循環(huán)水自然降溫計(jì)算

1、循環(huán)水池散熱計(jì)算(1 )水面蒸發(fā)和傳導(dǎo)損失的熱量：Qx = a y( 0.0174vf + 0.0229 ) (Pb Pq) A(760/B)式中Qx水池表面蒸發(fā)損失的熱量(kJ/h );a 熱量換算系數(shù)， a = 4.1868 kJ /kcal ;y與水池水溫相等的飽和蒸汽的蒸發(fā)汽化潛熱(kcal/kg )；vf 水池水面上的風(fēng)速(m/s ), 般按下列規(guī)定采用：室內(nèi)水池 vf = 0.20.5 m/s ;露天水池 vf = 23 m/s ;Pb與水池水溫相等的飽和空氣的水蒸汽分壓力(mmHg );3.782 KPaPq水池的環(huán)境(23C)空氣的水蒸汽壓力( mmHg );A水池的水表面面積

2、(m2 );B當(dāng)?shù)氐拇髿鈮毫?mmHg )。(2) 加上水池的水表面、池底、池壁、管道和設(shè)備等傳導(dǎo)所損失 的熱量：而水池的水表面、池底、池壁、管道和設(shè)備等傳導(dǎo)所損失的 熱量，占水池水表面蒸發(fā)損失熱量的20%。（3）水池補(bǔ)水加熱所需的熱量：Qb = aqb y （tr- tb ） /t式中Qb水池補(bǔ)充水加熱所需的熱量（kJ/h）;a 量換算系數(shù)，a= 4.1868（kJ /kcal）;qb水池每日的補(bǔ)充水量（L）;按水池水量的5y 的密度（kg/L ）;tr水池水的溫度（C）。tb 水池補(bǔ)充水水溫C）;t加熱時(shí)間（h）。（4）水池表面蒸發(fā)量的計(jì)算：Ws = ®x（Pq.b -Pa ）

3、F>B/B、式中W水池散濕量（kg/h ）;9 系數(shù)，0.00557 X10-5 kg/N.s ;Pq.b與水池水溫相等的飽和空氣的水蒸汽分壓力（Pq水池的環(huán)境空氣的水蒸汽壓力（Pa ）;F水池的水表面面積（m2 ）;B、當(dāng)?shù)氐拇髿鈮毫Γ≒a ）;10%確定;Pa);B 標(biāo)準(zhǔn)的大氣壓力（Pa ）;飽和水蒸氣壓力表溫度t/'c絕對(duì)壓強(qiáng)p/kPa水蒸汽的密汽化熱r/kJ kg-1度 pkg m-3焓 H/kJ kg-1液體水蒸汽00.610.000.002491.102491.1050.870.0120.942500.802479.86101.230.0141.872510.4024

4、68.53151.710.0162.802520.502457.70202.330.0283.742530.102446.30253.170.02104.672539.702435.00304.250.03125.602549.302423.70355.620.04146.542559.002412.10407.380.05167.472568.602401.10459.580.07188.412577.802389.405012.340.08209.342587.402378.105515.740.10230.272596.702366.406019.920.13251.212606.302

5、355.106525.010.16272.142615.502343.107031.160.20293.082624.302331.207538.550.24314.012633.502319.508047.380.29334.942642.302307.808557.880.35355.882651.102295.209070.140.42376.812659.902283.109584.560.50397.752668.702270.50100101.330.60418.682677.002258.40105120.850.70440.032685.002245.40110143.310.

6、83460.972693.402232.00115169.110.96482.322701.302219.00120198.641.12503.672708.902205.20125232.191.30525.022716.402191.80130270.251.49546.382723.902177.60135313.111.72567.732731.002163.30140361.471.96589.082737.702148.70145415.722.24610.852744.402134.00150476.242.54632.212750.702118.50160618.283.256

7、75.752762.902037.10170792.594.11719.292773.302054.001801003.505.15763.252782.502019.301901255.606.38807.642790.101982.402001554.777.84852.012795.501943.502101917.729.57897.232799.301902.502202320.8811.60942.452801.001858.502302798.5913.98988.502800.101811.603347.9116.761034.562796.801761.803977.6720

8、.011081.452790.101708.604693.7523.821128.762780.901651.705503.9928.271176.912768.301591.406417.2433.471225.482752.001526.507443.2939.601274.462732.301457.408592.9446.931325.542708.001382.509877.9655.591378.712680.001301.3011300.3065.951436.072648.201212.1012879.6078.531446.782610.501116.2014615.8093.981562.932568.601005.7016538.50113.201636.202516.70880.5018667.10139.601