Temat: specific consumption - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Specific energy consumption – the comparison of belt conveyors
Autorzy:: Suchorab, Natalia
Powiązania:: https://bibliotekanauki.pl/articles/89009.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: belt conveyor
energy efficiency
specific energy consumption
Opis:: Belt conveyors (BCs), because of their high efficiency, are widely used for bulk material handling in the mining industry. However, due to the high level of conveyors' energy consumption, the belt conveyor systems generate a large part of mining costs. Therefore, the current solutions mostly focus on implementing new management strategies, which find energy consumption as a key indicator in designing belt conveyor systems. Belt conveyor equipment selection, conveying systems, operation, applied mining technology are considered to be areas where improvement of belt conveyors' energy efficiency may be achieved. Moreover, they can be used to implement novel standards for BC equipment and the proposal of defining new quality standards and creating BCs' classification has been already outlined. The main idea of the paper is to compare the values of specific energy consumption (SEC) of BCs with regard to the inclination angle of a conveyor route which results from technological needs. The multiple regression is used to find a relationship between two basic independent variables – the volume of transported material and conveyor's inclination angle – and a dependent variable (SEC). The procedure enables to determine the value of SEC which is required for lifting the material. Presented results prove that the value of SEC required for lifting the material is crucial for the interpretation of the SEC value when it comes to energy efficiency comparison.
Źródło:: Mining Science; 2019, 26; 263-274
2300-9586
2353-5423
Pojawia się w:: Mining Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Integration of energy saving with lean production in a food processing company
Autorzy:: Salah, Sameh A.
Mustafa, Ahmad
Powiązania:: https://bibliotekanauki.pl/articles/2052198.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: lean production
seven wastes
specific energy consumption
Opis:: Increasing the energy efficiency has become a key concern in manufacturing companies due to the increased energy costs and the environmental impacts. More efficient energy saving can make the most economic contribution towards solving these problems in the short run. Companies’ governments are striving to identify the most effective measures to improve energy efficiency in manufacturing processes. The specific energy consumption (SEC) is a key performance indicator used to measure the energy consumed per product. Therefore, an improvement of this value contributes to decouple of economic growth from related increase of energy consumption. This paper highlights the needs of manufacturing companies for integrating energy performance in production management. This work focuses on studying the impact of implementing lean production concepts on decreasing the SEC in a food processing organization. The reduction of SEC can be achieved by increasing the total efficiency of the production line. Implementing the lean production methodology by using energy management model achieve an increase in the production output. The lean production used to eliminate all kinds of waste in production, while using the same input resources such as raw material and energy. The main source of waste found on the production line is the defective product and time waste during changeover and manual process. The achieved results showed that the SEC improved by 15.1% by reducing the lean wastes in the production line. Implementation of lean methodology has a great impact on improving the energy saving by reducing the specific energy consumption in the organization. The SEC is a key performance indicator used to measure the efficiency of a production line or a machine in relation to its production. Energy management model is useful in identifying the area of improvement and the energy saving measure.
Źródło:: Journal of Machine Engineering; 2021, 21, 4; 118-133
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Examinations of effective efficiency of a car engine in non-stationary work conditions from torque load
Autorzy:: Ubysz, A.
Powiązania:: https://bibliotekanauki.pl/articles/245343.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: engine performance maps
specific fuel consumption
effective efficiency
Opis:: Measuring method and calculations of the impact of non-stationary work conditions of car engine torque load upon its effective efficiency have been presented in the paper. The obtained results have been compared to the already achieved results. The applied method of calculation balance and the consumed fuel enabled the writer of the paper to calculate the value of the change of unitary fuel consumption at a work point on engine performance map. The carried out examinations focus on measurements at one measuring length and so the rate of torque load at each of the four gear box ratio (2-5) can be controlled by constant final velocity of driving or by shifting or extending the measuring length against the lowest point ( the measuring length is 'U'-shaped). Finding the right solution to this problem will allow elaborating the calculation algorithm of engine effective efficiency for the examined range of engine performance maps for changeable, non-stationary work conditions. The results make it ąuite explicit that non-stationary work conditions from the engine speed and the engine load impair the effective efficiency of the engine at work in particular gears. Non-stationary mode of engine operation is essential for the higher values of gear box ratio whereas for lower values the engine load really matters.
Źródło:: Journal of KONES; 2009, 16, 4; 463-468
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Mathematical description of the external characteristics of compression-ignition engine
Autorzy:: Stoeck, T.
Powiązania:: https://bibliotekanauki.pl/articles/245845.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: polynomial interpolation
specific fuel consumption
exhausts gas smokiness
Opis:: In this paper is presented a calculation procedure based on Lagrange's interpolation formuła which has been used for describing the external characteristics of compression-ignition engine of the 359 type. The characteristic curves of specific fuel consumption and exhaust gas smokiness were chosen as an example, which had been obtained during examinations on engine test bed for a drive unitfuelled with four types of fuel. Measurements were carried out on a standard engine test bed which is part of laboratory facilities of the Department of Automotive Vehicles Operation, Western Pomeranian University of Technology in Szczecin. The study object was an unsupercharged four-stroke engine of domestic production of the 359 type. It is a six-cylinder compression-ignition drive unit with direct fuel injection system. Interpolating polynomials determined analytically for respective characteristics have been presented in the graphical form, while experimental examination results necessary for obtaining them have been additionally tabulated. The presented methodology allows simplification of particular experiment stages by giving possibility to estimate analytically the missing data and with preservation of a minimum number of measuring points. With small corrections, it may be used in similar examinations on other engine test beds. Its application should support the planning of particular experiment stages but does not, in any case, replace it since determination of engine characteristic curves is possible through research only.
Źródło:: Journal of KONES; 2010, 17, 2; 445-450
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Impact voltage deviation on the technological characteristics of crushers
Autorzy:: Savchenko, V.
Sinyavsky, A.
Powiązania:: https://bibliotekanauki.pl/articles/410666.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: crusher
electric drive
voltage deviation
productivity
specific consumption of energy
power loss
grinding module
Opis:: The results of research on the influence of voltage deviation on the technological characteristics and energy losses in electric drive of the crusher are presented. Dependence of the productivity, of specific consumption of energy and grinding module on the voltage are established.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2013, 2, 2; 37-40
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Identyfikacja rzeczywistych warunków eksploatacji samochodu z użyciem energochłonności jednostkowej
Identification of real vehicle operating conditions with the use of specific energy consumption
Autorzy:: Kropiwnicki, J.
Powiązania:: https://bibliotekanauki.pl/articles/263419.pdf
Data publikacji:: 2010
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: eksploatacja
energochłonność jednostkowa
zużycie paliwa
exploitation
fuel consumption
specific energy consumption
Opis:: W pracy przedstawiono autorska metodę określania warunków pracy pojazdu za pomocą parametru zwanego energochłonnością jednostkową (dla fazy napędowej), który uwzględnia ilość energii wydatkowanej do napędu pojazdu, jego masę oraz przejechany dystans w fazie napędowe. Przyjęto, ze energia wydatkowana na napęd pojazdu wynika zarówno z warunków drogowych, jak również temperamentu kierowcy i czynniki te są tratowane jako równoważne. Miejsce eksploatacji (intensywność ruchu) oraz sposób prowadzenia pojazdu mogą być w zaproponowanej metodzie jednoznacznie opisane za pomocą funkcji gęstości rozkładu energochłonności jednostkowej. W pracy przedstawiono analizę wpływu masy pojazdu na wartość średnią energochłonności jednostkowych w fazie napędowej dla wybranych syntetycznych testów jezdnych, a także profili prędkości oraz zmian wysokości zarejestrowanych w warunkach rzeczywistego ruchu na terenie miasta Gdańska, W pracy przedstawiono także przykłady identyfikacji warunków eksploatacji pojazdu w wybranych warunkach oraz wpływ średniej energochłonności jednostkowej na przebiegowe zużycie paliwa w fazie napędowej.
Car operating conditions are identified in this work by the energy consumed per distance covered and the vehicle mass (specific energy consumption), which contains impact of the traffic conditions as well as the style of driving. The factors mentioned above have influence on the amount of mechanical energy transferred to the driving wheels. The traffic and the style of driving can finally be described with a probability density function of the parameter: specific energy consumption. An influence of the vehicle mass on the specific energy consumption for selected synthetic tests as well as registered drives in the conditions of real traffic in the city of Gdansk have been presented. Examples of vehicle operating conditions identification as well as an influence of the average specific energy consumption on the operating fuel consumption in the propulsion phase have been presented.
Źródło:: Archiwum Motoryzacji; 2010, 3; 153-166
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Engine performance maps in nonstationary operating conditions of car engine
Autorzy:: Ubysz, A.
Powiązania:: https://bibliotekanauki.pl/articles/245565.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: B.S.F.C. map
specific fuel consumption
effective efficiency
Opis:: A method is proposed in the paper to calculate effective efficiency of an engine in nonstationary operating conditions. A reference point for this method is the effective efficiency of the engine derived from its performance map. A research methodology has been developed to this end, the basis of which consists of measurements and calculations of the to tal energy efficiency of a car motion in a variable driving cycle. In order to determine the impact of the road grade, measurements were performed along a geodetically described roadsection in two traffic directions: "up " and "down ". The adopted research scheme allows covering the area of the engine performance map being of interest to us with measuring points. The mean value or rotational speed and its change in unit oftime were adopted as the leading parameters which have a dominating influence on, and result in a reduction of the effective efficiency of the engine. To improve the accuracy of calculations, the variable driving cycle consists of driving phases and idle running. The volume of fuel consumed, not accounted for in the driving phases, being the difference between the calculated and consumed fuel, is a measure of reduction of the effective efficiency of the engine, whilst the unit power of additional motion resistance of the vehicle (a*ni) is a leading parameter in the analyses of the calculation results.
Źródło:: Journal of KONES; 2009, 16, 3; 455-463
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Experimental investigation on performance of a spark ignition engine runs with alcoholic blend-gasoline
Autorzy:: Ahmed, H. A.
Powiązania:: https://bibliotekanauki.pl/articles/243048.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: methanol
ethanol
butanol
compression ratio
specific fuel consumption
exhaust gas temperature
performance
Opis:: In this paper performance resulted from a single cylinder spark-ignition engine fuelled with 20% by volume of methanol, ethanol, and butanol was studied and compared to gasoline. The experiments were conducted at variable speed and maximum torques. The conditions of stoichiometric air–fuel ratio at wide-open throttle were used. The tests were perfumed at higher useful compression ratio of the used Iraqi gasoline. The test results show that the higher compression ratio for the tested gasoline was 7.5:1. So an Iraqi conventional gasoline has engine HUCR=7.5:1 and its OST= 19 ºBTDC, this compression ratio can be considered low. Adding 20% of alcoholic blends by volume to gasoline improved the engine performance. Within the tested speed range, alcoholic blends produced higher brake powers, volumetric efficiency and thermal efficiency. In addition, it resulted in lower exhaust gases temperatures. The brake specific fuel consumption of the tested alcoholic blend was higher than that for gasoline.
Źródło:: Journal of KONES; 2015, 22, 3; 249-256
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: The energy consumption during the birch tree sap concentration process using the reverse osmosis system
Autorzy:: Wawer, J.
Bilek, M.
Sosnowski, S.
Powiązania:: https://bibliotekanauki.pl/articles/410787.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:: specific energy consumption
birch tree sap
reversed osmosis
soft drink
natural products
Opis:: Birch tree sap was concentrated by mens of the reversed osmosis technique. The energy consumption in a small-scale pilot apparatus was estimated. The threshold value for the water removal above which the specific energy consumption significantly increased was identified. Below the threshold value the reversed osmosis had low energy demand and could be an attractive method for the production of birch tree sap-based beverages.
Źródło:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2018, 7, 1; 151-155
2084-5715
Pojawia się w:: ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Energochłonność procesu rozdrabnia pszenicy ozimej o różnej szklistości przy stosowaniu gniotownika i śrutownika walcowego
Energy consumption at the grain wheat crushing process for various glaze on used crusher and roller crushing
Autorzy:: Wiercioch, M.
Niemiec, A.
Powiązania:: https://bibliotekanauki.pl/articles/289524.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: rozdrabnianie
ziarno
rozdrabniacz walcowy
energochłonność
grain
crushing
roller feed mill
specific energy consumption
Opis:: W pracy porównywano wyniki zużycia energii jednostkowej w czasie rozdrabniania ziarna trzech odmian pszenicy ozimej o szklistości - 29,0; 53,6 i 83,3%. Badania przeprowadzono wykorzystując gniotownik i śrutownik walcowy. Wykazano wpływ rodzaju użytego urządzenia rozdrabniającego i szklistości na energochłonność procesu rozdrabniania. Wzrost zużyciu energii jednostkowej dla ziarna odmiany półszkilstej i szklistej (szkl. 53,6 i 83,3%) w stosunku do odmiany mączystej (szkl. 29%) wynosił odpowiednio ok. 30 i 60%.
In the paper presented the results of studies the energy consumption on a crusher a two-roller crushing mill. The testing execution for three cultivars wheat for various grain glaze. It was stated that the specific energy consumption depended on used crushing attachment and glaze grain wheat.
Źródło:: Inżynieria Rolnicza; 2006, R. 10, nr 11(86), 11(86); 511-518
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

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