本文選題：節(jié)能屋頂　切入點：PE-RT管　出處：《天津大學》2014年碩士論文　論文類型：學位論文

【摘要】：相變材料和反射隔熱涂料應(yīng)用于建筑領(lǐng)域,能夠有效降低建筑能耗,提高室內(nèi)熱舒適性。本文旨在研究一種集成相變材料和反射隔熱涂料的節(jié)能屋頂,具體包括相變材料的配制和封裝方法、屋頂?shù)脑O(shè)計和建造方案、實體實驗房間測試分析及Trnsys傳熱模型的建立等內(nèi)容。本文首先闡述了節(jié)能屋頂?shù)母魺嵩�。根�?jù)相關(guān)規(guī)范選擇了合適的反射隔熱涂料,并以高級脂肪酸和高碳醇為原料,利用低共熔混合原理和DSC測試配制了合適的相變材料。為了滿足相變材料的使用要求,又設(shè)計了以PE-RT管為組件,采用熱熔連接而成的相變材料封裝裝置。依據(jù)節(jié)能屋頂?shù)母魺嵩泶_定了屋頂?shù)脑O(shè)計和建造方法,屋頂由內(nèi)至外依次為屋頂基礎(chǔ)層、防水層、粘結(jié)砂漿層、相變層、抗裂砂漿層和反射涂料層。為了測試分析節(jié)能屋頂?shù)男阅?搭建了1#(PCM屋頂)、2#(CR屋頂)、3#(PCR屋頂)三間全尺寸實驗房間。在密閉門窗(減少外界干擾因素)的狀況下,分別測試了室外氣候參數(shù),屋頂溫度及熱流等參數(shù)。通過對比分析發(fā)現(xiàn),節(jié)能屋頂相比其他屋頂,屋頂內(nèi)表面峰值溫度平均降低了0.26℃~0.58℃,峰值熱流密度平均降低了1.28 W/m2~2.85W/m2,屋頂內(nèi)表面溫度與室外溫度、太陽輻射等參數(shù)的相關(guān)性系數(shù)降低了4.36%~50.48%。充分證明了節(jié)能屋頂既具有良好的隔熱效果,又具有良好的效屏蔽外界環(huán)境影響的能力。為彌補實驗的局限性,指導(dǎo)節(jié)能屋頂?shù)脑O(shè)計和研究工作,本文基于Trnsys建立了節(jié)能屋頂?shù)膫鳠崮Ｐ汀Ｍㄟ^與實驗結(jié)果進行誤差分析和B-A一致性分析,發(fā)現(xiàn)模擬值和實測值一致性吻合程度在91.94%~97.22%之間,證明了所建立的模型具有較高的準確性。最后,利用所建立的模型模擬了普通屋頂?shù)膫鳠釥顩r,通過與實驗房間的實測結(jié)果對比,發(fā)現(xiàn)節(jié)能屋頂日傳熱量較普通屋頂平均降低了17.89%。
[Abstract]:The application of phase change material and reflective heat insulation coating in the field of building can effectively reduce building energy consumption and improve indoor thermal comfort. The purpose of this paper is to study a kind of energy-saving roof which integrates phase change material and reflective heat insulation coating. Including the preparation and packaging of phase change materials, the design and construction of roofs, In this paper, the heat insulation principle of energy-saving roof is first expounded. According to the relevant specifications, appropriate reflective heat insulation coatings are selected, and high fatty acids and high carbon alcohols are used as raw materials. A suitable phase change material was prepared by low eutectic mixing principle and DSC test. In order to meet the requirements of phase change material, a PE-RT tube was designed. According to the heat insulation principle of energy-saving roof, the design and construction method of roof is determined. The roof is divided from inside to outside in order of base layer, waterproof layer, bonded mortar layer, phase change layer, etc. Anti-cracking mortar and reflective coatings. In order to test and analyze the performance of energy-saving roofs, three full-size experimental rooms were built on the 1 #PCM roof and the #2 #2CR roof and the PCR roof. Under the condition of closed doors and windows (reducing external interference factors), The outdoor climatic parameters, roof temperature and heat flux were measured respectively. The results showed that the peak temperature of the interior surface of the energy-saving roof was 0.26 鈩，

本文編號：1565582