水冷壁設(shè)計(jì)計(jì)算明細(xì)表,,,,,,,,,

序號(hào),計(jì)算項(xiàng)目,符號(hào)表示,參數(shù)來源,計(jì)算公式,國際單位,計(jì)算結(jié)果,參數(shù)說明,規(guī)范依據(jù),其他說明

一,基本參數(shù),,,,,,,,

1,額定工作壓力,P,參數(shù)輸入,P=設(shè)計(jì)值,MPa,9.8,鍋爐額定工作壓力,設(shè)計(jì)任務(wù)書,表壓

2,計(jì)算壓力,Pc,計(jì)算值,Pc=P+0.05×P,MPa,10.29,考慮安全系數(shù)的計(jì)算壓力,GB/T9222-2019,

3,介質(zhì)溫度,t,參數(shù)輸入,t=設(shè)計(jì)值,℃,540,額定蒸汽溫度,設(shè)計(jì)任務(wù)書,

4,設(shè)計(jì)溫度,td,計(jì)算值,td=t+20,℃,560,考慮溫度裕度的設(shè)計(jì)溫度,GB/T9222-2019,溫度裕度20℃

5,水冷壁管外徑,d,參數(shù)輸入,d=設(shè)計(jì)值,mm,60,膜式水冷壁管外徑,設(shè)計(jì)規(guī)范,

6,管子壁厚,δ,參數(shù)輸入,δ=設(shè)計(jì)值,mm,7,水冷壁管設(shè)計(jì)壁厚,強(qiáng)度計(jì)算,

7,有效壁厚,δe,計(jì)算值,δe=δ-C,mm,6.5,考慮腐蝕裕量的有效壁厚,GB/T9222-2019,C=0.5mm腐蝕裕量

二,材料性能,,,,,,,,

8,材料牌號(hào),材料,選用值,20G,-,20G,優(yōu)質(zhì)碳素結(jié)構(gòu)鋼,GB/T8162-2018,

9,常溫抗拉強(qiáng)度,Rm,查表值,Rm=410,MPa,410,材料常溫抗拉強(qiáng)度,材料手冊(cè),20G鋼材性能

10,設(shè)計(jì)溫度下屈服強(qiáng)度,Rp0.2,查表值,Rp0.2=170,MPa,170,560℃下屈服強(qiáng)度,材料手冊(cè),高溫性能數(shù)據(jù)

11,設(shè)計(jì)溫度下持久強(qiáng)度,RD,查表值,RD=80,MPa,80,10^5h持久強(qiáng)度,材料手冊(cè),長期強(qiáng)度

12,許用應(yīng)力,[σ],計(jì)算值,"[σ]=MIN(Rm/2.7,Rp0.2/1.5,RD/1.5)",MPa,53.33,綜合許用應(yīng)力,TSGG0001-2012,取最小值

三,強(qiáng)度計(jì)算,,,,,,,,

13,周向應(yīng)力,σθ,計(jì)算值,σθ=Pc×d/(2×δe),MPa,47.49,管子周向應(yīng)力,GB/T9222-2019,薄壁圓筒公式

14,軸向應(yīng)力,σz,計(jì)算值,σz=σθ/2,MPa,23.75,管子軸向應(yīng)力,彈性力學(xué),

15,徑向應(yīng)力,σr,計(jì)算值,σr=-Pc,MPa,-10.29,管子徑向應(yīng)力,彈性力學(xué),內(nèi)壁壓力

16,當(dāng)量應(yīng)力,σeq,計(jì)算值,σeq=√[(σθ-σz)2+(σz-σr)2+(σr-σθ)2]/√2,MPa,50.30,第四強(qiáng)度理論當(dāng)量應(yīng)力,GB/T9222-2019,

17,應(yīng)力強(qiáng)度比,S,計(jì)算值,S=σeq/[σ],-,0.94,應(yīng)力強(qiáng)度安全系數(shù),GB/T9222-2019,

18,強(qiáng)度校核結(jié)果,Result,判斷值,"IF(S≤1.0,""滿足"",""不滿足"")",-,滿足,強(qiáng)度校核通過,GB/T9222-2019,S≤1.0為合格

四,穩(wěn)定性計(jì)算,,,,,,,,

19,管子長細(xì)比,λ,計(jì)算值,λ=L/i,-,80,管子細(xì)長比,GB/T9222-2019,i=37.5mm慣性半徑

20,臨界應(yīng)力,σcr,計(jì)算值,σcr=π2E/λ2,MPa,277.58,壓桿穩(wěn)定臨界應(yīng)力,材料力學(xué),E=1.8×10^5MPa

21,穩(wěn)定性安全系數(shù),n,計(jì)算值,n=σcr/σz,-,11.69,穩(wěn)定性安全系數(shù),GB/T9222-2019,

22,穩(wěn)定性校核結(jié)果,Result,判斷值,"IF(n≥2.5,""滿足"",""不滿足"")",-,滿足,穩(wěn)定性校核通過,GB/T9222-2019,n≥2.5為合格

五,熱負(fù)荷計(jì)算,,,,,,,,

23,爐膛熱負(fù)荷,qF,參數(shù)輸入,qF=設(shè)計(jì)值,kW/m2,1400,爐膛平均熱負(fù)荷,鍋爐設(shè)計(jì)手冊(cè),

24,管壁熱流密度,q,計(jì)算值,q=qF×(s-d)/s,kW/m2,350,水冷壁管熱流密度,傳熱學(xué),考慮鰭片影響

25,管壁溫度,tw,計(jì)算值,tw=t+q×δ/(λ×1000),℃,540.05,管壁平均溫度,傳熱學(xué),λ=45W/(m·K)導(dǎo)熱系數(shù)

26,溫度校核結(jié)果,Result,判斷值,"IF(tw≤580,""滿足"",""不滿足"")",℃,滿足,溫度校核通過,材料手冊(cè),20G允許溫度580℃

六,水循環(huán)計(jì)算,,,,,,,,

27,上升管內(nèi)徑,di,計(jì)算值,di=d-2δ,mm,46,管子內(nèi)徑,結(jié)構(gòu)尺寸,

28,上升管流通面積,A,計(jì)算值,A=π×di2/4,m2,0.001661903,單管流通面積,幾何計(jì)算,單位轉(zhuǎn)換為m2

29,質(zhì)量流量,G,計(jì)算值,G=D×1000/n,kg/h,10000,單管質(zhì)量流量,水循環(huán)計(jì)算,

30,質(zhì)量流速,ρw,計(jì)算值,ρw=G/(A×3600),kg/(m2·s),1671.44,管內(nèi)質(zhì)量流速,水循環(huán)計(jì)算,

31,臨界質(zhì)量流速,"ρw,cr",查表值,"ρw,cr=1200",kg/(m2·s),1200,臨界質(zhì)量流速,水循環(huán)手冊(cè),防止膜態(tài)沸騰

32,水循環(huán)校核結(jié)果,Result,判斷值,"IF(ρw≥ρw,cr,""滿足"",""不滿足"")",-,滿足,水循環(huán)可靠,水循環(huán)手冊(cè),實(shí)際流速≥臨界流速

七,疲勞強(qiáng)度計(jì)算,,,,,,,,

33,壓力波動(dòng)幅度,ΔP,設(shè)計(jì)值,ΔP=0.5,MPa,0.5,壓力波動(dòng)范圍,運(yùn)行經(jīng)驗(yàn),正常運(yùn)行波動(dòng)

34,應(yīng)力幅,Δσ,計(jì)算值,Δσ=ΔP×d/(2×δe),MPa,2.31,應(yīng)力變化幅度,疲勞強(qiáng)度理論,

35,疲勞壽命,N,計(jì)算值,N=10^7×(Δσ/200)^(-6),次,4.23753E+18,預(yù)期疲勞壽命,疲勞設(shè)計(jì)規(guī)范,

36,疲勞校核結(jié)果,Result,判斷值,"IF(N≥10^6,""滿足"",""不滿足"")",次,滿足,疲勞強(qiáng)度足夠,ASMEBPVC,壽命≥10^6次

八,總體評(píng)價(jià),,,,,,,,

37,綜合評(píng)價(jià),Evaluation,判斷值,"IF(AND(強(qiáng)度滿足,穩(wěn)定性滿足,溫度滿足,水循環(huán)滿足,疲勞滿足),""合格"",""不合格"")",-,合格,設(shè)計(jì)滿足要求,綜合分析,所有