Temat: biomass modelling - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Estimating forest biomass by remote sensing RADAR data in Brazil
Autorzy:: Santos, J.R.
Gama, F.F.
da Conceicao Bispo, P.
Powiązania:: https://bibliotekanauki.pl/articles/52438.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: forest biomass
biomass modelling
forest inventory
tropical forest
remote sensing
eucalyptus tree
stand
RADAR data
Brazil
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Simulations of fuels consumption in the CHP system based on modernised GTD-350 turbine engine
Autorzy:: Hryniewicz, Marek
Roman, Kamil
Powiązania:: https://bibliotekanauki.pl/articles/2048532.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: biomass
cogeneration
electricity production from biomass
heat production from biomass
mathematical modelling
turbine engine
Opis:: There were done simulations of fuels consumption in the system of electrical energy and heat production based on modernised GTD-350 turbine engine with the use of OGLST programme. In intention the system based on GTD-350 engine could be multifuel system which utilise post-fying vegetable oil, micronised biomass, sludge, RDF and fossil fuels as backup fuels. These fuels have broad spectrum of LHV fuel value from 6 (10 6 J•kg -1 ) (e.g. for sludge) to 46 (10 6 J•kg-1) (for a fuel equivalent with similar LHV as propan) and were simulations scope. Simulation results showed non linear dependence in the form of power function between unitary fuel mass consumption of simulated engine GTD-350 needed to production of 1 kWh electrical energy and LHV fuel value (10 6 J•kg -1). In this dependence a constant 14.648 found in simulations was multiplied by LHV raised to power - 0.875. The R2 determination coefficient between data and determined function was 0.9985. Unitary fuel mass consumption varied from 2.911 (kg•10 -3•W -1•h -1) for 6 (10 6 J•kg -1) LHV to 0.502 (kg•10 -3 •W -1 •h -1) for 46 (10 6 J•kg -1) LHV. There was assumed 7,000 (h) work time per year and calculated fuels consumption for this time. Results varied from 4,311.19 (10 3 kg) for a fuel with 6 (10 6 J•kg -1) LHV to 743.46 (10 3 kg) for a fuel with 46 (10 6 J•kg -1) LHV. The system could use fuels mix and could be placed in containers and moved between biomass wastes storages placed in many different places located on rural areas or local communities.
Źródło:: Journal of Water and Land Development; 2021, 51; 250-255
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Mathematical modelling of wooden biomass torrefaction
Autorzy:: Stepien, P.
Bialowiec, A.
Powiązania:: https://bibliotekanauki.pl/articles/52606.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: torrefaction
biomass
mathematical modelling
technological parameter
biocarbon
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2017, 60, 200
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Modelling spring barley development using canonical functional model. Preliminary results
Modelowanie rozwoju jęczmienia jarego z wykorzystaniem funkcjonalnego modelu kanonicznego. Wyniki wstepne
Autorzy:: Jankowski, P.
Gozdowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/9855.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Katedra Zastosowań Matematyki i Informatyki
Tematy:: modelling
spring barley
barley
plant development
biomass
functional model
Źródło:: Colloquium Biometricum; 2008, 38
1896-7701
Pojawia się w:: Colloquium Biometricum
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Estimates and forecasts of forest biomass and carbon sequestration in North America and Australia: a forty-five year quest
Autorzy:: Botkin, D.B.
Ngugi, M.R.
Doley, D.
Powiązania:: https://bibliotekanauki.pl/articles/52742.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: estimation
forecast
forest biomass
forest modelling
forest inventory
biomass inventory
model validation
carbon sequestration
North America
Australia
Opis:: A half-century of forest inventory research involving statistically-valid fieldmeasurements (using statistically representative sample size and showing confidence limits) and well-validated forecasting methods are reviewed in this paper. Some current procedures overestimate global and large-scale forest biomass, carbonstorage, and carbon sequestering rates because they are based on statistically-invalid methods (errors in estimates are unavailable and unreported), or they fail to consider key dynamic characteristics of forests. It is sometimes assumed that old-growth forests can serve as fixed, steady-state storage of biomass and carbon for indefinitely long periods, but it is shown by both modelling and remote sensing that forests are dynamic systems, the state of which can change considerably over as shorta time as a decade. Forecasting methods show that maximum biomass and carbon storage in some important forest types occurs in mid-succession, not in old-growth. It is proposed, therefore, that realistic biomass and carbon storage estimates used for carbon credits and offsets be determined as the statistical mean minus the confidence interval and that practical carbon sequestering programs include specific timeframes, not indefinitely long periods of time.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2014, 57, 192
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Modelling of pollutants concentrations from the biomass combustion process
Autorzy:: Magdziarz, A.
Wilk, M.
Zajemska, M.
Powiązania:: https://bibliotekanauki.pl/articles/185822.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: modelowanie numeryczne
zanieczyszczenie powietrza
biomass combustion process
air pollutant
numerical modelling
Opis:: This paper presents possibilities for of numerical modelling of biomass combustion in a commercially available boiler. A sample of biomass was tested with respect to its physical and chemical properties. Thermogravimetry studies of biomass were carried out. Computer simulation makes it possible to analyse complex phenomena which are otherwise difficult to observe. The aim of this work was to model biomass combustion to predict the amount of pollutants generated (NOx, CO, SO2) in the exhaust gases coming out from boilers The calculations were made using the CHEMKIN program. Results of calculations were performed taking into account the influence of temperature, pressure and residence time.
Źródło:: Chemical and Process Engineering; 2011, 32, 4; 423-433
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Numerical modelling of a stoker furnace operated under indirect co-firing of biomass
Autorzy:: Litka, R.
Kalisz, S.
Powiązania:: https://bibliotekanauki.pl/articles/185683.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: CFD modelling
stoker
co-firing
gasification
biomass
modelowanie CFD
współspalanie
gazyfikacja
biomasa
Opis:: The subject of the CFD analysis presented in this paper is the process of biomass indirect co-firing carried out in a system composed of a stoker-fired furnace coupled with a gasification reactor. The installation is characterised by its compact structure, which makes it possible to minimise heat losses to the environment and enhance the physical enthalpy of the oxidising agent – flue gases – having a favourable chemical composition with oxygen and water vapour. The test results provided tools for modelling of biomass thermal processing using a non-standard oxidiser in the form of flue gases. The obtained models were used to optimise the indirect co-combustion process to reduce emissions. An overall effect of co-combustion of gas from biomass gasification in the stoker furnace is the substantial reduction in NO emissions by about 22%.
Źródło:: Chemical and Process Engineering; 2016, 37, 2; 235-249
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Mathematical models use to yield prognosis of perennials on marginal land according to fertilisers doses
Autorzy:: Hryniewicz, Marek
Strzelczyk, Maria
Helis, Marek
Paszkiewicz-Jasińska, Anna
Steinhoff-Wrzesniewska, Aleksandra
Roman, Kamil
Powiązania:: https://bibliotekanauki.pl/articles/2048530.pdf
Data publikacji:: 2021
Wydawca:: Instytut Technologiczno-Przyrodniczy
Tematy:: biomass
cup plant
fertiliser
Jerusalem artichoke
mathematical modelling
nitrogen
willowleaf sunflower
yield
Opis:: Models describe our beliefs about how the world functions. In mathematical modelling, we translate those beliefs into the language of mathematics. Mathematical models can yield prognose on the base of applied fertiliser dose. In this work results of finding yield mathematical model according to fertiliser (nitrogen) dose for perennials (willowleaf sunflower Helianthus salicifolious, cup plant Silphium perfoliatum and Jerusalem artichoke Helianthus tuberosus) on marginal land are presented. Models were described as normalised square equations for dependence between yield and fertiliser doses. Experiments were conducted in lisymeters and vases for willowleaf sunflower and cup plant. For Jerusalem artichoke experiments were done in vases only. All experiments have been doing during two years (2018 and 2019) for different fertilisers doses (45, 90 and 135 kg N∙ha-1) in three repetitions. From simulations maximal yield could be achieved for following fertiliser doses – willowleaf sunflower 104 kg N∙ha-1, cup plant 85 kg N∙ha-1 and Jerusalem artichoke 126 kg N∙ha-1.
Źródło:: Journal of Water and Land Development; 2021, 51; 233-242
1429-7426
2083-4535
Pojawia się w:: Journal of Water and Land Development
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Modelling of acoustic backscattering by southern Baltic herring
Autorzy:: Idczak, J.
Gorska, N.
Powiązania:: https://bibliotekanauki.pl/articles/331977.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Akustyczne
Tematy:: acoustic biomass estimation
Baltic herring
target strength
modelling approach
X-ray images
Opis:: Assessment of Baltic herring abundance can be carried out using acoustic techniques. Analysis of the relationship between the Baltic herring individual target strength, TS, and the total fish length, L, important for the acoustic assessment, showed the relationship to be dependent on the location of the study area. This finding motivated a detailed analysis of the relationship for the herring occurring in the southern Baltic ICES subdivisions 24, 25, and 26, in which Poland is responsible for the acoustic herring abundance assessment. The paper addresses the numerical analysis of the backscattering properties of the southern Baltic herring. The modelling approach used to study the backscattering was based on the Modal Series-Based Deformed Cylinder Model approximation. Details of the individual herring swimbladders were taken into account. Morphometric data necessary for the analysis was obtained from X-ray images of herring from the Polish coastal zone (ICES subdivision 26).
Źródło:: Hydroacoustics; 2016, 19; 145-152
1642-1817
Pojawia się w:: Hydroacoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Impact of cutting units’ design on biomass cutting resistance
Autorzy:: Zastempowski, Marcin
Bochat, Andrzej
Janiec, Maciej
Hujo, Lubomir
Jablonicky, Juraj
Powiązania:: https://bibliotekanauki.pl/articles/2204589.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: biomass cutting
drum cutting unit
plant material
mathematical modelling
cutting of fibrous materials
Opis:: The paper presents mathematical models describing the moments of resistance to cutting on the cutting drum shafts in the biomass cutting process. The mathematical procedures described in the paper have been verified on a test stand developed and constructed by the authors, which reflects real conditions of the process of cutting plant material into pieces of specified lengths. Experimental verification proved that the developed mathematical models are adequate for drums of both cylindrical and conical constructions. The value of the average error did not exceed 13%. Following the mathematical elaboration and verification studies, the authors carried out calculations for machines currently available on the market that are equipped with drum cutting units. The calculations were carried out for the most commonly cut material, i.e. for maize, straw and green plant materials. The obtained results confirm the complexity of the problem arising from a wide range of numerical values of cutting resistance, which is contained in the range of 400–1,800 nm. The compiled database can be practically applied in the selection of machines for specific field works, and the mathematical models developed and verified in the study can be applied at the stage of designing new designs of cutting drums used in forage harvesters.
Źródło:: Acta Mechanica et Automatica; 2022, 16, 3; 159--265
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Model research of gas emissions from lignite and biomass co-combustion in a large scale CFB boiler
Autorzy:: Krzywański, J.
Rajczyk, R.
Nowak, W.
Powiązania:: https://bibliotekanauki.pl/articles/184895.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biomasa
złoże fluidalne
współspalanie
węgiel brunatny
modelowanie
biomass
circulating fluidised bed
co-combustion
lignite
modelling
Opis:: The paper is focused on the idea of a combustion modelling of a large-scale circulating fluidised bed boiler (CFB) during coal and biomass co-combustion. Numerical computation results for three solid biomass fuels co-combustion with lignite are presented in the paper. The results of the calculation showed that in previously established kinetics equations for coal combustion, some reactions had to be modified as the combustion conditions changed with the fuel blend composition. Obtained CO2, CO, SO2 and NOx emissions are located in borders of ± 20% in the relationship to the experimental data. Experimental data was obtained for forest biomass, sunflower husk, willow and lignite cocombustion tests carried out on the atmospheric 261 MWe COMPACT CFB boiler operated in PGE Turow Power Station in Poland. The energy fraction of biomass in fuel blend was: 7%wt, 10%wt and 15%wt. The measured emissions of CO, SO2 and NOx (i.e. NO + NO2) were also shown in the paper. For all types of biomass added to the fuel blends the emission of the gaseous pollutants was lower than that for coal combustion.
Źródło:: Chemical and Process Engineering; 2014, 35, 2; 217-231
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: The influence of the Hel upwelling (Baltic Sea) on nutrient concentrations and primary production - the results of an ecohydrodynamic model
Autorzy:: Kowalewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/49109.pdf
Data publikacji:: 2005
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: primary production
nutrient concentration
phytoplankton biomass
ecohydrodynamic modelling
upwelling
validation
ProDeMo model
Baltic Sea
Gdansk Gulf
Opis:: An ecohydrodynamic model was used to investigate the effect of the Hel upwelling on nutrient concentrations, primary production and phytoplankton biomass. The model covered the whole Baltic Sea with a 5 NM grid spacing and the Gulf of Gdańskwith a 1 NM grid spacing. Validation indicated good agreement between model results and measurements in the GdańskD eep, and slightly weaker concord for the Hel upwelling area. The vertical nutrient fluxes associated with up- and downwelling in the Hel region were simulated for two 30-day periods in 2000. The nutrient input resulting from long-term upwelling is comparable to the load carried into the Gulf of Gdańskb y the Vistula (Wisła), the largest river in the vicinity. Performed at times when upwelling was almost permanent, the simulations showed elevated nutrient concentrations in surface waters. This was especially distinct in spring when primary production and phytoplankton biomass were both higher. In late summer, however, upwelling caused primary production to decrease, despite the elevated nutrient levels.
Źródło:: Oceanologia; 2005, 47, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki