Systemic Cryotherapy Influence of Low Temperatures on Selected Physiological Parameters

2021

Materials

The unit pressure in the fine-grained material consolidation process in the roller press can reach over hundred MPa and is a parameter which results, among other things, from the properties of the consolidated material and the compaction unit geometry. Its value changes depending on the place on the molding surface. Generating different pressure on the surface of briquettes makes their compaction different. One’s own and other researchers’ experience shows that, in the case of exerting high pressure on the merged fine-grained material, the higher unit pressure exerted on the material, the higher temperature of the consolidated material is. The temperature distribution on the surface of the briquettes can testify the locally exerted pressure on the briquette. The stress distribution in the briquetting material is still a subject of research. The article includes thermography studies of the briquetting process of four material mixtures. Thermal images of briquettes were taken immediately after they left the compaction zone as well as forming rollers. The obtained thermograms and temperature variability at characteristic points of the surface of briquettes were analyzed. The correlation between the temperature distribution and the stress distribution in the briquettes was determined.

Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

Bembenek

2021

Materials

“…Thermography is currently perceived as one of the most interesting diagnostic-observation methods. It has found application in energy production, building industry, metallurgy, environment protection and medicine to name only a few [3,4,8,9]. The wide application of thermography results from a variety of advantages that systems based on object thermal analysis have.…”

Section: Thermographic Measurementsmentioning

confidence: 99%

“…Termowizja uważana jest obecnie za jedną z najbardziej interesujących metod diagnostyczno-obserwacyjnych. Znalazła zastosowanie w energetyce, budownictwie, hutnictwie, badaniach środowiska, medycynie i wielu innych dziedzinach [3,4,8,9]. Szerokie zastosowanie termowizji wynika z wielu zalet, jakie mają systemy pomiarowe oparte na analizie termicznej badanych obiektów.…”

Section: Pomiary Termowizyjneunclassified

The analysis of heating process of catalytic converter using thermo-vision

Worsztynowicz

2015

Combustion Engines

The article tackles the issues related to a process of heating of three way catalytic converter during the cold start and the heating of the spark ignition engine. The measurements on the test bench were performed, taking into consideration how engine works directly after the start, on the idle speed and under the load, during which the temperature of the exhaust gases in the exhaust system and coolant on the cylinder head were measured. At the same time the track of the heat state of the catalytic converter was monitored using thermo-vision camera. The results of the measurements were presented as charts and selected thermo-grams, qualitatively representing the issue of heating of the catalytic converter.

“…It is also used successfully to detect the stratification of infrastructure and buildings [2]. Such a technique (due to its noninvasiveness) has also been used in the medical sciences and related scientific research with positive response [3][4][5]. It can be a quick and effective tool to detect the information necessary to diagnose rare diseases [6].…”

Section: Introductionmentioning

confidence: 99%

The Thermographic Analysis of the Agglomeration Process in the Roller Press of Pillow-Shaped Briquettes

Bembenek

2022

Materials

When the briquetting process of fine-grained material takes place in the roller press unit, the pressure reached is over a hundred megapascals. This parameter is a result, among other factors, of the geometry of a compaction unit and also the properties of the consolidated material. The pressure of the unit is not constant and the changes in value depend on a given place on the molding surface. By the process of generating different types of pressure on the surface of briquettes, their compaction is different as well. The distribution of temperature on the surface of the briquettes may determine the pressure used locally on them. Nevertheless, the distribution of stress in the briquetting material is still a subject of scientific study. However, it is known that the pressure exerted on the briquette is different for different compaction systems. The article includes authors’ further thermography studies on the classical pillow-shaped briquetting process (instead of the saddle-shaped ones that were previously conducted) of four materials (calcium hydroxide and water mixture, mill scale, charcoal fines and starch mixture, as well as a mixture of EAFD, scale, fine coke breeze, molasses, and calcium hydroxide). Immediately after the briquettes left the compaction zone, thermal images were taken of them, as well as forming rollers. Thermograms that were obtained and the variability of temperature at characteristic points of the surface of pillow-shaped briquettes were analyzed. They showed differences in temperature on the surface of briquettes. In all four cases, the highest briquette temperatures were recorded in their upper part, which proves their better densification in this part. The temperature differences between the lower and upper part of the briquettes ranged from 1.8 to 9.7 °C, depending on the mixture.