Page 51 - Impiantistica industriale

3D simulation of the horizontal high pressure boiler feed water pump FEM analysis of pump and baseplate for optimization of skid
dynamic behaviour within full design speed range

FEM analysis on pump casings and tie bolts for maximizing 3D simulation of the customized pump skid
reliability of design to the worst operating conditions in terms of
temperatures & pressures.

The FEM analysis of pump and baseplate allo- The entire supply was validated
wed to optimize the dynamic behaviour of the skid with high temperature testing, a
within the full design speed range. FEM analysis
also contributed to designing casings and tie bolts “test not many pump
for the worst operating conditions in terms of tem- manufacturers are equipped to
peratures & pressures. perform
Impellers, diffusers & casings were developed
through of CFD analysis and prototype testing in
TMP’s in-house test centre: mechanical variable speed coupling allows speed
• The fi rst stage impeller was optimized for low variation from 25% to 100% of the nominal speed
NPSHr (for both single and double suction de- with a high level of reliability thanks TMP’s decen-
sign) nial experience in similar power plant application.
• The other stages were optimized for high ef- The pump mechanical seals were coupled with
fi ciency. an API PLAN 23 System, which consists of a clo-
sed loop system with a pumping ring performing
The pump skid was developed product circulation through a heat exchanger and
with highly customized auxiliary back to the seal chamber.
“equipment in order The entire supply was validated with high tempe-

to tailor to the specific plant/ rature testing, a type of test not many pump ma-
nufacturers are equipped to perform. The scope of
client requirements such test is to verify the correct mechanical opera-
tion of the pumps and their conformity to contrac-
The pump skid was also developed with highly cu- tual requirements.
stomized auxiliary equipment so as to tailor to the
specifi c plant/client requirements. In particular, the After testing, the pump skids were prepared for

Impiantistica Italiana - Maggio-Giugno 2022 49 49