本文關(guān)鍵詞：相變蓄能墻多因素?zé)崽匦苑治黾皟?yōu)化研究　出處：《建筑科學(xué)》2016年08期 　論文類(lèi)型：期刊論文

  更多相關(guān)文章： 相變蓄能 熱特性 數(shù)值模擬 影響因素 最優(yōu)化 相變材料

【摘要】：建筑圍護(hù)結(jié)構(gòu)的熱損失是建筑內(nèi)部熱量散失的主要途徑。與傳統(tǒng)墻體保溫材料不同,相變蓄能技術(shù)可以利用潛熱蓄能達(dá)到數(shù)倍于普通圍護(hù)結(jié)構(gòu)的蓄熱和熱惰性效果。該文針對(duì)我國(guó)北方地區(qū)夏季蓄冷,利用熱焓法建立相變蓄能墻體物理模型并進(jìn)行數(shù)值模擬,通過(guò)蓄熱量、延遲性及熔化過(guò)程3個(gè)指標(biāo)為依據(jù)來(lái)分析相變蓄能墻的因素影響特性。結(jié)果表明:夏季相變材料層設(shè)置在室內(nèi)側(cè)位置更有利;隨著室內(nèi)對(duì)流換熱系數(shù)的增大,相變材料層的蓄熱量隨之增大,而延遲時(shí)間減小;相變材料層存在蓄熱性能最優(yōu)的最佳厚度;墻體材料和厚度的選擇同樣起到關(guān)鍵性作用,墻體材料厚度越大反而越不利于相變材料的蓄熱性。該文所得出的優(yōu)化結(jié)論對(duì)相變墻結(jié)構(gòu)的優(yōu)化與應(yīng)用提供參考。
[Abstract]:The heat loss of building envelope structure is the main way of heat loss in building, which is different from the traditional wall insulation material. Phase change energy storage technology can use latent heat storage energy to achieve several times as much heat storage and thermal inert effect as ordinary envelope structure. This paper aims at summer cold storage in northern China. The physical model of phase change energy storage wall is established by enthalpy method and numerical simulation is carried out. Based on the three indexes of delay and melting process, the influence characteristics of phase change energy storage wall are analyzed. The results show that the phase change material layer is more favorable to the indoor side in summer. With the increase of indoor convection heat transfer coefficient, the heat storage of phase change material layer increases and the delay time decreases. The optimum thickness of the thermal storage property exists in the phase change material layer. The selection of wall material and thickness also plays a key role, and the greater the thickness of wall material is, the more unfavorable the heat storage of phase change material is. The optimized conclusion in this paper provides a reference for the optimization and application of phase change wall structure.
【作者單位】： 河北工業(yè)大學(xué)能源與環(huán)境工程學(xué)院;河北工業(yè)大學(xué)土木與交通學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目“相變蓄熱墻耦合太陽(yáng)能熱源蓄換熱機(jī)理及輻射供暖特性研究”(51408184) 天津市自然科學(xué)基金資助項(xiàng)目“建筑相變蓄熱內(nèi)圍護(hù)結(jié)構(gòu)調(diào)溫機(jī)理及效果研究”(15JCQNJC07800) 河北省教育廳優(yōu)秀青年基金資助項(xiàng)目“被動(dòng)式相變蓄能墻蓄換熱機(jī)理及多因素耦合敏感性研究”(YQ2014005) 天津建委科技資助項(xiàng)目“被動(dòng)房在高速沿線應(yīng)用研究”(2015-13)
【分類(lèi)號(hào)】：TB34;TU111.4
【正文快照】： [二次修回]2016-04-26助項(xiàng)目“被動(dòng)房在高速沿線應(yīng)用研究”(2015-13)0引言相變蓄能技術(shù)與圍護(hù)結(jié)構(gòu)相結(jié)合既能滿足現(xiàn)代人們對(duì)輕質(zhì)圍護(hù)結(jié)構(gòu)的需求,又能減少建筑能耗和提高室內(nèi)熱舒適[1-2]。國(guó)內(nèi)外學(xué)者對(duì)其影響因素進(jìn)行了分類(lèi)研究。Kim和Darkwa[3]得出復(fù)合PCM-墻板系統(tǒng)相較于隨機(jī)

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