Experimental and Performance Assessment of Indonesian Biomass-Fired Based Stove with Internal Air Box using Coconut Shell

Abstract

This paper presents an integrated performance evaluation of in-lab manufacturing own designed prototype biomass fired-stove used coconut shell as feedstock. Two different stoves in terms of air required for combustion supply mode;(1) external air box (EAB), (2) internal air box (IAB) mode were tested and assessed with respect to the following performance indicator such as water time to boil, specific fuel consumption, and thermal efficiency. The stoves tested were the forced draft modified rocket-stove types with a battery mini fan-assisted to induce draft to force the controlled air for combustion requirement into the stoves. Flame temperature was recorded and displayed using K-type thermocouple and thermometer indicator respectively. Specific fuel consumption (SFC), thermal power (Pth) and the thermal efficiency (th) were calculated using the water boiling test (WBT 4.2.3) version protocol. Results showed that the internal air box (IAB) mode has higher thermal efficiency (38 %), specific fuel consumption (2.5 kg/h), and flame temperature (500 0C) than external air box (EAB) mode. However, the thermal output of the EAB (2.3 kW) was reached higher compare to IAB mode. The findings were used to improve the current biomass fired-stoves further that usually used for heating and cooking applications in rural communities. This paper presents an integrated performance evaluation of in-lab manufacturing own designed prototype biomass fired-stove used coconut shell as feedstock.