山东大学学报（工学版）
山東大學學報（工學版）
산동대학학보（공학판）
JOURNAL OF SHANDONG UNIVERSITY(ENGINEERING SCIENCE)
2014年
1期
90-94
,共5页
真空度%强化传热%换热管束%凝结传热系数%总体传热系数
真空度%彊化傳熱%換熱管束%凝結傳熱繫數%總體傳熱繫數
진공도%강화전열%환열관속%응결전열계수%총체전열계수
vacuum%heat transfer enhancement%tube bundles%condensation heat transfer coefficient%overall heat transfer coefficient
为了探究在真空条件下材料表面特性对蒸汽凝结换热的影响机理，从实验和凝结理论两个方面入手探索了在真空条件下渗层不锈钢管束壁面蒸汽凝结的换热特性。在真空条件下进行对比实验，实验结果表明，渗层不锈钢管束的凝结换热性能明显优于普通铜管束，且随着真空的提高，效果更为显著，最高提升幅度可达77％。进而从真空对蒸汽的流场、非冷凝气体的热阻及其固相和液相间的界面能差三个部分论证了真空度的提升有利于冷凝液滴的形成和凝结换热效果的提升，与实验结果相符。
為瞭探究在真空條件下材料錶麵特性對蒸汽凝結換熱的影響機理，從實驗和凝結理論兩箇方麵入手探索瞭在真空條件下滲層不鏽鋼管束壁麵蒸汽凝結的換熱特性。在真空條件下進行對比實驗，實驗結果錶明，滲層不鏽鋼管束的凝結換熱性能明顯優于普通銅管束，且隨著真空的提高，效果更為顯著，最高提升幅度可達77％。進而從真空對蒸汽的流場、非冷凝氣體的熱阻及其固相和液相間的界麵能差三箇部分論證瞭真空度的提升有利于冷凝液滴的形成和凝結換熱效果的提升，與實驗結果相符。
위료탐구재진공조건하재료표면특성대증기응결환열적영향궤리，종실험화응결이론량개방면입수탐색료재진공조건하삼층불수강관속벽면증기응결적환열특성。재진공조건하진행대비실험，실험결과표명，삼층불수강관속적응결환열성능명현우우보통동관속，차수착진공적제고，효과경위현저，최고제승폭도가체77％。진이종진공대증기적류장、비냉응기체적열조급기고상화액상간적계면능차삼개부분론증료진공도적제승유리우냉응액적적형성화응결환열효과적제승，여실험결과상부。
The steam condensation heat transfer characteristics of Nickel based implanted tube bundle was studied though comparative experiments and theoretical analysis for exploring effect mechanism on steam condensation heat transfer by surface material characteristics.The results showed that the Nickel based implanted tube bundle had a better performance than common copper tube, especially in a higher vacuum state, the maximum enhance rate was up to 77%.The theo-retical research was carried on by analyzing the flow of steam, non-condensed gas thermal resistance and solid-liquid in-terfacial energy, it turned out that dropwise condensation was easily generated under lower pressure and its heat transfer coefficient increased with a rising vacuum, consistent with the subsequent experimental results.
