Iberia set the objective of
confirming whether it was feasible in practice to double the TBO for overhauls on exhaust valves in
large engines operated with heavy fuel oil by applying the
additive treatment "rb bertomeu"
beco F1/ASF to the fuel, in order to reduce corrosion
at high temperatures.To this end, Deutz
Iberia proposed carrying out a monitoring programme over an
extended period on one of the BV 16M 640 (6590 kW) engines installed in the
cogeneration plant at EnergyWorks
Carballo (EWCAR), formerly Calvo Energía, one of the plants
successfully using the already mentioned additive for heavy fuel oil “rb bertomeu” beco F1/ASF.
The monitoring programme
was begun after the overhaul at 15,800 hours, and successfully completed at
21,900 hours.This meant that a TBO
of 6,100 hours had been reached, and the usual TBO of 3,000
hours for this type of engines had
been doubled, even though the exhaust valves installed were
reconditioned and had undergone up to three rectifications.
inspections were performed on two of the valves, in order to monitor their
condition; the first took place on reaching a TBO of 155 %, the second
on reaching a TBO of 177 %, where both percentages refer to a normal
TBO of 3,000 hours.
The final overhaul on all
the exhaust valves of the engine (32 in total), on reaching a TBO of
200 % (doubling the normal TBO), was performed jointly between EWCAR (See Letters of Reference), Deutz Iberia, Deutz A.G. and rb bertomeu S.L. This is a subject of
especial interest, as it means a significant reduction in maintenance
costs, as well as increased annual energy production in direct proportion
to the reduction in downtime.
The result of the monitoring programme far exceeds
the results of previous testing programmes carried out in other
cogeneration plants, which verified increases in the TBO of 50 %
(reaching 150 % of the usual TBO).
For further information on
this subject, consult the following documents compiled by rb bertomeu (by clicking on
the chosen title):