Technical Transactions iss. 1. Mechanics iss. 1-M

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Collection items (25)


Development of a mobile pilot plant for the evaluation of novel scrubbing liquids for the absorption of CO2 from industrial gases

Wilhelm, Robert, Esche, Erik, Wozny, Günter, Repke, Jens-Uwe, Guetta, Zion, Thielert, Holger
Article
2016
Most available scrubbing liquids suffer from either high heating duties for the regeneration or vulnerability towards gas components. In order to increase the efficiency of the absorption process a novel scrubbing liquid has been developed by thyssenkrupp Industrial Solutions AG. For verifying relevance and feasibility of long-term operation of the new fluid assumptions for installation were created – conceptual design and detailed simulation of the process without detailed thermodynamic information.

A numerical model of transient pipeline operation

Taler, Dawid, Kaczmarski, Karol
Article
2016
The aim of this study is to develop a numerical model of a steam pipeline. The energy conservation equations for the pipeline wall and steam are solved using the finite volume method (FVM). The transient temperature of the pipeline wall, steam temperature and thermal stresses can be calculated using the model developed in the paper.

The concept of a quasi-micropolar fluid model

Szubartowski, Damian, Ganczarski, Artur
Article
2016
This paper presents a micropolar fluid model that direct applies Cosserat’s continuum to hydrodynamics. The corresponding system of equations describing isotropic micropolar fluid is obtained by assuming lack of symmetry of the Cauchy stress tensor and taking into account the conservation of angular momentum. This turns out to be an extension of the NavierStokes fluid but containing turbulent effect built in.

Analysis of pressure losses in the cross flow fan heat exchanger at various thermal and flow conditions

Stacharska-Targosz, Jolanta, Nering, Konrad
Article
2016
In this paper the analysis of performance characteristics of a cross flow fan working as an element of the unit incorporating heat exchanger as well as performance characteristics of the unit are presented. These experimental results were basic for consideration of pressure losses arising as an effect of direct connection of a cross flow fan and a heat exchanger located in the charging zone of the fan as a resistance. Analysis of an influence of rotational speed variation as well as a medium temperature on aerodynamic characteristics of heat exchanger let to propose a method for the local pressure loss estimation.

Automated membrane reactors for the early process development of enzyme promoted bioconversion

Sitanggang, Azis Boing, Drews, Anja, Kraume, Mathhias
Article
2016
In general, there is always a trade-off between the information output and the process throughput. The automation of micro- to small-scale bioreactors is considered necessary as this can facilitate a straightforward bioprocess development to reach its commercial success. A small-scale, dead-end enzymatic membrane reactor system has been realised. Reactor system was tested for the continuous transgalactosylation of lactulose using commercial βgalactosidase.

Numerical modelling of pulse wave propagation in the human thoracic aorta

Rup, Kazimierz, Dróżdż, Agata
Article
2016
In this paper, a solution to the numerical simulation of blood flow in the human thoracic aorta is presented. In vivo measurements of pulsewave waveforms were performed and used as the initial condition for numerical calculations. Equations resulting from the analysis of the general mass and momentum balance for blood flow were used for the description of aortal haemodynamics. The system of differential equations has been solved with the method of characteristics, which is often used in hydrodynamic problems. Numerical simulations were employed for the cases of three people of differing ages. As a result, time-dependent profiles of blood pressure and velocity as well as deformation of the arterial wall were determined.

The systematic design of CO2 capture rocesses applied to the oxidative coupling of methane

Penteado, Alberto, Esche, Erik, Salerno, Daniel, Godini, Hamid Reza, Repke, Jens-Uwe, Wozny, Günter
Article
2016
The oxidative coupling of methane is the catalytic conversion of methane into ethene. Carbon dioxide is generated as a reaction by-product and must be removed from the gaseous stream. In this paper, the application of a hybrid carbon dioxide removal process including absorption with amines and gas separation membranes is investigated through simulations and cost estimations.

Hybrid heating and cooling system with renewable energy sources

Pater, Sebastian, Magiera, Janusz, Ciesielczyk, Włodzimierz
Article
2016
This paper presents hybrid heating and cooling system with four heating devices, three of which are producing heat from renewable energy sources. The systems operate in real conditions in residential and commercial building near Cracow. Geothermal heat pumps have an additional working mode that can be used for passive cooling during summertime for the cooling of building interiors. Results from several years of installation operation with a particular emphasis upon performance, the consumption of electricity, and the amount of heating and cooling production achieved by the individual devices have been presented.

An evaluation of delamination in composite structures by Cooling Down Thermography (CDT): numerical studies

Pastuszak, Przemysław Daniel, Nering, Konrad
Article
2016
This paper is devoted to numerical studies of composite structures with delaminations made with the use of CDT. Analysis of temperature distribution provides the opportunity to determine the geometry of subsurface defects. Results confirm the validity of the FE model in comparison to previous experimental investigations.

Automotive catalyst production – challenges for chemical engineers

Netušil, Michal, Ditl, Pavel
Article
2016
The goal of this paper is to explain the chemical engineering backgrounds for operations participating on catalyst production in the automotive industry. It is shown that chemical engineering knowledge can help to a better understanding and optimisation of the production process. Besides the contribution mentioned above this paper brings the description of the up to date and interesting technology developed and patented by the worldwide leader in the chemical engineering - BASF. The car catalyst production process consists of two steps. Firstly, the coating slurry is produced and secondly, it is applied to the substrate. This paper focuses on the slurry production especially with regard to its dispersion, mixing, particle size reduction, and the influence of parameters affecting this process.