Energy efficiency improvement of dryer section heat recovery systems in paper machines – A case study

Sivill, Leena; Ahtila, Pekka

doi:10.1016/j.applthermaleng.2009.06.022

Cited by 27 publications

(12 citation statements)

References 29 publications

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“…Specifically, research has shown that the potential for reducing energy use in energy-intensive Swedish firms was evaluated to be 18%: a 5% reduction in current energy use by energy-efficient technologies and 13% by improved EnM practices [26]. Nevertheless, most of the research on EnM for improving EE in PPI has focused on EE improvements via technology (e.g., [27][28][29]). …”

Section: Figurementioning

confidence: 99%

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Drivers, Barriers, and Success Factors for Improving Energy Management in the Pulp and Paper Industry

2018

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Successful energy management is a way to achieve energy efficiency in the pulp and paper industry (PPI), which is important for assuring energy supply security, for increasing economic competitiveness, and for mitigating greenhouse gases. However, research shows that although energy use within PPI can be reduced by 5.5-19.4% per year, some of this by energy management practices, energy management is not always implemented. Why is this so? What are the barriers to, and drivers of implementation? How can the barriers be overcome? A systematic review of barriers and drivers in energy management in the PPI within peer-reviewed scientific articles suggests that the world-wide events that affect energy supply, volatility, and use seemingly also affect the number and frequency of research articles on energy management in the PPI. The perception of energy management in the PPI seems to be dominated by the understanding that it can mostly be achieved through technological improvements aiming to improve energy efficiency. The main driver of energy management was shown to be economic conditions: high and unstable energy prices, followed by drivers such as the need to remain internationally competitive, collaboration and energy management systems. Meanwhile, examples of the most important barriers are technical risks, lack of access to capital, lack of time and other priorities, and slim organization. The success factors for enhancing drivers and overcoming barriers were continuous energy accounting, energy-related collaboration, energy-efficiency programmes, and benchmarking. Altogether, success factors for energy management for improved energy efficiency could be summarized in the 4M framework-the "4M for energy efficiency": mind, measure, monitor, and manage-that could be used as the energy management memory-tool that could lead to improved energy efficiency in other sectors as well.

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Section: Figurementioning

confidence: 99%

“…Some studies have focused on specific niche solutions potentially leading to improved EE, for example, EE improvements in dryer-section heat recovery systems in paper machines have led to a 7-13% decrease in the specific heat use [27]. Other studies have focused on broader solutions involving several actors within a small geographical area.…”

Section: Figurementioning

confidence: 99%

Drivers, Barriers, and Success Factors for Improving Energy Management in the Pulp and Paper Industry

2018

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“…Management of steam pressure during a paper grade change operation is very important and Magnus [6] presented dynamic modeling simulations of steam supplying systems for multiple drying cylinders during a grade change operation. Sivill [7] tried to reduce operational cost based on the thermodynamic modeling of heat recovery rate from drying equipments. Lu et al [8] presented mathematical and experimental description on the moisture content of the paper web by using heat and mass transport phenomena during phase changes within porous media.…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling of paper drying processes

Heo

Cho

Yeo

2011

Korean J. Chem. Eng.

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A dynamic model describing the behavior of a multi-cylinder drying section in paper production plants was developed based on the mass and heat balances around drying cylinders. The balance equations consist of sets of differential equations describing heat and mass transfer around the canvas, the web and the drying cylinders. Values of cylinder temperatures and moisture contents were estimated and compared with operation data. To obtain further information for energy consumption, the generation of entropy at each drying cylinder was investigated based on the model developed.

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“…In 2008, the share of energy in the total production costs was up to 30% for some mills [1]. Therefore this section of the paper machine has been a subject of numerous energy efficiency studies [1][2][3][4]. 15, No.…”

Section: Introductionmentioning

confidence: 99%

Waste heat potentials in the drying section of the paper machine in Umka Cardboard Mill

et al. 2011

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Paper production is one of the most energy intensive industrial processes. The use of waste heat is very important for energy efficiency improvement in paper industry. This paper deals with methods for calculation of potentials of waste heat generated in paper/board production process. For that purpose, the material and heat balance of the cardboard machine at Umka Cardboard Mill has been determined. Field measurements were conducted in order to define the unknown values of process parameters used for calculation in the balance equations and modelling. The focus was given to the cardboard drying section, which consumes most of the energy supplied to the machine. Additional aim of the work presented in the paper was to evaluate the specific energy consumption and the thermal efficiency of all individual energy units within the machine’s drying section. The results indicate two main sources of waste heat: waste heat released to the atmosphere with the discharge air from the present waste heat recovery system (14,380 kW); and waste heat released into the hall from the machine and extracted by the hall ventilation system (4,430 kW). Waste heat from both sources is characterized by fairly low temperatures 58-75ºС and fairly high moisture content (30-40 g/kg). The waste heat can be partly utilized for preheating the fresh air in cardboard drying process, saving up to 13% of steam consumption. The specific heat consumption and specific steam consumption (consumption per tonne of produced cardboard) of the machine was 1,490 kWh/t and 1.4 t/t, respectively. The thermal efficiency of drying section and coating drying section was 55.6% and 33.6%, respectively. All these figures imply necessity for further waste heat utilization with the aim of improving the efficiency of energy use

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Energy efficiency improvement of dryer section heat recovery systems in paper machines – A case study

Cited by 27 publications

References 29 publications

Drivers, Barriers, and Success Factors for Improving Energy Management in the Pulp and Paper Industry

Drivers, Barriers, and Success Factors for Improving Energy Management in the Pulp and Paper Industry

Dynamic modeling of paper drying processes

Waste heat potentials in the drying section of the paper machine in Umka Cardboard Mill

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