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The evolution of reel statistical methods, TAPPI Journal June 2019
ABSTRACT: Multiple statistical methods for calculating the variance partition analysis (VPA) of reel data have existed for decades. In the paper industry, VPA is also commonly known as reel statistics. VPA commonly consists of total variance (TOT) that is then divided into three components: cross direction (CD), machine direction (MD), and residual (RES). A common mathematical procedure is referred to as ANOVA (analysis of variance). TAPPI Standard Test Method T 545 “Cross-machine grammage profile measurement (gravimetric method)” addresses paper testing and includes the ANOVA equations that have also been used to analyze scanning data.In the 1990s, TAPPI published TIP 1101-01 “Calculation and partitioning of variance using paper machine scanning sensor measurements,” which contained simple formulas that were easy to implement and could be used by a nov-ice to generate statistics on a spreadsheet. All involved quality control system (QCS) suppliers agreed to support this common method in their QCS. TIP 1101 was recently revised, and this paper concerns the analysis of data collected from a scanning sensor in a QCS and the creation of a common method for the calculation of reel statistics by TAPPI’s Process Control Division.
Journal articles
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Navigator Cacia Optimizes Causticizing Process Targets, Paper360º March/April 2019
Navigator Cacia Optimizes Causticizing Process Targets, Paper360º March/April 2019
Journal articles
Magazine articles
Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018
Contrasting underlying mechanisms of different barrier coating types, TAPPI Journal January 2018
Journal articles
Magazine articles
Leading our Industry, Paper360º May/June 2018
Leading our Industry, Paper360º May/June 2018
Journal articles
Magazine articles
Metsä Group’s Äänekoski Bioproduct Mill: At the Heart of the Bioeconomy, Paper360º November/December 2018
Metsä Group’s Äänekoski Bioproduct Mill: At the Heart of the Bioeconomy, Paper360º November/December 2018
Journal articles
Magazine articles
Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018
Impact of fiber structure on edge-wicking of highly-sized paperboard, TAPPI JOURNAL August 2018
Journal articles
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Paper Machine Water Efficiency, Paper360º July/August 2020
Paper Machine Water Efficiency, Paper360º July/August 2020
Journal articles
Magazine articles
Case study: Paper mill power plant optimization—balancing steam venting with mill demand, TAPPI Journal June 2020
ABSTRACT: Most Power departments are tasked with generating steam to support mill wide operations, generate electricity, and reduce operating costs. To accomplish these tasks, power boilers generate high pressure steam that is reduced to intermediate and low pressures for process utilization in the mill by means of steam turbine generator extraction or pressure reducing valves. The most economical method to reduce steam pressure is the use of steam turbine generators, as electricity is generated from the steam when it is reduced in pressure. Electricity that is produced by these generators provides a substantial financial benefit and helps offset overall operational costs. To achieve tangible financial gains, the mill must evaluate the overall cost of steam production and the price of electricity.The current work provides a case study of power plant optimization that evaluated electricity production and steam production costs balanced with mill steam demand. Process and cost optimization led to a significant reduc-tion in low pressure steam venting, resulting in reduced fuel consumption and reduced operating cost.
Journal articles
Magazine articles
Preventive Maintenance Cards, Anyone?, Paper360º March/April 2020
Preventive Maintenance Cards, Anyone?, Paper360º March/April 2020
Journal articles
Magazine articles
2020 TAPPI/PIMA Awards:, Paper360º May/June 2020
2020 TAPPI/PIMA Awards:, Paper360º May/June 2020