Turbine exhaust temperature
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With the turbine vacuum remaining constant, the exhaust temperature changes with the ambient temperature; how can this be explained?
Vacuum level, exhaust pressure, and exhaust temperature are interrelated. The exhaust pressure minus atmospheric pressure is the vacuum level, while the saturated steam pressure corresponds to a saturated steam temperature. So it’s not true that the exhaust temperature changes while the vacuum level remains constant. Changes in exhaust temperature inevitably lead to changes in exhaust pressure.
Changes with temperature? Do you mean the environmental climate? That is also possible, as the temperature of the circulating cooling water in winter is much lower than that in summer. With the same degree of opening, the cooling effect on the last stage of the turbine will certainly be different; it should be lower in winter. Everyone’s feedback is welcome