|
RB-3 REDUCED FUEL OIL CONSUMPTION IN POWER PLANTS WITH ENGINES RUN WITH HEAVY FUEL OIL USING THE ADDITIVE “rb bertomeu” beco F1/ASF
|
|
rb
bertomeu, S.L. |
|
It is not
easy to calculate the fuel savings provided by a specific treatment of fuel
oil in power plants with Diesel engines, or in other combustion
installations. In order to obtain reliable values it is necessary to
monitor comparative consumption data (WITH and WITHOUT additive
treatment) over a prolonged period, along with further operating conditions
which influence overall fuel consumption (fuel oil sludge, net calorific
value, operational schedules, comparisons of data from homogeneous annual
periods, analysis of the fuel and its origin, etc.).
Many of our
customers recognise that the use of the additive “rb bertomeu”
beco F1/ASF in their cogeneration [power] plants not only provides
significant benefits in operational and financial terms, but also saves fuel
oil. However, in general, they have difficulty in quantifying these
savings accurately, estimated at between 1% and 3% in certain plants with 5-7
years experience using this particular additive.
Some customers
have collected sufficient data to be able to analyze the effects of the
additive “rb bertomeu” beco F1/ASF and quantify
the saving in fuel oil obtained. Obviously, one of the factors that
determine the scale of the saving in fuel oil is the state of repair and
efficiency of the engines prior to commencing additive treatment of the fuel
oil.
In this
respect, we may quote a highly illustrative real example, as we have received
data from an individual customer who has two cogeneration plants equipped
with the same type of engines from the same manufacturer. The engines
were adjusted differently in both plants, producing different overall
consumption figures prior to commencing the additive treatment of the fuel
oil with “rb bertomeu” beco F1/ASF. With
over two years of experience and of monitoring data in both plants, the
following results have been obtained and forwarded to us: Plants :
COOSUR,
located in Vilches, Jaén province, Spain; OLCESA, in Tarancón, Cuenca province, Spain.
Engines
: Each plant has 2 Wärtsilä
engines (running on heavy fuel oil) type 12V 46B, with a power output of 10.5 MWhe per engine. Fuel
:
Fuel oil
No. 1 (Spanish specification) used in both plants Period
monitored without the use of additives for fuel oil : between 18
months and 2 years Period
monitored with the use of additives for fuel oil :
2 years and 6 months
Additive
used
:
“rb bertomeu” beco F1/ASF in both plants
State of
engines prior to commencement of additive treatment with “rb bertomeu”
beco F1/ASF: - COOSUR Plant: very well adjusted overall, with fuel
oil consumption levels considered low, at 201.5 g / KWhe produced. - OLCESA Plant: engines less well adjusted overall
than those of COOSUR, with fuel oil consumption levels considered somewhat
excessive, at 208.5g / KWhe produced. Levels
of fuel oil consumption recorded: Plant
Period
Additive
treatment of fuel oil Consumption (g/kWhe) COOSUR
2000-2001 no additive
used
201.55
2002 beco F1/ASF 199.8
2003 beco F1/ASF 198.3
OLCESA
2000-2001 no additive
used
208.5
2002 beco F1/ASF 201.8
2003 beco F1/ASF 198.9
Reduction
in fuel oil consumption due to additive treatment:
g/KWhe
Percentage COOSUR Plant
:
201.55 – 198.3 =
3.25
1.61 % OLCESA Plant
:
208.50 – 198.9 =
9.60
4.60 % Average
saving in both
plants:
6.40
3.10 % The saving
in fuel oil detected in the COOSUR Cogeneration Plant coincides with
the saving of 1.56% calculated in our study "RB6- Tests of fuel oil additive performed in the power plant of 'Gallega de Cogen'", tests carried out over
6 months, in a plant equipped with Wärtsilä engines of 6.3 MWhe. This confirms our claim of attaining a minimum
saving in fuel oil of 1.5%, even in well-adjusted plants.
2 – CAUSES OF REDUCED FUEL OIL CONSUMPTION One of
the reasons for the reduction in consumption is the increased utilisation of
organic fuel oil sludge, that is, lower production of sludge to be removed from the system,
given that it is utilised by the engine as fuel. In the
majority of Plants using the additive “rb bertomeu” beco F1/ASF, the
reduction in fuel oil sludge is calculated in the order of 50-70%, depending
on the type of fuel oil, the impurities it contains, efficiency of filters,
etc. We hold specific data supplied by the plant of COOSUR and MSM, where
low levels of residual sludge were generated, and where the following
reductions were obtained:
COOSUR
MSM
Average
Plant
Plant
Value Power
rating,
MW
21.0
18.9
19.95 Fuel
fuel
oil no.1 fuel oil
no.1 fuel oil no.1 Fuel sludge
extracted: Kg
sludge/mT of fuel, without additive
7.75
8.04
7.90
Kg sludge/Tm fuel, with
additive
3.50
3.31
3.40
Reduction
in sludge when using additive:
Kg sludge/mT of fuel
-
4.25
-
4.73
- 4.50
Percentage
-
54.8%
- 58.8 % - 57.0 % Applying
the average value of reduction in residual sludge (- 4,5 Kg/Tm of fuel-oil)
to the overall AVERAGE reduction in fuel oil consumption as monitored in the
Plants of COOSUR and OLCESA, we are able to calculate the
percentage of reduction in consumption due to the reduction in residual
sludge: COOSUR Plant :
201.55 x 4.50/1000 = 0.907
g/KWhe =
0.45 % of the total saving OLCESA Plant :
208.50 x 4.50/1000 = 0.938 g/KWhe
= 0.45 % of the
total saving Average
value : 0.45 % of the total saving
in fuel oil
Considering
the average value given above (0.45%) and the overall average saving in the
two plants together (3.10 %), we can extrapolate the following breakdown of
the causes of the saving in fuel oil: Saving
in fuel oil due to reduced residual sludge
:
0.45 % Saving in fuel oil due to improved combustion : 1.56 %
Saving in fuel oil due to less waste accumulation in turbo compressors: 0.19 %
Saving
due to less wear in the injection system : 1.50 %
Total : 3.10 %
|
|
©
rb bertomeu, S.L. - Pol. Ind. Fondo de Llitera, Par. 82-83 - E-22520 Fraga,
Huesca (Spain) Tel.: +34 974 47 48 04 /
+34 630 43 08 43 |