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<div class="left2"> <div class="left2top"> </div> <div class="left2_main"> <div id="printableview" class="n_info_con"> <h1>冷庫保溫材料有哪些？哪些保溫性能好？</h1> <div class="info_con_tit"> <div class="n_tit"> <span>文章出處：晨遠環保</span> <span>作者：晨遠環保</span> <span>人氣： 461 次 </span> <span>時間：2020-02-16 【<a onclick="ChangeFontSize(this,'16px')" href="javascript:;">大</a> <a onclick="ChangeFontSize(this,'14px')" href="javascript:;" class="cur">中</a> <a onclick="ChangeFontSize(this,'12px')" href="javascript:;">小</a>】</span> </div> </div> <div id="cntrBody"> <div> 冷庫保溫設計主要是為了阻止外界的熱量滲人到冷庫內，除了制冷系統設計外，隔熱設計是冷庫的生命。冷庫圍護結構、保溫層的傳熱量占冷庫總熱負荷的20％一35％．所以減少圍護結構的熱負荷可以達到節能的目的。冷庫通過圍護結構的耗冷量與圍護結構單位熱流量成正比。要降低圍護結構單位熱流量，一是選擇熱導率小的保溫材料，二是增加保溫層的厚度。而厚度又不宜太厚，否則會出現增加建造成本和減少使用空間等問題。因此，要在合適的厚度范圍內選取保溫材料。隔熱材料的選擇上，應考慮其導熱系數小、吸濕性小之外，還應考慮造價。那么<a href="http://www.zayncgw.com/lkbwsg/"><strong>冷庫保溫材料</strong></a>有哪些？哪些保溫性能好？<a href="/"><strong>濰坊晨遠環保聚氨酯保溫材料</strong></a>小編來詳細分析分析。</div> <div> 80年代以前，冷庫常用的隔熱材料有稻殼、軟木、爐渣和膨脹珍珠巖等，80年代后，新型保溫材料迅速發展，巖棉、玻璃棉、聚苯乙烯泡沫塑料(EPS、XeS)和聚氨酯泡沫塑料等越來越廣泛使用，施工方法也多種多樣。目前冷庫保溫廣泛使用的材料主要有聚苯乙烯泡沫塑料、擠塑聚苯乙烯泡沫塑料和<strong>聚氨酯噴涂施工</strong>。</div> <div> 1 聚苯乙烯泡沫塑料(EPS)</div> <div> 聚苯乙烯泡沫塑料的導熱系數低，吸水性較高，但因其價格低廉，保溫性能相對較好，是目前用得較多的保溫材料之一。用這種材料制成的復合夾芯板已被廣泛應用于現代冷庫中，特別是高溫冷藏庫中。聚苯乙烯泡沫塑料用于冷庫保溫需滿足要求。</div> <div> </div> <div> 2 擠塑聚苯乙烯泡沫塑料(XPS)</div> <div> 擠塑聚苯乙烯具有致密的表層及閉孑L結構內層，其導熱系數大大低于同厚度的聚苯乙烯，具有更好的保溫性能；由于其內層的閉孔結構，其抗濕性較好，在潮濕的環境中仍能保持良好的隔熱性能。</div> <div> 擠塑聚苯乙烯具有獨特的堅硬緊密的晶體結構，它的抗壓強度高、抗水蒸汽滲透性能強，性能穩定，使用年限持久，因此被國際上認為是用于冷庫隔熱工程中的理想材料；因其壓縮強度高，價格適中等優點，目前是我國冷庫地坪保溫材料的首選。擠塑聚苯乙烯泡沫塑料用于絕熱工程應滿足要求。</div> <div> </div> <div> 3 聚氨酯泡沫塑料(PU)</div> <div> 聚氨酯泡沫塑料的氣泡結構屬于閉孔泡沫材料，幾乎全部不連通，在常溫下，其靜態吸水率很低。在各種保溫材料中，硬質聚氨酯泡沫塑料因其導熱系數小、吸水率低、壓縮強度大、耐久性能高等優點，而成為冷庫保溫材料的首選。缺點是材料價格相對較高，但從全面權衡其經濟性后可以發現，用聚氨酯隔熱材料其綜合運行成本并不高。<br /> <img alt="冷庫保溫施工" src="/uploads/200210/1-200210160PD55.jpg" style="width: 420px; height: 315px;" /></div> <div> 聚氨酯用于冷庫保溫，有聚氨酯現場噴涂施工和聚氨酯冷庫板兩種形式。前者采用聚氨酯現場分層噴涂，可達到全封閉無接縫、與底物粘結力強的效果，保溫效果較好，但需做防潮層及防護層。防潮層可用新型高分子防水涂料，飭護層可用土建形式或用金屬板圍護，施工周期長，且施工復雜。采用聚氨酯冷庫板則剛性好，強度高，結構緊湊，可無需做防潮層，但須做好接縫處的密封；安裝快捷，現場施工周期短，施工簡單，冷庫內美觀衛生。</div> <div> 以上產品，不僅可單獨使用，也可根據具體情況組合使用。聚氨酯泡沫材料更適于做冷庫的墻、頂保溫隔熱材料．保溫性能及耐久性優于其他材料；擠塑聚苯乙烯泡沫塑料做冷庫地面保溫較理想，其保溫性能、抗壓性能更優。因此。在選擇保溫材料時，不僅要選擇材質，還要進行綜合分析，為業主選擇材料提供正確依據。</div> <div> 保溫材料的生產廠家很多，但產品質量卻參差不齊，因此冷庫施工中應選擇質優、信譽好的廠家，同時還應對施工中使用的保溫材料進行抽查檢測，確保質量合格。濰坊晨遠環?？萍加邢薰緦Ｗ⒕郯滨ケ夭牧系难邪l及工程施工。</div> <div> <img alt="冷庫聚氨酯噴涂" src="/uploads/200210/1-200210104I6454.jpg" style="width: 420px; height: 315px;" /></div> <div> 4 保溫層厚度的確定</div> <div> 冷庫保溫層的優化設計，不僅是材料的選擇，保溫層厚度的確定對阻止熱傳導也是至關重要的。圍護結構熱負荷與保溫層厚度成反比，增加保溫層厚度將減少冷庫的運行費用，但會增加初投資成本，因此需在冷庫建設時根據冷庫使用年限確定最佳經濟厚度。經濟厚度是指為獲得最佳經濟效果，使隔熱層的初投資、經營管理費月之和食品干耗損失費用之和為最小時的保溫層厚度。當防結露厚度比經濟厚度大時，取防結露厚度作為最小保冷厚度；當經濟厚度比防結露厚度大時，則取經濟厚度作為最小保冷厚度。</div> <div> </div> <div> 5 結論</div> <div> 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