列管式換熱器-換熱面積計(jì)算

換熱面積計(jì)算<化工工藝設(shè)計(jì)手冊(cè)第一冊(cè)><化工計(jì)算手冊(cè)第三冊(cè)>,,,,,

名稱及單位,代號(hào),數(shù)據(jù),,,

（1）確定物理常數(shù),,,,,

管程（介質(zhì)：水）冷介質(zhì),,,,,

水進(jìn)口溫度℃,t1,50,輸入,,

水出口溫度℃,t2,80,輸入,,

水平均溫度℃,t,65,輸出,,

密度kg/m3,ρ水,1000,輸入,,

粘度Pa*s,μ水,0.0005494,輸入,,

水的比熱容J/(kg.℃),C水,4180,輸入,,

導(dǎo)熱系數(shù)W/(m*℃),λ水,6478,輸入,,

殼程（介質(zhì)：水蒸汽）熱介質(zhì),,,,,

蒸汽入口溫度℃,T1,125,輸入,,

蒸汽出口溫度℃,T2,90,輸入,,

蒸汽平均溫度℃,T,107.5,輸出,,

密度kg/m3,ρ氣,0.13,輸入,,

粘度Pa*s,μ氣,0.0005494,輸入,0.0004688,

水的比熱容J/(kg.℃),C氣,4180,輸入,,

導(dǎo)熱系數(shù)W/(m*℃),λ氣,6478,輸入,6594蒸汽導(dǎo)熱系數(shù),

（2）計(jì)算對(duì)數(shù)平均溫差,,,,,

對(duì)數(shù)平均溫度差，℃,△tlm,42.45093508,輸出,,

(T1-T1)/(t2-t1),R,1.166666667,輸出,,

(t2-t1)/(T1-t1),S,0.4,輸出,,

"傳熱量(1W=1J/s),J/s",Q,1393333.333,輸出,,

溫差修正系數(shù),Ft,0.9,按圖15-14,,

總傳熱系數(shù)W/(m2*K),K,3012.17,輸入,傳熱系數(shù)：1000-3400kcal/(m2*h*℃),1kcal/m2*h*℃=1.163W/(m2*K)

平均溫差,△tm,38.20584157,,,

（3）計(jì)算蒸汽用量,,,,,

水流量kg/s,W水,11.11111111,輸出,冷介質(zhì)（管程）,

水流量t/h,,40,輸入,,

蒸汽流量kg/s,W氣,9.523809524,輸出,熱介質(zhì)（殼程）,

蒸汽流量t/h,,34.28571429,輸出,,

（4）換熱面積計(jì)算,,,,,

"換熱面積,m2",A,12.10725746,輸出,,

（5）確定換熱器參數(shù),,,,,

換熱管外徑m,Do,0.025,輸入,,

換熱管壁厚m,δ,0.0015,輸入,,

換熱管內(nèi)徑m,di,0.022,輸出,,

管心距m,Pτ,0.032,輸入,,

三角形不管m,,0.024,輸入,,

擋板間距m,,0.25,輸入,,

換熱管長(zhǎng)度m,L,10,輸出,,

換熱管根數(shù),Nτ,15.41543898,輸出,,

換熱管配置角度對(duì)換熱器直徑影響系數(shù),CL,1,輸入,,

傳熱程數(shù)對(duì)換熱器直徑的影響系數(shù),CTP,0.93,輸入,,

當(dāng)量直徑,De,0.019850627,,,

筒徑直徑,Ds,0.147095986,,,

工藝筒徑,,0.6,輸出,