【摘要】：文章主要對我國北方地區(qū)火力發(fā)電廠直接空冷和間接空冷系統(tǒng)型式的選擇原則進行研究分析。針對影響空冷系統(tǒng)選擇的主要氣象參數(shù),通過具有代表性的工程實例,在不同環(huán)境溫度、不同環(huán)境風(fēng)速及不同海拔高度下,對空冷系統(tǒng)的背壓及配置規(guī)模變化規(guī)律進行了分析總結(jié);對ACC系統(tǒng)和ISC系統(tǒng)在技術(shù)方面進行了對比研究;最終歸納出在我國北方不同區(qū)域空冷系統(tǒng)的選擇原則。環(huán)境溫度對間接空冷系統(tǒng)背壓的影響較直接空冷系統(tǒng)明顯。隨著環(huán)境溫度的升高,間接空冷系統(tǒng)背壓較直接空冷系統(tǒng)背壓升高的快;隨著環(huán)境溫度的降低,間接空冷系統(tǒng)背壓較直接空冷系統(tǒng)背壓降低的快。環(huán)境風(fēng)速對直冷空冷系統(tǒng)背壓的影響較間接空冷系統(tǒng)明顯。在風(fēng)速超過3m/s時,直接空冷系統(tǒng)的背壓增加迅速;在風(fēng)速為3.0~9.0m/s范圍時,間接空冷系統(tǒng)的背壓增加不明顯,當(dāng)風(fēng)速超過9.0m/s時,需通過數(shù)模試驗進行分析。海拔高度對直冷空冷系統(tǒng)背壓的影響較間接空冷系統(tǒng)明顯。隨著海拔的升高,直接空冷系統(tǒng)背壓較間接空冷系統(tǒng)背壓升高的快。
[Abstract]:The selection principles of direct air cooling system and indirect air cooling system for thermal power plants in northern China are studied and analyzed in this paper. In view of the main meteorological parameters which affect the selection of air cooling system, through representative engineering examples, under different environmental temperature, different environmental wind speed and different altitude, The change law of back pressure and configuration scale of air cooling system is analyzed and summarized. This paper compares ACC system and ISC system in technical aspect and concludes the selection principle of air cooling system in different regions of northern China. The influence of ambient temperature on the backpressure of indirect air-cooling system is more obvious than that of direct air-cooling system. With the increase of ambient temperature, the backpressure of indirect air-cooling system increases faster than that of direct air-cooling system, and with the decrease of ambient temperature, the back pressure of indirect air-cooling system decreases faster than that of direct air-cooling system. The influence of ambient wind speed on the back pressure of direct cooling air-cooling system is more obvious than that of indirect air-cooling system. When the wind speed exceeds 3m/s, the back pressure of the direct air cooling system increases rapidly. When the wind speed is in the range of 3.0~9.0m/s, the back pressure of the indirect air-cooling system does not increase obviously. When the wind speed exceeds 9.0m/s, it needs to be analyzed by numerical simulation test. The influence of altitude on the back pressure of direct air cooling system is more obvious than that of indirect air cooling system. With the increase of altitude, the back pressure of direct air-cooling system increases faster than that of indirect air-cooling system.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM621

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