Papers by Arun Kumar Mahalingam
Energies
The rapidly growing global demand for pollutant-free cooking energy has proliferated the research... more The rapidly growing global demand for pollutant-free cooking energy has proliferated the research and development of energy efficient and clean cook-stoves. This paper presents a comprehensive review on the gradual improvements in cook-stove designs, focusing on gaseous and liquid fuel-operated cook-stoves around the world. Various literatures concerning the technical aspects such as design and testing, are brought together to provide an insight into the present status of developments in cook-stoves. This review of cook-stove performance covers topics such as stable operating conditions, flame propagation aspects, heat transfer and temperature distribution within the burner, fuel consumption, thermal efficiency, and emissions. Covering both laboratory-scale and field studies, the various cook-stove technologies reported so far are summarized with relevant comments regarding their commercial viabilities. The numerical modeling of combustion in cook-stoves; human health and the enviro...
International Journal of Global Warming
Chemical Engineering Transactions, 2020
With increase in cost of gaseous fuels and depletion in their reserves, it has become essential t... more With increase in cost of gaseous fuels and depletion in their reserves, it has become essential to further improve the efficiency of the commercial gaseous burners which generally have low thermal efficiency and high emissions. Porous Radiant Burner (PRB) is one such emerging technology which assists lean combustion, thus yielding clean burning and improved thermal efficiency in comparison to a conventional free-flame burner i.e., CB. This paper presents an experimental investigation on LPG combustion employing a simple and yet novel technique of clustering 3 individual bi-layered PRB. Each PRB is of 70 mm diameter with a SiC foam as combustion layer and a porous alumina filter as preheat layer. Transient analysis of the surface temperature distribution was conducted to find out the range of its operational stability, that is restricted by blow-off, flashback and flame quenching. Thermal efficiency tests were carried out for a firing rate of 12.56 kW, as per BIS 14612:1999. Concentr...
Energy for Sustainable Development, 2022
Environmental Science and Pollution Research, 2020
In this paper, the combustion characteristics of biogas in a Porous Radiant Burner (PRB BG) desig... more In this paper, the combustion characteristics of biogas in a Porous Radiant Burner (PRB BG) designed for domestic cooking appliances are presented. Developed PRB BG consists of two layers of porous matrices viz., Silicon Carbide (SiC) and Alumina (Al 2 O 3) and operates in the biogas flow range of 177 to 530 l/h with stable equivalence ratio (ϕ) range of 0.75 to 0.95. The effects of biogas flow rate and equivalence ratio on thermal efficiency (η th) and emission characteristics of the burner are investigated and also compared with its conventional counterpart. Overall performance assessment shows that PRB BG operating at lower equivalence ratio and lower firing power has better thermal efficiency with lower CO and NO x emissions. The performance of the burner in terms of temperature mapping suggests that firing power variation is of higher importance than that of equivalence ratio. The maximum temperature difference between the center and the periphery of the burner surface is found to be~83°C at an equivalence ratio of 0.95. The thermal efficiency varies in the range of 51-62% and its maximum is at 0.75 equivalence ratio and 177 l/h flow rate of biogas. Within the range of studied biogas flow rate range, CO emission is in the range of 29-80 ppm and NO x concentration was lower than 4 ppm. Whereas, for Conventional Burner (CB), thermal efficiency, CO, and NO x emission are found in the range of 43-52%, 211-276 ppm, and 9-15 ppm, respectively. The overall performance showed that PRB BG is capable of burning a lean biogas-air mixture with better thermal efficiency and lower emissions.
Uploads
Papers by Arun Kumar Mahalingam