Detail publikace
Vliv teploty vody na intenzitu chlazení během kontinuálního odlévání a válcování za tepla
HNÍZDIL, M. RAUDENSKÝ, M.
Český název
Vliv teploty vody na intenzitu chlazení během kontinuálního odlévání a válcování za tepla
Anglický název
Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
Two types of nozzles were tested to find out the influence of the water temperature on cooling intensity. The first type was a mist nozzle used in the secondary cooling area of a steel slab casting machine. The second type was a flat fan nozzle usually used during hot rolling and heat treatment process of rolled strips. These laboratory measurements of cooling intensity were performed in a temperature range of water temperature from 20 C to 80 C. A strong influence of the water temperature on cooling intensity was found. Changing the water temperature from 20 C to 80 C caused a change of heat transfer coefficient. For mist nozzle was found slightly increasing cooling intensity with growing water temperature. The difference was about 30 W m-2 K-1. For flat fan nozzle was found the decreasing cooling intensity with growing water temperature. The difference was about 110 W m-2 K-1. The main effect was not the change of heat transfer coefficient but the shift of Leidenfrost temperature to a lower temperature area. The change of water temperature from 20 C to 80 C caused the change of Leidenfrost temperature about 130 C for both nozzles. This can be a significant change of cooling and can affect the cooling character in industrial applications.
Český abstrakt
Pro zjištění vlivu teploty vody na intenzity chlazení byly provedeny experimenty se dvěma typy trysek. Prvním z nich byla vodo-vzdušná tryska, která se běžně používá během sekundárního chlazení při kontinuálním odlévání. Druhým typem byla tryska s plochým vodním paprskem, která se běžně používá při tepelném zpracování vývalků. Tyto laboratorní experimenty pro zjištění vlivu teploty vody na intenzitu chlazení byly provedeny s různými teplotami vody, a to v rozsahu od 20 do 80 C. Změna z 20 na 80 C vyvolala posun Leidenfrostovy teploty o 130 C.
Anglický abstrakt
Two types of nozzles were tested to find out the influence of the water temperature on cooling intensity. The first type was a mist nozzle used in the secondary cooling area of a steel slab casting machine. The second type was a flat fan nozzle usually used during hot rolling and heat treatment process of rolled strips. These laboratory measurements of cooling intensity were performed in a temperature range of water temperature from 20 C to 80 C. A strong influence of the water temperature on cooling intensity was found. Changing the water temperature from 20 C to 80 C caused a change of heat transfer coefficient. For mist nozzle was found slightly increasing cooling intensity with growing water temperature. The difference was about 30 W m-2 K-1. For flat fan nozzle was found the decreasing cooling intensity with growing water temperature. The difference was about 110 W m-2 K-1. The main effect was not the change of heat transfer coefficient but the shift of Leidenfrost temperature to a lower temperature area. The change of water temperature from 20 C to 80 C caused the change of Leidenfrost temperature about 130 C for both nozzles. This can be a significant change of cooling and can affect the cooling character in industrial applications.
Klíčová slova česky
Součinitel přestupu tepla, Leidenfrostova teplota, chladicí intenzita, válcování za tepla, kontinuální odlévání, teplota vody, vodo-vzdušná tryska, tryska s plochým vodním paprskem
Klíčová slova anglicky
Heat transfer coefficient, Leidenfrost temperature, cooling intensity, hot rolling, continuous casting, water temperature, mist nozzle, flat fan nozzle
Rok RIV
2012
Vydáno
16.05.2012
Nakladatel
TANGER LTD
Místo
OSTRAVA
ISBN
978-80-87294-31-4
Kniha
21ST INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2012)
Strany od–do
1–6
Počet stran
6
BIBTEX
@inproceedings{BUT92787,
author="Milan {Hnízdil} and Miroslav {Raudenský},
title="Influence of Water Temperature on the Cooling Intensity during Continuous Casting and Hot Rolling",
booktitle="21ST INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2012)",
year="2012",
month="May",
pages="1--6",
publisher="TANGER LTD",
address=" OSTRAVA",
isbn="978-80-87294-31-4"
}