Daily, one day 20181216
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What are the reasons for the increase in exhaust temperature during the startup and acceleration of a steam turbine? ①The vacuum in the condenser decreases; air is not completely removed, and steam mixes with air. Since air has poor thermal conductivity, this leads to an increase in the exhaust pressure as well as a higher saturation temperature. ②A large amount of drain water from the main steam and reheat pipes, as well as from the cylinder itself, is directed to the expansion tank; the steam emerging from the expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4–5 times higher than the saturated temperature inside the condenser. ③During the warm-up process, the steam flow decreases and the slower flow rate prevents the frictional heating generated by the blades from being removed in a timely manner.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴ The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵ A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser. ⑶ During the warm-up process, the steam flow is low and the flow velocity is slow, so the heat generated by friction in the blades cannot be removed in a timely manner.
(1) The vacuum in the condenser decreases; air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. (2) A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam coming out of the expansion tank is discharged into the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser. (3) During the warm-up process, the steam flow is low and the flow velocity is slow; therefore, the heat generated by friction in the blades cannot be removed in a timely manner.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
⑴The vacuum in the condenser decreases, air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. ⑵A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam that emerges from this expansion tank is then sent to the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser.
(1) The vacuum in the condenser decreases; air is not completely removed, and steam mixes with air. The poor thermal conductivity of air leads to an increase in exhaust pressure, as well as a higher saturation temperature. (2) A large amount of drain water from components such as the main steam pipes, reheat steam pipes, and the cylinder itself is directed to the expansion tank; the steam coming out of the expansion tank is discharged into the throat of the condenser. The temperature of this drain water and steam is 4 to 5 times higher than the saturated temperature inside the condenser. (3) During the warm-up process, the steam flow is low and the flow velocity is slow; therefore, the heat generated by friction in the blades cannot be removed in a timely manner.