摘要
为有效解决电能供需矛盾、改善储能电炉蓄热能力,研究基于TRNSYS平台的PCM层储能电炉蓄热过程的数值模拟方法。以蓄热式储能电炉物理模型为基础,在TRNSYS软件中建立储能电炉数学模型,采用PCM层分析储能电炉蓄热过程,实现建模、整理数据、求解、分析处理于一体的储能电炉蓄热数值模拟操作。实验结果表明:电炉体积为20 m^(3)、蓄热流量为25 m^(3)/h、蓄热温度23/13℃时电炉蓄热率最高;蓄热流量越小蓄热量越高,且蓄热流量对蓄热率影响显著;蓄热电炉上、中、下部温度总体变化趋势均为蓄热-平稳-蓄热,蓄热电炉内流体流速越大蓄热时间越短;蓄热式储能电炉内渐变螺距蓄热装置相较于恒定螺距蓄热装置的蓄热时间短;蓄热式储能电炉相变蓄热材料融化时间随密度增加而增加;当相变蓄热材料密度较小时,相变蓄热材料的平均流速大。
In order to effectively solve the contradiction between supply and demand of electric energy and improve the thermal storage capacity of electric furnace with energy storage,the numerical simulation method of thermal storage process of electric furnace with energy storage in PCM layer based on TRNSYS platform is studied.Based on the physical model of the energy storage electric furnace,the mathematical model of the energy storage electric furnace is established in TRNSYS software.The PCM layer is used to analyze the heat storage process of the ener-gy storage electric furnace,and the numerical simulation operation of the energy storage electric furnace integrating modeling,data sorting,so-lution and analysis is realized.The experimental results show that when the volume of the electric furnace is 20 m^(3),the heat storage flow is 25 m^(3)/h,and the heat storage temperature is 23/13℃,theheat storagerateof theelectric furnaceisthehighest;Thesmaller theheat stor-age flow is,the higher the heat storage capacity is,and the heat storage flow has a significant effect on the heat storage rate;The overall change trend of the temperature in the upper,middle and lower parts of the regenerative electric furnace is regenerative-stable-regenera-tive.The larger the fluid flow rate in the regenerative electric furnace,the shorter the thermal storage time;Compared with the constant pitch heat storage device,the heat storage time of the gradual pitch heat storage device in the regenerative energy storage electric furnace is shorter;The melting time of the phase change heat storage material increases with the increase of the density;When the density of the phase change heat storage material is small,the average flow rate of the phase change heat storage material is large.
作者
张浩
黄锦华
郁丹
ZHANG Hao;HUANG Jinhua;YU Dan(Zhejiang Huayun Electric Power Engineering Design&Consultation Co.Ltd.,Hangzhou 310014,China)
出处
《工业加热》
CAS
2023年第8期21-25,31,共6页
Industrial Heating
基金
浙江省科技项目(202000452150)。
关键词
TRNSYS平台
PCM层
储能电炉
数值模拟
蓄热耐火材料
蓄热率
TRNSYS platform
PCM layer
energy storage furnace
numerical simulation
regenerative refractories
rate of heat storag
