本文選題：相變 + 機(jī)械送風(fēng)��； 參考：《化工學(xué)報(bào)》2017年07期

【摘要】：現(xiàn)階段用于建筑圍護(hù)結(jié)構(gòu)的相變構(gòu)件在蓄熱階段存在蓄熱速率較低的問題。為了提高相變構(gòu)件在蓄熱過程中的蓄熱速率,將相變構(gòu)件與機(jī)械通風(fēng)相結(jié)合,搭建了相變構(gòu)件熱性能研究實(shí)驗(yàn)臺,測試了不同送風(fēng)溫度和送風(fēng)風(fēng)速工況下相變構(gòu)件的蓄熱性能,采用了有限差分法通過Matlab軟件對相變構(gòu)件蓄熱過程進(jìn)行數(shù)值計(jì)算以拓展實(shí)驗(yàn)送風(fēng)溫度工況,將風(fēng)機(jī)能耗考慮在內(nèi),對系統(tǒng)整體的節(jié)能效果進(jìn)行了分析,提出了有效的送風(fēng)方法。結(jié)果表明:提高送風(fēng)溫度或風(fēng)速可縮短構(gòu)件相變完成時(shí)間,同時(shí)可以提高構(gòu)件表面蓄熱熱流,當(dāng)送風(fēng)風(fēng)速為1.0 m·s~(-1),送風(fēng)溫度由34℃提高到80℃時(shí),液化過程的平均熱流由23 W提高到322 W;同一送風(fēng)風(fēng)速工況下,最佳送風(fēng)時(shí)間最終穩(wěn)定在固定值;在送風(fēng)溫度80℃,送風(fēng)風(fēng)速2.0 m·s~(-1)條件下,送風(fēng)1.6 h時(shí),系統(tǒng)能達(dá)到最大節(jié)能量,為891.8 k J。
[Abstract]:At present, the phase change components used in building envelope have the problem of low heat storage rate in the stage of heat storage. In order to improve the heat storage rate of phase change components in the process of heat storage, the thermal performance of phase change components was studied by combining phase change components with mechanical ventilation, and the thermal performance of phase change components under different air temperature and wind speed was tested. The finite difference method is used to numerically calculate the thermal storage process of phase change elements by Matlab software to expand the experimental air supply temperature condition. The energy consumption of the fan is taken into account. The energy saving effect of the whole system is analyzed and an effective air supply method is put forward. The results show that increasing the air supply temperature or wind speed can shorten the completion time of phase change and increase the heat flux on the surface of the component. When the air velocity is 1.0 m s ~ (-1), the air supply temperature is increased from 34 鈩，

本文編號：2118519