Performance analysis of a biogas operated porous radiant burner for domestic cooking application
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ENVIRONMENTAL AND ENERGY MANAGEMENT
Performance analysis of a biogas operated porous radiant burner for domestic cooking application Lav Kumar Kaushik 1 & Arun Kumar Mahalingam 2 & Muthukumar Palanisamy 1 Received: 6 January 2020 / Accepted: 14 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, the combustion characteristics of biogas in a Porous Radiant Burner (PRBBG) designed for domestic cooking appliances are presented. Developed PRBBG consists of two layers of porous matrices viz., Silicon Carbide (SiC) and Alumina (Al2O3) 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 (ηth) and emission characteristics of the burner are investigated and also compared with its conventional counterpart. Overall performance assessment shows that PRBBG operating at lower equivalence ratio and lower firing power has better thermal efficiency with lower CO and NOx 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 NOx concentration was lower than 4 ppm. Whereas, for Conventional Burner (CB), thermal efficiency, CO, and NOx emission are found in the range of 43–52%, 211–276 ppm, and 9–15 ppm, respectively. The overall performance showed that PRBBG is capable of burning a lean biogas-air mixture with better thermal efficiency and lower emissions. Keywords Porous Media Combustion . Biogas . Porous Radiant Burner . Thermal efficiency . CO and NOx emissions
Introduction The present socio-economic and ecological scenarios in India demand the access to affordable, reliable, sustainable and cleaner energy for meeting all basic needs (GOI 2018). The limited source of fossil fuel resources and associated environmental pollution are the major impediments towards achieving these goals. The contribution of renewable energy sources in the total energy supply needs to be improved for sustaining Responsible Editor: Philippe Garrigues * Muthukumar Palanisamy [email protected]; [email protected] 1
Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati 781039, India
2
Centre for Energy, Indian Institute of Technology Guwahati, Guwahati 781039, India
expeditious urbanization and minimum living standards for millions of Indian households (Fig. 1). Renewable energy sources are believed to play an important role in the future energy network. In the present scenario, power generation, transport, heating and cooling, and rural/ off-grid ener
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