板翅式換熱器物流分配對天然氣液化性能的影響
發(fā)布時間：2018-07-16 20:47
【摘要】：板翅式換熱器入口物流分配不均是造成換熱效能降低的主要因素之一,對天然氣液化裝置穩(wěn)定和高效的運行產(chǎn)生不利的影響。針對氮氣膨脹和混合制冷劑兩種天然氣液化工藝,分別研究原料氣、氮氣制冷劑和混合制冷劑物流分配不均對換熱器參數(shù)和液化工藝性能的影響,得到換熱器入口物流分配不均勻度STD(standard deviation,均方差)的臨界值,為換熱器的選型和天然氣液化工藝的設計提供依據(jù)。結果表明:相同STD值下,天然氣液化性能受不同物流分配不均影響程度大小依次為氮氣制冷劑、混合制冷劑和原料氣;傾斜嚴重影響混合制冷劑的分配及換熱效果,傾斜角度由0°增加至20°時,液相STD值由1.3增至3.9,天然氣液化率從92.8%降至69.4%;為滿足天然氣液化率在90%以上,原料氣、氮氣制冷劑及混合制冷劑物流分配的臨界STD值分別為8.3、2.8、4.5(液相),混合制冷劑傾斜工況臨界STD值為1.5(液相),對應傾斜角度為1.6°。
[Abstract]:The uneven distribution of inlet material flow in plate-fin heat exchangers is one of the main factors leading to the decrease of heat transfer efficiency, which has adverse effects on the stable and efficient operation of natural gas liquefaction units. The effects of raw gas, nitrogen refrigerant and mixed refrigerant on the parameters of heat exchanger and the performance of liquefaction process were studied respectively in view of the nitrogen expansion and mixed refrigerant liquefaction processes, and the effects of raw gas, nitrogen refrigerant and mixed refrigerant on the parameters of heat exchanger and liquefaction process were studied. The critical value of inhomogeneity in inlet distribution of heat exchanger (STD (standard deviation, RMS) is obtained, which provides the basis for the selection of heat exchanger and the design of natural gas liquefaction process. The results show that under the same STD value, the degree of natural gas liquefaction affected by the uneven distribution of different logistics is nitrogen refrigerant, mixed refrigerant and feedstock gas, and the inclination seriously affects the distribution and heat transfer effect of mixed refrigerant. When the inclination angle is increased from 0 擄to 20 擄, the STD value of liquid phase increases from 1.3 to 3.9, and the liquefaction rate of natural gas decreases from 92.8% to 69.4%. The critical STD value of nitrogen refrigerant and mixed refrigerant is 8.3N 2.84.5 (liquid phase), and the critical STD value of mixed refrigerant is 1.5 (liquid phase). The angle of inclination is 1.6 擄.
【作者單位】： 中國石油大學(華東)儲運與建筑工程學院山東省油氣儲運安全省級重點實驗室青島市環(huán)海油氣儲運技術重點實驗室;中國寰球工程公司;
【基金】：國家自然科學基金(51504278) 山東省優(yōu)秀中青年科學家科研獎勵基金(BS2014ZZ009) 青島市應用基礎研究計劃(14-2-4-81-jch)資助
【分類號】：TE646;TK172
，
本文編號：2127626
[Abstract]:The uneven distribution of inlet material flow in plate-fin heat exchangers is one of the main factors leading to the decrease of heat transfer efficiency, which has adverse effects on the stable and efficient operation of natural gas liquefaction units. The effects of raw gas, nitrogen refrigerant and mixed refrigerant on the parameters of heat exchanger and the performance of liquefaction process were studied respectively in view of the nitrogen expansion and mixed refrigerant liquefaction processes, and the effects of raw gas, nitrogen refrigerant and mixed refrigerant on the parameters of heat exchanger and liquefaction process were studied. The critical value of inhomogeneity in inlet distribution of heat exchanger (STD (standard deviation, RMS) is obtained, which provides the basis for the selection of heat exchanger and the design of natural gas liquefaction process. The results show that under the same STD value, the degree of natural gas liquefaction affected by the uneven distribution of different logistics is nitrogen refrigerant, mixed refrigerant and feedstock gas, and the inclination seriously affects the distribution and heat transfer effect of mixed refrigerant. When the inclination angle is increased from 0 擄to 20 擄, the STD value of liquid phase increases from 1.3 to 3.9, and the liquefaction rate of natural gas decreases from 92.8% to 69.4%. The critical STD value of nitrogen refrigerant and mixed refrigerant is 8.3N 2.84.5 (liquid phase), and the critical STD value of mixed refrigerant is 1.5 (liquid phase). The angle of inclination is 1.6 擄.
【作者單位】： 中國石油大學(華東)儲運與建筑工程學院山東省油氣儲運安全省級重點實驗室青島市環(huán)海油氣儲運技術重點實驗室;中國寰球工程公司;
【基金】：國家自然科學基金(51504278) 山東省優(yōu)秀中青年科學家科研獎勵基金(BS2014ZZ009) 青島市應用基礎研究計劃(14-2-4-81-jch)資助
【分類號】：TE646;TK172
，
本文編號：2127626
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