Steam condenser turbine exit velocity
Steam condenser turbine exit velocity
(OP)
I am trying to find the exit velocity of the steam coming out of a steam condenser turbine. The inlet pressure is 1312.46 psia with a temperature of 867.67 F. The exit pressure is 7.84 psia with a temperature of 182.97 F. The mass flow rate through the turbine is 220,000 lbm/hr. Am I right in assuming that I can use the saturated steam tables to find the specific volume at the exit and then divide the mass flow rate by this to get volumetric flow? This would then give me the volumetric flow rate at the point where the pressure and temperature were taken.
Thanks in advance,
lurks
Thanks in advance,
lurks





RE: Steam condenser turbine exit velocity
There are 2 velocities to determine- the annulus veleocity as the steam leaves the l-1 row of blades ( needed to caclulate the lost energy due to velocity head)and also the avg velocity enteirng the turbine exhaust duct to the condenser.
"Nobody expects the Spanish Inquisition! "
RE: Steam condenser turbine exit velocity
What's the power rating and efficiency of the turbine at 200,000 lbm/hr?
Also, don't extrapolate from that one (maximum) steam flow rate and enthalpy down to lower steam flow velocity values. If you need the velocity at lower power levels (lower flow rates) you need to re-calculate using the actual mass flow at each power level, actual exit enthalpy at that power level, and actual water percent to find approximate velocity for each flow rate.
Now, if you are looking for the exit velocity of the steam across the arched round divertor plates right at the L-0 turbine blades, you need to use THAT specific area of the steam flow across the plates - NOT the entry area of the condenser! Remember that only half of the steam will flow across each divertor plate
RE: Steam condenser turbine exit velocity
Best of luck!