Study On Heat Release Characteristics Of Energy Storage Body In Solid Heat Storage Device

With the continuous development of economy and society,the public’s living standard rises steadily,and the requirements for the quality of life are also constantly improving,and the way of heating is changing.From the world energy analysis,the traditional coal heating method does not meet the development requirements of low-carbon economy,using new clean energy technology to solve the heating problem is a feasible measure.Solid heat storage technology is one of the specific applications of energy storage technology.The heat source is difficult to store wind power,photoelectric or low-valley electric energy.The solid temperature is raised by electric heating,and the energy is stored in solid bricks.After the application of this technology,it is found that due to the difference of cooling rate in the process of heat release,the internal temperature distribution of heat accumulator is uneven,and part of brick body starts to work before the completion of heat release electric heating wire,resulting in heat accumulation and burning heating wire safety operation problems.The regenerator internal bricky system centralized more accumulation pattern,this article first regenerator structure of currently widely used numerical simulation,the analysis found that the traditional centralized accumulation configuration mode,the fluid in contact with the brick area is finite,bricky system away from the hole position cannot be convective heat transfer process to achieve the purpose of the position each brick uniform cooling,the heat transfer in the regenerative body is mainly carried out by convective heat transfer,and the flow rate has a great influence on the convective heat transfer coefficient.Exothermic regularity,this paper simulated the calculating of the according to the working condition of simulated structures,test bench,the study way of regenerative bricky system configuration and import flow in regenerator heat release characteristics,the influence of different working conditions,analysis of lower thermal efficiency and uniformity,and the experimental results and simulation comparison,test and verify the reliability of numerical analysis,a more credible conclusions.Studies found that change the regenerator internal structure on the velocity field and temperature field distribution has obvious effect,increase the quantity of bricky system between column and column air duct,can to a certain extent,improve regenerator exothermic regularity in different locations,measuring point under the condition of the same heat release time difference in temperature between smaller and fluid in each state change smaller pore distribution,and at the end of the heat release,the average temperature of brick body in multi-duct condition is lower than that in less duct condition,that is,the cooling range is larger in the process of heat release,the heat release is more,and the heat release efficiency is better.The similarity principle is used to change the inlet wind speed condition,and the analysis shows that when the inlet flow velocity increases from 6m/s to 12m/s,the fluid velocity field distribution changes.High flow velocity condition,cross section channel in the velocity difference is the largest,but smaller velocity distribution uniformity coefficient of differences between different working conditions,the change of velocity condition,the regenerator heating uniformity affected is limited,but the average temperature of exothermic late bricky system is put in bigger difference,the working condition of high velocity after heating temperature is lower and put a greater quantity of heat,in the heating stage better energy efficiency,It has a good promoting effect on efficient heating.The comparison between the experiment and simulation shows that there is a reasonable deviation between the two results,and the results have good accuracy.That is,the structure of heat accumulator and the inlet flow rate have a significant impact on the heat release effect of the heat accumulator.Increasing the number of cooling air channels between brick bodies and increasing the inlet flow rate can improve the cooling efficiency of brick bodies,which is conducive to the heat exchange process.The heat release uniformity of brick body is mainly affected by the structure of heat accumulator,and the flow rate has little influence on the coefficient of heat release uniformity.From the perspective of safe operation,optimizing the structure of heat accumulator can solve the burning problem of heating wire caused by uneven heat release to a greater extent and reduce the heat accumulation phenomenon.