超温水体的水面综合散热系数实测及其温升变化数值模拟
The measured heat transfer coefficients and numerical simulation of temperature rise change in superheated water bodies
杨洁 1熊丛博 1孙惠凤 1刘艳玲 2周涛 1迟万清1
作者信息
- 1. 自然资源部第一海洋研究所,山东青岛 266061
- 2. 中国海洋大学,山东青岛 266100
- 折叠
摘要
为提高滨海电厂设计阶段温排水数值模拟的准确性,本文基于箱式模型提出了一种水面综合散热系数的实测方法,并在湄洲湾电厂附近海域进行了现场观测,结果表明:实测水面综合散热系数在不同潮型观测时间内波动剧烈,昼夜间变化幅度明显不同,昼间受太阳辐射影响波动较剧烈.同时基于箱式模型的模拟结果表明,相比选取经验常数,采用实测系数的模拟结果可以反映由于太阳辐射等外在因素所导致的温升变化,与实测温度变化过程更符合.本文提出的超温水体水面综合散热系数的实测方法,可提高温排水数值模拟中水面综合散热系数取值的准确性,对于科学合理地确定温排水影响范围具有重要意义.
Abstract
In the design phase of a coastal power plant,numerical simulation is usually used to predict the influence scope of thermal water discharge needing the realistic heat transfer coefficients.The coef-ficient was almost judged based on experience and lack of systematic research actually so far.To solve this problem,this paper analyzed the comprehensive heat dissipation of the Meizhou bay power plant,and proposed a method for measuring the coefficients.The measured data showed that heat transfer co-efficients fluctuated dramatically during high and low tides,so the empirical constant was not complete-ly reliable with deviation.Conversely,the model results could reflect the temperature rise change more accurately caused by external factors,which was more consistent with the measured.This simulation method increased the accuracy of the heat transfer coefficients,and it had an important progress in ra-tionally determining the influence of thermal water drainage.
关键词
超温水体/水面综合散热系数/温升/温排水数值模拟/箱式模型Key words
superheated water bodies/heat transfer coefficients/temperature rise/numerical simula-tion/box model引用本文复制引用
出版年
2024
NETL
NSTL
万方数据