槽式太陽能熱發(fā)電導熱油傳輸系統(tǒng)防凝方案研究
發(fā)布時間:2019-03-21 13:17
【摘要】:太陽能熱發(fā)電是解決當前能源枯竭和環(huán)境污染的一種有效途徑和方法,在國外歐美地區(qū)得到了快速發(fā)展,正處于商業(yè)化成長期。隨著建設資源節(jié)約、環(huán)境友好型社會目標的提出,我國也將進入一個太陽能熱發(fā)電的發(fā)展時期。槽式太陽能熱發(fā)電是目前技術最成熟、商業(yè)化程度最高的電站,世界上大部分的槽式太陽能熱發(fā)電站廣泛采用導熱油作為傳熱工質,導熱油會在12℃凝固。與國外太陽能熱發(fā)電站的廠址環(huán)境相比,我國適宜建太陽能熱發(fā)電站的地區(qū)環(huán)境溫度更低,風速更大,特別是冬季夜間和陰雨天,導熱油傳輸系統(tǒng)散熱損失尤其的大,若導熱油凝固,會影響整個電站的運行安全性。因此,研究槽式太陽能熱發(fā)電站導熱油傳輸系統(tǒng)的防凝具有重要的工程實用價值。 本文基于50MW槽式太陽能熱發(fā)電站典型集熱系統(tǒng)和我國即將建設的某50MW槽式太陽能熱發(fā)電站建設地典型年的實際天氣條件,確立了機組運行工況的時間樣本模型。在此基礎上,基于能量守恒原理、工質狀態(tài)方程和傳熱方程,建立了槽式太陽能熱發(fā)電導熱油傳輸系統(tǒng)的數(shù)學模型,提出了導熱油傳輸系統(tǒng)散熱損失的計算方法。 根據槽式太陽能熱發(fā)電導熱油傳輸系統(tǒng)的工作原理,確立了導熱油傳輸系統(tǒng)的防凝模式,并基于導熱油傳輸系統(tǒng)傳統(tǒng)保溫(巖棉保溫層)和真空傳輸管保溫兩種方案,分析了導熱油傳輸系統(tǒng)在不同防凝模式下的散熱損失,得到了不同季節(jié)較佳的防凝系統(tǒng)運行模式,同時定量分析了真空傳輸管保溫方案的經濟性。論文結論對槽式太陽能熱發(fā)電導熱油傳輸系統(tǒng)回路的設計、運行和控制策略的選取有一定的指導意義。
[Abstract]:Solar thermal power generation is an effective way and method to solve the problem of energy depletion and environmental pollution. It has been developed rapidly in Europe and the United States and is being commercialized for a long time. With the development of resource-saving and environment-friendly society, China will enter a developing period of solar thermal power generation. Trough solar thermal power generation is the most mature and commercialized power station at present. Heat conduction oil is widely used as heat transfer medium in most of the world's trough solar thermal power plants, and the heat conduction oil will solidify at 12 鈩,
本文編號:2444967
[Abstract]:Solar thermal power generation is an effective way and method to solve the problem of energy depletion and environmental pollution. It has been developed rapidly in Europe and the United States and is being commercialized for a long time. With the development of resource-saving and environment-friendly society, China will enter a developing period of solar thermal power generation. Trough solar thermal power generation is the most mature and commercialized power station at present. Heat conduction oil is widely used as heat transfer medium in most of the world's trough solar thermal power plants, and the heat conduction oil will solidify at 12 鈩,
本文編號:2444967
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