Drying-Plant for smoked meat products

Tato práce je věnována základním požadavkům technologie sušení a zrání masných výrobků ve zracích komorách. Bude zmíněno základní rozdělení salámů a z toho plynoucí parametry pro zrací komory a jak ovlivňuje hygiena a sanitace celkovou produktivitu. Podrobně bude popsána technologie sušení. Stručně bude popsána fermentace a zrání jako takové.The thesis deals with essential requirements to dry and cure meat products using drying chambers. It covers the basic salami classification, the relevant parameters applicable to the drying chambers as well as the hygiene and sanitation and their influence on productivity. The drying technology is particularly emphasized. Brief information is provided regarding the fermentation and curing processes.

The energy consumption optimization of the BLAS routines

The paper deals with the energy consumption evaluation of selected Sparse and Dense BLAS Level 1, 2 and 3 routines. Authors employed AXPY, Sparse Matrix-Vector, Sparse Matrix-Matrix, Dense Matrix-Vector, Dense Matrix-Matrix and Sparse Matrix-Dense Matrix multiplication routines from Intel Math Kernel Library (MKL). The measured characteristics illustrate the different energy consumption of BLAS routines, as some operations are memory-bounded and others are compute-bounded. Based on their recommendations one can explore dynamic frequency switching to achieve significant energy savings up to 23%

Глобализация, региональная интеграция и экономическое развитие

The paper deals with the energy consumption evaluation of the Finite Element Tearing and Interconnect (FETI) based solvers of linear systems, which is an established method for solving real-world engineering problems. Authors evaluated the effect of the CPU frequency on the energy consumption of the FETI solver using a linear elasticity 3D cube synthetic benchmark. In this problem, the effect of frequency tuning on the energy consumption of the essential processing kernels of the FETI method was evaluated. The paper provides results for two types of frequency tuning: (1) static tuning and (2) dynamic tuning. For static tuning experiments, the frequency is set before execution and kept constant during the runtime. For dynamic tuning, the frequency is changed during the program execution to adapt the system to the actual needs of the application. The paper shows that static tuning brings up 12% energy savings when compared to default CPU settings (the highest clock rate). The dynamic tuning improves this further by up to 3%

On isotactic polypropylene annealing: Difference in final properties of neat and β-nucleated polypropylene

The effect of isotactic polypropylene (iPP) molecular weight and thermal treatment on final crystalline structure and mechanical properties were investigated by X-ray scattering, differential scanning calorimetry, tensile testing, and scanning electron microscopy. Neat and β-nucleated isotactic polypropylene were subjected to annealing above melting temperature of β-phase but still below melting temperature of α-phase, which caused both improvement of α crystallites and β to α-recrystallization, in case of nucleated material. As a consequence, the final mechanical properties like tensile strength and stiffness improved significantly. The increase is much more pronounced in the case of β to α-transformed materials with lower molecular weight. This phenomenon can also be attributed to the partial preservation of the specific structure of the amorphous phase present in β-nucleated polypropylene, in addition to the perfection of the crystalline phase. The amorphous phase comprises many interconnecting chains passing through several lamellae whereby providing a long-range effect. © BME-PT.CZ.02.2.69/0.0/0.0/16_027/0008464, IGA/FT/2020/011, IGA/UTB/FT/2021/007; European Commission, ECEuropean UnionEuropean Commission [CZ.02.2.69/0.0/0.0/16_027/0008464, IGA/FT/2020/011, IGA/UTB/FT/2021/007

Desing of a processing chamber for smoked goods production

Cílem diplomové práce je navrhnout klimatizační komoru pro sušení uzenin. Samotné konstrukci předchází rozbor problematiky sušení a zrání. Navržená konstrukce zrací komory sestává z nosné konstrukce, nerezové komory, pojezdového rámu, hnacího ustrojí a rozvodu vzduchu s jeho úpravou. Jsou zde vypočteny parametry vzduchu pro všechny stavy během vlhčení vzduchu v komoře, odvlhčování v chladiči a ohřevu. Práce také obsahuje schéma regulace se stručným popisem její funkce.The aim of the diploma thesis is to design a drying chamber for meat/salami processing. The design itself comes after the necessary information regarding meat drying and curing has been given. The chamber comprises a main frame, stainless steel chamber, chain conveyor, powertrain and a ductwork for the air treatment. All the parameters of moist air are given as calculated for the states encountered during the drying process, i.e. air dehumidification, when passing the cooling coil, and heating. The control system to meet the required environment condition is also suggested.

Photodegradation of Polypropylene with sorbitol-based nucleating agent

The paper deals with the effects of nucleation on photodegradation of isotactic polypropylene. The starting polymer was modified by a specific alpha-nucleating/clarifying agent Millad 3988 based on 1,3;2,4-bis(3,4-dimethylbenzylidene) sorbitol. Several concentrations were applied. Samples prepared by compression moulding were then exposed to UV-irradiation. Infrared spectroscopy showed that the degradation kinetics is similar for all the samples. Melting and crystallization behaviour of irradiated samples was followed using a differential scanning calorimetry. In all cases UV-irradiation led to decrease of melting/crystallization temperature as a result of polymer degradation. The surface cracking was observed using polarized light microscopy. The network of the surface cracking was significantly different for neat and nucleated samples

Structure of high-pressure crystallized poly(1-butene)

Present work study the effect of high-pressure crystallization on morphology and thermal behavior of two different homopolymers of isotactic poly(1-butene). Both materials were non-isothermally crystallized under pressure in range from 20 to 200 MPa using a pvT100 apparatus and thus prepared samples were investigated using wide-angle X-Ray scattering, differential scanning calorimetry and polarized light microscopy. Results showed significant effect of pressure on formation of metastable phases I' and II with respect to material properties on thermal behavior and morphology in isotactic poly(1-butene)

Influence of high pressure on thermal behavior of poly(1-butene) homopolymers

Present work study the effect of high-pressure crystallization on morphology and thermal behavior of two different homopolymers of isotactic poly(1-butene). Both materials were non-isothermally crystallized under pressure in range from 20 to 200 MPa using a pvT 100 apparatus and thus prepared samples were investigated using differential scanning calorimetry and polarized light microscopy. Results showed significant effect of pressure on formation of metastable phases I' and II with respect to material properties on thermal behavior and morphology in isotactic poly(1-butene).European Social Fund (ESF); national budget of the Czech Republic, within the project 'Advanced Theoretical and Experimental Studies of Polymer Systems' [CZ. 1.07/2.3.00/20.0104]; 'Research and Development for Innovations' Operational Programme - European Regional Development Fund (ERDF); national budget of the Czech Republic, within the project entitled 'Centre of Polymer Systems' [CZ. 1.05/2.1.00/03.0111]; TBU in Zlin [IGA/FT/2012/040

High-pressure crystallization of poly(1-butene)

This work study influence of high-pressure crystallization on two homopolymers of poly(1-butene) (PB-1). Samples were non-isothermally crystalized under pressure range from 20 to 200MPa using a pvT 100 device. Obtained specimens were analyzed by using wide-angle X-Ray scattering (WAXS), differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Significant impact of the pressure of crystallization on the phase I' and phase I appearance was observed

Thermal-induced transformation of mechanical properties of polybutene-1

The work directs attention towards the influence of annealing temperature on transformation of polymorphic composition and mechanical properties of isotactic polybutene-1 (PB-1). For these purposes, three different commercial-available grades of PB-1 were chosen. Specimens prepared by injection molding were annealed at given temperature (-22, +6, +22, +40 and +60°C) in the interval from 0 to 48 days. The changes in structure and properties were followed by tensile testing. A nonmonotonic evolution of tensile properties was observed