本文關(guān)鍵詞： 毛細管輻射系統(tǒng) 地面鋪設(shè)材料 傳熱分析 數(shù)值模擬 熱舒適性　出處：《東華大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾年來,能源緊張不斷加劇,節(jié)能問題日益成為焦點話題。建筑能耗所占總能耗的比例較大,而毛細管輻射系統(tǒng)溫濕度獨立控制的技術(shù)能夠解決傳統(tǒng)空調(diào)能源浪費的問題,毛細管輻射系統(tǒng)引入國內(nèi)后得到了一定程度的發(fā)展,毛細管網(wǎng)的鋪設(shè)方式和其末端所用地面鋪設(shè)材料直接影響毛細管系統(tǒng)的使用效果,且市場上可用地面鋪設(shè)材料種類眾多,本文研究了地面鋪設(shè)材料對毛細管末端換熱的影響,并在此基礎(chǔ)上研究了毛細管網(wǎng)鋪設(shè)方式對房間熱舒適性的影響。在研究中首先對家居裝修和建材市場進行調(diào)研,選取主流地面鋪設(shè)材料收集樣材,主要有瓷磚、石材和木地板三大類,用第三代C-Therm TCi熱導(dǎo)率分析儀對樣材的熱物性參數(shù)進行測試。利用測試數(shù)據(jù)采用Fluent模擬的方法建立地面?zhèn)鳠崮Ｐ?模擬了分別用普通型水泥砂漿和節(jié)能型水泥砂漿鋪設(shè)樣材時毛細管末端向地面的傳熱情況,得出在相同供水溫度下,地面鋪設(shè)材料的導(dǎo)熱系數(shù)越高,換熱能力越強,石材的換熱能力最強,瓷磚次之,木地板最低。以木地板為基礎(chǔ),使用普通型水泥砂漿(導(dǎo)熱系數(shù)0.75W/(m?K))時,鋪設(shè)石材的地板表面溫度比木地板高出8.9%~9.6%,鋪設(shè)瓷磚時比木地板高出7.9%;使用節(jié)能型水泥砂漿(導(dǎo)熱系數(shù)6W/(m?K))時,鋪設(shè)石材的地板表面溫度比木地板高出10%~11.78%,鋪設(shè)瓷磚時比木地板高出8.59%等結(jié)論。在模擬毛細管-地面?zhèn)鳠岬幕A(chǔ)上,再次運用Fluent模擬房間采用地面輻射采暖、墻壁輻射采暖、墻壁輻射供冷和頂板輻射供冷時室內(nèi)的熱環(huán)境,并利用Matlab編制PMV-PPD方程,計算室內(nèi)的PMV值,評價不同鋪設(shè)方式時房間的熱舒適性,并得出:(1)同等采暖工況下,地板輻射采暖工況時房間的平均溫度比墻壁輻射采暖時高出3℃,地板輻射采暖更容易滿足室內(nèi)溫度要求,有利于節(jié)能。(2)用Matlab對PMV-PPD公式進行編程,計算得出地板輻射采暖時房間的PMV值為-0.1~0,墻壁輻射采暖時房間的PMV值為0~0.3,因此兩種采暖房間相比條件下,地板輻射采暖的熱舒適度優(yōu)于墻壁輻射采暖。(3)建立房間毛細管網(wǎng)輻射供冷模型得出同等供冷工況下,墻壁輻射制冷時房間的溫度為27~28℃,頂板輻射制冷的溫度為25.5~30℃,溫度梯度大,相比之下,墻壁輻射制冷房間溫度分布更加均勻。(4)同等供冷工況下,墻壁輻射制冷PMV值都處于0~0.3之間,頂板輻射制冷PMV值處于0.1~0.5之間,墻壁輻射制冷能夠獲得更好的熱舒適性。本文的研究將地面鋪設(shè)材料對毛細管末端換熱的影響具體化,清晰了鋪設(shè)方式對室內(nèi)熱環(huán)境的影響,對行業(yè)設(shè)計、家居選材以及工程施工具有一定的指導(dǎo)意義,毛細管輻射系統(tǒng)整體熱舒適性高,滿足節(jié)能要求,能源緊張的大背景下?lián)碛泻芎玫陌l(fā)展前景。
[Abstract]:In recent years, energy tension has been increasing, and energy conservation has become a hot topic. Building energy consumption accounts for a large proportion of total energy consumption, while the capillary radiation system temperature and humidity independent control technology can solve the problem of traditional air-conditioning energy waste. The capillary radiation system has been developed to a certain extent since it was introduced into China. The laying mode of capillary net and the ground laying material used at the end of the capillary net directly affect the use effect of the capillary system, and there are many kinds of floor laying materials available in the market. In this paper, the influence of ground laying materials on the heat transfer at the end of the capillary tube is studied, and the influence of the laying mode of the capillary net on the thermal comfort of the room is studied. In the first step of the study, the domestic decoration and the building materials market are investigated. Select the mainstream floor laying materials to collect sample materials, mainly ceramic tile, stone and wood flooring three categories, The third generation C-Therm TCi thermal conductivity analyzer was used to test the thermal properties of the sample. The ground heat transfer model was established by Fluent simulation. The heat transfer from the end of the capillary tube to the ground is simulated when the common cement mortar and the energy saving cement mortar are used respectively. It is concluded that the higher the thermal conductivity of the ground laying material is, the stronger the heat transfer capacity is at the same water supply temperature. The heat transfer ability of stone is strongest, ceramic tile is the second, wood floor is the lowest. Based on wood floor, common cement mortar is used (thermal conductivity is 0.75 W / m? When laying stone, the surface temperature of stone floor is 8.9% higher than that of wood floor, and that of ceramic tile is 7.9% higher than that of wood floor. On the basis of simulating the heat transfer between capillary and ground, the surface temperature of stone floor is 10 ~ 11.78 higher than that of wood floor, and that of ceramic tile is 8.59% higher than that of wood floor. On the basis of simulating capillary-ground heat transfer, Fluent is used to simulate the floor radiation heating in the room again. The indoor thermal environment of wall radiation heating, wall radiation cooling and roof radiation cooling, and using Matlab to compile the PMV-PPD equation, calculate the indoor PMV value, evaluate the thermal comfort of the room under different laying modes, and get the same heating condition under the same heating condition. The average room temperature under floor radiation heating condition is 3 鈩，

本文編號：1508651