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{pboot:sql sql='SELECT count(*) as count FROM ay_content_sort where pcode=65'}
{/pboot:sql}
通风量
直配管的压力降下
计算例
| Q = |
H γ•Cp(t2-t1)•60 |
| Q : | 通风量 | [m / min] |
| H : | 所产生的热量 | [kcal / h] |
| γ : | 空气比重 | 1.2 [kg / m3] |
| Cp : | 空气比热 | 0.24 [kcal / kg• ºC] |
| t1 : | 室外温度 | [ºC] |
| t2 : | 室内温度 | [ºC] |
| (1kW = 860kcal / h) | ||
范例 1
|
不带干燥机的完整通风 型号:Z55A4类型 |
|
| 所产生的热量:H |
= 55 [kW] × 860 [kcal / h] = 47300 [kcal / h] = t2–t1 = 5 [ ºC] |
◊ 通风量
| Q = |
47300 1.2 × 0.24 × 5 × 60 |
= 547[m3/ min] |
◊ 通风窗口面积
| A = |
Q 60 × ν × α |
|
假设 ν = 2 [m / 秒], α = 60 [%]
| A = |
547 60 × 2 × 0.6 |
= 7.6[m2] |
范例 2
|
不带干燥机的现场通风 (管道通风) 型号: Z55A |
|
| 所产生的热量:H |
= 55 [kW] × 860 [kcal/h] × 0.05 = 2365 [kcal / h] = t2–t1 = 5 [ºC] |
◊ 通风量
| 2365 | ||
| Q = |
|
= 27.4[m3/ min] |
| 1.2 × 0.24 × 5 × 60 |
◊ 通风窗口面积
| 吸入 空气量 Q1 |
= 换气量 + 逸出量 = 27 + 140 = 167[m3] |
| A = |
Q 60 × ν × α |
|
假设 ν = 2 [m / 秒], α = 60 [%]
| A = |
167 60 × 2 × 0.6 |
= 2.3[m2] |
范例 3
|
不带干燥器的完整通风 型号: Z55A |
|
| 所产生的热量:H |
= 55 [kW] × 860 [kcal/h] = 47300 [kcal / h] |
| 乾燥机 DN55 11024 [kcal / h] | = t2–t1 = 5 [ºC] |
◊ 通风量
| Q = |
473000 + 11024 1.2 × 0.24 × 5 × 60 |
= 675[m3/ min] |
◊ 通风窗口面积
| A = |
Q 60 × ν × α |
|
假设 ν = 2 [m / 秒], α = 60 [%]
| A = |
675 60 × 2 × 0.6 |
= 9.3[m2] |
范例 4
|
带干燥机的现场通风 型号: Z55A |
|
| 所产生的热量:H |
= 55 [kW] × 860 [kcal/h] × 0.05 = 2365 [kcal / h] |
| 乾燥机 DN55 11024 [kcal / h] | = t2–t1 = 5 [ºC] |
◊ 通风量
| Q = |
2365 + 11024 1.2 × 0.24 × 5 × 60 |
= 155[m3/ min] |
◊ 通风窗口面积
| 吸入 空气量Q1 |
= 换气量+逸出量 = 155 + 140 = 295[m3/ min] |
| Q |
|
|||||
| A = |
|
|||||
| 60 × ν × α |
假设 ν = 2 [m / 秒], α = 60 [%]
| A = |
295 60 × 2 × 0.6 |
= 4.1[m2] |
