Study On The Performance Influential Factors Of SEMI-Gasified Cookstoves And Test Method Analysis

In the rural area of China, biomass energy plays an irreplaceable role in the household energy consumption. And fuel changing is significant meaningful in the adjustment of rural energy. Focused on semi-gasified cookstove, the comparison between several performance testing methods in terms of testing procedure, performance indicators and testing results was made. With moisture content of fuel and air-control operation as two factors, experiments were conducted to investigate the influence of these factors on the thermal and emission performance of the semi-gasified cookstoves.Based on the comparison between three most common used testing methods, it was found that the theory of these methods was the same, but the adoptions with different kinds of stoves were not the same. The testing results of three biomass stoves using Chinese and WBT methods were different and the type of stove also played a vital role that affected the difference found between methods. Also, the simulation experiment using electrical stoves was performed to provide useful information when comparing different thermal efficiency testing procedure. With all the comparison mentioned above, a couple of advices were proposed for the updating of the Chinese testing standard.In the experiment focusing on the effect of moisture content of fuel, it was found that with increase of fuel moisture content, the burning rate, cooking firepower, CO emission factor and PM2.5emission factor were decreased significantly, while. the boiling time was increased. A slight decrease of thermal efficiency occurred at moisture content of22.1%while the increased moisture content of fuel enhanced the thermal efficiency in the levels from5.9%to18.2%, but the influence was statistically significant.From the experiment investigating the influence of air-control operation, it indicated that for the nature-draft cookstove, more primary air increased the PM2.5emission factor significantly, but the effect of air-control on the thermal efficiency, boiling time, burning rate, cooking firepower and CO emission factor were unremarkable. For the force-draft cookstove, with increase of second air, the PM2.5emission factor was decreased significantly while other indicators remained stable basically without significant.