Ocenę pracy cieplnej pieca przepychowego wykonano za pomocą analizy energetycznej z wykorzystaniem entalpii dewaluacji. Przedstawiono metodykę prowadzenia obliczeń bilansowych oraz wyniki obliczeń dla pieca pracującego w warunkach rzeczywistych. Wykazano, że na bazie obliczeń bilan sowych możliwe jest stwierdzenie wadliwej pracy pieca lub jego składowych. W przypadku pieca poddawanego ocenie stwierdzono dużą nieszczelność rekuperatora powietrza spalania. Wyznaczono również podstawowe wskaźniki pracy cieplnej pieca grzewczego.
EN
Evaluation of the pusher furnace thermal work has been made by the energy analysis with enthalpy devaluation. The methodology of the heat balance calculation has been presented. Also, the results of the calculation for the furnace working in the real conditions has been shown. It has been indicated that, based on the heat balance calculation it is possible to stated if the furnace or its components work properly. In the case of the considered furnace, a large escape of the combustion air from the recuperator was found. The basic indicators of thermal work of the heating furnace were also determined.
Every year rapid industrialization and the following urbanization fuel the global demand for steel. The use of steel products contributes to the sustainable development of society. The scale growth mechanism accompanies the high-temperature plastic working of metals and alloys. The article focuses on the thickness of the scale formed as a result of annealing steel samples in a furnace. Samples made of S235 (A283C) steel were heated at two temperatures, 1100ºC and 1200ºC, for 8 minutes. The amount of scale formed was determined on the basis of photos taken with a light microscope. The transformed equations of steel oxidation kinetics were used in the computational part. The scale thickness obtained numerically corresponded to the scale formed in real conditions. The aim of the research was to adjust the scale growth model on steel so that it gives correct results in relation to the actual thickness of the formed oxidized layer.
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