scholarly journals Nonlinear Modeling of Moisture Control of Drying Process in Paper Machine

2012 ◽  
Vol 38 ◽  
pp. 1104-1111 ◽  
Author(s):  
C. Karthik ◽  
K. Valarmathi ◽  
M. Rajalakshmi
Keyword(s):  
Nonlinear Modeling ◽  
Paper Machine ◽  
Drying Process ◽  
Moisture Control

HYGROTHERMAL PERFORMANCE ASSESSMENT OF ICF WALLS WITH DIFFERENT MOISTURE CONTROL STRATEGIES AND WALL DESIGNS

2017 ◽  
Vol 12 (4) ◽  
pp. 35-53 ◽  
Author(s):  
Emishaw Iffa ◽  
Fitsum Tariku
Keyword(s):  
Moisture Transfer ◽  
Control Strategies ◽  
Vapor Permeability ◽  
Transfer Model ◽  
Drying Process ◽  
Moisture Control ◽  
Hygrothermal Performance ◽  
Insulation Thickness ◽  
Insulated Concrete Forms ◽  
The Impact

The initial high moisture content of concrete and the low vapor permeability of insulation layers on both sides of the concrete complicate the drying process of Insulated Concrete Forms (ICF). In order to facilitate the moisture transport and enhance the drying process, different moisture control strategies and wall designs can be implemented. The application of an air and vapor barrier is one of the most common moisture control strategies. In this paper, the impact of vapor permeance of an air and vapor barriers on the hygrothermal performance of an ICF wall in three different cold and wet climates is examined using a validated Heat-Air-Moisture transfer model. The hygrothermal performance of an ICF wall assembly with different types of barriers and locations in the wall system for several wall designs is investigated. Results indicate that a smaller thickness of insulation on the outside facilitates removing the moisture towards the outside and installing low permeance air/vapor barrier systems on the outside prohibits drying and drives the moisture to the inside. Our findings also show that with the proper selection of insulation thickness and vapor control strategy moisture-related problems can be avoided.

Spraying starch on the Fourdrinier— An option between wet end starch and the size press

TAPPI Journal ◽  
2021 ◽  
Vol 20 (1) ◽  
pp. 21-26
Author(s):  
COLE PRICE ◽  
MARTIN A. HUBBE
Keyword(s):  
Bonding Strength ◽  
Fiber Suspension ◽  
Paper Machine ◽  
Drying Process ◽  
Starch Solution ◽  
Paper Drying ◽  
Starch Grains ◽  
Wet Surface ◽  
Recycled Fibers

Technology to apply suspensions of starch grains to the wet surface of paper, during the dewatering process, is reviewed. Though the technology is not new, it continues to attract the attention of papermakers as a means to increase bonding strength. Starch grains that are sprayed onto the wet-web of paper can be retained at levels exceeding what can be effectively added to the fiber suspension at the wet end. Unlike adding a starch solution at a size press, no additional drying capacity is required on the paper machine. To be effective, the starch needs to be able to swell and develop bonding during the paper drying process. Paperboard applications with recycled fibers appear to be a good fit. There is potential to increase bonding by processes that favor fuller gelatinization of the starch grains by the time the paper becomes dry.

A study of a hygrothermal method of grain moisture control in the drying process

2012 ◽  
Vol 55 (1) ◽  
pp. 104-107 ◽  
Author(s):  
A. F. Khairetdinova ◽  
R. I. Saitov ◽  
R. G. Abdeev ◽  
N. S. Talipov
Keyword(s):  
Drying Process ◽  
Moisture Control ◽  
Grain Moisture

Genetic Algorithm-Based Optimization of Steam Consumption of Dryer Section in Paper Machine

2014 ◽  
Vol 472 ◽  
pp. 180-184 ◽  
Author(s):  
Wei Tang ◽  
Yang Zhou ◽  
Wen Tao Gan
Keyword(s):  
Genetic Algorithm ◽  
Objective Function ◽  
Air Temperature ◽  
Great Influence ◽  
Paper Machine ◽  
Drying Process ◽  
Steam Consumption ◽  
Key Factor ◽  
Method Optimization ◽  
Simulation Results

In paper dryer section of the paper machine, paper dehydration is small, but the steam consumption for the process of dehydration is very large, this steam consumption has a great influence to the total steam consumption of the whole papermaking process. A method optimization of the dryer section based on genetic algorithm is proposed to reduce the dryer section steam consumption, which can reduce the total steam consumption of the papermaking process. After analyzing steam consumption of the whole drying process, the result is that the temperature of dryer section air is the key factor that influences the steam consumption. The model of paper machine dryer section is build with supply air temperature as a variable and steam consumption as the objective function, then using the genetic algorithm to optimize the supply air temperature. Simulation results show that after optimizing air temperature by genetic algorithm steam consumption of papermaking process is further reduced.

Waste Heat Integration of Coating Paper Machine Drying Process

2011 ◽  
Vol 29 (4) ◽  
pp. 442-450 ◽  
Author(s):  
Lingbo Kong ◽  
Huanbin Liu ◽  
Jigeng Li ◽  
Jinsong Tao
Keyword(s):  
Waste Heat ◽  
Heat Integration ◽  
Paper Machine ◽  
Drying Process

scholarly journals New Moisture Control Method for Paper Machine.

1996 ◽  
Vol 50 (1) ◽  
pp. 120-124 ◽  
Author(s):  
Ryoichi Mori
Keyword(s):  
Control Method ◽  
Paper Machine ◽  
Moisture Control

Research on the System Decomposition on Papermaking Drying Process Based on Muti-Agent

2011 ◽  
Vol 347-353 ◽  
pp. 3175-3178
Author(s):  
Ding Hua Zhang ◽  
Huan Bin Liu ◽  
Ji Geng Li
Keyword(s):  
Energy Consumption ◽  
Computer Network ◽  
Optimal Strategies ◽  
Paper Machine ◽  
Drying Process ◽  
Network Systems ◽  
System Decomposition ◽  
Coordination Model ◽  
Multi Agent ◽  
And Performance

According to each subsystem of its own energy-consumption characteristics in paper machine dryer section, taking heat transfer in the dryer section as paramount, the stepwise recovery and optimal use of steam as the target to decompose the multi-Agent energy consumption network. It’s combined with optimal strategies of decomposition and coordination in the process of energy integrated optimization, the divisional principle of Agent functional specifications, the structure and performance of computer network systems. The paper discussed the energy network topology of multi Agent overall nodes in paper machine dryer section that provide the foundation for research on the Energy-saving Optimization Coordination Model Based on Muti-Agent for Papermaking Drying Process.

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