Predicting moisture content in a pine logwood pile for energy purposes

Erber, Gernot; Kanzian, Christian; Stampfer, Karl

doi:10.14214/sf.910

Cited by 42 publications

(23 citation statements)

References 10 publications

(20 reference statements)

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“…The ANOVA analysis showed significant differences in moisture content among the species (p < 0.0001; F = 8024.35). In fact, black locust is the specie with the lowest moisture content after harvesting, thus requiring less energy consumption or shorter natural-air drying period before combustion [32]. The differences obtained in the moisture content after harvesting between poplar and black locust were similar to that found by Manzone [33], while the value determined for willow is similar to that found by Eisenbies et al [34].…”

Section: Moisture Contentsupporting

confidence: 84%

Combustion-Related Properties of Poplar, Willow and Black Locust to be used as Fuels in Power Plants

2017

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Abstract:The physical and thermochemical properties of three short rotation forestry crops (poplar, willow and black locust) have been determined and compared in order to evaluate their suitability (energy potential and combustion-related operation problems) to be used in energy devices. The planting density was 6666 in a rotation of four years and the analysis were performed at the end of the first rotation. The three species showed significant differences regarding production, moisture and ash content, heating value and bulk density. The results obtained allow to establish priorities between species according to the expectable combustion behavior, willow being the most appropriate. Results indicate no problems related to SO x and NO x emissions. Moreover, the alkali metals determined in the fuel together with the chlorine content suggest no operation problems related with fouling or harmful corrosion.

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Section: Moisture Contentsupporting

confidence: 84%

Combustion-Related Properties of Poplar, Willow and Black Locust to be used as Fuels in Power Plants

2017

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“…According to Hakkila (2004), moisture has a negative impact in regard to transport efficiency and its costs, heat value of fuel, combustion efficiency, combustion emissions, dry matter losses during storage as well as handling functionality especially during the frost period in winter. The methods of enhancing fuel quality have to be taken into account when defining the supply chain and storage of harvested biomass (Röser et al 2011) such as utilizing best natural drying seasons during spring and summer (Nurmi 1999, Nurmi & Hillebrand 2007, Pettersson & Nordfjell 2007, Erber et al 2012, having a drying period for loose logging residues on site (Jirjis 1995, Nurmi 1999, selecting feasible locations for roadside storage (Nurmi 1999, Nordfjell & Liss 2000, Nurmi & Hillebrand 2007, Fillback et al 2011) and for covering forest biomass piles at roadsides (Jirjis 1995, Nurmi & Hillebrand 2007, Röser et al 2011. With the use of these methods, the drying potential can be 20-30 percent points from the initial moisture content after harvesting.…”

Section: Fuel Quality Aspectsmentioning

confidence: 99%

Developing forest chips supply chains by redesigning supply operations and logistics

Väätäinen¹

2018

Diss. For.

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3Väätäinen K. (2018). Developing forest chips supply chains by redesigning supply operations and logistics. Dissertationes Forestales 250. 75p. https://doi.org/10.14214/df.250 ABSTRACTThe overall aim of the thesis was to design efficient supply chain setups in the selected supply environments by enhancing overall supply system performance, decreasing supply costs and improving year-round working opportunities by taking fuel properties through the supply chain into account. The supply chain re-engineering approach has been used with a narrowed focus, where logistics and inventory, material handling and delivery of forest chips to heat and power plant as well as the customer's desideratum have been considered. The studied supply chains were all based on the transportation of forest biomass as chipped from roadside storage locations either directly to power plant or via terminal or inland waterway harbour to power plant by chip truck or a combination of barge and chip truck.Discrete event simulation was selected as a study method due to the characteristics of the forest chip supply chains including the high level of interactions between system elements and the specific characteristics of the supply environment. The data required for the model development and models' parameter input values were acquired from the available data of the real system and from the literature.To enhance the performance of the forest chip supply chain from roadside storage locations to end-use facilities, the following results and conclusions were obtained: 1) Rearrangements in the set-up of fuel reception stations and the logistics of fuel truck reception at the power plant as well as adaptive shift scheduling of trucks resulted in a notable decrease in the waiting times of fuel trucks at the power plant's fuel reception. 2) Forest chip supply from roadside storage locations highly encourages the use of storage area location and quality information for smart material allocation to achieve a higher energy output with lower supply costs, especially when the demand for fuel is at its highest.3) By introducing a feed-in terminal for forest chip supply, cost compensation for additional terminal-driven costs can be gained through a higher annual capacity utilisation of a fuel supply fleet and more secured fuel supply to power plants by decreasing the need for supplemental fuel, which can be more expensive at times when fuel demand is at its highest. Terminal-aided forest chip supply facilitates smoother working throughout the year in the chipping and transporting of forest chips, thus offering more stable working opportunities than a conventional direct supply of forest chips. 4) Inland waterway areas with existing waterway infrastructure and close connections to biomass resources and enduse facilities can offer a cost-competitive and supplemental method for the long distance transport of forest chips. Reshaping the conventional fleet used for waterway transport and restructuring the logistics of waterway transportation together with harbour ope...

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“…If the material was stored longer, the moisture content would decrease and the transport capacity could increase. With natural drying, the moisture content can be lowered to 32% (Erber et al 2012). Nurmi and Hillebrand (2007) showed that it was possible to reduce the moisture content to 30%.…”

Section: Discussionmentioning

confidence: 99%

Monitoring the chipping and transportation of wood fuels with a fleet management system

Holzleitner¹,

Kanzian²,

Höller³

2013

Silva Fenn.

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Controlling and organizing the complex forest-to-consumer supply chain of wood fuels is a challenging task, especially for the chipping and transport processes. Truck mounted chippers and transport trailer-trucks must be scheduled to minimize delay to be profitable. Job management within the supply chain, including machine activity based controlling, offers a new way to increase efficiency and productivity. However, detailed data are required to detect and analyze potential gaps and improve forest fuel supply. Generally, data regarding the wood fuel supply chain process are obtained from extensive time studies that are based on a specific process step. Although time studies can detect details during the production of forest fuels, they only describe certain time frames. Long-term data that are recorded during the entire year could encompass seasonal and short term effects. This study aims to monitor the forest fuel supply processes (semi-automated), specifically regarding time and fuel consumption. Large data sets were automatically and efficiently gathered with little effort by drivers and operators. Data were recorded with fleet management equipment for more than 14 months. Vehicle data, including GPS data, were logged at an interval of one minute. Data management was conducted in a pre-configured database that contained pre-defined reports and were run by the Institute of Forest Engineering, Vienna. Work step assignments were implemented with Structured Query Language (SQL)-routines by using the raw machine activities data and GPS. The chipping and transport activities of more than 240 loads were analyzed by focusing on fuel consumption, time needed and traffic. The average distance between chipping sites and plants was approximately 54 kilometers. Fuel consumption from transport reached 50 l/100 km. The chipping unit reached a productivity of 12.8 odt/PSH15 and had a fuel consumption of 58 liters per operating hour.

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Predicting moisture content in a pine logwood pile for energy purposes

Cited by 42 publications

References 10 publications

Combustion-Related Properties of Poplar, Willow and Black Locust to be used as Fuels in Power Plants

Combustion-Related Properties of Poplar, Willow and Black Locust to be used as Fuels in Power Plants

Developing forest chips supply chains by redesigning supply operations and logistics

Monitoring the chipping and transportation of wood fuels with a fleet management system

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