Wais (Waste automotive ignition stove): an eco- efficient stove with automated oil control mechanism

This study investigates the development and performance of the Waste Automotive Ignition Stove (WAIS) prototype, designed to use waste engine oil as a cooking fuel. The primary objective was to assess its efficiency, environmental impact, durability, and economic feasibility as an alternative cooking solution. The WAIS prototype demonstrated a heat output of 4.5 kW, which was superior to charcoal stoves (3.2 kW) and comparable to butane stoves (4.0 kW), while maintaining a fuel consumption of 0.35 liters per session, highlighting its fuel efficiency. In terms of environmental impact, WAIS reduced waste oil disposal by 85% and emitted 50 ppm CO and 35 ppm NOx, which was lower than charcoal stoves but higher than butane. The stove's automated oil control system reduced fuel wastage by 30% and mitigated fire risks. Durability tests revealed that the prototype required minimal maintenance, with only one check-up in six months. Based on the findings, it is recommended to enhance emission control through filtration technology and further improve the stove’s combustion efficiency. Additionally, long-term studies should be conducted to assess the stove’s durability and real-world performance, while efforts to promote waste oil recycling and user safety should be prioritized for broader adoption.