热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2015年
1期
91-95
,共5页
凝汽器%旋流通风%喷雾增湿%空冷单元%机械通风%数值模拟
凝汽器%鏇流通風%噴霧增濕%空冷單元%機械通風%數值模擬
응기기%선류통풍%분무증습%공랭단원%궤계통풍%수치모의
condenser%swirling ventilation%spray humidification%air-cooled unit%mechanical ventilation%nu-merical simulation
大多数北方电厂夏季通常在空冷单元内部加装喷雾增湿系统，存在空冷单元下部局部温度偏高，使喷雾效果欠佳等问题。对此，基于电厂实际数据，对某600 MW机组空冷单元喷雾增湿系统建立三维模型，模拟喷雾增湿系统分别在空冷单元传统机械通风方式和旋流通风方式下对空冷单元换热的影响。结果表明，旋流通风下的喷雾增湿效果明显优于传统机械通风方式。
大多數北方電廠夏季通常在空冷單元內部加裝噴霧增濕繫統，存在空冷單元下部跼部溫度偏高，使噴霧效果欠佳等問題。對此，基于電廠實際數據，對某600 MW機組空冷單元噴霧增濕繫統建立三維模型，模擬噴霧增濕繫統分彆在空冷單元傳統機械通風方式和鏇流通風方式下對空冷單元換熱的影響。結果錶明，鏇流通風下的噴霧增濕效果明顯優于傳統機械通風方式。
대다수북방전엄하계통상재공랭단원내부가장분무증습계통，존재공랭단원하부국부온도편고，사분무효과흠가등문제。대차，기우전엄실제수거，대모600 MW궤조공랭단원분무증습계통건립삼유모형，모의분무증습계통분별재공랭단원전통궤계통풍방식화선류통풍방식하대공랭단원환열적영향。결과표명，선류통풍하적분무증습효과명현우우전통궤계통풍방식。
In summer,installing the spray humidification system in air-cooled condenser unit has become se-lection of the most power plants in northern China.However,some problems still exist,like local high tem-perature at the bottom of air-cooled unit,which causes poor effect of the spray.Thus,on the basis of the ac-tual operation data,a three-dimensional model for a 600 MW unit was established.Through changing the conventional mechanical ventilation method to swirling ventilation,the effect of spray humidification sys-tem on heat transfer characteristics of air-cooled unit under swirling ventilation with straight blade was simulated.The result shows that the effect of spray humidification under swirling ventilation is obviously better than that under the conventional mechanical ventilation.
