In an effort towards improving the performances of the liquid and gas based combustion devices, in the recent past, Porous Media Combustion (PMC), has emerged as a potential solution. Unlike the conventional combustion devices in which combustion takes place completely in the gaseous environment, in the PMC, the porous media augments the combustion, and depending upon the situation, the combustion can be completely inside or on the surface of the porous matrix. If a larger surface area to volume ratio increases the heat transfer by convection, the highly conducting and radiating porous matrix also augments heat transfer by conduction and radiation. Because the gases have low thermal conductivity and emissivity, in the Free Flame Combustion (FFC), the heat transfer is mainly by convection. On the other hand, all three modes of heat transfer are significant in the PMC. Thus, in the PMC, combustion is better and it results in improved thermal efficiency and low emissions. In addition to these, in the PMC, low calorific value fuels can also be combusted.
Parameters |
CB Stove |
PRB Stove |
Thermal Efficiency (%) |
60-65 |
71-73 |
CO emission (ppm) |
220-250 |
30-140 |
NOx emission (ppm) |
5-25 |
0.2-3.5 |
Parameters |
CB Stove |
PRB Stove |
Thermal Efficiency (%) |
38-45 |
55-58 |
CO emission (ppm) |
335-545 |
23-38 |
NOx emission (ppm) |
28-46 |
2.1-9.2 |
Parameters |
CB Stove |
PRB Stove |
Thermal Efficiency (%) |
30-45% |
44-55% |
CO emission (ppm) |
335-1165 |
60-190 |
NOx emission (ppm) |
28-110 |
2-10 |
Parameters |
Kerosene |
Nanoparticle blended kerosene |
Waste Cooking Oil and Kerosene blend |
||
CB |
PRB |
PRB |
CB |
PRB |
|
Thermal Efficiency (%) |
48.5-58 |
55.5-64.3 |
58.5-67.1 |
28.6-36.2 |
37.8-45.3 |
CO emission (ppm) |
610-915 |
180-290 |
120-220 |
905-1300 |
361-664 |
NOx emission (ppm) |
19-35 |
1.5-4.1 |
1.2-3.5 |
84-180 |
13.8-47 |
Parameters |
CB Stove |
PRB Stove |
Thermal Efficiency (%) |
43-51 |
62-51 |
CO emission (ppm) |
311-456 |
129-180 |
NOx emission (ppm) |
9.4-16.1 |
0.78-3.9 |