Analysis on the Temperature Stabilities for Chilled Water Flow Passing a Submerged and Heated Sphere

Zhao Wenxuan; Zhang Xu; Ye Wei; Wu Chao

doi:10.3969/j.issn.0253-4339.2020.01.068

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Analysis on the Temperature Stabilities for Chilled Water Flow Passing a Submerged and Heated Sphere

更新时间：2024-07-18

- Analysis on the Temperature Stabilities for Chilled Water Flow Passing a Submerged and Heated Sphere
- Journal of Refrigeration Vol. 41, Issue 1, (2020)
- 作者机构：
  
  1. 同济大学机械与能源工程学院
  2. 同济大学工程结构性能演化与控制教育部重点实验室
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0253-4339.2020.01.068
  CLC：
- Published：2020
- 稿件说明：
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Zhao Wenxuan, Zhang Xu, Ye Wei, et al. Analysis on the Temperature Stabilities for Chilled Water Flow Passing a Submerged and Heated Sphere[J]. Journal of refrigeration, 2020, 41(1).
DOI：

Zhao Wenxuan, Zhang Xu, Ye Wei, et al. Analysis on the Temperature Stabilities for Chilled Water Flow Passing a Submerged and Heated Sphere[J]. Journal of refrigeration, 2020, 41(1). DOI： 10.3969/j.issn.0253-4339.2020.01.068.

摘要

本文通过推导在冷冻水绕流发热球体传热过程中，水池内水体平均温度随时间的变化公式，研究冷冻水理论降温所需最小流量、水体稳定温度和所需稳定时间的主要影响因素，分析水池内所容纳水体质量及初始温度、冷冻水流量及温度等参数对水体温度稳定性的影响。根据某工程实际情况确定冷冻水温度、流量等参数，运用理论推导公式和CFD模拟技术计算水体温度稳定性。结果表明：当冷冻水温度为17 ℃时，理论最小质量流量为83.67 t/h。经过6~7个月后水体温度将达到稳定，稳定温度为22.44 ℃。

Abstract

In this paper

the design of the chilled water system that is used to neutralize heat was investigated. First

the stability of the water temperature was defined as: 1) The steady-state temperature; and 2) the time to reach steady-state temperature distribution in the pool. Then

a formula was deduced

by considering the heat transfer between the chilled water and heat sources

to represent the average temperature of the water in the pool over time. The main influencing factors of the theoretical minimum flow for cooling

steady-state temperature

required time

(e.g.

initial water temperature in the pool) mass flow rate

and temperature of the chilled water

were also analyzed. Finally

by determining key parameters

such as the mass flow rate and temperature of the chilled water in accordance to theneed in a real project

the temperature distribution of the pool water was examined using both computational fluid dynamics (CFD) simulation and theoretical calculation. The results showed that when the temperature of the chilled water was 17 ℃ the theoretical minimum flow was calculated as 83.67 t/h. After 6–7 months

the average temperature of the water in the pool could reach the steady-state temperature of 22.44 ℃.

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