane share in the fuel. The analysis of chemical pathways has shown that hydrogen cyanide and hydrogen formation is present, particularly in the high temperature combustion regimes, which results in an increase of nitric oxide molar fraction in flue gases by even 10% compared to natural gas. To summarize, for some applications, liquid natural gases cannot be directly used as interchangeable fuels in an industry sector, even if they meet the legal requirements.
Źródło:: Archives of Thermodynamics; 2023, 44, 1; 3--21
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: IMOR survey vessel diesel-electric system advantages
Autorzy:: Hac, B.
Ossowski, K.
Powiązania:: https://bibliotekanauki.pl/articles/244307.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: survey vessel
diesel-electric system
fuel consumption
operational flexibility
Opis:: (How diesel-electric system improves reliability, operational flexibility and economy of the survey vessel IMOR) IMOR was built for Maritime Institute of Gdansk as a multi -purpose shallow water survey and ROV support twin-hull vessel. It is configured and capable of performing a range of tasks, such as: hydrographic and geophysical operations, bottom and pipeline inspection, etc. Its small size, small draught, relatively high power and great flexibility of possible applications makes it ideal for work on shallow waters and offshore projects starting onshore. It is equipped with diesel-electric propulsion system that consists of: 3 generator sets, 2 dual azipod aft active rudders - propellers, 2 dual waterjet bow thrusters. These units are powered by electric motors controlled by helmsman stand and DP system. First year of service has proven the project success. In contrast to conventional construction, both fuel consumption and pollution discharges have been reduced substantially. Additionally, manoeuvring and maintenance of the vessel has been improved. A great advantage of such system is the use of sufficient number of auxiliary diesel engines; consequently operation of all engines at a time is avoided. During idle operation or reduced speed of the vessel, it is sufficient to connect only one or two auxiliary generators which, in return, will be operated at an optimum capacity and efficiency. On demand, high speed and operation of all vessel auxiliary generators can be achieved in a few seconds. This flexibility enables substantial energy-savings and exploitation cost advantages. Other benefits may be summarized as follows: high survivability, reduction of noise and vibration, improved operational flexibility and reliability, increased flexibility and adaptability for different kind of survey works, increased space available, reduced manning and logistics.
Źródło:: Journal of KONES; 2007, 14, 4; 113-118
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The impact of air filter on operational properties of engine with the common rail fuel supply system
Autorzy:: Gołębiewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/241554.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: air filter
operational properties of engine
engine flexibility
specific fuel consumption
torque
effective power
Opis:: The objective of this research project was to determine the percentage impact of dry-medium air filter being used in Fiat Multijet 1.3 JTD engine on its operational properties (engine flexibility and specific fuel consumption). Experiments were performed according to the requirements of research methods specified in the piston combustion engine standard in force. In order to make comparisons, operational parameters of the power unit (torque, effective power and specific fuel consumption) were measured with dry-medium air filter (with a new filter element) being fitted and with air filter being removed. Each point of respective characteristic curves was determined based on four measurements as their mean value. Also boost pressure, which could be of importance for results, was considered in the experiments. However, the degree of EGR valve lift, the operation of which could also appear to be important, was not taken into account. For each measuring point of respective characteristic curves, the ranges of measurement uncertainties were determined. Expanded standard uncertainties were calculated based on the Guide to the Expression of Uncertainty in Measurement. The experiments being carried out allowed concluding that the engine with air filter was less flexible by approx. 20% when compared to that without air filter, whereas its specific fuel consumption was greater by approx. 9%. The degree of air filter pollution affects its flow resistance and, which is related to this, engine torque and its effective power as well as its flexibility decrease but fuel consumption increases
Źródło:: Journal of KONES; 2013, 20, 1; 103-109
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analiza parametrów energetycznych ciągnika Ursus 1134
Analysis of energy parameters of tractor Ursus 1134
Autorzy:: Kamiński, J. R.
Powiązania:: https://bibliotekanauki.pl/articles/289552.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: ciągnik rolniczy
silnik
elastyczność
parametry energetyczne
zużycie paliwa
tractor
engine
flexibility
energetic parameters
fuel consumption
Opis:: Celem pracy była ocena energetyczna ciągnika U1134 na tle innych tego typu ciągników zagranicznymi oferowanych na polskim rynku. W porównaniu z ciągnikami importowanymi silnik ciągnika U1134 cechuje: jednostkowe zużycie paliwa dla mocy maksymalnej 258,6 g*kWh-1 (ciągniki importowane od 225,0 do 273 g*kWh-1), praca na jednostkę paliwa dla mocy maksymalnej 3,2 kWh*dm-3 (ciągniki importowane 3,1 do 3,7 kWh*dm-3), elastyczność momentu obrotowego 1,22 (ciągniki importowane 1,27 do 1,41), elastyczność prędkości obrotowej silnika 1,37 (ciągniki importowane 1,46 do 1,63), elastyczność silnika 1,67 (ciągniki importowane 1,86 do 2,29). Parametry energetyczne ciągnika (silnika) uzyskane w wyniku tego typu badań pozwalają na ocenę nasycenia energetycznego ciągnika, jego energochłonności oraz przystosowania do zmiennych warunków pracy, tym samym przystosowania do zmiennych obciążeń i zmiennej prędkości obrotowej. Jednostkowe zużycie paliwa ciągnika U1134 kształtuje się na poziomie średniej dla ciągników importowanych do Polski, pozostałe parametry poniżej najniższych wartości dla ciągników importowanych.
The aimof research was to determine of energy parameters of the engine. Tractor's (engines) energy parameters, which were observed during the tests, can estimate tractor's power-intensity, its energy consumption and adaptation to different working conditions. It means we can estimate adaptation to changeable load and changeable rotary speed. The engine of U1134 tractor is characterised by: specific fuel consumption for maximum power 258,6 g*kWh-1, specific energy for maximum power 3,2 kWh*dm-3, flexibility of torque 1,22; flexibility of engine's rotary speed 1,37; engine flexibility 1,67.
Źródło:: Inżynieria Rolnicza; 2007, R. 11, nr 3 (91), 3 (91); 67-73
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

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