Temat: PVT - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Cascode ampliﬁers with low-gain variability and gain enhancement using a body-biasing technique
Autorzy:: Pereira, N
Oliveira, L. B.
Goes, J.
Oliveira, J. P.
Powiązania:: https://bibliotekanauki.pl/articles/398063.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Łódzka. Wydział Mikroelektroniki i Informatyki
Tematy:: ampliﬁer
body-biasing
cascode
CMOS analog circuits
PVT compensation
wzmacniacz
kaskoda
układy analogowe CMOS
kompensacja PVT
Opis:: This paper presents a simple circuit technique to reduce gain variability with PVT variations in cascode ampliﬁers using a body-biasing scheme, while enhancing the overall gain of the ampliﬁer. Simulation results of a standard telescopic-cascode ampliﬁer, in two different nanoscale CMOS technologies (130 nm and 65 nm) show that the proposed compensated circuit ampliﬁer exhibits a (DC) gain variability smaller (below ± 0.5 dB) than the original (uncompensated) circuit, while reaching a gain enhancement of about 3 dB. The required auxiliary biasing circuit dissipates around 5% of the main ampliﬁer circuit.
Źródło:: International Journal of Microelectronics and Computer Science; 2013, 4, 3; 98-102
2080-8755
2353-9607
Pojawia się w:: International Journal of Microelectronics and Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Management of hybrid renewable energy source in smart building with use SCADA system
Autorzy:: Szymenderski, J.
Typańska, D.
Powiązania:: https://bibliotekanauki.pl/articles/97195.pdf
Data publikacji:: 2015
Wydawca:: Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:: Hybrid Renewable Energy Source
Smart Building
SCADA
KNX
PVT
Opis:: The paper presents issues concerning the problems of energy management in buildings equipped with building automation systems and renewable energy from different sources. The first part discusses the issues of energy demand in buildings and the problems associated with its volatility during the circadian cycle and also provides an example of a source hybrid PV/T panel, describes its construction and use. Next part is the presentation of building automation systems and management systems. On this basis, it proposed to use the SCADA system and its connection with the installation of building automation as the supervisory software production and energy consumption in a detached house. In conclusion, it demonstrated the advantages of the presented solution, rated the possibility of implementation and benefits to users.
Źródło:: Computer Applications in Electrical Engineering; 2015, 13; 433-442
1508-4248
Pojawia się w:: Computer Applications in Electrical Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Application of Raman spectroscopy analysis in unconventional natural gas reservoirs – density and pressure dependence on Raman signal intensity
Autorzy:: Kuczyński, S.
Włodek, T.
Smulski, R.
Dąbrowski, K.
Krakowiak, M.
Barbacki, J.
Pawłowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/298970.pdf
Data publikacji:: 2017
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: Raman spectroscopy
unconventional natural gas
fiber optic
PVT
hydrocarbons
Opis:: This paper contains information about Raman spectroscopy, describing its possible application in the oil and gas industry. This method allows the performance of a series of repetitive measurements to determine the composition of samples and its changes with high accuracy. In the article, the data presented in the literature connected with Raman spectroscopy and the oil and gas industry is analyzed. This paper considered measurements of a natural gas composition in simulated in-situ conditions performed using Raman spectroscopy. The current research project is trying to develop a mobile apparatus which would use Raman spectroscopy for defining reservoir fluid compounds in high pressure and high temperature conditions. The preliminary measurements were carried out in the simulated in-situ in variant pressure conditions.
Źródło:: AGH Drilling, Oil, Gas; 2017, 34, 3; 761-774
2299-4157
2300-7052
Pojawia się w:: AGH Drilling, Oil, Gas
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: A new empirical correlation for estimating bubble point pressure using the genetic algorithm
Autorzy:: Heidarian, M.
Karimnezhad, M.
Schaffie, M.
Ranjbar, M.
Powiązania:: https://bibliotekanauki.pl/articles/184188.pdf
Data publikacji:: 2017
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: bubble point pressure
empirical correlations
Middle East
genetic algorithm
PVT properties
Opis:: In this paper, a new and more accurate correlation to predict bubble point pressure (Pb) for Middle East crudes by using the genetic algorithm (GA) is attempted. For this purpose, a total of 286 data sets of different crude oils from Middle East reservoirs were used as training data for constructing the correlation. The general form of the correlation was found by several regressive examinations. To improve the correlation, the genetic algorithm was applied. To validate the correlation, 143 data sets of different crudes from Middle East reservoirs which were different from the training data were used as test data for calculating mean absolute relative error (MARE) and correlation coefficient (R2) between the predicted values from the proposed correlation and the experimental values. In addition, the MARE and R2 were calculated for previous correlation in the test data. The results show that the proposed correlation is more accurate than all of the previous correlations exclusively for Middle East crudes.
Źródło:: Geology, Geophysics and Environment; 2017, 43, 1; 33-41
2299-8004
2353-0790
Pojawia się w:: Geology, Geophysics and Environment
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: A comparative study on the performance of radiation detectors from the HgI2 crystals grown by different techniques
Autorzy:: Martins, J. F. T.
Costa, F. E.
dos Santos, R. A.
de Mesquita, C. H.
Hamada, M. M.
Powiązania:: https://bibliotekanauki.pl/articles/146916.pdf
Data publikacji:: 2012
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: crystal growth
iodide mercury crystal
physical vapor transport (PVT)
radiation detector
semiconductor crystal
Opis:: In this work, the establishment of a technology for HgI2 purification and crystal growth is described, aiming at a future application of this crystal as a room temperature radiation semiconductor detector. Two methods of crystal growth were studied in the development of this work: (1) physical vapor transport (PVT) and (2) saturated solution from dimethylsulphoxide (DMSO) complexes. In order to evaluate the crystals obtained using each of these methods, systematic measurements were carried out for determining the stoichiometry, structure, orientation, surface morphology and impurity of the crystal. The influence of these physicochemical properties of the crystals developed was evaluated in terms of their performance as a radiation detector. The best response to radiation was found for the crystals grown by the PVT technique. Significant improvement in the performance of HgI2 radiation detector was found, purifying the crystal by means of two successive growths by the PVT technique.
Źródło:: Nukleonika; 2012, 57, 4; 555-562
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Performance investigation of hybrid photovoltaic thermal-heat with mini-channels for application in electric vehicles
Autorzy:: Strąk, Dariusz
Powiązania:: https://bibliotekanauki.pl/articles/24200857.pdf
Data publikacji:: 2023
Wydawca:: Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:: mini-channels
numerical simulations
one-dimensional model
autonomous car system with PVT
vehicle battery heat exchanger
Opis:: The first autonomous car was developed in the 1980s, but it wasn't until the early 2010s that the technology began to gain significant attention and investment. In 2010, Google began testing self-driving cars on public roads, and since then, many other companies have joined the race to develop fully autonomous vehicles. Hybrid PVT (Photovoltaic Thermal) heat exchangers cooled with mini-channels find application in autonomous vehicles as a solution that enables efficient cooling of the vehicle's electronics and batteries. The solution involves using photovoltaic panels to generate electricity and removing the heat produced during the process using mini-channels is removed by mini-channels. Hybrid PVT heat exchangers cooled with mini-channels can help maintain appropriate temperatures inside autonomous vehicles that generate large amounts of heat from electronic systems and sensors. The setup can improve the performance and reliability of autonomous systems, increase energy efficiency, and reduce energy demands. The experimental setup includes two parallel mini-channel systems separated by a smooth copper plate. The study aims to determine local heat-transfer coefficients, with a cooled solar cell efficiency range of 10% to 14% compared to other research. The cooled PV temperature range achieved was from 19.6 to 22.4 degrees Celsius, which is favorable for photovoltaic panels' operation under approximate light intensity for Poland's latitude. Heat-transfer from hot surfaces to cold fluids is analyzed during single-phase convection using two calculation methods: one-dimensional and numerical simulations using Simcenter STAR CCM+. Cooling photovoltaic modules is critical for the photovoltaic and autonomous vehicle systems sector, making this research significant both theoretically and practically. The research and methods presented in the article on mini-channel cooling of photovoltaic systems and autonomous vehicle systems are innovative at a global scale, and are crucial for further development of sustainable energy systems and reduction of greenhouse gas emissions.
Źródło:: Archiwum Motoryzacji; 2023, 100, 2; 5--30
1234-754X
2084-476X
Pojawia się w:: Archiwum Motoryzacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Tests and theoretical analysis of a PVT hybrid collector operating under various insolation conditions
Autorzy:: Sawicka-Chudy, P.
Sibiński, M.
Cholewa, M.
Klein, M.
Znajdek, K.
Cenian, A.
Powiązania:: https://bibliotekanauki.pl/articles/105640.pdf
Data publikacji:: 2018
Wydawca:: Centrum Badań i Innowacji Pro-Akademia
Tematy:: conversion of solar energy
photovoltaics
Silicon solar cells
PVT collector
konwersja energii słonecznej
fotowoltaika
krzemowe ogniwa słoneczne
Opis:: The main goal of the study was to investigate the relationship between the orientation of the PVT (PhotoVoltaic Thermal) collector and the thermal and electric power generated. Extensive research was performed to find optimal tilt angles for hybrid solar thermal collectors, which combine photovoltaic as well as thermal collection in a single unit, known as PVT (PhotoVoltaic Thermal) modules for an office building with working hours between 7.00 and 16.00. The comprehensive study included field measurements of the modules in central Poland and tests under AM (air mass) 1.5 conditions in a certified laboratory KEZO (Centre for Energy Conversion and Renewable Resources) Polish Academy of Sciences in Jablonna. Furthermore, a PVT system was investigated using the simulation method based on the dedicated Polysun software. The PV characteristics and efficiency of the PV module and the relation between power or efficiency of the PVT module and incidence angle of solar-irradiance were studied. Optimal work conditions for commercial PVT modules were ascertained. In addition, it was found that the maximum efficiencies of PV module (ηPV), solar thermal-collector (ηc) and PVT hybrid collector (ηPVT) registered under field conditions were higher than the ones measured under laboratory conditions.
Źródło:: Acta Innovations; 2018, 26; 62-74
2300-5599
Pojawia się w:: Acta Innovations
Dostawca treści:: Biblioteka Nauki