Temat: transport of heat - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An analysis of a temperature change in a cross‑section of borehole heat exchanger
Autorzy:: Zlotkowski, A.
Szczesiul, P.
Powiązania:: https://bibliotekanauki.pl/articles/299265.pdf
Data publikacji:: 2013
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: borehole heat exchangers
heat pump
transport of heat
Opis:: Underground heat exchangers (BHE) are used witch elements to transport energy between the ground and other objects on the surface of the land. For simplification described in mathematical apparatus, they works are explain how linear heat source. The temperature is the same in all bodies of this model. This reduction to let easy describe theoretical changes temperature in BHE through transporting energy to / from rock in analytic mathematic method. The bad effect of this method is present by the same value of temperature in horizontal cross‑section and along BHE. The analysis of change of temperature field in the sealing cement BHE is a possibility for numerical simulation or laboratory model. Computer simulation needed according energy transport law. It to say about quantity of energy conducting between horizontal cross‑section of BHE cells, on which is divided. The second method obtains value of temperature points of the sealing cement. This is to be realized by sensors set up in to the horizontal cross‑section of BHE of laboratory model. This is possible thanks constructed the model of cross‑section of BHE.
Źródło:: AGH Drilling, Oil, Gas; 2013, 30, 4; 459-468
2299-4157
2300-7052
Pojawia się w:: AGH Drilling, Oil, Gas
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Application of GIS multi-criteria analysis and cartographic data presentation methods for public transportation optimization: the case of the town of Mińsk Mazowiecki
Autorzy:: Kropielnicki, Paweł
Powiązania:: https://bibliotekanauki.pl/articles/1935015.pdf
Data publikacji:: 2021
Wydawca:: Oddział Kartograficzny Polskiego Towarzystwa Geograficznego
Tematy:: GIS
multi-criteria analysis
heat maps
public transport
optimization of transport accessibility
Opis:: The author attempts to apply a multi-criteria spatial analysis of issues related to urban public transport in terms of optimizing its usage and accessibility. Publicly available spatial and statistical data were used. Desktop GIS computer software was the primary tool and work environment - due to its popularity and wide interdisciplinary application in studying geospatial phenomena, processes, and dependencies. The article consists of two parts. The first identifies the research area, indicates the data used and the methodology of the conducted analysis, while the second presents the results of analyses in optimizing the functioning of public transport in Mińsk Mazowiecki (Mazowieckie Voivodeship, Poland) and recommendations that may contribute to disseminating the use of multi-criteria analyses in medium-sized cities.
Źródło:: Polish Cartographical Review; 2021, 53; 49-62
2450-6974
Pojawia się w:: Polish Cartographical Review
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Simulation of rime icing and its effects on aerodynamic characteristics of an airfoil
Autorzy:: Sznajder, J.
Powiązania:: https://bibliotekanauki.pl/articles/243475.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: computational fluid dynamics
aerodynamics
two-phase flow
simulation of ice accretion
heat exchange
aircraft engineering
transport
vehicle
Opis:: A mathematical model for simulation of icing dedicated to simulation of ice accretion and its effects on aircraft aerodynamic characteristics in conditions of rime icing is presented. Pure rime icing occurs at lower temperatures than glaze icing and results in higher roughness of the surface of deposited ice. The model accounts for increased surface roughness, in terms of equivalent sand grain roughness, caused by deposited rime ice, which influences generation and dispersion of heat in the boundary layer. Increase of surface roughness is determined by analytical models created upon experimental data obtained in icing wind tunnels. Increased generation of heat is a result of increased tangential stress on the surface and is quantified in the temperature recovery factor determined numerically by a CFD solver. Effects of surface roughness on the intensity of forced convection are quantified by application of Colburn analogy between heat and momentum transfer in the boundary layer, which allows assessment of heat transfer coefficient for known friction coefficient, determined by CFD. The computational method includes determination of the surface distribution of mass of captured water in icing conditions. The model of freezing of captured water accounts for generation of heat due to latent heat of captured water droplets, temperature recovery in boundary layer and kinetic energy of captured droplets. The sinks of heat include forced convection, heating of super cooled droplets, conduction of heat through the ice layer and sublimation. The mathematical model is implemented as user-defined function module in ANSYS Fluent solver. The results include effects of deposited ice, including increased surface roughness on aerodynamic characteristics of an airfoil.
Źródło:: Journal of KONES; 2018, 25, 3; 437-443
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: „Na pierwszej linii drogowcy, kolejarze, energetycy i wojsko”. Tak zwana zima stulecia 1979 roku na przykładzie Ziemi Lubuskiej
‘On the Front Line – Road and Railroad Workers, Power Engineers and the Army’. The So-Called 1979 ‘Winter of the Century’ on the Example of the Lubusz Land
Autorzy:: Skobelski, Robert
Powiązania:: https://bibliotekanauki.pl/articles/2019168.pdf
Data publikacji:: 2022-01-14
Wydawca:: Polska Akademia Nauk. Instytut Historii im. Tadeusza Manteuffla PAN w Warszawie
Tematy:: Winter of the Century
Lubusz Land
power industry
transport
heat engineering
industry
agriculture
zima stulecia
Ziemia Lubuska
energetyka
ciepłownictwo
przemysł
rolnictwo
Opis:: Artykuł dotyczy zimy stulecia 1979 r., której skutki przedstawiono na przykładzie Ziemi Lubuskiej w szerokim kontekście ogólnopolskim. Warunki w kraju i tytułowym regionie zostały przeanalizowane w różnych dziedzinach życia gospodarczego i społecznego: komunikacji i transporcie, systemie energetycznym i ciepłownictwie, handlu i zaopatrzeniu ludności, a także w odniesieniu do problemów przemysłu i rolnictwa. Zaakcentowano nieporadność ówczesnych władz, wynikającą ze słabości systemowych, czego efektem były licznie zaniedbania i chaos organizacyjny.
The article deals with the effects of the so-called ‘Winter of the Century’ of 1979 on the example of the Lubusz Land in a broad national context. The conditions in the country and the region were analysed in various domains of economic and social life: transport and communication, the energy and heating systems, trade and supply, and also in relation to industrial and agricultural problems. The then authorities’ incompetence was emphasised as a result of political system weaknesses, leading to numerous failures and organisational chaos.
Źródło:: Polska 1944/45-1989. Studia i Materiały; 2022, 19; 189-214
2450-8365
Pojawia się w:: Polska 1944/45-1989. Studia i Materiały
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "transport of heat" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język