Turbine issues
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What is the subcooling degree of turbine condensate? How should the subcooling degree be controlled? What impact does the level of subcooling have on the turbine?
⑴ The improper design of the condenser causes the condensed water from the upper part to fall onto the tubes in the lower part, where it cools again. ⑵ The condenser water level was high, causing some of the copper tubes to be submerged in condensed water and resulting in supercooling. ⑶ Air leakage on the steam side of the condenser or improper operation of the vacuum extraction equipment leads to a decrease in the vapor partial pressure inside the condenser, resulting in supercooling. ⑷ The copper tubes of the condenser ruptured, allowing condensate water to leak into the circulating water (as a result, the quality of the condensate water deteriorated significantly, with issues such as excessive hardness). ⑸ Excessive cooling water flow in the condenser or too low water temperature.
You are referring to condensing-type units, right? Subcooling degree refers to the difference between the temperature of the condensate at a certain vacuum level and the actual temperature.