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한국강구조학회 학술지영문홈페이지
[ Article ]
Journal of Korean Society of Steel Construction - Vol. 36, No. 6, pp.365-375
ISSN: 1226-363X (Print) 2287-4054 (Online)
Print publication date 27 Dec 2024
Received 15 Nov 2024 Revised 28 Nov 2024 Accepted 28 Nov 2024
DOI: https://doi.org/10.7781/kjoss.2024.36.6.365

동절기 STS 물탱크의 단열재 설계에 따른 물의 동결 특성 분석

이충열1 ; 신현준2 ; 여경윤3 ; 김근표4 ; 김진국5, *
1석사과정, 서울과학기술대학교, 건설시스템공학과
2학사과정, 서울과학기술대학교, 건설시스템공학과,
3수석연구원, 포스코 철강솔루션연구소 구조연구그룹, 공학박사
4대표이사, ㈜원진
5부교수, 서울과학기술대학교, 건설시스템공학과
Analysis of Water Freezing Characteristics According to Insulation Design of STS Water Tanks in Winter
Lee, Chung-Yeol1 ; Shin, Hyeon-Jun2 ; Yoh, Kyong-Yun3 ; Kim, Geun-Pyo4 ; Kim, Jin-Kook5, *
1Graduate Student(Master Course), Dept. of Civil Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea
2Undergraduate Student, Dept. of Civil Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea
3Senior Researcher, Steel Structure Research Group, POSCO, Incheon, 21985, Korea
4Chief Executive Officer, WONJIN Co., Boseong, 59443, Korea
5Associate Professor, Dept. of Civil Engineering, Seoul National University of Science and Technology, Seoul, 01811, Korea

Correspondence to: *Tel. +82-2-970-6578 Fax. +82-2-948-0043 E-mail. jinkook.kim@seoultech.ac.kr

Copyright © 2024 by Korean Society of Steel Construction

초록

이 연구는 배수지용 STS 물탱크가 동절기 외기온도에 노출되는 조건에서 물의 동결 특성을 분석하는 것을 목표로 한다. 대용량 STS 물탱크 내 열전달 특성 분석을 위해 열전달 해석 모델을 2D 대칭 모델로 구성하고, 48시간의 동절기 외기 온도를 적용하여 단열재 두께에 따른 열전달 해석을 수행하였다. 물의 온도 변화율 및 상변화 시간을 비교하였을 때, STS 물탱크 중앙 외측부의 경우 동결의 영향이 미미했으나, 하단 지지부의 경우 단열재 두께와 관계없이 물탱크 내부 물에 동결이 발생하면서 중앙 외측부에 비해 열손실에 더 취약한 것으로 나타났다. 나아가, 열손실 취약부인 하단 지지부에 대해 단열재 배치방식을 변수로 매개변수해석을 수행하여 단열재 배치에 따른 열전달 특성 변화로 물의 동결 특성을 정립하였다. 이후, 물의 최소·최대 체류시간을 기준으로 동결시간을 비교하여 효과적인 단열재 설계방안을 제안하였다.

Abstract

The purpose of this study is to analyze the freezing characteristics of water in STS water tanks for reservoirs exposed to outside temperatures in winter. A large-scale STS water tank was modeled as a 2D symmetric analysis model, and heat transfer analysis was performed for 48 hours using winter outside temperatures to observe temperature trends in water at the tank’s outer part of the center and supported part of the bottom by insulation thickness. Through the temperature change rate and phase change time of water, the analysis model confirmed that the bottom is more vulnerable to heat loss of water than the side. Furthermore, parametric study was conducted using the insulation placement at the bottom of the tank as a variable and water freezing characteristics were established based on the heat transfer characteristics change according to insulation placement. An effective insulation design was proposed by comparing freezing time for each insulation placement based on minimum and maximum residence time of water.

Keywords:

Stainless steel water tank, Water freezing, Phase change, Heat transfer, Insulation

키워드:

스테인리스강 물탱크, 물 동결, 상변화, 열전달, 단열재

Acknowledgments

본 연구는 ㈜포스코와 정부(과학기술통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(N0. 2022R1F1A1074002).

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