Thermal efficiency improvement of an LPG gas cooker by a swirling central flame
✍ Scribed by S. Jugjai; S. Tia; W. Trewetasksorn
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 284 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0363-907X
- DOI
- 10.1002/er.708
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✦ Synopsis
The 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.