Selaus tekijän mukaan kokoelmassa "Vakkilainen, Esa"Tieteelliset julkaisut
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A comparison of turbulence models and two and three dimensional meshes for unsteady CFD ash deposition tools
García Pérez, Manuel; Vakkilainen, Esa (Elsevier, 2019)This work aims to assess the adequacy of the often made two dimensional mesh simplification in ash deposition models. Little information is available regarding its validity due to the heavy computational costs that a proper ... -
A survey analysis of the wood pellet industry in Finland: Future perspectives
Proskurina, Svetlana; Alakangas, Eija; Heinimö, Jussi; Mikkilä, Mirja; Vakkilainen, Esa (Elsevier Ltd, 2017)Finland has the greatest forest cover of European countries and thus considerable raw material potential for wood pellet market development. Wood pellet production and consumption volumes in the country have increased ... -
Bioenergy Perspectives in the EU Regions: Carbon Neutrality Pathway
Proskurina, Svetlana; Vakkilainen, Esa; Stolarski, Mariusz Jerzy (Scientific Research Publishing Inc., 01.03.2023)Bioenergy plays an important role in the climate neutrality targets of the EU. However, the status of bioenergy implementation varies greatly across the EU. The aim of this paper is to assess the role of bioenergy in ... -
Biomass for industrial applications: The role of torrefaction
Proskurina, Svetlana; Heinimö, Jussi; Schipfer, Fabian; Vakkilainen, Esa (Elsevier Ltd, 2017)Torrefied biomass has considerable potential as a biomass fuel to replace coal in energy and process heat production. The aim of this paper is to evaluate the potential of torrefied biomass in different industries, both ... -
Biomass-based carbon capture and utilization in kraft pulp mills
Kuparinen, Katja; Vakkilainen, Esa; Tynjälä, Tero (Springer Netherlands, 04.01.2019)Corporate image, European Emission Trading System and Environmental Regulations, encourage pulp industry to reduce carbon dioxide (CO2) emissions. Kraft pulp mills produce CO2 mainly in combustion processes. The largest ... -
Characterization of residual biomasses from the coffee production chain and assessment the potential for energy purposes
Mendoza Martinez, Clara Lisseth; Alves Rocha, Elém Patrícia; Oliveira Carneiro, Angélica de Cassia; Borges Gomes, Fernando José; Ribas Batalha, Larisse Aparecida; Vakkilainen, Esa; Cardoso, Marcelo (Elsevier, 19.11.2018)Chemical quantitative characterization of biomass is relevant for waste to energy recovery technologies. In the present work, selected agroindustry solid residues from coffee crops – parchment and coffee shrub, i.e., stem, ... -
Comparison of Model-Based Flow Rate Estimation Methods in Frequency-Converter-Driven Pumps and Fans
Tamminen, Jussi; Viholainen, Juha; Ahonen, Tero; Ahola, Jero; Hammo, Simo; Vakkilainen, Esa (Springer, 2014)Fluid handling systems such as pump and fan systems are found to have a significant potential for energy efficiency improvements. To deliver the energy saving potential, there is a need for easily implementable methods to ... -
Data demonstrating the Finnish wood pellet industry and future perspectives
Proskurina, Svetlana; Heinimö, Mirja; Heinimö, Jussi; Vakkilainen, Esa (Elsevier Ltd, 2017)This article contains data related to the research article entitled “A survey analysis of the wood pellet industry in Finland: Future perspectives" (S. Proskurina, E. Alakangas, J. Heinimö, M. Mikkilä, E. Vakkilainen, 2016) ... -
Effect of heat integration method and torrefaction temperature on the performance of an integrated CHP-torrefaction plant
Sermyagina, Ekaterina; Saari, Jussi; Zakeri, Behnam; Kaikko, Juha; Vakkilainen, Esa (Elsevier, 01.07.2015)An important factor for industrial-scale implementation of torrefaction – a thermal pre-treatment technology that enhances the fuel characteristics of biomass – is the requirement for a low-cost source of heat energy. ... -
Fast oxidative pyrolysis of eucalyptus wood residues to replace fossil oil in pulp industry
Mendoza-Martinez, Clara; Sermyagina, Ekaterina; Saari, Jussi; Faria Ramos, Vinicius; Vakkilainen, Esa; Cardoso, Marcelo; Alves Rocha, Elem Patricia (Elsevier, 15.01.2023)This study evaluates the potential of the oxidative fast pyrolysis (OFP) of eucalyptus wood residues (EWR) for producing bio-oil to replace fossil fuels in the lime kilns of the pulp industry. OFP is an alternative to ... -
Five years left – How are the EU member states contributing to the 20% target for EU's renewable energy consumption; the role of woody biomass
Proskurina, Svetlana; Sikkema, Richard; Heinimö, Jussi; Vakkilainen, Esa (Elsevier Ltd, 2016)The European Union has set ambitious targets of raising the share of EU energy consumption produced from renewable resources from 20% by 2020 to 27% by 2030. The aim of this paper is to assess the role of woody biomass in ... -
Global biomass trade for energy – Part 1: Statistical and methodological considerations
Proskurina, Svetlana; Junginger, Martin; Heinimö, Jussi; Vakkilainen, Esa (Society of Chemical Industry and John Wiley & Sons, Ltd, 2017)Many countries have limited, low-cost biomass resources to satisfy their own demand for bioenergy. International trade of biomass in various solid and liquid forms is consequently increasing. The aim of this study is to ... -
Global biomass trade for energy— Part 2: Production and trade streams of wood pellets, liquid biofuels, charcoal, industrial roundwood and emerging energy biomass
Proskurina, Svetlana; Junginger, Martin; Heinimö, Jussi; Tekinel, Beysin; Vakkilainen, Esa (Society of Chemical Industry and John Wiley & Sons, Ltd, 2018)Many countries have limited low-cost biomass resources to satisfy their own demand for bioenergy; consequently, international trade in biomass in various liquid and solid forms is increasing. The aim of this study is to ... -
Hydrothermal carbonization of coniferous biomass: Effect of process parameters on mass and energy yields
Sermyagina, Ekaterina; Saari, Jussi; Kaikko, Juha; Vakkilainen, Esa (Elsevier, 05 / 2015)Hydrothermal carbonization of biomass presents a promising way to improve fuel characteristics of biomass without preliminary drying. In this process, feedstock is subjected to heating with water at temperatures between ... -
Hydrothermal carbonization of lignocellulosic agro-forest based biomass residues
Mendoza Martinez, Clara Lisseth; Sermyagina, Ekaterina; Saari, Jussi; Silva de Jesus, Marcia; Cardoso, Marcelo; Matheus de Almeida, Gustavo; Vakkilainen, Esa (Elsevier, 25.02.2021)To increase the understanding of hydrothermal carbonization (HTC) of lignocellulosic biomass residues, four feedstocks: giant bamboo, coffee wood, eucalyptus, and coffee parchment, were studied. The effect of operating ... -
Integration of torrefaction and CHP plant: Operational and economic analysis
Sermyagina, Ekaterina; Saari, Jussi; Kaikko, Juha; Vakkilainen, Esa (Elsevier, 01.12.2016)Biomass torrefaction is a pre-treatment technology with high potential to convert biomass into a valuable commodity. The heat integration of torrefaction and combined heat and power (CHP) plant was investigated in previous ... -
Logistical, economic, environmental and regulatory conditions for future wood pellet transportation by sea to Europe: The case of Northwest Russian seaports
Proskurina, Svetlana; Rimppi, Helli; Heinimö, Jussi; Hansson, Julia; Orlov, Anton; Raghu, KC; Vakkilainen, Esa (Elsevier Ltd, 2016)International trade in biomass for energy is growing and wood pellets have become a very successful internationally traded bioenergy-based commodity. Russian wood pellets have captured an important share of European markets. ... -
Pre-treatment of coniferous biomass via hydrothermal carbonization and torrefaction: mass and energy yields
Sermyagina, Ekaterina; Saari, Jussi; Vakkilainen, Esa (Benet Ltd., 09 / 2015)Fuel properties of woody biomass could be significantly improved with several pre-treatment technologies. This paper presents the results of experimental comparison of hydrothermal carbonization and torrefaction processes ... -
Production and characterization of coffee-pine wood residue briquettes as an alternative fuel for local firing systems in Brazil
Mendoza Martinez, Clara Lisseth; Sermyagina, Ekaterina; de Cassia Oliveira Carneiro, Angélica; Vakkilainen, Esa; Cardoso, Marcelo (Elsevier, 26.02.2019)In this work, the production viability, physical, chemical and mechanical properties of briquettes produced from mixtures of coffee shrub residues and pinewood, were evaluated. The densification was carried out under ... -
Recovery boilers - history and future
Vakkilainen, Esa (Suomen Soodakattilayhdistys - Finnish recovery boiler committee, 11.06.2014)Recovery boilers are built all over the world. The roots of recovery technology are longer than the roots of recovery boilers. But it wasn’t until the invention of recovery boilers before the Second World War that the ...