热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
5期
83-86
,共4页
龙国庆%汤东升%何辉%杨志%石磊
龍國慶%湯東升%何輝%楊誌%石磊
룡국경%탕동승%하휘%양지%석뢰
300 MW机组%辅机%干冷塔%间接空冷散热器%性能%数值模拟%风向%优化设计
300 MW機組%輔機%榦冷塔%間接空冷散熱器%性能%數值模擬%風嚮%優化設計
300 MW궤조%보궤%간랭탑%간접공랭산열기%성능%수치모의%풍향%우화설계
300 MW unit%power plant auxiliaries%dry cooling tower%indirect air cooled radiator%numeral simulation%air direction%optimal design
采用计算传热学(NHT)软件 Fluent,对某台300 MW机组辅机干冷塔新型间接空冷散热器设计工况下的流动和换热性能进行了数值模拟、分析和研究.结果表明：当风机转速为100％时、90°风向下,间接空冷散热器的性能最好,达到了设计值,且45°风向时散热器换热不佳,热风回流现象是影响散热器换热性能的主要因素；当风机转速为110％时、90°风向下,间接空冷散热器的性能最好,达到了设计值,而在不同风向下其抗风能力较100％转速有所提高,热风回流的影响显著降低,22．5°为最不利风向.
採用計算傳熱學(NHT)軟件 Fluent,對某檯300 MW機組輔機榦冷塔新型間接空冷散熱器設計工況下的流動和換熱性能進行瞭數值模擬、分析和研究.結果錶明：噹風機轉速為100％時、90°風嚮下,間接空冷散熱器的性能最好,達到瞭設計值,且45°風嚮時散熱器換熱不佳,熱風迴流現象是影響散熱器換熱性能的主要因素；噹風機轉速為110％時、90°風嚮下,間接空冷散熱器的性能最好,達到瞭設計值,而在不同風嚮下其抗風能力較100％轉速有所提高,熱風迴流的影響顯著降低,22．5°為最不利風嚮.
채용계산전열학(NHT)연건 Fluent,대모태300 MW궤조보궤간랭탑신형간접공랭산열기설계공황하적류동화환열성능진행료수치모의、분석화연구.결과표명：당풍궤전속위100％시、90°풍향하,간접공랭산열기적성능최호,체도료설계치,차45°풍향시산열기환열불가,열풍회류현상시영향산열기환열성능적주요인소；당풍궤전속위110％시、90°풍향하,간접공랭산열기적성능최호,체도료설계치,이재불동풍향하기항풍능력교100％전속유소제고,열풍회류적영향현저강저,22．5°위최불리풍향.
By using the numerical heat transfer (NHT)software Fluent,numerical simulation on flow and heat transfer performance of the novel indirect air cooled radiator of dry cooling tower in a 300MW unit under design condition was conducted.The results show that,with the air fan speed of 100%,the indirect air cooled radicator exhibited the best performance in air direction of 90°,and the poorest in air direction of 45°;the hot air recirculation was the main factor affecting the heat transfer performance.With the air fan speed of 110%,the indirect air cooled radicatior exhibited the best performance in air direction of 90°,and its air resistance capability increased in other air directions;the effect of hot air recirculation significantly reduced;the radiator perform-ance was the worst in air direction of 22.5°.
