逆流開式冷卻塔熱力阻力計算書

冷卻塔熱力阻力計算書,,,,,,,,,,,,,,,

計算依據(jù)：GB/T50392-2006機(jī)械通風(fēng)冷卻塔工藝設(shè)計規(guī)范,,,,,,,,,,,,,,,

計算程序：EXCEL,,,冷卻塔型號：,,,,,,數(shù)據(jù)輸入：,,,,,,

設(shè)計參數(shù),,,,,,,,,,,,,,,

大氣壓,P,92.3,Kpa,風(fēng)筒底徑,6.66,m,單塔長度,10,m,,,,,,

干球溫度,θ,31.2,℃,風(fēng)筒頂徑,6.48,m,噴淋高度,0.5,m,,,,,,

濕球溫度,τ,20,℃,風(fēng)筒中徑,6.06,m,氣室高度,1.7,m,,,,,,

處理水量,Q,1300,m3/h,,,m,風(fēng)筒高度,2,m,,,,,,

進(jìn)水溫度,t1,31,℃,,,m,總高,10.45,m,,,,,,

出水溫度,t2,24,℃,,,,平臺高,8.45,m,,,,,,

風(fēng)機(jī)直徑,D,6,m,風(fēng)機(jī)數(shù)量,1,臺,噴頭個數(shù),144,個,,,,,,

輪轂直徑,d,1,m,填料高度,1.25,m,單個流量,9.027777778,m3/h,,,,,,

淋水面積,F,80,m2,,,,噴嘴壓力,0.03,Mpa,,,,,,

進(jìn)風(fēng)口高度,,5,m,,,,,,,,,,,,

熱力計算,,,,,,,,,,,,,,,

濕球絕對溫度：Tτ=273.16+τ=,,,,,293.16,,K,,,,,,,,

飽和水蒸汽壓的計算公式：,,,,,,,,,,,,,,,

"lgP""=2.0057173-3142.305/T+3142.305/373.16-0.0024804*373.16+0.0024804*T+8.2lg(373.16/T)",,,,,,,,,,,,,,,

"濕球溫度時的飽和水蒸汽壓對數(shù)：lgP""τ=",,,,,0.368627186,,,,,,,,,,

"濕球時飽和水蒸汽壓P""τ=",,,2.336830359,,Kpa,,,,,,,,,,

干球絕對溫度：Tθ=273.06+θ=,,,,,304.36,,K,,,,,,,,

"干球溫度時的飽和水蒸汽壓對數(shù)：lgP""θ=",,,,,0.657321946,,,,,,,,,,

"干球時飽和水蒸汽壓P""θ=",,,4.542782523,,Kpa,,,,,,,,,,

"空氣相對濕度φ=[P""τ-0.000662P（θ-τ）]/P""θ=",,,,,,,,0.363759707,,,,,,,

"進(jìn)塔干空氣密度ρ1=（P-φP""θ）*103/[287.14（273+θ）]=",,,,,,,,1.037774548,,kg/m3,,,,,

選用氣水比λ,,0.717,0.767,0.817,0.867,,0.917,,,,,,,,

風(fēng)量G,,898171.9602,960805.9881,1023440.016,1086074.044,,1148708.072,m3/h,,,,,,,

"進(jìn)塔濕空氣比焓：h1=1.005θ+0.622（2500.8+1.846θ）*φ*P""θ/（P-φ*P""θ）=",,,,,,,,,,60.36539241,KJ/kg(DA),,,,

蒸發(fā)帶走熱量系數(shù)：K=1-t2/[586-0.56(t2-20)]=,,,,,,,0.958887214,,,,,,,,

不同氣水比出塔濕空氣比焓：h2=h1+4.1868(t1-t2)/(Kλ)=,,,,,,,,,,,,,,,

,,102.9932565,100.2143866,97.77564766,95.61819349,,93.6960124,KJ/kg(DA),,,,,,,

進(jìn)水絕對溫度：T（t1)=273.16+t1=,,,,304.16,K,,,,,,,,,,

"進(jìn)水溫度時的飽和水蒸汽壓對數(shù)：lgP""t1=",,,,,0.652378037,,,,,,,,,,

"進(jìn)水時飽和水蒸汽壓P""t1=",,,4.491361758,Kpa,,,,,,,,,,,

"出塔飽和空氣比焓：h""2=",,,112.538457,KJ/kg(DA),,,,,,,,,,,

溫差分段數(shù)：n=,,8,一般水溫差＜15℃常取n=2就可以保證精度了,,,,,,,,,,,,

溫差等分值:δt=,,0.875,℃,,,,,,,,,,,,

δh=(h2-h1)/n=,,5.328483008,4.981124272,4.676281905,4.406600135,,4.166327499,,,,,,,,

t1-δt=,,30.125,℃,,,,,,,,,,,,

t1-2δt=,,29.25,℃,,,,,,,,,,,,

t1-3δt=,,28.375,℃,,,,,,,,,,,,

t1-4δt=,,27.5,℃,,,,,,,,,,,,

t1-5δt=,,26.625,℃,,,,,,,,,,,,

t1-6δt=,,25.75,℃,,,,,,,,,,,,

t1-7δt=,,24.875,℃,,,,,,,,,,,,

T1=273.16+t1-δt=,,,303.285,℃,,,,,,,,,,,

T2=273.16+t1-2δt=,,,302.41,℃,,,,,,,,,,,

T3=273.16+t1-3δt=,,,301.535,℃,,,,,,,,,,,

T4=273.16+t1-4δt=,,,300.66,℃,,,,,,,,,,,

T5=273.16+t1-5δt=,,,299.785,℃,,,,,,,,,,,

T6=273.16+t1-6δt=,,,298.91,℃,,,,,,,,,,,

T7=273.16+t1-7δt=,,,298.035,℃,,,,,,,,,,,

T(t2)=273.16+t2=,,,297.16,℃,,,,,,,,,,,

"T1溫度時的飽和水蒸汽壓對數(shù)：lgP""1=",,,,,0.630791522,,,,,,,,,,

"T1溫度時的飽和水蒸汽壓：P""1=",,,,,4.273576888,,Kpa,,,,,,,,

"T1溫度時飽和空氣焓：h""T1=",,,,,107.4724585,,KJ/kg(DA),,,,,,,,

"T2溫度時的飽和水蒸汽壓對數(shù)：lgP""2=",,,,,0.608931934,,,,,,,,,,

"T2溫度時的飽和水蒸汽壓：P""2=",,,,,4.063796335,,Kpa,,,,,,,,

"T2溫度時飽和空氣焓：h""T2=",,,,,102.5828627,,KJ/kg(DA),,,,,,,,

"T3溫度時的飽和水蒸汽壓對數(shù)：lgP""3=",,,,,0.586928177,,,,,,,,,,

"T3溫度時的飽和水蒸汽壓：P""3=",,,,,3.863030853,,Kpa,,,,,,,,

"T3溫度時飽和空氣焓：h""T3=",,,,,97.88599537,,KJ/kg(DA),,,,,,,,

"T4溫度時的飽和水蒸汽壓對數(shù)：lgP""4=",,,,,0.564778904,,,,,,,,,,

"T4溫度時的飽和水蒸汽壓：P""4=",,,,,3.670953672,,Kpa,,,,,,,,

"T4溫度時飽和空氣焓：h""T4=",,,,,93.3729815,,KJ/kg(DA),,,,,,,,

"T5溫度時的飽和水蒸汽壓對數(shù)：lgP""5=",,,,,0.542482753,,,,,,,,,,

"T5溫度時的飽和水蒸汽壓：P""5=",,,,,3.48724735,,Kpa,,,,,,,,

"T5溫度時飽和空氣焓：h""T5=",,,,,89.0353753,,KJ/kg(DA),,,,,,,,

"T6溫度時的飽和水蒸汽壓對數(shù)：lgP""6=",,,,,0.520038346,,,,,,,,,,

"T6溫度時的飽和水蒸汽壓：P""6=",,,,,3.311603601,,Kpa,,,,,,,,

"T6溫度時飽和空氣焓：h""T6=",,,,,84.8651354,,KJ/kg(DA),,,,,,,,

"T7溫度時的飽和水蒸汽壓對數(shù)：lgP""7=",,,,,0.497444288,,,,,,,,,,

"T7溫度時的飽和水蒸汽壓：P""7=",,,,,3.143723115,,Kpa,,,,,,,,

"T7溫度時飽和空氣焓：h""T7=",,,,,80.85460183,,KJ/kg(DA),,,,,,,,

"T(t2)溫度時的飽和水蒸汽壓對數(shù)：lgP""(t2)=",,,,,0.474699167,,,,,,,,,,

"T(t2)溫度時的飽和水蒸汽壓：P""(t2)=",,,,,2.983315382,,Kpa,,,,,,,,

"T(t2)溫度時飽和空氣焓：h""1=",,,,,76.99647455,,KJ/kg(DA),,,,,,,,

"理論冷卻數(shù)：N=4.1868(t1-t2)/(3n)*[1/(h""1-h2)+4/(h""T1-(h2-δh))+2/(h""T2-(h2-2δh))",,,,,,,,,,,,,,,`

"+4/(h""T3-(h2-3δh))+2/(h""T4-(h2-4δh))+4/(h""T5-(h2-5δh))",,,,,,,,,,,,,,,

"+2/(h""T6-(h2-6δh))+4/(h""T7-(h2-7δh))+1/(h""2-h1)]",,,,,,,,,,,,,,,

不同氣水比時N,,2.254409559,1.980674186,1.796947429,1.662749343,,1.558851636,,,,,,,,

S波填料設(shè)計，填料特性數(shù)Ω=2.12λ0.61,,,,,,,,,,,,,,,

填料特性數(shù)Ω,,1.730623298,1.803271143,1.874093763,1.943244783,,2.010856854,,,,,,,,

由上圖曲線可知，當(dāng)氣水比λ=,,,,0.817,時，Ω＞N,,,滿足,,,,,,,

設(shè)計容積散質(zhì)系數(shù)βxv=NQ/(KV)=,,,,24884.8534,kg/m3.h,,,,,,,,,,

"填料容積散質(zhì)系數(shù)β""xv=3710g0.584q0.355",,,,,,,,,,,,,,,

其中空氣重量風(fēng)速g=G*γ/3600/F=,,,,3.687847222,kg/m2.s,,,,,,,,,,

淋水密度q=Q/F=,,,16.25,m3/m2.h,,,,,,,,,,,

"填料容積散質(zhì)系數(shù)β""xv=",,,21390.56422,kg/m3.h,,,,,,,,,,,

"填料容積散質(zhì)系數(shù)β""xv＞設(shè)計容積散質(zhì)系數(shù)βxv",,,,,,,,不滿足,,,,,,,

結(jié)論：該逆流冷卻塔的熱力性能,,,,達(dá)不到,設(shè)計要求。,,,,,,,,,,

通風(fēng)阻力及風(fēng)機(jī)功率計算,,,,,,,,,,,,,,,

進(jìn)風(fēng)口面積,,,50,m2,進(jìn)風(fēng)口風(fēng)速(≤4.0m/s),,,,5.685777867,m/s,,,,,

配水設(shè)備氣流通過面積,,,72,m2,布水系統(tǒng)風(fēng)速,,,,3.948456852,m/s,,,,,

收水設(shè)備氣流通過面積,,,78.4,m2,收水段風(fēng)速,,,,3.626133844,m/s,,,,,

淋水填料空隙面積,,,72,m2,淋水段風(fēng)速,,,,3.948456852,m/s,,,,,

風(fēng)筒收縮后斷面積,,,27.489,m2,出風(fēng)口風(fēng)速,,,,10.34191471,m/s,,,,,

塔內(nèi)濕空氣密度γ=,,,1.050810664,kg/m3,進(jìn)風(fēng)口面積：淋水面積,,,,0.637755102,,,,,,

進(jìn)風(fēng)口阻力P1=0.55γV2/2,,,9.341937181,Pa,進(jìn)風(fēng)口高：填料徑深（h:L）,,,,1,,,,,,

填料氣流轉(zhuǎn)彎P2=0.5γV2/2,,,3.317449283,Pa,,,,,,,,,,,

填料進(jìn)口突然收縮P3=,,,0.0008497,Pa,,,,,,,,,,,

淋水填料,A=,2.14,,,,,,,,,,,,,

,m=,0.63,,,,,,,,,,,,,

淋水填料阻力P4=,,,51.75294349,Pa,,,,,,,,,,,

配水裝置P5=,,,3.112668463,Pa,,,,,,,,,,,

收水裝置P6=,,,18.01209835,