Why is it difficult to maintain a high vacuum in the exhaust gas of turbines in high-altitude areas?
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In areas at an altitude of 3,000 meters, it is difficult to achieve a very high vacuum level in the exhaust steam from power plant turbines. What is the reason for this?
The reasons are: 1. The airtightness work was not done properly； 2. Identified leakage points that were not addressed ； 3. Minor considerations for equipment selection ； 4. The flow rate of the water seal safety valve is too low. For reasons such as these.
Reasons for the low boiling point. Water boils at 100℃ at sea level, and at 80℃ on high plateaus. At the same condensation temperature, in low-altitude areas, the condenser-air cooling island-turbine unit located behind the steam turbine prevents the condensate from vaporizing; however, in high-altitude areas the condensate does vaporize, and the vacuum level is higher in low-altitude areas compared to high-altitude areas