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Freezing of water saturated in aluminum wool mats

Sugawara, M. and Onodera, T. and Komatsu, Y. and Tago, M. and Beer, Hans (2008):
Freezing of water saturated in aluminum wool mats.
In: Heat and Mass Transfer, 44 (7), pp. 835-843. ISSN 0947-7411,
[Article]

Abstract

This paper is concerned with the freezing of water saturated in aluminum wool mats (AWM) around a cooling pipe. Two arrangements of AWM around the pipe are considered, i.e. a disk-type and a roll-type. Freezing mass M(kg/m2) in the disk type for a porosity ɛ = 0.95, indicates to be two times larger compared with that without AWM (i.e. ɛ = 1) at the freezing time t = 180 min. Even a small AWM volume fraction enhances considerably freezing of water in the disk type. However, freezing enhancement in the roll type is small compared with that of the disk type. Numerical calculation predicts well freezing at the disk type arrangement by using an anisotropy model for the effective thermal conductivity of ice/water saturated AWM, however, poor predictions for the roll type arrangement.

Item Type: Article
Erschienen: 2008
Creators: Sugawara, M. and Onodera, T. and Komatsu, Y. and Tago, M. and Beer, Hans
Title: Freezing of water saturated in aluminum wool mats
Language: English
Abstract:

This paper is concerned with the freezing of water saturated in aluminum wool mats (AWM) around a cooling pipe. Two arrangements of AWM around the pipe are considered, i.e. a disk-type and a roll-type. Freezing mass M(kg/m2) in the disk type for a porosity ɛ = 0.95, indicates to be two times larger compared with that without AWM (i.e. ɛ = 1) at the freezing time t = 180 min. Even a small AWM volume fraction enhances considerably freezing of water in the disk type. However, freezing enhancement in the roll type is small compared with that of the disk type. Numerical calculation predicts well freezing at the disk type arrangement by using an anisotropy model for the effective thermal conductivity of ice/water saturated AWM, however, poor predictions for the roll type arrangement.

Journal or Publication Title: Heat and Mass Transfer
Journal volume: 44
Number: 7
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Exzellenzinitiative
Exzellenzinitiative > Clusters of Excellence
Zentrale Einrichtungen
Exzellenzinitiative > Clusters of Excellence > Center of Smart Interfaces (CSI)
Date Deposited: 17 Mar 2015 15:03
Official URL: http://dx.doi.org/10.1007/s00231-007-0300-5
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