1371蒸汽和冷凝水系统手册(3)

1371蒸汽和冷凝水系统手册

第13冷凝水的排除失流图—适用于二次侧流体流量和入口温度恒定，出口温度发生变化的状况

章节13.7

5.2 bar 224 kg/h失流负荷

(0.4 bar) (4 m静压

压差(bar)

图13.7.9

(5.2 bar)

1371蒸汽和冷凝水系统手册

第13冷凝水的排除失流图—适用于二次侧流体流量和入口温度恒定，出口温度发生变化的状况章节13.7

疏水阀上端有200mm的安装高度

压差 (mm w.g.)

图13.7.10

1371蒸汽和冷凝水系统手册

第13冷凝水的排除失流图—适用于二次侧流体流量和入口温度恒定，出口温度发生变化的状况

章节13.7

1371蒸汽和冷凝水系统手册

第13冷凝水的排除失流图—适用于二次侧流体流量和入口温度恒定，出口温度发生变化的状况章节13.7

Questions

1. How does a reduction in set point affect stall? a| It does not affect it at all b| It reduces the percentage stall

c| The system operates under permanent stall conditions d| It increases the percentage stall

2. How does a reduction in the set point affect the steam pressure? a| It reduces the steam pressure b| It does not affect it at all c| It increases the steam pressure

d| The steam pressure equals the backpressure

3. In Example 13.7.1, with the set point at 60°C what would the steam temperature be if the system were operating at 30% heat load?

a| 100°C b| 110°C c| 120°C d| 80°C

4. In Example 13.7.1, with the set point at 60°C if the minimum possible heat load were 70%, would the system stall? a| Yes, at all loads

b| Only if the set point were increased c| No

d| Yes, but only on loads higher than 70%

5. If, in Example 13.7.1, the set point were reduced to 40°C, what would be the approximate steam temperature if the inlet temperature remained at 20°C? a| 66°C b| 45°C c| 55°C d| 76°C

6. If, in Example 13.7.1, the set point were reduced to 40°C, what would be the approximate steam temperature if the inlet temperature rose to 30°C? a| 28°C b| 38°C c| 48°C d| 58°C

1: d, 2: a, 3: d, 4: c, 5: d, 6: d

Answers

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