Applied sciences

Chemical and Process Engineering

Content

Chemical and Process Engineering | 2011 | No 1 March |

Abstract

General principles of mathematical modelling of transient heat transfer in cross-flow tube heat exchangers with complex flow arrangements which allow a simulation of multipass heat exchangers with many tube rows are presented. First, a system of differential equations for the transient temperature of both fluids and the tube wall with appropriate boundary and initial conditions is formulated. Two methods for modelling heat exchangers are developed using the finite difference method and finite volume method. A numerical model of multipass steam superheater with twelve passes is presented. The calculation results are compared with the experimental data.

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Abstract

The purpose of the study was to analyse the effect of changes in the composition of raw material and agglomeration on sorption properties of a multi-component food, in the example of a powdered cocoa beverage. The basic composition of the mixtures was 20% of cocoa and 80% of sucrose. A change in raw material composition involved partial or total replacement of sucrose with a mixture of glucose and fructose, or with maltodextrin. Analysis of sorption properties demonstrated variability in the course of isotherms of water vapour sorption for components of the powdered cocoa beverage. Limiting water activity (aw) was determined for the value of 0.529. The conducted analysis detected no significant effect of agglomeration on water content in the tested products. However, a significant change in the raw material composition was demonstrated.

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Abstract

The aim of the project was to collect experimental data regarding local distributions of fluid velocity and inert tracer concentration in a tank reactor with turbulent flow. The experiments were performed in a microscale in a region of tracer fluid injection. The results of experiments can be used for direct validation of currently developed CFD models, particularly for time-dependent mixing models used in LES.

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Abstract

CO, NO, NO2 and dust concentrations from combustion of deciduous wood (birch, beech, lime-tree) logs and pellets in two heating boilers (15 and 25 KW), situated in a heat station were investigated. Time dependences of pollutant concentrations as well as the impact of temperature in the combustion chamber and oxygen concentration on pollutant concentrations were presented. Pollutant emission indices have been estimated.

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Abstract

The aim of this work was to determine the influence of liming on the process of pyrolysis. Three samples of sludge from two wastewater treatment plants were selected for this study on pyrolysis: sludge without liming and limed sludge from the Central Wastewater Treatment Plant in Ostrava and sludge from the Wastewater Treatment Plant in Sviadnov. The samples had different content of calcite (CaCO3). The limed sludge contained 7% of CaCO3, sludge without liming 3.8% and sludge without liming from WWTP Sviadnov contained 0.5% of calcite. The results of laboratory pyrolysis proved that limed sludge released the maximum amount of carbon - 55.46 %, while sludge without liming from WWTP Sviadnov released only 48.92%. Calcite produces during its decomposition CaO and the product influences the pyrolysis process because it supports cracking of volatile organic compounds

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Editorial office

Editor-in-Chief
Andrzej K. Biń, Warsaw University of Technology, Poland

Editorial Board
Andrzej Burghardt (Chairman), Polish Academy of Sciences, Gliwice, Poland
Jerzy Bałdyga, Warsaw University of Technology, Poland
Andrzej Górak, T.U. Dortmund, Germany
Leon Gradoń, Warsaw University of Technology, Poland
Andrzej Jarzębski, Silesian University of Technology, Poland
Zdzisław Jaworski, West Pomeranian University of Technology, Szczecin, Poland
Władysław Kamiński, Technical University of Łódź, Poland
Stefan Kowalski, Poznań University of Technology, Poland
Andrzej Krasławski, Lappeenranta University of Technology, Finland
Stanisław Ledakowicz, Technical University of Łódź, Poland
Eugeniusz Molga, Warsaw University of Technology, Poland
Alvin W. Nienow, University of Birmingham, United Kingdom
Andrzej Noworyta, Wrocław University of Technology, Poland
Ryszard Pohorecki, Warsaw University of Technology, Poland
Andrzej Stankiewicz, Delft University of Technology, The Netherlands
Czesław Strumiłło, Technical University of Łódź, Poland
Stanisław Sieniutycz, Warsaw University of Technology, Poland
Krzysztof Warmuziński, Polish Academy of Sciences, Gliwice, Poland
Laurence R. Weatherley, University of Kansas, Lawrence, United States
Günter Wozny, T.U. Berlin, Germany
Ireneusz Zbiciński, Technical University of Łódź, Poland

Technical Editor
Barbara Zakrzewska, West Pomeranian University of Technology, Szczecin, Poland
Language Editor
Marek Stelmaszczyk, West Pomeranian University of Technology, Szczecin, Poland

 

Contact

Editorial Office
ul. Waryńskiego 1
00-645 Warszawa
Poland
email: andrzej.bin@outlook.com

 

Instructions for authors

All manuscripts submitted for publication in Chemical and Process Engineering must comprise a description of original research that has neither been published nor submitted for publication elsewhere.

The content, aim and scope of the proposals should comply with the main subject of the journal, i.e. they should deal with mathematical modelling and/or experimental investigations on momentum, heat and mass transfer, unit processes and operations, integrated processes, biochemical engineering, statics and kinetics of chemical reactions. The experiments and modelling may cover different scales and processes ranging from the molecular phenomena up to production systems. The journal language is grammatically correct British English.

Chemical and Process Engineering publishes: i) full text research articles, ii) invited reviews, iii) letters to the editor and iv) short communications, aiming at important new results and/or applications. Each of the publication form is peer-reviewed by at least two independent referees.  

Submission of materials for publication

The manuscripts are submitted for publication via Internet site www.chpe.pl and its subfolder Authors Pathway or e-mail address andrzej.bin@outlook.com. When writing the manuscript, authors should preferably use the template for articles, which is available on the www.chpe.pl page in section Instructions for Authors.   

Proposals of a paper should be uploaded using the Internet site of the journal and should contain:

  • a manuscript file in Word format (*.doc, *.docx),
  • the manuscript mirror in PDF format,
  • all graphical figuresin separate graphics files.

In the following paragraphthe general guidelines for the manuscript preparation are presented.

Manuscript outline

        1. Header details
          1. Title of paper
          2. Names (first name and further initials) and surnames of authors
          3. Institution(s) (affiliation)
          4. Address(es) of authors
          5. Information about the corresponding author; academic title, name and surname, email address, address for correspondence
        2. Abstract – should contain a short summary of the proposed paper. In the maximum of 200 words the authors should present the main assumptions, results and conclusions drawn from the presented study.
        3. Keywords– Up to 5 characteristic keyword items should be provided.
        4. Text
          1. Introduction. In this part, description of motivation for the study and formulation of the scientific problem should be included and supported by a concise review of recent literature.
          2. Main text. It should contain all important elements of the scientific investigations, such as presentation of experimental rigs, mathematical models, results and their discussion. This part may be divided into subchapters.
          3. Conclusions. The major conclusions can be put forward in concise style in a separate chapter. Presentation of conclusions from the reported research work accompanied by a short commentary is also acceptable.
          4. Figures: drawings, diagrams and photographs can be in colour and should be located in appropriate places in the manuscript text according to the template provided on the www.chpe.pl page. Their graphical form should be of vector or raster type with the minimum resolution of 900 dpi. In addition, separate files containing each of the drawings, graphs and photos should be uploaded onto the journal Web site in one of the following formats: bmp, gif, tiff, jpg, eps. Due to rigid editorial reasons, graphical elements created within MS Word and Excel are not acceptable. The final length of figures should be intended typically for 8 cm (single column) or 16 cm in special cases of rich-detail figures. The basic font size of letters in figures should be at least 10 pts after adjusting graphs to the final length.  

          Figures: drawings, diagrams and photographs should be in gray scale. In case of coloured graphs or photo an additional payment of 300 PLN (72 €) per 1 page containing coloured figures on both sides, or 150 PLN (36 €) per page containing coloured figures on one side will be required.

          Tables should be made according to the format shown in the template.

        5. All figures and tables should be numbered and provided with appropriate title and legend, if necessary. They have to be properly referenced to and commented in the text of the manuscript.

        6. List of symbols should be accompanied by their units
        7. Acknowledgements may be included before the list of literature references
        8. Literature citations

 

The method of quoting literature source in the manuscript depends on the number of its authors:

  • single author – their surname and year of publication should be given, e.g. Marquardt (1996) or (Marquardt, 1996),
  • two authors – the two surnames separated by the conjunction “and” with the publication year should be given, e.g. Charpentier and McKenna (2004) or (Charpentier and McKenna, 2004),
  • three and more authors – the surname of the first author followed by the abbreviation “et al.” and year of publication should be given, e.g. Bird et al. (1960) or (Bird et al., 1960).

In the case of citing more sources in one bracket, they should be listed in alphabetical order using semicolon for separation, e.g. (Bird et al., 1960; Charpentier and McKenna, 2004; Marquardt, 1996). Should more citations of the same author(s) and year appear in the manuscript then letters “a, b, c, ...” should be successively applied after the publication year.

Bibliographic data of the quoted literature should be arranged at the end of the manuscript text in alphabetic order of surnames of the first author. It is obligatory to indicate the DOI number of those literature items, which have the numbers already assigned. Journal titles should be specified by typingtheir right abbreviationsor, in case of doubts, according to the List of Title Word Abbreviations available at http://www.issn.org/2-22661-LTWA-online.php.

Examples of citation for:

Articles
Charpentier J. C., McKenna T. F., 2004.Managing complex systems: some trends for the future of chemical and process engineering. Chem. Eng. Sci., 59, 1617-1640. DOI: 10.1016/j.ces.2004.01.044.

Information from books (we suggest adding the page numbers where the quoted information can be found)
Bird R. B., Stewart W.E., Lightfood E.N., 2002. Transport Phenomena. 2nd edition, Wiley, New York, 415-421.

Chapters in books
Hanjalić K., Jakirlić S., 2002. Second-moment turbulence closure modelling, In: Launder B.E., Sandham N.D. (Eds.), Closure strategies for turbulent and transitional flows. Cambridge University Press, Cambridge, 47-101.

Conferences
ten Cate A., Bermingham S.K., Derksen J.J., Kramer H.M.J., 2000. Compartmental modeling of an 1100L DTB crystallizer based on Large Eddy flow simulation. 10th European Conference on Mixing. Delft, the Netherlands, 2-5 July 2000, 255-264.

8. Payments

Starting from 2014 a principle of publishing articles against payment is introduced, assuming non-profit making editorial office. According to the principle authors or institutions employing them, will have to cover the expenses amounting to 40 PLN (or 10 €) per printed page. The above amount will be used to supplement the limited financial means received from the Polish Academy of Sciences for the editorial and publishing; and in particular to increase the capacity of the next CPE volumes and to proofread the linguistic correctness of the articles. The method of payment will be indicated in an invoice sent to the authors or institutions after acceptance of their manuscripts to be published. In justifiable cases presented in writing, the editorial staff may decide to relieve authors from basic payment, either partially or fully. All correspondence should be sent to Editor-in-Chief, Prof. Andrzej K. Biń, email address: andrzej.bin@outlook.com.


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