Thermal efficiency improvement of an LPG gas cooker by a swirling central flame

Abstract

SUMMARYThe present study proposes a swirling central #ame technique to improve the thermal e$ciency of a conventional open-#ame atmospheric gas cooker which is now widely used as a domestic appliance. More extensive studies were done in an e!ort to improve the thermal e$ciency of the cooker by reducing thermal inertia of the pan support and using the proposed porous medium technology to recover heat from #ame radiation to preheat the secondary air entrained from the bottom of the burner. The experimental results showed that the thermal e$ciency of the swirling central #ame burner with conventional support is approximately 15 per cent higher than that of the conventional radial #ow burner. This can be attributed to the higher heat transfer coe$cient between hot #ue gas and vessel surface of the swirl burner than that of the conventional one. By replacing the conventional support of the developed swirl burner with a lighter one, whose mass was reduced by a factor of 3.7, the thermal e$ciency could be increased by about 3 per cent. By using the proposed preheating secondary air support instead of the light support, the thermal e$ciency could be further improved by 3 per cent. The predicted thermal e$ciency obtained from the proposed model showed good agreement with the experiment.

The Parametric Study of High Pressure Gas Burner Affect Thermal Efficiency

“…Many researchers had pay attention to higher thermal efficiencies and lower emissions of domestic gas burner since the increasing demand for energy saving [3,5,[8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The modified high pressure gas burner was improved the angles of outer and inner ports and the numbers of outer and inner ports, which affect the thermal efficiency.…”

Co-Firing of Sawdust and Liquid Petroleum Gas in the Application of a Modified Rocket Stove

“…In addition, the maximum thermal efficiency of the improved LPG cooking stove was around 57.5% [13]. Although the maximum thermal efficiency of the 385-mm stove (38.89%) was lower than that of the improved LPG cooking stove, it was acceptable when it was compared with the improved cooking stoves (their thermal efficiency was in the range of 25-37%) [12].…”

Primary air entrainment characteristics for a self-aspirating burner: Model and experiments

“…Jugjai et al [2] and Hou et al [3] studied the thermal performance improvement of self-aspirating burners which used LPG as fuel. They found that thermal efficiency can be increased by changing the flow pattern of the flame from a radial flow to a swirling central flow.…”