The inventory EE in Indonesia is still very limited. The power needs of society and industry is increasing every year. Fossil energy sources are a major source of power generation tend to decrease dramatically and environmental impacts. The potential of RH and the PB in Indonesia is quite large which is produced every year. Based on previous studies, Indonesia has the potential of RH around 13.81×106 tons.The potential of PSW an average of about 252,945 tons/year generated from the year 2008-2010, This potential can be exploited as a source of EE as well as the results of previous studies, in Thailand and in India

1. CO-COMBUSTION MODELLING OF RICE HUSK AND PLASTIC
BAGS AS ENERGY SOURCE IN INDONESIA
Muhammad Anshar, Farid Nasir Ani, Ab Saman Kader
The International Conference on Computational
Fluid Dynamics in Research and Industry
2015 (CFDRI 2015)
KUALA LUMPUR, 18-19 AGUSTUS 2015

2. INTRODUCTION
 The inventory EE in Indonesia is still very limited.
 The power needs of society and industry is increasing every year.
 Fossil energy sources are a major source of power generation
tend to decrease dramatically and environmental impacts.
 The potential of RH and the PB in Indonesia is quite large
which is produced every year.
 Based on previous studies, Indonesia has the potential of RH
around 13.81×106
tons.
 The potential of PSW an average of about 252,945 tons/year
generated from the year 2008-2010,
 This potential can be exploited as a source of EE as well as the
results of previous studies, in Thailand and in India.

3.  The mass composition between 90% of RH and 10% of PB
(RH90+PB10).
 Calorific value (CV) of RH is obtained based on the standard
procedure of ASTM D.5865 using Bomb Calorimeter.
 Proximate analysis was carried out under the standard procedure
ASTM D 3172 - 3175 and ISO 565,
 Ultimate analysis was performed under the standard procedure
ASTM D 3176, ASTM D 4239, and ASTM D 5373.
 Geometry of the furnace is obtained by Autodesk Mechanical
Desktop software, Meshing done with Gambit software
 Co-combustion modeling of RH90+PB10 performed using FLIC and
Ansys - Fluent software.
MATERIALS AND METHODS

4. MATERIALS AND METHODS
Fig-1. Geometry models of furnaces are used for small power plants i.e. 7.5×5.7×12 m.

5. MATERIALS AND METHODS
BOUNDARY CONDITION
This modeling using the boundary condition:
 Fuel feed rate of about 6,575 kg/h at 298 K,
 The AFR stoichiometric of about 1.2,
 The primary air about 6 kg/s at 453 K,
 The secondary air 1 and 2 of about 3.2 kg/s
at around 453 K,
 The capacity of 10 MW.
.

6. RESULTS AND DISCUSSION
Table 1. Calorific value, proximate and ultimate analysis of RH and RH90
+PB10
.Fuel
materials
CV
(kJ/kg)
FC
(%)
VM
(%)
MC
(%)
C
(%)
H
(%)
O
(%)
N
(%)
S
(%)
Ash
(%)
RH 13442 14.81 55.62 10.46 39.28 5.08 35.81 0.64 0.08 19.11
RH90+PB10 18847 13.62 58.65 9.68 42.21 5.82 33.45 0.64 0.08 19.11
Table 2. Modeling results of RH90+PB10 and RH on grate bed furnace.
Fuel
materials
Combustion characteristic in grate bed furnace
Tg
max.
(K)
Tg
average
(K)
Tg
exit
(K)
Vg
(m/s)
ηsg
(%)
Overall
AFR
Stoich.
Total fuel
input
(kg/h)
Total energy
in fuel input
(MWt)
RH 1680 1138 950 8.51 100 0.837 6575.35 24.55
RH90+PB10 1710 1186 1100 9 100 0.726 6575.35 34.42
 Table 2, show the addition of about10% PB to the RH (co-combustion of RH90+PB10) provide
significant effect on several variables combustion.
 Input data used for modeling the data that was the result of experiments, as presented in Table 1

7. Figure-2. Gas temperature characteristic of RH90+PB10 in grate bed
RESULTS AND DISCUSSION

8. Figure-3. Profile of CO, CO2, O2, and H2O of RH90+PB10 at the top bed.
RESULTS AND DISCUSSION

9. Figure-4. Profile of combustion gas of RH90
+PB10
at the top bed.
RESULTS AND DISCUSSION

10. Figure-5. Contours of of RH90
+PB10
: a) Static temperature (K); b) CO (%)
RESULTS AND DISCUSSION

11. Figure-5. Contours of of RH90
+PB10
: c) CO2
(%); d) H2
O (%).
RESULTS AND DISCUSSION

12. CONCLUSION
 The results of the co-combustion modeling of
RH90+PB10 showed the ability and feasibility as
an alternative source of electrical energy in
Indonesia.
 The application of the co-combustion of
RH90+PB10 as a source of energy could be one
solution to meet the electrical energy needs and
overcome the plastic bag waste pollution in
Indonesia.