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Tytuł:
Characteristics of wind conditions in the Odra estuary
Autorzy:
Pluta, M.
Powiązania:
https://bibliotekanauki.pl/articles/1920510.pdf
Data publikacji:
2000
Wydawca:
Instytut Morski w Gdańsku
Tematy:
wind conditions
Odra estuary
Opis:
In this paper a statistical analysis of wind conditions occurring in the Odra estuary has been presented. The measurements of wind directions and velocities from years 1970-1995 for four meteorological stations of IMGW: Świnoujście, Dziwnów, Trzebież and Szczecin-Dąbie have been analysed.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2000, 27, 2; 23-35
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method for wind turbine selection basing on in-field measurements
Autorzy:
Wolniewicz, Katarzyna
Kuczyński, Waldemar
Zagubień, Adam
Powiązania:
https://bibliotekanauki.pl/articles/95235.pdf
Data publikacji:
2019
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
wind turbines
wind power
wind conditions
turbiny wiatrowe
energia wiatru
warunki wiatrowe
Opis:
The following paper covers a method for wind turbine selection with a horizontal axis of rotation basing on real in-field measurements of wind conditions. The basic meteorological properties and characteristics obtained during measurement campaigns using necessary equipment as well as the used methodology are vital for successful investment in wind farm. The main goal of in-field investigation is to collect meteorological data using a measurement mast installed at the possible future wind farm location. The conducted measurement campaign provided wind directions, velocities and wind blast parameters. The measurements were conducted in the northern Poland using measuring system installed on 100 meter high mast. The system was equipped with all devices necessary to measure and record the basic wind parameters. The reliability of measurements was verified using statistical data for the Weitbull distribution and the wind rose. In this way, the energy potential of raw air stream that could possibly drive a wind turbine was determined. Among 6 pre-selected wind turbine types, the optimal one for a given location was proposed.
Źródło:
Journal of Mechanical and Energy Engineering; 2019, 3, 1; 77-84
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A methodology of wind turbines selection for the given wind conditions
Autorzy:
Jakubowski, M.
Mech, Ł.
Wolniewicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/95331.pdf
Data publikacji:
2017
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
wind power
wind conditions
wind turbine
energia wiatru
warunki wiatrowe
turbina wiatrowa
Opis:
The following paper presents a methodology of wind turbines selection with a axis of rotation based on measurements of wind conditions specific for the wind power sector. Basic properties and characteristics used in the wind power sector, as well as a proper measurement campaign along with determining the necessary instrumentation and the methodology of its use, are the basic parameters that determine the decision of wind farm investment. The main goal of those activities is to gather the accurate meteorological data in sufficient amount using a measurement tower situated at a possible future location of a wind farm. This method is used to identify the direction, speed, gust and energy of the wind. Measurements were made in northern Poland using a measurement system based on a 80-meter-high telescopic mast. The system was equipped with instrumentation necessary to measure and record the basic wind parameters, and was made by the Windhunter Serwis Ltd. Company headquartered in Koszalin. The reliability of measurements was verified using the statistical methods based on the Weitbull’s distribution and the windrose. Thus, the energy potential of the raw air stream was determined with a possible future use in a wind farm sitting.
Źródło:
Journal of Mechanical and Energy Engineering; 2017, 1, 2; 171-178
2544-0780
2544-1671
Pojawia się w:
Journal of Mechanical and Energy Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of hydro-meteorological conditions in the area of the Port of Świnoujście between 2011–2015
Autorzy:
Łazuga, K.
Gucma, L.
Gucma, M.
Powiązania:
https://bibliotekanauki.pl/articles/135228.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Port of Świnoujście
hydrometeorological conditions
safety of navigation
water levels change
visibility
wind conditions
Opis:
Świnoujście is a Polish seaport located on the Pomeranian Bay, on the southern coast of the Baltic Sea island of Usedom and Wolin. The port is situated in the Świna Strait in Świnoujście, Western Pomerania. The harbor consists of a cargo handling quay, passenger terminal and marina. The seaports of Świnoujście and Szczecin are closely linked economically to form a team and are connected by a passage through the Szczecin Lagoon. All big ships directed to Szczecin have to be routed through the port of Świnoujcie. The hydro-meteorological conditions in the Świnoujście Port area and surroundings, affecting safe maneuvering of ships, are analyzed by statistical methods. The conditions studied, with the aid of Port Captain logbook, are: currents, winds, water level, ice conditions and visibility. The statistical distribution of water level was analyzed and proposed as decision-making tool during a ship’s approach to Świnoujście Port.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 203-208
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Embedded real-time system for climate control in a complex greenhouse
Autorzy:
Candido, A.
Cicirelli, F.
Furfaro, A.
Nigro, L.
Powiązania:
https://bibliotekanauki.pl/articles/25752.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
control system
Java
humidity
external temperature
internal temperature
real-time system
climate control
greenhouse
integrated development
rainfall
wind conditions
embedded real-time system
Źródło:
International Agrophysics; 2007, 21, 1
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Transverse Acoustic Flow on the Input Impedance of Rapidly Flaring Horns
Autorzy:
Nederveen, C. J.
Powiązania:
https://bibliotekanauki.pl/articles/177015.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
input impedance
horn
wind musical instruments
boundary conditions
Opis:
In slowly flaring horns the wave fronts can be considered approximately plane and the input impedance can be calculated with the transmission line method (short cones in series). In a rapidly flaring horn the kinetic energy of transverse flow adds to the local inertance, resulting in an effective increase in length when it is located in a pressure node. For low frequencies corrections are available. These fail at higher frequencies when cross-dimensions become comparable to the wavelength, causing resonances in the cross-direction. To investigate this, the pipe radiating in outer space is modelled with a finite difference method. The outer boundaries must be fully absorbing as the walls of an anechoic chamber. To achieve this, Berenger’s perfectly matched layer technique is applied. Results are presented for conical horns, they are compared with earlier published investigations on flanges. The input impedance changes when the largest cross-dimension (outer diameter of flange or diameter of the horn end) becomes comparable to half a wavelength. This effect shifts the position of higher modes in the pipe, influencing the conditions for mode locking, important for ease of playing, dynamic range and sound quality.
Źródło:
Archives of Acoustics; 2011, 36, 3; 533-544
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hydraulic conditions of steady motion in an estuarial river section under wind influence
Autorzy:
Meyer, Z.
Coufal, R.
Powiązania:
https://bibliotekanauki.pl/articles/241091.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
hydraulic conditions
steady motion
river estuaries
wind influence
swelling
Opis:
The effect of wind influence upon swellings in river estuaries has been presented in this elaboration. The wind, which causes shear stresses at the water surface, changes the vertical profile of water flow velocity and therefore is a factor causing wind swell-ings. This problem is very important in the estuarial river sections, especialIy in river inflows to reservoirs (sea), when natural slopes of flowing water are smalI and com-ponents of gravity farce are not able to oppose the wind effect. Then wind backwater occurs.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2001, 48, 3; 59-83
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Określenie granicznych prędkości wiatru dla bezpiecznego postoju kontenerowca ULCV na kotwicy
Determination of wind speed limits for safe anchoring of ULCV container ship
Autorzy:
Gil, M.
Wilczyński, P.
Powiązania:
https://bibliotekanauki.pl/articles/254145.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
prędkość wiatru
bezpieczeństwo
kontenerowiec
warunki hydrometeorologiczne
wind speed
security
container
hydrometeorological conditions
Opis:
W artykule omówiono wpływ warunków hydrometeorologicznych ze szczególnym uwzględnieniem działania wiatru oraz prądu na kontenerowiec ULCV (Ultra Large Container Vessel) podczas postoju na kotwicy. W celu wyznaczenia granicznych wartości wiatru, przeprowadzono badania symulacyjne z wykorzystaniem reprezentatywnego modelu statku, a otrzymane wyniki badań porównano z wykonanymi obliczeniami teoretycznymi.
Paper presents influence of hydro-meteorological conditions, especially wind and current on the ULCV (Ultra Large Container Vessel) container ship during anchoring. Wind speed limits, were determined by simulation study, based on representative ship model. Results of simulations were compared with theoretical calculations.
Źródło:
TTS Technika Transportu Szynowego; 2016, 12; 297-300
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Angle of Attack and Flow Conditions on Turbulent Boundary Layer Noise of Small Wind Turbines
Autorzy:
Afanasieva, N.
Powiązania:
https://bibliotekanauki.pl/articles/177922.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wind turbine
airfoil self-noise
turbulent boundary layer
flow conditions
angle of attack
Opis:
The article aims to solve the problem of noise optimization of small wind turbines. The detailed analysis concentrates on accurate specification and prediction of the turbulent boundary layer noise spectrum of the blade airfoil. The angles of attack prediction for a horizontal axis wind turbine (HAWT) and the estimation based on literature data for a vertical axis one (VAWT), were conducted, and the influence on the noise spectrum was considered. The 1/3-octave sound pressure levels are obtained by semi-empirical model BPM. Resulting contour plots show a fundamental difference in the spectrum of HAWT and VAWT reflecting the two aerodynamic modes of flow that predefine the airfoil self-noise. Comparing the blade elements with a local radius of 0.875 m in the HAWT and VAWT conditions the predicted sound pressure levels are the 78.5 dB and 89.8 dB respectively. In case of the HAWT with predicted local angle of attack ranging from 2.98º to 4.63º, the acoustic spectrum will vary primarily within broadband frequency band 1.74–20 kHz. For the VAWT with the local angle of attack ranging from 4º to 20º the acoustic spectrum varies within low and broadband frequency bands 2 Hz – 20 kHz.
Źródło:
Archives of Acoustics; 2017, 42, 1; 83-91
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Warunki meteorologiczne na Szrenicy w latach 2018–2020
Meteorological conditions on Szrenica mountain in 2018–2020
Autorzy:
Mendel, Karolina
Szyga-Pluta, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/43348679.pdf
Data publikacji:
2022
Wydawca:
Poznańskie Towarzystwo Przyjaciół Nauk
Tematy:
meteorological conditions
air temperature
precipitation
air pressure
wind
snow cover
insolation
Szrenica
Sudetes
Opis:
The article presents the weather conditions on Mount Szrenica, located in the Karkonosze range in the Sudetes, in 2018–2020. The data come from the Database of Integrated Monitoring of Natural Environment. An average temperature in the presented time was 4,0oC, an average yearly precipitation was 1245.8 mm, an average atmospheric pressure 865.3 hPa, average wind speed 5.1 m/s, average snow cover height 66.3 cm, the sun shone for 1881 hours in a year. Changes in individual values compared to the results published earlier prove the impact of global changes also in this area.
Źródło:
Badania Fizjograficzne Seria A - Geografia Fizyczna; 2022, 13 (73); 135-153
2081-6014
Pojawia się w:
Badania Fizjograficzne Seria A - Geografia Fizyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
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