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电伴热计算公式储罐和容器散热量计算
浏览次数:次    时间:2016-09-06 13:54:08  
电伴热计算公式储罐和容器散热量计算
  (1) 求容器或罐体的总表面积S、m2
  a.二端为平面的圆柱容器:
  S=πD(R+H)
  S---总表面积m2
  D---容器外径m
  R---容器半径m
  H---容器高度m
  b. 二端为半球的圆柱容器:
  S=πD(2R+H)
  H---为圆柱部分的高度
  c.矩形容器:
  S=[(长×宽)+(长×高)+(宽×高)] ×2; m2
  (2) 根据保温层材质、厚度、安装地点的最低温度和介质维持温度.查“表3-5”,求出容器罐体单位面积上的热损失量Q0,W/m2
  如果采用非表列的保温材料,则先按“玻璃纤维”查取Q0,再按“表3-2”修正。
  (3) 求总热损失量QZ
  QZ=(1.4~1.6)Q0·S …(3-3),W
  式中:Q0— 单位面积上的热损失量,W/m2,由“表3-5”查取。
     S—总散热表面积,m2
  (4) 计算所需电伴热带长度Ly
  Ly = Qy / P0+Lw……(3-4)
  式中:Qy—容器总散热量,W,由公式3-4求得。
  P0—能适用于介质最高维持温度电热带的米功率,W /m,选用时查表2-1~表2-3。

 

Lw—安装用长度,视各种接线盒总数定,一般每个接线盒线头留1m左右长度。

  表3-5:容器罐体散热量(Q0)
保温层 维持温度(℃)    条件
材料 厚度mm Thickness 5 10 20 30 40 50 60 70 80 90 100 120
聚氨酯 38 22.311 25.08 30.79 36.77 43.02 49.55 56.38 63.52 70.98 78.77 86.91 104.18

温度

-40℃

风速

15m/s

50 17.25 19.39 23.81 28.43 33.27 38.32 43.61 49.14 54.19 60.95 67.20 80.63
75 11.71 13.16 16.16 19.30 22.58 26.02 29.61 33.37 37.29 41.39 45.68 54.82
100 8.86 9.96 12.23 14.61 17.09 19.69 22.41 25.29 28.25 31.36 34.60 41.51
125 7.14 8.02 9.85 11.76 13.77 15.86 18.05 20.34 22.73 25.24 27.85 33.43
150 5.96 6.70 8.23 9.84 11.52 13.27 15.10 17.02 19.02 21.11 23.30 27.97
玻璃纤维 38 35.91 40.15 48.79 57.77 66.89 76.39 86.02 95.92 106.08 116.63 127.38 149.77
50 28.07 31.39 38.14 45.08 52.20 59.62 67.14 74.87 82.81 91.06 99.46 116.97
75 19.27 21.54 26.18 30.95 35.90 40.93 46.10 51.41 56.87 62.49 68.31 80.36
100 14.64 16.43 19.97 23.60 27.33 31.16 35.09 39.17 43.37 47.65 52.05 61.24
125 11.86 13.26 16.12 19.05 22.06 25.16 28.38 31.66 35.02 38.48 42.03 49.45
150 9.92 11.09 13.53 15.99 18.52 21.12 23.79 26.53 29.35 32.25 35.23 41.45
矿渣棉 38 44.14 49.32 59.95 70.83 81.81 93.19 104.61 116.36 128.34 140.42 152.17 178.08
50 34.65 38.72 47.16 55.62 64.25 73.19 82.17 91.32 100.74 110.23 120.01 139.86
75 23.99 26.81 32.53 38.44 44.49 50.59 56.81 63.14 69.59 76.23 82.93 96.76
100 18.34 20.49 24.86 29.38 34.01 38.67 43.43 48.27 53.21 58.24 63.41 73.93
125 14.83 16.57 20.18 23.80 27.50 31.27 35.12 39.11 43.11 47.19 51.34 59.86
150 12.51 13.97 16.96 20.00 23.11 26.28 29.51 32.81 36.17 39.62 43.11 50.26
硅酸钙 38 52.62 59.00 72.38 85.96 99.95 114.59 129.45 114.73 160.56 176.68 193.21 227.48
50 41.63 46.69 57.07 67.92 79.01 90.95 102.37 114.49 126.94 139.70 152.84 180.06
75 28.95 32.47 39.77 47.34 55.08 63.06 71.28 79.74 88.44 97.38 106.55 125.61
100 22.26 24.97 30.53 36.28 42.21 48.34 54.74 61.24 67.93 74.81 81.87 96.54
125 18.02 20.22 24.72 29.43 34.31 39.29 44.42 49.70 55.13 60.72 66.45 78.38
150 15.16 17.00 20.87 24.82 28.86 33.05 37.37 41.81 46.39 51.08 55.92 65.96
聚氨酯 38 7.87 10.61 16.30 22.35 28.61 35.17 42.04 49.23 56.83 64.70 72.86 90.13

温度

-10℃

风速

15m/s

50 6.04 8.22 12.62 17.30 22.16 27.24 32.56 38.13 44.03 50.13 56.46 70.06
75 4.14 5.58 8.58 11.80 15.06 18.55 22.18 25.97 29.94 34.10 38.44 47.71
100 3.12 4.21 6.52 8.91 11.45 14.07 16.83 19.71 22.72 25.87 29.17 36.20
125 2.51 3.43 5.27 7.20 9.22 11.34 13.56 15.88 18.31 20.85 23.47 29.14
150 2.13 2.87 4.41 6.02 7.71 9.48 11.33 13.27 15.30 17.45 19.67 24.40
玻璃纤维 38 12.13 16.42 25.16 34.00 43.25 52.61 62.24 72.27 82.47 92.95 103.72 126.31
50 9.53 12.79 19.61 26.61 33.72 41.18 48.72 56.47 64.45 72.65 81.15 98.85
75 6.58 8.83 13.53 18.29 23.26 28.31 33.49 38.83 43.31 50.05 55.86 68.00
100 5.06 6.79 10.32 13.95 17.68 21.60 25.56 29.63 33.82 38.12 42.56 51.81
125 4.07 5.46 8.37 11.31 14.34 17.45 20.64 23.93 27.32 30.80 34.38 41.89
150 3.40 4.57 7.00 9.46 11.99 14.56 17.34 20.10 22.94 25.86 28.87 35.15
矿渣棉 38 15.01 20.12 30.51 41.27 52.33 63.57 75.05 76.63 98.41 110.62 122.84 148.06
50 11.65 15.88 24.07 32.57 41.14 49.97 59.01 68.12 77.39 87.00 96.63 116.49
75 8.21 11.01 16.69 22.49 28.52 34.58 40.84 47.15 53.68 60.23 66.91 80.61
100 6.23 8.35 12.77 17.27 21.82 26.46 31.24 36.07 41.07 46.09 51.20 61.69
125 5.10 6.84 10.37 13.97 17.65 21.48 25.38 29.24 33.22 37.29 41.42 49.96
150 4.27 5.72 8.68 11.79 14.89 18.06 21.29 24.58 27.93 31.35 42.82 42.00
硅酸钙 38 18.13 24.39 37.39 50.90 64.82 79.21 93.88 109.18 124.71 140.78 157.28 191.24
50 14.38 19.35 29.66 40.39 51.34 62.75 74.54 86.54 98.87 111.64 124.76 151.79
75 10.02 13.49 20.76 28.16 35.95 43.86 52.02 60.02 69.17 78.05 87.17 106.12
100 7.75 10.43 15.92 21.69 27.58 33.72 40.00 46.54 53.19 60.04 67.06 81.66
125 6.25 8.42 12.95 17.58 22.44 27.38 32.48 37.80 43.21 48.75 54.48 66.35
150 5.33 7.17 10.94 14.85 18.88 23.05 27.39 31.82 36.37 41.05 45.86 55.86
聚氨酯 38       5.47 11.61 17.87 22.44 31.33 38.57 46.15 54.10 71.12

温度

+20℃ 无风速

50       4.35 9.08 13.97 19.11 24.50 30.27 36.22 42.46 55.81
75       3.04 6.23 9.59 13.22 16.94 20.85 24.95 29.24 38.43
100       2.29 4.78 7.36 10.06 12.89 15.98 19.05 22.32 29.34
125       1.84 3.90 6.00 8.20 10.51 12.84 15.41 18.06 23.73
150       1.54 3.26 5.01 6.85 8.78 10.81 12.93 15.15 19.90
玻璃纤维 38       8.23 16.71 25.45 34.45 43.73 53.30 63.41 73.61 94.95
50       6.37 13.16 20.05 27.32 34.74 42.33 50.16 58.45 75.40
75       4.48 9.26 14.10 19.08 24.41 29.75 35.24 40.90 52.56
100       3.51 7.13 10.86 14.69 18.65 22.90 27.13 31.37 40.45
125       2.83 5.74 8.88 12.02 15.25 18.58 22.01 25.54 32.93
150       2.37 4.88 7.43 10.05 12.76 15.66 18.56 21.53 27.67
矿渣棉 38       9.66 19.53 29.88 40.61 51.29 62.17 73.26 84.91 108.21
50       7.78 15.73 23.85 32.42 40.94 49.62 58.72 67.77 86.37
75       5.32 11.12 16.86 22.91 28.93 35.07 41.32 47.89 61.03
100       4.32 8.59 13.03 17.69 22.33 27.07 32.03 36.97 47.11
125       3.48 7.04 10.67 9.08 14.37 18.29 22.17 26.13 30.16 38.43
150       2.92 5.86 9.08 12.23 15.44 18.72 22.06 25.46 32.44
硅酸钙 38       11.80 24.02 37.32 50.57 64.22 78.28 92.73 108.04 139.02
50       9.58 19.49 30.00 40.01 52.09 63.49 75.22 87.28 112.35
75       6.83 13.89 21.55 29.21 37.11 45.52 53.18 62.44 80.40
100       5.20 10.95 16.70 22.83 28.99 35.35 41.88 48.60 62.58
125       4.35 8.99 13.72 18.59 23.81 29.02 34.38 39.90 51.37
150       3.77 7.67 11.70 15.85 20.13 24.54 29.08 33.74 43.44