Publication detail

INFLUENCE OF WATER TEMPERATURE ON HEAT TRANSFER COEFFICIENT IN SPRAY COOLING OF STEEL SURFACES

CHABIČOVSKÝ, M. RAUDENSKÝ, M. HNÍZDIL, M.

Original Title

INFLUENCE OF WATER TEMPERATURE ON HEAT TRANSFER COEFFICIENT IN SPRAY COOLING OF STEEL SURFACES

English Title

INFLUENCE OF WATER TEMPERATURE ON HEAT TRANSFER COEFFICIENT IN SPRAY COOLING OF STEEL SURFACES

Type

conference paper

Language

en

Original Abstract

Cooling of stainless steel surfaces with flat fan nozzles was studied experimentally. Several configurations of jets and pressures were tested. Tests were done with variable coolant (water) temperatures (20 C , 40 C , 60 C and 80 C). The influence of coolant temperature on the heat transfer coefficient was investigated. An increase in coolant temperature caused a significant decrease of the Leidenfrost temperature (temperature at which the character of boiling is changed - the film boiling is changed into nucleate boiling). Changing the water temperature from 20 C to 80 C caused a change of the Leidenfrost temperature of about 140 C. Furthermore it was observed that in a high temperature region (above Leidenfrost temperature) the heat transfer coefficient has the highest value for the lowest water temperature and for the high coolant temperature (80 C) the cooling intensity is the lowest.

English abstract

Cooling of stainless steel surfaces with flat fan nozzles was studied experimentally. Several configurations of jets and pressures were tested. Tests were done with variable coolant (water) temperatures (20 C , 40 C , 60 C and 80 C). The influence of coolant temperature on the heat transfer coefficient was investigated. An increase in coolant temperature caused a significant decrease of the Leidenfrost temperature (temperature at which the character of boiling is changed - the film boiling is changed into nucleate boiling). Changing the water temperature from 20 C to 80 C caused a change of the Leidenfrost temperature of about 140 C. Furthermore it was observed that in a high temperature region (above Leidenfrost temperature) the heat transfer coefficient has the highest value for the lowest water temperature and for the high coolant temperature (80 C) the cooling intensity is the lowest.

Keywords

Spray cooling, Heat Transfer, Leidenfrost temperature, cooling with hot water

RIV year

2012

Released

14.05.2012

Publisher

J. Náprstek, C. Fischer

Location

Svratka

ISBN

978-80-86246-39-0

Book

ENGINEERING MECHANICS 2012

Edition number

18

Pages from

126

Pages to

127

Pages count

408

URL

BibTex


@inproceedings{BUT92133,
  author="Martin {Chabičovský} and Miroslav {Raudenský} and Milan {Hnízdil}",
  title="INFLUENCE OF WATER TEMPERATURE ON HEAT TRANSFER COEFFICIENT IN SPRAY COOLING OF STEEL SURFACES",
  annote="Cooling of stainless steel surfaces with flat fan nozzles was studied experimentally. Several configurations of jets and pressures were tested. Tests were done with variable coolant (water) temperatures (20 C , 40 C , 60 C and 80 C). The influence of coolant temperature on the heat transfer coefficient was investigated. An increase in coolant temperature caused a significant decrease of the Leidenfrost temperature (temperature at which the character of boiling is changed - the film boiling is changed into nucleate boiling).  Changing the water temperature from 20 C to 80 C caused a change of the Leidenfrost temperature of about 140 C. Furthermore it was observed that in a high temperature region (above Leidenfrost temperature) the heat transfer coefficient has the highest value for the lowest water temperature and for the high coolant temperature (80 C) the cooling intensity is the lowest.",
  address="J. Náprstek, C. Fischer",
  booktitle="ENGINEERING MECHANICS 2012",
  chapter="92133",
  howpublished="print",
  institution="J. Náprstek, C. Fischer",
  year="2012",
  month="may",
  pages="126--127",
  publisher="J. Náprstek, C. Fischer",
  type="conference paper"
}