Research Article
Determination and Application of Comprehensive Specific Frictional Resistance in Heating Engineering
Table 2
Diameter optimization result.
| Number | Thermal load (MW) | Design water-supply temperature (°C) | Design temperature difference (°C) | Design flow rate (kg/s) | Economic specific frictional resistance | Comprehensive specific frictional resistance | Pipe diameter (m) | Specific frictional resistance (Pa/m) | Flow rate (m/s) | Specific frictional resistance (Pa/m) | Pipe diameter (m) | Corrected pipe diameter (m) | Flow rate (m/s) |
| 100 | 184.00 | 130 | 60 | 732.59 | 0.7 | 51 | 1.90 | 65 | 0.666 | 0.7 | 1.9 | 101 | 168.61 | 130 | 60 | 671.32 | 0.7 | 43 | 1.74 | 67 | 0.39 | 0.6 | 2.4 | 102 | 160.05 | 130 | 60 | 637.24 | 0.7 | 38 | 1.66 | 68 | 0.624 | 0.6 | 2.3 | 103 | 108.22 | 130 | 60 | 430.88 | 0.6 | 38 | 1.52 | 77 | 0.521 | 0.5 | 2.2 | 104 | 45.50 | 130 | 60 | 181.16 | 0.4 | 51 | 1.44 | 105 | 0.346 | 0.35 | 1.9 | 105 | 30.61 | 130 | 60 | 121.87 | 0.35 | 45 | 1.27 | 122 | 0.287 | 0.3 | 1.7 | 106 | 20.74 | 130 | 60 | 82.58 | 0.3 | 45 | 1.17 | 142 | 0.238 | 0.25 | 1.7 | 107 | 10.62 | 120 | 50 | 50.74 | 0.25 | 42 | 1.03 | 197 | 0.183 | 0.20 | 1.6 | 108 | 15.39 | 130 | 60 | 61.28 | 0.25 | 61 | 1.25 | 161 | 0.206 | 0.2 | 2.0 | 109 | 9.18 | 130 | 60 | 36.55 | 0.2 | 66 | 1.16 | 199 | 0.161 | 0.15 | 2.1 | 110 | 6.21 | 130 | 60 | 24.73 | 0.2 | 30 | 0.79 | 235 | 0.133 | 0.15 | 1.4 | 111 | 8.56 | 130 | 60 | 34.08 | 0.2 | 58 | 1.08 | 206 | 0.155 | 0.15 | 1.9 | 112 | 35.79 | 130 | 60 | 142.50 | 0.4 | 31 | 1.13 | 115 | 0.309 | 0.3 | 2.0 | 113 | 8.66 | 130 | 60 | 34.48 | 0.2 | 59 | 1.10 | 206 | 0.156 | 0.15 | 2.0 | 114 | 9.05 | 130 | 60 | 36.03 | 0.2 | 64 | 1.15 | 201 | 0.159 | 0.15 | 2.0 | 115 | 18.08 | 130 | 60 | 71.99 | 0.3 | 34 | 1.02 | 151 | 0.223 | 0.2 | 2.3 | 116 | 9.66 | 130 | 60 | 38.46 | 0.2 | 73 | 1.22 | 197 | 0.164 | 0.15 | 2.2 | 117 | 8.42 | 130 | 60 | 33.52 | 0.2 | 56 | 1.07 | 206 | 0.154 | 0.15 | 1.9 | 118 | 16.04 | 130 | 60 | 63.86 | 0.25 | 66 | 1.30 | 158 | 0.210 | 0.2 | 2.0 | 119 | 7.82 | 130 | 60 | 31.14 | 0.2 | 48 | 0.99 | 215 | 0.148 | 0.15 | 1.8 | 120 | 8.22 | 130 | 60 | 32.73 | 0.2 | 53 | 1.04 | 209 | 0.152 | 0.15 | 1.9 | 121 | 62.72 | 130 | 60 | 249.72 | 0.5 | 32 | 1.27 | 94 | 0.402 | 0.4 | 2.0 | 122 | 17.95 | 130 | 60 | 71.47 | 0.3 | 33 | 1.01 | 152 | 0.222 | 0.2 | 2.3 | 123 | 10.53 | 130 | 60 | 41.93 | 0.25 | 29 | 0.85 | 188 | 0.172 | 0.15 | 2.4 | 124 | 34.24 | 130 | 60 | 136.33 | 0.35 | 56 | 1.42 | 117 | 0.302 | 0.3 | 1.9 | 125 | 16.86 | 130 | 60 | 67.13 | 0.25 | 73 | 1.37 | 155 | 0.215 | 0.2 | 2.1 | 126 | 8.33 | 130 | 60 | 33.17 | 0.2 | 55 | 1.06 | 209 | 0.153 | 0.15 | 1.9 | 127 | 9.05 | 130 | 60 | 36.03 | 0.2 | 64 | 1.15 | 201 | 0.159 | 0.15 | 2.0 | 128 | 7.68 | 130 | 60 | 30.58 | 0.2 | 46 | 0.97 | 215 | 0.147 | 0.15 | 1.7 | 129 | 7.21 | 130 | 60 | 28.71 | 0.2 | 41 | 0.91 | 221 | 0.143 | 0.15 | 1.6 | 130 | 9.87 | 130 | 60 | 39.30 | 0.25 | 25 | 0.80 | 194 | 0.166 | 0.15 | 2.2 | 131 | 10.12 | 130 | 60 | 40.29 | 0.25 | 26 | 0.82 | 192 | 0.168 | 0.15 | 2.3 | 100′ | 184.00 | 130 | 60 | 732.59 | 0.7 | 51 | 1.90 | 64 | 0.645 | 0.7 | 2.37 | 101′ | 168.61 | 130 | 60 | 671.32 | 0.7 | 43 | 1.74 | 65 | 0.630 | 0.6 | 2.25 | 102′ | 160.05 | 130 | 60 | 637.24 | 0.7 | 38 | 1.66 | 74 | 0.525 | 0.6 | 2.19 | 103′ | 108.22 | 130 | 60 | 430.88 | 0.6 | 38 | 1.52 | 100 | 0.350 | 0.5 | 1.88 | 104′ | 45.50 | 130 | 60 | 181.16 | 0.4 | 51 | 1.44 | 115 | 0.290 | 0.35 | 1.72 | 105′ | 30.61 | 130 | 60 | 121.87 | 0.35 | 45 | 1.27 | 134 | 0.241 | 0.3 | 1.68 | 106′ | 20.74 | 130 | 60 | 82.58 | 0.3 | 45 | 1.17 | 176 | 0.174 | 0.25 | 2.39 | 107′ | 10.62 | 130 | 60 | 42.28 | 0.25 | 29 | 0.86 | 151 | 0.209 | 0.15 | 1.95 | 108′ | 15.39 | 130 | 60 | 61.28 | 0.25 | 61 | 1.25 | 185 | 0.163 | 0.2 | 2.07 | 109′ | 9.18 | 130 | 60 | 36.55 | 0.2 | 66 | 1.16 | 219 | 0.135 | 0.15 | 1.40 | 110′ | 6.21 | 130 | 60 | 24.73 | 0.2 | 30 | 0.79 | 192 | 0.157 | 0.15 | 1.93 | 111′ | 8.56 | 130 | 60 | 34.08 | 0.2 | 58 | 1.08 | 109 | 0.312 | 0.15 | 2.02 | 112′ | 35.79 | 130 | 60 | 142.50 | 0.4 | 31 | 1.13 | 192 | 0.158 | 0.3 | 1.95 | 113′ | 8.66 | 130 | 60 | 34.48 | 0.2 | 59 | 1.10 | 188 | 0.161 | 0.15 | 2.04 | 114′ | 9.05 | 130 | 60 | 36.03 | 0.2 | 64 | 1.15 | 141 | 0.226 | 0.15 | 1.47 | 115′ | 18.08 | 130 | 60 | 71.99 | 0.3 | 34 | 1.02 | 183 | 0.167 | 0.25 | 2.18 | 116′ | 9.66 | 130 | 60 | 38.46 | 0.2 | 73 | 1.22 | 192 | 0.156 | 0.15 | 1.90 | 117′ | 8.42 | 130 | 60 | 33.52 | 0.2 | 56 | 1.07 | 148 | 0.213 | 0.15 | 2.03 | 118′ | 16.04 | 130 | 60 | 63.86 | 0.25 | 66 | 1.30 | 200 | 0.150 | 0.2 | 1.76 | 119′ | 7.82 | 130 | 60 | 31.14 | 0.2 | 48 | 0.99 | 195 | 0.154 | 0.15 | 1.85 | 120′ | 8.22 | 130 | 60 | 32.73 | 0.2 | 53 | 1.04 | 89 | 0.407 | 0.15 | 1.99 | 121′ | 62.72 | 130 | 60 | 249.72 | 0.5 | 32 | 1.27 | 142 | 0.225 | 0.4 | 1.46 | 122′ | 17.95 | 130 | 60 | 71.47 | 0.3 | 33 | 1.01 | 176 | 0.174 | 0.25 | 2.37 | 123′ | 10.53 | 130 | 60 | 41.93 | 0.25 | 29 | 0.85 | 111 | 0.306 | 0.15 | 1.93 | 124′ | 34.24 | 130 | 60 | 136.33 | 0.35 | 56 | 1.42 | 145 | 0.218 | 0.3 | 2.14 | 125′ | 16.86 | 130 | 60 | 67.13 | 0.25 | 73 | 1.37 | 195 | 0.155 | 0.2 | 1.88 | 126′ | 8.33 | 130 | 60 | 33.17 | 0.2 | 55 | 1.06 | 188 | 0.161 | 0.15 | 2.04 | 127′ | 9.05 | 130 | 60 | 36.03 | 0.2 | 64 | 1.15 | 200 | 0.149 | 0.15 | 1.73 | 128′ | 7.68 | 130 | 60 | 30.58 | 0.2 | 46 | 0.97 | 206 | 0.145 | 0.15 | 1.62 | 129′ | 7.21 | 130 | 60 | 28.71 | 0.2 | 41 | 0.91 | 181 | 0.168 | 0.15 | 2.22 | 130′ | 9.87 | 130 | 60 | 39.30 | 0.25 | 25 | 0.80 | 180 | 0.170 | 0.15 | 2.28 | 131′ | 10.12 | 130 | 60 | 40.29 | 0.25 | 51 | 1.90 | 64 | 0.645 | 0.15 | 2.37 |
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