Autor: Furmanek, Mariusz. - Katalog OPAC zbiorów

Tytuł:: Hydraulic resistance analyses of selected elements of the prototype Stirling engine
Autorzy:: Furmanek, Mariusz
Kropiwnicki, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/240642.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Stirling engines
temperature distribution
hydraulic resistance
silniki Sterlinga
rozkład temperatury
oporność hydrauliczna
Opis:: The paper presents the results of simulation tests of hydraulic resistance and temperature distribution of the prototype Stirling alpha engine supplied with waste heat. The following elements were analyzed: heater, regenerator and cooler. The engine uses compressed air as a working gas. Analyses were carried out for three working pressure values and different engine speeds. The work was carried out in order to optimize the configuration of the engine due to the minimization of hydraulic resistance, while maintaining the required thermal capacity of the device. Preliminary tests carried out on the real object allowed to determine boundary and initial conditions for simulation purposes. The simulation assumes that there is no heat exchange between the regenerator and the environment. The solid model used in simulation tests includes the following elements: supply channel, heater, regenerator, cooler, discharge channel. Due to the symmetrical structure of the analyzed elements, simulation tests were carried out using 1/6 of the volume of the system.
Źródło:: Archives of Thermodynamics; 2019, 40, 3; 123-136
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Stirling engines - the state of technology development and computational models
Autorzy:: Furmanek, Mariusz
Kropiwnicki, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/2097645.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: Stirling engines
numerical models
commercial design
low-temperature sources
renewable energy sources
silniki Stirlinga
modele numeryczne
projekt użytkowy
źródła niskotemperaturowe
odnawialne źródła energii
Opis:: Stirling engines represent a technologically important solution in combined heat and power systems. Their use enables the achievement of over 90 percent efficiency in the management of the primary energy source with a very high durability of the device, mainly due to the lack of contact of the working gas with external factors and a very small number of mechanical components. The use of a Stirling engine may be equally important when applying renewable energy sources or waste heat from other processes. The first part of the work presents an overview of available commercial Stirling engine solutions. The second part of the work presents an overview of numerical models of Stirling engine operation, which enable the correct selection of the main geometrical features of the devices and the improvement of the structure in order to maximize efficiency or power.
Źródło:: Combustion Engines; 2022, 61, 1; 3--12
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Analysis of the regenerative braking process for the urban traffic conditions
Autorzy:: Kropiwnicki, Jacek
Furmanek, Mariusz
Powiązania:: https://bibliotekanauki.pl/articles/132918.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:: regenerative braking
real traffic conditions
hybrid vehicles
electric vehicles
energy consumption
route planning
hamowanie odzyskowe
rzeczywiste warunki ruchu
pojazdy hybrydowe
pojazdy elektryczne
zużycie energii
planowanie trasy
Opis:: In a regular drive system, with an internal combustion engine, vehicle braking is connected with the unproductive dissipation of kinetic and potential energy accumulated in the mass of the vehicle into the environment. This energy can constitute up to 70% of the energy used to drive a vehicle under urban conditions. Its recovery and reuse is one of the basic advantages of hybrid and electric vehicles. Modern traffic management systems as well as navigation systems should take into account the possibility of the energy recovery in the process of regenerative braking. For this purpose, a model of a regenerative braking process may be helpful, which on the one hand will enable to provide information on how traffic conditions will affect the amount of energy dissipated (wasted) into the atmosphere, on the other hand will help to optimize the route of vehicles with regenerative braking systems. This work contains an analysis of the process of the regenerative braking for the urban traffic conditions registered in Gdańsk. A model was also presented that allows calculating the amount of energy available from the braking process depending on the proposed variables characterizing the vehicle traffic conditions.
Źródło:: Combustion Engines; 2019, 58, 3; 203-207
2300-9896
2658-1442
Pojawia się w:: Combustion Engines
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Zbawienny odruch frasobliwości : rozmowa z Szefem Obrony Cywilnej Kraju Mariuszem Furmankiem
Autorzy:: Furmanek, Mariusz.
Lentowicz, Zbigniew.
Powiązania:: Rzeczpospolita 1998, nr 271, s. 4
Data publikacji:: 1998
Tematy:: Obrona cywilna Polska
Obrona terytorialna
Opis:: Fot.
Dostawca treści:: Bibliografia CBW

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Skocz do pozycji: 10.

Tytuł:: Knee joint position sense in physically active patients after ACL reconstruction
Autorzy:: Pawlak, Dawid
Wysota, Aleksandra
Furmanek, Mariusz
Ficek, Krzysztof
Juras, Grzegorz
Powiązania:: https://bibliotekanauki.pl/articles/1054848.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: anterior cruciate ligament
joint position sense
knee
reconstruction
Opis:: The term “proprioception” is defined as the conduction of sensory information deriving from proprioceptors that have an impact on conscious sensations, posture and trans-segmental sense. An ACL injury may lead to functional knee joint instability. According to research, this may result in impaired movement sensation and joint position. The purpose of this study was to evaluate the joint position sense (JPS) in patients before arthroscopic ACL reconstruction and 5 months after the surgery. The examinations were conducted in a group of twelve specifically selected male patients. The examination procedure consisted of JPS measurement in both lower limbs (the operated and the healthy one) during active extension in a range of angles: 30, 45, 60°. The level of significance was: p < 0.05. The analysis of variance performed for repeated measurements (ANOVA) did not indicate any statistically significant differences of JPS in comparisons made between the operated and the healthy limb. Statistical values for the absolute, relative, and variable errors were p = 0.7684, p = 0.1546, p = 0.5694 respectively. The obtained results do not indicate any limitation of proprioception in patients with ACL injury before the intervention or half a year later.
Źródło:: Central European Journal of Sport Sciences and Medicine; 2014, 7, 3; 65-72
2300-9705
2353-2807
Pojawia się w:: Central European Journal of Sport Sciences and Medicine
Dostawca treści:: Biblioteka Nauki