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STEAM TURBINE BAD VACCUM AND HIGH CONDENSER TEMPER

Saturday, March 24, 2018   By: ANEES LARIK [2249] 0 Stars
we have 900 kw steam turbine, we are facing bad condesnser vaccum and high steam exhaust temperatutre. please guide

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Monday, March 26, 2018   By: cmolanes@itba.edu.ar [50] 4 Stars

There are several possible causes. Indeed, higher temperature goes together with higher pressure in the condenser. This will certainly reduce the turbine output.

One cause may be lack of cooling effect, either because of insufficient water flow, or too high a cooling water temperature, or excessive tube dirt causing thermal insulation impairing heat transfer.

Another possible cause is a deficiency in air eyectors, so there may be a pressure build up due to air entering into the system.

Claudio Molanes

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Tuesday, March 27, 2018   By: Ross Burns [390] 5 Stars
Can I ask if the steam turbine condenser lost vacuum quickly with a fast increase in condenser shell temperature?

Ross

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Thursday, March 29, 2018   By: Basem Belal [2194] 2 Stars
there are many reasons behind bad vacuum:
1- cooling system is not working properly, check all its components.
2- condenser is not working properly, check deposits on cooling water side, remove deposits. and clean tubes of water side.
3- evacuation system is not working properly, check its component and check if there is blockage in its connection with condenser.
4- for small turbines may be turbine sealing damaged and cause steam pass from inlet to outlet causing high pressure and temperature, check and repair lapiranth seals.

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Sunday, April 08, 2018   By: Jim Watts [764] 5 Stars
If you provide the turbine exhaust temperature the condensate temperature and the condenser absolute pressure it is possible to indicate if the cooling is insuffient or the turbine is too hot or there is an air in the condenser.

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