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1. chinaXiv:201711.00017 [pdf]

Mathematical Modelling of the Transient Response of Pipeline

Taler, D. ; Kaczmarski, K.
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

The development of heat recovery methods for dry granulation processes from blast furnace slag in the iron and steel industry is limited because of the high consumption of granulation energy during these processes. To determine the factors that influence the diameter of granulated particles, a paraffin test platform for gas quenching granulation was established. The influences of air velocity, air flow rate, liquid mass flow rate, and liquid pipe diameter on the final particle size and mass distribution were studied. Experimental results showed that the final particle size decreased (from 1.07 mm to 0.81 mm) with increasing air velocity (from 28.3 m/s to 113.2 m/s). However, when air velocity was higher than 60 m/s, its influence on particle diameter decreased significantly. The experimental data were analyzed using SPSS Statistics software, which indicated that the effect of air velocity on particle diameter was the most significant, followed by those of air flow and liquid pipe diameter. The effect of liquid mass flow was the least significant.

submitted time 2017-11-02 From cooperative journals:《热科学学报》 Hits20301Downloads535 Comment 0

2. chinaXiv:201711.00039 [pdf]

Optimum Heating of Thick-Walled Pressure Components Assuming a Quasi-steady State of Temperature Distribution

Dzierwa, P.,; Trojan, M., ; Taler, D., ; Kaminska, K.; Taler, J.
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

As a result of the development of wind farms, the gas steam blocks, which shall quickly ensure energy supply in case the wind velocity is too low, are introduced to the energy system. To shorten the start-up time of the gas steam and conventional blocks, the structure of the basic components of the blocks are changed, e.g. by reducing the diameter of the boiler, the thickness of its wall is also reduced. The attempts were also made to revise the currently binding TRD 301 regulations, replacing them by the EN 12952-3 European Standard, to reduce the allowable heating and cooling rates of thick walled boiler components. The basic assumption, on which the boiler regulations allowing to calculate the allowable temperature change rates of pressure components were based, was the quasi - steady state of the temperature field in the simple shaped component, such as a slab, cylindrical or spherical wall.

submitted time 2017-11-02 From cooperative journals:《热科学学报》 Hits420Downloads247 Comment 0

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