Engineering Commons^™

Biocide Dosing Strategies For Biofilm Control, D. M. Grant , T. R. Bott

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

In order to reduce environmental impact of biocide use for the control of biofilm formation in cooling water circuits, “environmentally friendly” biocides have been developed, but they are generally more expensive than the more traditional chemicals. It is imperative therefore, that the minimum quantity of biocide is employed, so that costs are kept to a minimum. To achieve this objective optimum dosing strategies are required. Using apilot plant in conjunction with a monoculture of Pseudomonas fluorecsens as the biofouling bacterium, tests were carried out using a proprietary biocide, to investigate the effects of dose concentration, duration and frequency of dosing …

Development Of A Data-Based Method For Performance Monitoring Of Heat Exchangers, A. Sawyer, A. E. Ruggles, B. R. Upadhyaya, E. Eryurek, K. Kavaklioglu, J. Miller

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

A multivariate analysis method is developed for processing measurements, and for detecting and isolating faults and monitoring performance degradation in heat exchanger control loops. A heat exchanger inside a typical temperature to flow cascade loop is considered. This system includes a constant speed pump with flow control valves, pressure and temperature measurement. A proportional-integral-differential (PID) controller is used to maintain a temperature set point for the exit flow on one side of the exchanger. A thermal-fluid model for the components in the system is developed. A Fault Detection and Isolation (FDI) rule-base is formulated from results of simulations performed using …

Table Of Contents, The Editors

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

No abstract provided.

Bayer Process Heat Exchangers Cleaning Efficiency: Optimizing The Acid Dissolution Of Sodalite Scale, Sébastien Fortin , Raymond Breault

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

Aluminum metal is produced by the electrolytic reduction of aluminum oxide (Al₂O₃), mainly extracted from bauxite ore digested in a hot caustic soda solution. This solution is supersaturated with respect to sodium aluminate and silicate, which react together to form sodalite (3[Na₂O·Al₂O₃·2SiO₂ ·2H₂O] ·Na₂CO₃) at high temperatures. Heat exchanger tubes are scaled with this compound, which seriously reduces heat transfer coefficient, thus increasing energy costs.

Heat exchanger tubes are cleaned periodically with a sulfuric acid solution that contains a corrosion inhibitor. An investigation …

Fouling And Cleaning Of Modified Stainless Steel Plate Heat Exchangers Processing Milk Products, M. Beuf, G. Rizzo, J. C. Leuliet, H. Müller-Steinhagen, S. Yiantsios, A. Karabelas, T. Benezech

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

Fouling of heat exchangers in dairy industries is still quite a severe problem both technically and economically. Altering the surface properties of the heating surfaces would be a way of solving this issue.

Modified steel surfaces were tested in an Alfa Laval V2 plate heat exchanger throughout dairy product sterilization. The behavior was analyzed for 8 different surface treatments, such as coatings (Diamond Like Carbon [DLC], Silica, SiO_X, Ni-P-PTFE, Excalibur^®, Xylan^®) and ion implantation (SiF+, MoS₂).

All fouling and cleaning experiments were carried out in standard and well-controlled operating conditions. After fouling, …

Analysis Of Fouling Data Based On Prior Knowledge, M. R. Malayeri , H. Müller-Steinhagen

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

Conventional regression methods are generally unable to analyse extremely complicated processes involving a considerable number of independent variables with poorly understood interaction. These methods use a defined equation for which the parameters of this equation have to be determined. It is however questionable whether any arbitrarily chosen equation is the best. This study aims to implement the powerful neural network architecture for a comprehensive data bank. The HTRI data bank contains a large and unique set of experimental data for cooling water fouling. Only a selection of the data bank is being used at the present time, due to the …

Comparison Of Crude Oil Fouling Using Two Different Probes, A. P. Watkinson

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

A variety of different fouling rigs, each with its own advantages and disadvantages is available to assess crude oil fouling. In this research, fouling of three crude oils are compared, using two electrically heated annular probes with strikingly different modes of operation. The Hot Liquid Process Simulator (HLPS) was operated in single-pass mode, under creeping flow conditions for time durations of a few hours at constant surface temperature. The Portable Fouling Research Unit (PFRU) was operated at velocities a factor of 250 higher, and followed the fouling process over two or more days at constant heat flux, using re-circulation of …

Improvements And New Developments In Self-Cleaning Heat Transfer Leading To New Applications , Dick G. Klaren

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

Improvements in the design have made the fluidized bed heat exchanger better suitable for the revamp of existing vertical severely fouling heat exchangers in evaporators, crystallizers and reboilers into a self-cleaning configuration. Highly viscous non-Newtonian slurries used in mineral processing can benefit from the fluidized bed heat exchanger not only due to its self-cleaning performance, but also as a result of the shear-thinning action of the fluidized particles which dramatically lowers the viscosity of the slurry. New developments have created the possibility to design compact self-cleaning fluidized bed heat exchangers which can compete with plate and frame exchangers.

An Effective Cip Procedure For Removing Dairy Protein Based Deposit – A Laboratory Investigation, Xiao Dong Chen, Necati Özkan, Frank Qin, Hong Xin, Lin Lin

Heat Exchanger Fouling and Cleaning: Fundamentals and Applications

In this paper, examples of using an in-situ electrochemical cleaning technique are illustrated. It can be shown that while using the standard chemical for cleaning in the dairy industry, the application of the in-situ electrochemical method is very effective in removing the dairy protein based fouling deposits. Both the gel protocol developed earlier and the real fouling procedure have been used to evaluate the effectiveness of the new method.

Undergraduate Engineers Get Credit For Saving Venice, Fabio Carrera, David Dibiasio, Natalie A. Mello

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Global Engineering Education Exchange (Global E3), Lester Gerhardt

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Impact Of The Sorbonne-Bologna Process On Engineering In Europe, Torbjörn Hedberg

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

When some 30 European ministers of Education signed a common declaration in Bologna in June 1999 they initiated a process that will lead to fundamental changes in the architecture of European higher education. The stated goals are to create a European Area of Higher Education characterised by improved mobility, international competitiveness and readable and comparable degrees. Some see the declaration as an effort to bring European education closer to an Anglo-Saxon model. This paper analyses some possible consequences for Engineering Education in particular and gives a description of how different European states have interpreted and implemented the principles of the …

Assessing The Value Of The International Experience, Bethany S. Oberst

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

The German Initiative For Students In Science And Technology, Heide Naderer

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Enhancement Of The Global Perspective For Engineering Students By Providing An International Experience: An Academic View - Europe, Claudio Borri, Elisa Guberti

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Table Of Contents, The Editors

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Barriers To Students Gaining An International Experience - Summary Of Group Discussion, Carl J. Mchargue, Eleanor Baum

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Appendix 1: Participants List, The Editors

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Student Exchange In Japan: Why And How To Provide Engineering Students With An International Experience, Itsuo Ohnaka

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Providing Central And East European Engineering Students With International Experience, Radu Chisleag

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

Historically, the academic life in Romania as well as in the other Central and East European countries had strong connections with Western Europe and some connections with the rest of the world. These connections were almost entirely forbidden by the communist soviet type political power imposed to these countries, following the Second World War. The 1989 anticommunist revolution in Central and East Europe opened the way for re-establishing contacts with the western World, offering Romanians and particularly to the students of the "POLITEHNICA" University in Bucharest, opportunities to get International Experience. Due, mainly, to the activity of some promoters, without …

The International Master Of Science In Aerospace Engineering Program, Ivan A. Camelier

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Models Of European Double And Joint Degrees: A Need For Transparency, Giancarlo Spinelli

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

The International Dimension Through Student Mobility, B. E. Mulhall

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Preparing Engineering Students For The New Business Paradigm Of International Teamwork And Global Orientation, Keith Sheppard, Peter Dominick, Zvi Aronson

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Need For Global Perspective: An Industrial View, Kruno Hernaut

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Monterrey Tech's International Strategy, Teofilo Ramos, Enrique Zepeda

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Georgia Tech's Strategies For Global Engineers, Jack R. Lohmann

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

International Accreditation Activities, Alfredo Soeiro

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Issue Of Quality In Nigeria Education System, C. N. Achi

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.

Foreword, The Editors

Enhancement of the Global Perspective for Engineering Students by Providing an International Experience

No abstract provided.