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AVAILABLE AND EMERGING TECHNOLOGIES FOR .

efficiency and effectiveness of the sulfite process is also dependent on the type of wood furnish and the absence of bark. For these reasons, the use of sulfite pulping has declined in comparison

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(PDF) Exergy, power and work in the US economy, 1900–1998 ...

For instance, if a stationary steam engine for a factory with machines operating off belt drives c. 1900 had a thermal efficiency of 6%, with 50% frictional losses, the net exergy efficiency was 3% [Dewhurst et al 1955 Appendices 25-3,25-4 cited in Schurr et al footnote 19, p. 55].

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Thermodynamic simulation of dryer section heat recovery in ...

Modern paper machines are equipped with heat recovery systems that are able to recover over 50% of the energy used by the paper machine. The recovered heat is used for the heating of dryer section supply air, process water and machine hall ventilation. Today, the structure of new heat recovery installations is optimised with sophisticated algorithms to match the design point of the paper machine.

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Process Parameters Optimization for Energy Saving in Paper ...

In order to improve the energy efficiency of the paper machine dryer section, deeper analysis and optimization of process parameters are necessary. A NLP optimization method is developed for integration of steam system and air system to reduce the steam consumption and decrease the loads of centrifugal blowers in the multicylinder dryer section ...

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ENERGY AND EXERGY ANALYSIS OF DIESEL ENGINE IN .

In each diesel machine V-type 18 cylinder is located. Thermal efficiency in a standard medium speed diesel engine is between 0.37 – 0.43. . Keywords: energy, exergy analysis, exergy efficiency, thermal power plant. 1. INTRODUCTION Engineers and scientists have been using enthalpy balances for more than a century to

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Trends in Austrian Resource Efficiency: An Exergy and ...

The improvement in the efficiency with which fuel exergy is converted into useful work by machines has far exceeded the conversion efficiency within human bodies. A major trend is the electrification of the economy, with 45% (99 PJ) of all useful work supplied in 2012 by electrical devices.

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AVAILABLE AND EMERGING TECHNOLOGIES FOR .

efficiency and effectiveness of the sulfite process is also dependent on the type of wood furnish and the absence of bark. For these reasons, the use of sulfite pulping has declined in comparison

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Exergetic analysis of a continuous Bi-axially Oriented ...

By using exergy analysis method, the magnitudes and locations of exergy destructions (irreversibilities) in the whole system are identified, while potential for energy efficiency improvements is introduced (Hancioglu and Hepbasli, 2007). In the literature, numerous studies on energy and exergy .

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Modeling and Control of the Paper Machine Drying Section ...

machine – the drying section. Paper is dried by letting it pass through a series of steam heated cylinders and the evaporation is thus powered by the latent heat of vaporization of the steam. The moisture in the paper is controlled by adjusting the set point of the steam pressure controllers.

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Steam & Condensate System Improvements

Aug 17, 2012· All pulp, paper, board and the majority of tissue machines have steam and condensate systems. The objective of the steam and condensate system in the paper machine is to provide the steam for the drying. In the dryer section the moisture is evaporated as the sheet is pressed between a fabric and the hot drying cylinder.

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Energy and Productivity Yield Assessment of a Traditional ...

The following indices were obtained from the experimental runs: energy efficiency 12.726 ± 1.091%, exergy efficiency 9.013 ± 0.710%, energy losses through chimney 72.293 ± 11.507%, yield 0.144 ± 0.021 kg panela /kg bagasse, productivity 7.450 ± 0.520 kg panela /h, and bagasse consumption 1.258 ± 0.139 kg bagasse consumed /kg bagasse ...

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High Efficiency Paper Machine Dryer Section - Beston Group

Compared with outdated drying ways, the dryer cylinder paper machine of our factory successfully reduce 2/3 drying time and promote 90% quality. The machine can save energy, production time and cost. In order to provide higher performance paper making equipment, we put a large amount of time, resources, researchers, money into the research and ...

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International Journal of Exergy (IJEX) Inderscience ...

The results showed that the optimized exergy efficiency of the LNG cold energy full power utilization system proposed in this paper reaches 54.69%, which has the best cold energy utilization efficiency; and the optimized LNG cold energy cascade comprehensive utilization system scheme has the optimized exergy efficiency as 50.13%, but it has the ...

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Dryer section control in paper machines during web breaks ...

Web breaks in the dryer section of a paper machine cause loss of production and quality problems. After a web break, the steam pressure in the cylinders must be reduced to avoid overheating. The goal of this project is to determine optimal steam pressure trajectories during web breaks, so that the production is restarted with the same drying properties of the cylinder as before the break.

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Paper machine dryer sections

impingement drying OptiDry Vertical is Paper's new impingement drying concept that provides excellent drying efficiency and runnability. When building a new machine, it is possible to shorten the paper machine hall to approximately half the length of a cylinder dryer section. This allows major savings in investment costs. 80730 40830

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Improved Energy Efficiency in Paper Making Through ...

results of a survey undertaken in the Finnish paper industry in 1995, in which energy use figures are presented over a range of paper making categories. Finnish energy use is reported to lie in the range 2 MWhr/t to 3 MWhr/t. 1.1 Paper Drying Uses Most of Paper Making Energy to Remove Less than the Last 1% of Sheet Moisture

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Exergy Performance of Vortex Tube by Varying Geometrical ...

outlet exergy, total lost exergy and exergy efficiency have been reported. It was found that the exergy efficiency of various nozzle cross section areas for particular vortex tube design ranges from 1% to 39%. Mohammad O. Hamdan, et al. [6] This paper reveals the effect of nozzle parameters on performance of vortex tube.

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Voith realizes ropeless threading for board machines in ...

HEIDENHEIM, GERMANY. In board machines, threading the paper web following shutdowns or breaks in the dryer section has until now been a complicated and time-consuming process. The process of using ropes to guide the tail through the dryer section presents safety risks and involves an extensive maintenance effort. A new Voith solution offers paper manufacturers unprecedented flexibility and ...

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An Experimental Investigation of Performance and Exergy ...

Sep 17, 2010· An experimental investigation has been carried out to determine the thermal behavior of cooling fluid as it passes through a vortex tube and the effects of the orifice nozzle number and the inlet pressure on the heating and cooling performance of the counterflow type vortex tube (RHVT).

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Non-contact drying and web guiding

energy efficiency are also an important approach to achieving cost savings in paper production. Comparison of energy efficiency Infrared drying 50 – 55 Air drying 55 – 70 0 25 50 75 Gas Gas Gas Achievable system efficiency in % (depending on operating conditions and configuration). Former combined systems 55 – 65 Gas qDry Pro 65 – 75

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CleanLine | Voith

Higher added value is achieved through individually matched product combinations that maximize the performance of your paper machine. For example, the effects of contamination are significantly reduced in the dryer section with CleanLine Extract4D, CleanWeave dryer fabrics, ProRelease + web stabilizer, and TerraDry roll covers. Together, these ...

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Full article: Drying of paper: A review 2000–2018

Apr 04, 2019· Introduction. Worldwide about 410 million tons of paper were produced 2016 [] and notwithstanding the internet era is still increasing year by year. Drying of the paper (printing paper, board, and tissue) is a major step on the paper producing machine requiring large amounts of energy and setting high demands on the quality for the produced paper grades.

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Exergy Performance of Vortex Tube by Varying Geometrical ...

outlet exergy, total lost exergy and exergy efficiency have been reported. It was found that the exergy efficiency of various nozzle cross section areas for particular vortex tube design ranges from 1% to 39%. Mohammad O. Hamdan, et al. [6] This paper reveals the effect of nozzle parameters on performance of vortex tube.

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Energy efficiency improvement of dryer section heat ...

Energy efficiency improvement of dryer section heat recovery systems in paper machines – A case study. Applied ... exhaust air of the paper machine's dryer section to different process streams. As a result of process ... methods have been developed based on exergy [24–27] and ad-vanced composite curves [28–30]. ...

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EUROPA - Energy Efficiency in the Pulp and Paper Industry ...

The most efficient 10 % of (wood-free) paper machines account for roughly 40 % of total production. In 2012, 3.9 Mt of pulp was exported to non-CEPI countries and 7.8 Mt of pulp was imported. Paper exports and imports in 2012 amounted to 19.9 Mt and 5.2 Mt respectively. For further information: Technology_Map_2011.pdf

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Energy Optimization in the Dryer Section - pulp and paper ...

in the Dryer Section A t today's high cost of energy, optimizing the paper machine dryer section offers one of the greatest returns on capital. More than 75% of the electrical and steam usage by a paper machine is consumed in the drying section. Monitoring, evaluating and controlling this section of both old and new paper machines is imperative.

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Optimization of water removal in the press section of a ...

Abstract. An optimization problem regarding water removal in the press section of a paper machine is considered in this work. The proposed model tries to minimize a cost function comprising the replacement of the felts in the press section, the cost of energy to operate the press and the cost of energy in the drying section, while satisfying the constraints of water mass balance in the process.

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EXERGY, POWER AND WORK IN THE US ECONOMY, 1900 .

It is usual to define several kinds of exergy, including mechanical exergy, thermal exergy and chemical exergy [Szargut et al 1988]. The first two are more familiarly known as kinetic energy and heat, respectively. They are of interest mainly in mechanical engineering (e.g. machine design). The third is of interest in chemical

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Toscotec | Products - Tissue Machines: AHEAD Line: Toscotec

Its drying section completely relies on steam energy to deliver superior results in production efficiency and tissue quality. ... Paper machine press section represent a key area for rebuilds to improve quality of the paper and energy savings. ... The perfect tool for new machines or to improve the efficiency and safety of an existing line.

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Gas IR Paper Drying | GasPaperDryer

Drying is an energy intensive operation, accounting for 35% of the steam energy requirements of an integrated paper mill. Drying capacity is a function of the number of steam drums in the line. As lines have been made to run faster, often additional steam drums are required.

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(PDF) An application of energy and exergy analysis in ...

Energy and exergy analysis 0 4 8 12 16 20 In this section, we combined the overall energy and exergy Exergy efficiency of the fuels (%) efficiencies of Agriculture sector in Malaysia. In this regard, the Fig. 3.

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Energy demand and efficiency measures in polymer ...

Jan 29, 2016· Energy efficiency is defined as the ratio between energy consumption and the use of the energy in a system . Energy demand is a key dimension for the evaluation of the energy efficiency in production. Given different usable energy (exergy) forms, a direct comparison of different energy forms like thermal or mechanical energy is not possible.

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