scholarly journals ANALYSIS OF POSSIBILITIES FOR THE PRODUCTION AND CONSUMPTION OF AGROBIOMASS BRIQUETTES IN UKRAINE. PART 1

2018 ◽  
Vol 40 (4) ◽  
pp. 62-68
Author(s):  
G.G. Geletukha ◽  
T.A. Zheliezna ◽  
S.V. Drahniev ◽  
A.I. Bashtovyi
Keyword(s):  
Driving Forces ◽  
Ecological Indicators ◽  
Small Scale ◽  
Current State ◽  
Solid Biofuels ◽  
Production And Consumption ◽  
Solid Biofuel ◽  
Husk Rice ◽  
Buckwheat Husk ◽  
Energy Equipment

The purpose of the work is to analyze existing preconditions, driving forces, and barriers for the widespread introduction of the production and use of fuel briquettes from biomass in Ukraine. The task of the work is to determine the advantages and prospects of the process, first of all, for domestic consumers, as well as to develop recommendations for creating a positive environment for the development of this segment of bioenergy in Ukraine. This part of the paper presents the current state of the market for solid biofuels in Ukraine. It is shown that in the biofuel market, the largest segment is solid biofuel in the form of firewood, wood chips, pellets and biomass briquettes, baled straw. Currently, a large amount of pellets and briquettes are exported from Ukraine to Europe due to the insufficient demand in the domestic market. The main features of the solid biofuels production in Ukraine are regional unevenness and relative non-uniformity of production as well as a large number of small-scale enterprises that work with traders. The advantages of the use of biomass briquettes as fuel were analyzed. The main advantages are the conformity of characteristics of briquettes with the requirements of boiler equipment for fuel, better ecological indicators in comparison with the burning of low-quality wood, no needs for specialized energy equipment in contrast with the use of pellets, availability of a significant amount of feedstock especially for briquettes from the biomass of agricultural origin. The current volume of the Ukrainian market for fuel briquettes from biomass for individual heating of the population can be estimated at the level of 500 th. t/year with its growth to over 3 million t/year until 2035. This part of the paper considers possible types of feedstock for the production of fuel briquettes and requirements for it. It is noted that the feedstock for the production of fuel briquettes can be soft and hard wood, straw, reed, sunflower husk, rice and buckwheat husk, flax sheave, and other vegetable residues. Typical requirements for the feedstock: water content – 6...12%, fraction composition – 2...10 mm.

Becoming the Nuclear-Front-End

2017 ◽  
Vol 47 (189) ◽  
Author(s):  
Patrick Schukalla
Keyword(s):  
Nuclear Reactor ◽  
Chemical Elements ◽  
High Technology ◽  
Power Production ◽  
Uranium Mining ◽  
Nuclear Industry ◽  
Current State ◽  
Front End ◽  
Production And Consumption ◽  
Uranium Exploration

Uranium mining often escapes the attention of debates around the nuclear industries. The chemical elements’ representations are focused on the nuclear reactor. The article explores what I refer to as becoming the nuclear front – the uranium mining frontier’s expansion to Tanzania, its historical entanglements and current state. The geographies of the nuclear industries parallel dominant patterns and the unevenness of the global divisions of labour, resource production and consumption. Clearly related to the developments and expectations in the field of atomic power production, uranium exploration and the gathering of geological knowledge on resource potentiality remains a peripheral realm of the technopolitical perceptions of the nuclear fuel chain. Seen as less spectacular and less associated with high-technology than the better-known elements of the nuclear industry the article thus aims to shine light on the processes that pre-figure uranium mining by looking at the example of Tanzania.

scholarly journals Ritual Economy and the Organization of Scioto Hopewell Craft Production: Insights from the Outskirts of the Mound City Group

2020 ◽  
Vol 85 (2) ◽  
pp. 279-304
Author(s):  
Timothy D. Everhart ◽  
Bret J. Ruby
Keyword(s):  
Craft Production ◽  
Small Scale ◽  
Magnetic Survey ◽  
Middle Woodland ◽  
The North ◽  
Large Structures ◽  
Production Site ◽  
Production And Consumption ◽  
Ritual Economy ◽  
City Group

This article offers insights into the organization of Scioto Hopewell craft production and examines the implications of this organization through the lens of ritual economy. We present a novel analysis of investigations at the North 40 site, concluding that it is a craft production site located on the outskirts of the renowned Mound City Group. High-resolution landscape-scale magnetic survey revealed a cluster of three large structures and two rows of associated pits; one of the buildings and three of the pits were sampled in excavations. Evidence from the North 40 site marks this as the best-documented Scioto Hopewell craft production site. Mica, chert, and copper were crafted here in contexts organized outside the realm of domestic household production and consumption. Other material remains from the site suggest that crafting was specialized and embedded in ceremonial contexts. This analysis of the complex organization of Scioto Hopewell craft production provides grounds for further understanding the elaborate ceremonialism practiced by Middle Woodland (AD 1–400) societies and adds to the known complexity of craft production in small-scale societies. Furthermore, this article contributes to a growing body of literature demonstrating the utility of ritual economy as a framework for approaching the sociality of small-scale societies.

scholarly journals A Model-Based Tool for Assessing the Impact of Land Use Change Scenarios on Flood Risk in Small-Scale River Systems—Part 1: Pre-Processing of Scenario Based Flood Characteristics for the Current State of Land Use

Hydrology ◽  
2021 ◽  
Vol 8 (3) ◽  
pp. 102
Author(s):  
Frauke Kachholz ◽  
Jens Tränckner
Keyword(s):  
Land Use ◽  
River Flow ◽  
Land Use Changes ◽  
Small Rivers ◽  
Small Scale ◽  
Model Parameters ◽  
Ungauged Catchments ◽  
Model Based ◽  
Current State ◽  
The Impact

Land use changes influence the water balance and often increase surface runoff. The resulting impacts on river flow, water level, and flood should be identified beforehand in the phase of spatial planning. In two consecutive papers, we develop a model-based decision support system for quantifying the hydrological and stream hydraulic impacts of land use changes. Part 1 presents the semi-automatic set-up of physically based hydrological and hydraulic models on the basis of geodata analysis for the current state. Appropriate hydrological model parameters for ungauged catchments are derived by a transfer from a calibrated model. In the regarded lowland river basins, parameters of surface and groundwater inflow turned out to be particularly important. While the calibration delivers very good to good model results for flow (Evol =2.4%, R = 0.84, NSE = 0.84), the model performance is good to satisfactory (Evol = −9.6%, R = 0.88, NSE = 0.59) in a different river system parametrized with the transfer procedure. After transferring the concept to a larger area with various small rivers, the current state is analyzed by running simulations based on statistical rainfall scenarios. Results include watercourse section-specific capacities and excess volumes in case of flooding. The developed approach can relatively quickly generate physically reliable and spatially high-resolution results. Part 2 builds on the data generated in part 1 and presents the subsequent approach to assess hydrologic/hydrodynamic impacts of potential land use changes.

scholarly journals Agile Transformation at Scale: A Tertiary Study

2021 ◽  
pp. 3-11
Author(s):  
Suddhasvatta Das ◽  
Kevin Gary
Keyword(s):  
Large Scale ◽  
Software Industry ◽  
Future Research ◽  
Small Scale ◽  
Agile Processes ◽  
Current State ◽  
Research Findings ◽  
State Of Research ◽  
Agile Software ◽  
Tertiary Study

AbstractDue to the fast-paced nature of the software industry and the success of small agile projects, researchers and practitioners are interested in scaling agile processes to larger projects. Agile software development (ASD) has been growing in popularity for over two decades. With the success of small-scale agile transformation, organizations started to focus on scaling agile. There is a scarcity of literature in this field making it harder to find plausible evidence to identify the science behind large scale agile transformation. The objective of this paper is to present a better understanding of the current state of research in the field of scaled agile transformation and explore research gaps. This tertiary study identifies seven relevant peer reviewed studies and reports research findings and future research avenues.

scholarly journals History of buildingand operation of the Nizhny Tulom hydroelectric power plant on the Kola Peninsula.

2020 ◽  
Vol 11 (7-2020) ◽  
pp. 19-32
Author(s):  
Olga E. Konovalova ◽  
◽  
Nikolai M. Kuznetsov ◽  
Keyword(s):  
Hydroelectric Power Plant ◽  
Hydroelectric Power Station ◽  
Hydroelectric Power ◽  
Power Station ◽  
Construction Time ◽  
Current State ◽  
Production And Consumption ◽  
Great Patriotic War ◽  
History Of ◽  
The Cost

The article tells the story of the creation of the Nizhne-Tulomskaya hydroelectric power station (HPP). The main energy parameters of the hydroelectric power station, the layoutof the main structures of the station, and archival photos of the construction time are given. Data on the production and consumption of electricity for own needs, the cost of 1 kW·h during the great Patriotic war are shown. It is told about the reconstruction and current state of the station.

scholarly journals Modularity of Pressing Tools for Screw Press Producing Solid Biofuels

10.14311/1558 ◽  
2012 ◽  
Vol 52 (3) ◽  
Author(s):  
Miloš Matúš ◽  
Peter Križan
Keyword(s):  
Mathematical Model ◽  
Modular Design ◽  
Screw Press ◽  
Axial Forces ◽  
Solid Biofuels ◽  
Solid Biofuel ◽  
Complicated Process ◽  
Comprehensive Study

This paper focuses on the development of the newly-patented structure of a screw briquetting machine for compacting biomass into a solid biofuel. The design of the machine is based on the results of a comprehensive study of the complicated process of biomass compaction. The patented structure meets two main goals: the elimination of axial forces, leading to increased lifetime of the bearings, and the new modular design of a pressing chamber and tools with their geometry based on the application of a mathematical model.

scholarly journals Integration Efforts in Agriculture

2018 ◽  
Vol 12 (1-2) ◽  
pp. 91-96
Author(s):  
Judit Beke Lisányi
Keyword(s):  
Rural Areas ◽  
Agricultural Sector ◽  
Driving Forces ◽  
Jel Classification ◽  
Small Scale ◽  
Consumer Prices ◽  
Downward Pressure ◽  
Negative Impacts ◽  
Capital Intensive

The economic and political transition brought many challenges for the Hungarian agricultural sector. The break-up of large agricultural holdings had serious negative impacts on food production and on the export of agricultural products. Capital intensive profit-seeking intermediaries dominate the trading of agricultural goods that has injurious effects in terms of downward pressure on production prices and an increase in consumer prices. Cooperatives have a key role in effectively tackling the common challenges that small-scale producers have to face. More vertical integration along the food chain could contribute to providing rural employment and to an increase in living standards in rural areas. This study reviews the development, the specific features and the driving forces of modern cooperatives in Central Europe in general, and in Hungary in particular. The focus is on the integrator role of cooperatives and their future role in our globalised world. JEL Classification: Q10, Q13

scholarly journals Backward erosion progression rates from small-scale flume tests

2021 ◽  
Author(s):  
Axel Montalvo-Bartolomei ◽  
Bryant Robbins ◽  
Jamie López-Soto
Keyword(s):  
Failure Probability ◽  
Internal Erosion ◽  
Small Scale ◽  
Army Corps ◽  
Progression Rate ◽  
Army Corps Of Engineers ◽  
Current State ◽  
Flume Tests ◽  
Temporal Aspects ◽  
Backward Erosion Piping

Backward erosion piping (BEP) is an internal erosion mechanism by which erosion channels progress upstream, typically through cohesionless or highly erodible foundation materials of dams and levees. As one of the primary causes of embankment failures, usually during high pool events, the probability of BEP-induced failure is commonly evaluated by the U.S. Army Corps of Engineers for existing dams and levees. In current practice, BEP failure probability is quantitatively assessed assuming steady state conditions with qualitative adjustments for temporal aspects of the process. In cases with short-term hydraulic loads, the progression rate of the erosion pipe may control the failure probability such that more quantitative treatment of the temporal development of erosion is necessary to arrive at meaningful probabilities of failure. This report builds upon the current state of the practice by investigating BEP progression rates through a series of laboratory experiments. BEP progression rates were measured for nine uniform sands in a series of 55 small-scale flume tests. Results indicate that the pipe progression rates are proportional to the seepage velocity and can be predicted using equations recently proposed in the literature.

Sign in / Sign up

Export Citation Format

Share Document