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    Tytuł:
    Problemy składowania wybranych rodzajów biomasy w silosach z blachy falistej
    Autorzy:
    Hotała, E.
    Zambrowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/162116.pdf
    Data publikacji:
    2010
    Wydawca:
    Polski Związek Inżynierów i Techników Budownictwa
    Tematy:
    biomasa
    magazynowanie biomasy
    silos metalowy
    silos z blachy falistej
    analiza obciążeń
    biomass
    biomass storage
    metal storage silo
    corrugated sheet silo
    load analysis
    Źródło:
    Przegląd Budowlany; 2010, R. 81, nr 5, 5; 97-100
    0033-2038
    Pojawia się w:
    Przegląd Budowlany
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biomass partition and carbon storage of Cunninghamia lanceolata chronosequence plantations in Dabie Mountains in East China
    Autorzy:
    Xie, X.
    Cui, J.
    Shi, W.
    Liu, X.
    Tao, X.
    Wang, Q.
    Xu, X.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/41359.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    biomass
    carbon storage
    Cunninghamia lanceolata
    Chinese fir
    chronosequence
    plantation forest
    Dabie Mountains
    China
    Opis:
    The quantification of biomass carbon pools is important for understanding carbon cycling in forest ecosystems. This study was designed to reveal the effects of stand age on biomass partitioning and carbon storage of Chinese fir plantation stands in Dabie Mountains of Anhui, East China. A total of six even-aged Chinese fir plantation stands along an age-sequence from 10 to 50 years were selected. To quantify the biomass of different tree components, 18 trees with diameter at breast height (D1.3) from 6.5 to 35.2 cm were harvested from the different aged stands. Biomasses of understory vegetation, forest floor and standing dead trees were also investigated. Total biomass carbon storages ranged from 57.6 to 211.4 Mg ha–1 in the different aged stands. Tree layer comprised from 93.7% to 96.4% of the total biomass C pools in the different aged stands. The C pools of the necromass were from 1.8 to 6.2 Mg ha–1. Stand age had a significant effect on tree biomass partitioning, with an increase in proportion of root biomass. The root/shoot ratios were from 0.187 to 0.312, which was significantly positively correlated to stand age. The existing plantation stands are still developing and have somewhat high rate of biomass and carbon accumulations beyond the normal rotation period (usually 25–30 years) even over an age of 50 years. Appropriate prolongation of the rotation period of Chinese fir plantation will be effective in maintaining long-term productivity and providing large carbon sink. The measurements provide valuable data for modelling productivity of Chinese fir plantation forest.
    Źródło:
    Dendrobiology; 2016, 76
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Naturalne suszenie surowca drzewnego w miejscu pozyskania
    Natural drying of wood in the cutting area
    Autorzy:
    Tomczak, A.
    Jelonek, T.
    Leszczyński, N.
    Korzeniewicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/988961.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    uzytkowanie lasu
    surowce drzewne
    drewno swiezo sciete
    masa drewna
    wilgotnosc drewna
    suszenie naturalne
    magazynowanie
    biomass
    energy wood
    industrial wood
    storage
    moisture content
    Opis:
    Wood obtained from freshly cut trees has a high moisture content and therefore its mass per volume unit is higher than the mass of dry wood. The natural drying is a simple and effective method of weight (moisture content) reduction, making a better use of the vehicle's payload, and thus reducing costs, including environmental costs. The conclusion is based on simulations and analyzes attempting to evaluate different solutions. As evidenced, the drying process of logs depends on numerous factors, which entails attempts at development of an optimal logging method, especially concerning energy wood, allowing for maximum value growth in as little time as possible. The suggestions cover various forms of logging (of whole trees, long timber), arranging (in piles, bundles), storing (in stands, by the roadside near cutting areas), and protection. Combined methods such as storing under canvas for winter only or storing in cutting areas and later in piles at the exit road also work in practice, but require more funds because their cost is determined by the number of stages composing the whole process. In case of wood, development of an optimal and simultaneously universal method used to prepare the lumber for transport and its delivery with consideration of as little environmental impact as possible is complicated. The numerous variables, some of which cannot be controlled or affected, create a considerable scientific problem as well. The authors covered in the presented literature review often stress the role of specific weather conditions accompanying an experiment or its location, the storage method, or lumber dimensions in the drying process. Storage time is perceived as equally important, but it is a derivative more or less determined by the previous variables. Previous studies of drying at the cutting area have been focused mainly on energy wood and less on industrial wood. They analysed the results of long−term storage and did not stress the potential advantages of short−term drying. Furthermore, we do not have sufficient information on species, including forest trees, which have a lower share in the volume of the logged wood. Advanced research can help establish the minimum mass (moisture content) with considerable impact on supply chain effectiveness improvement or evaluated various storing and drying methods. We reviewed reports explaining the impact of various factors on natural drying of wood, models and storage effects, and analyzing potential economic and environmental benefits.
    Źródło:
    Sylwan; 2017, 161, 11; 898-908
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Handling and transportation properties of rapeseed biomass as affected by particle size
    Autorzy:
    Bojanowska, Milena
    Powiązania:
    https://bibliotekanauki.pl/articles/29521042.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    rapeseed meal
    rapeseed cake
    canola
    biomass
    agricultural commodities
    bulk storage
    flowability
    logistics vulnerability
    particle size
    angle of repose
    porosity
    bulk density
    agricultural bulk solids
    Opis:
    Rapeseed by-products of seeds de-oiling, particularly expellers and post-extracted meal, are currently considered an important biomass that can be used as an alternative energy source, either in raw form or after conversion to biochar. Rapeseed biomass represents a difficult-to-handle cargo, mainly due to its sensitivity to mechanical, climatic, and biological impacts, as well as its dusty nature. This study aims to determine the physical properties of rapeseed meals and their fractions. Morphological and chemical features of six particle sets are investigated in order to explain the variation in their physical properties having importance in handling and transportation processes. The true density of fractions increases when the particle size decreases due to the diminishing quantitative share of seed coats. No correlation is observed between true and bulk densities, as the particle shape, surface sculpture, and adhesion affect the mutual particle arrangements. Along with a decrease in the particle size from 0.4 mm, a rapid decrease in the flowability is observed. The tendency of the finest dust (d < 0.075 mm) to form agglomerated complexes causes its lower bulk density, higher porosity, and higher angles of repose in comparison to coarse dust (0.075–0.4 mm). It is concluded that a relatively low tendency to free flowing of natural RSM is mainly caused by its wide-ranging particle size distribution and their geometry differentiation, which facilitate mutual particle interlockings. The known cases of blockages of silos, bins, hoppers, and transfer chutes may be mainly caused by the powder fractions (< 0.2 mm), with a much lower flowability than other particles.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2023, 74 (146); 5-15
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badania stalowych silosów do składowania biomasy
    Tests on steel silos for the storage of biomass
    Autorzy:
    Hotała, E.
    Pawłowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/163564.pdf
    Data publikacji:
    2012
    Wydawca:
    Polski Związek Inżynierów i Techników Budownictwa
    Tematy:
    silos stalowy
    biomasa
    przechowywanie
    doświadczenie praktyczne
    katastrofa
    blacha falista
    parcie hydrostatyczne
    badanie eksperymentalne
    steel silo
    biomass
    storage
    experience
    failure
    corrugated sheet
    hydrostatic pressure
    experimental investigation
    Opis:
    Przedmiotem analizy są badania obciążeń płaszczy i lejów oraz płaskich den stalowych silosów, o płaszczach z blach falistych, przeznaczonych do składowania różnych rodzajów biomasy.
    This article analyses load testing of the shells, funnels and flat bottoms of steel silos, with shells made of corrugated metal plate, designed for the storage of various types of biomass.
    Źródło:
    Przegląd Budowlany; 2012, R. 83, nr 5, 5; 14-18
    0033-2038
    Pojawia się w:
    Przegląd Budowlany
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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