ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Cookstove Testing: Effect of Suction Pressure of Emission Hood on the Cookstove - a Semi-Analytical Study
Laboratory testing of cookstoves is commonly performed using the hood-duct method. When a natural draft cookstove is tested under such a hood, the negative gauge pressure prevailing at the entrance of hood may affect the airflow through the primary air and secondary air inlets of the cookstove, resulting in increased burning rate and thus altered cookstove performance. This paper studies the effects of the negative gauge pressure at the entrance of the hood on the airflow rates induced into a natural draft cookstove. An analytical steady state model of the cookstove is developed by using entrainment coefficient
α and introducing a fuel bed pressure drop factor β. The results show that when the hood suction pressure reaches 0.6 Pa, it starts affecting the cookstove’s natural aspiration rates.