Improving energy efficiency of sawmill industrial sites by integration with pellet and CHP plants

Anderson, Jan-Olof; Toffolo, Andrea

doi:10.1016/j.apenergy.2013.05.066

Cited by 40 publications

(22 citation statements)

References 12 publications

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“…In CHP plants, the system of heat generation is parallel with electricity production, producing steam, hot water, or chilled water, optimally designed for the customer's needs and requirements of heating factories, green houses, etc. The total plant efficiency of CHP can reach 85%-90% [34]. The typical size of CHP plants is usually ten times smaller (from 1 to100 MW) than coal-based plants, depending on the availability of local feedstocks.…”

Section: The Role Of Power Generation Methods In the Lcamentioning

confidence: 99%

The Comparative Life Cycle Assessment of Power Generation from Lignocellulosic Biomass

2015

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Abstract:In order to solve the energy crisis and reduce emissions of greenhouse gases (GHG), renewable energy resources are exploited for power generation. Because lignocellulosic biomass resources are abundant and renewable, various technologies are applied to using lignocellulosic biomass to derive biofuel and electricity. This paper focuses on power generation from lignocellulosic biomass and comparison of the effects of different feedstocks, transportation, and power generation technologies evaluated through life cycle assessment (LCA). The inputs and boundaries of LCA vary with different feedstocks, such as forestry wood, agricultural residues, and fast-growing grass. For agricultural residues and fast-growing grass, the transportation cost from field to power plant is more critical. Three technologies for power generation are analyzed both with and without pelletization of lignocellulosic biomass. The GHG emissions also vary with different feedstocks and depend on burning technologies at different plant scales. The daily criteria pollutant emissions of power generation from different lignocellulosic biomass were evaluated with a life cycle assessment model of GREET.net 2014. It is concluded that bio-power generation is critical with the urgency of greenhouse effects. OPEN ACCESSSustainability 2015, 7 12975

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Section: The Role Of Power Generation Methods In the Lcamentioning

confidence: 99%

The Comparative Life Cycle Assessment of Power Generation from Lignocellulosic Biomass

2015

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“…The corresponding amount of biomass by-products, in the form of woodchips, bark and sawdust, is about the same in terms of dry mass [2]. Biomass utilization has been gaining interest as a means to achieve the targets related to the reduction of greenhouse gas emissions and to the increase of the share of renewables in the energy mix.…”

Section: Introductionmentioning

confidence: 98%

“…This by-product, the biomass fuel mix (BFM), is composed of woodchips (about 26% of the timber input on a dry mass basis), bark (19%) and sawdust (8%). If the sawmill is not integrated with other processes/plants that can supply heat, an amount of BFM corresponding to 10.3% of the timber input on a dry mass basis has to be consumed internally in a dedicated furnace mainly to satisfy the lumber drying process [2]. In fact, timber is initially supplied at 55%-60% moisture content, while lumber has a final moisture content of 18%.…”

Section: Sawmillmentioning

confidence: 99%

“…The model of a typical Nordic sawmill is taken from [2]. Accordingly, about 47% of the timber input is converted into lumber (the main product) on a dry mass basis.…”

Section: Sawmillmentioning

confidence: 99%

“…Several plausible alternative processes are reported in the literature; see, e.g., [3,6,[9][10][11][12][13]. The production of SNG from biomass is generally considered to be made of three main process stages: gasification of the lignocellulosic biomass into raw syngas (mainly composed of H 2 , CO, CO 2 and CH 4 on a dry basis), methanation (catalytic conversion of the syngas into crude SNG) and upgrading of the crude SNG to the gas pipeline specifications (which implies CO 2 and H 2 O removal). Others studies (see, e.g., [14][15][16][17]) also focus on the production of SNG from various renewable energy resources, such as wind and solar via electrolysis of water to produce hydrogen, which afterwards is used in hydrogenation of CO 2 to produce SNG.…”

Section: Introductionmentioning

confidence: 99%

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Integrated SNG Production in a Typical Nordic Sawmill

Mesfun

Anderson²,

Umeki

et al. 2016

Energies

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Advanced biomass-based motor fuels and chemicals are becoming increasingly important to replace fossil energy sources within the coming decades. It is likely that the new biorefineries will evolve mainly from existing forest industry sites, as they already have the required biomass handling infrastructure in place. The main objective of this work is to assess the potential for increasing the profit margin from sawmill byproducts by integrating innovative downstream processes. The focus is on the techno-economic evaluation of an integrated site for biomass-based synthetic natural gas (bio-SNG) production. The option of using the syngas in a biomass-integrated gasification combined cycle (b-IGCC) for the production of electricity (instead of SNG) is also considered for comparison. The process flowsheets that are used to analyze the energy and material balances are modelled in MATLAB and Simulink. A mathematical process integration model of a typical Nordic sawmill is used to analyze the effects on the energy flows in the overall site, as well as to evaluate the site economics. Different plant sizes have been considered in order to assess the economy-of-scale effect. The technical data required as input are collected from the literature and, in some cases, from experiments. The investment cost is evaluated on the basis of conducted studies, third party supplier budget quotations and in-house database information. This paper presents complete material and energy balances of the considered processes and the resulting process economics. Results show that in order for the integrated SNG production to be favored, depending on the sawmill size, a biofuel subsidy in the order of 28-52 €/MWh SNG is required.

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Energy Control and Optimization for Manufacturing Systems Utilizing Combined Heat and Power System

2022

Sustainable Manufacturing Systems

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Improving energy efficiency of sawmill industrial sites by integration with pellet and CHP plants

Cited by 40 publications

References 12 publications

The Comparative Life Cycle Assessment of Power Generation from Lignocellulosic Biomass

The Comparative Life Cycle Assessment of Power Generation from Lignocellulosic Biomass

Integrated SNG Production in a Typical Nordic Sawmill

Energy Control and Optimization for Manufacturing Systems Utilizing Combined Heat and Power System

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