Open Access

ARTICLE

Development of Advanced Biomass Cookstove and Performance Comparisons Using the Modified Star Rating Methodology

Himanshu¹, Kunwar Pal², Sanjeev Jain³, S. K. Tyagi^1,*

1 Department of Energy Science and Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
2 Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
3 Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

* Corresponding Author: S. K. Tyagi. Email:

Energy Engineering 2021, 118(5), 1237-1251. https://doi.org/10.32604/EE.2021.016489

Received 10 March 2021; Accepted 16 June 2021; Issue published 16 July 2021

Abstract

A disruptive approach to a fundamental process has been applied in a biomass combustion device with two variable speed fans to supply air for gasification and another for combustion processes, separately. Besides, the preheating of secondary air, required for combustion process was also ensured through annulus chamber before being fed into the combustion chamber. The turbulent flow and homogenous mixing were also ensured by controlling the flow rate resulting in the reduced emissions of carbon monoxide (CO) and fine particulate matter (PM 2.5, particulate matter having aerodynamic diameter <2.5 micron). The design approach applied here has also ensured the homogeneous mixing of preheated air with the volatiles, resulted in cleaner combustion. This arrangement has led to the emissions of PM2.5 and CO much better than those of the earlier cookstove models, and very close to that of a liquefied petroleum gas (LPG) stove. Further, the comparative analysis based on the modified star rating of total 15 (14 are biomass and another LPG) cookstove models tested using the same standard methodology has been done and presented in this study. Based on the star rating, the performance of the LPG stove was found to be best and assigned as a 5-star product followed by the IITD model (4-star), while the other 13 models got different ratings starting from 1-star to 3-star, respectively. Also, the thermal performance of the IITD cookstove model is found to be the highest, while the emission characteristics are found to be the least among all biomass cookstove models, presented here.

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