In conventional type gas burning devices; experimental investigation of the performance of single stage fans by transforming them into frequency controlled fans

In this study, considering the emission values of the flue gases released as a result of the combustion of LPG and the amount of fuel consumed in hermetic gas burning devices, it was always desired to achieve optimum combustion. For LPG to burn, it must mix with air between 2 - 9% and natural gas between 5 - 15%. The ideal mixing ratio is 9% for natural gas and 6.5% for LPG. Single and / or two-stage fans in hermetic gas burning devices cannot always provide the optimum air-fuel mixture ratio. In the experimental set designed, it was aimed to use energy more efficiently and to minimize its environmental effects. LPG was used as fuel in the experiment set due to laboratory conditions. Experiments, in summer mode, for 3, 4 and 5 lt / min domestic water temperature at 40, 45 and 50 ° C, the combi fan speed is 8.6, 9.6, 10.6 and 11, by means of the designed electronic circuit board Experiments were conducted at speeds of 6 m / s. As a result of the experiments, the system performance was investigated experimentally by performing the change in the amount of fuel spent and flue gas analysis. At the end of the study, while the water flow rate was 5 lt / min and the combi fan speed was at the minimum level (8.6m / s), the spent fuel amount was measured as 210 g, the CO emission value as 165 ppm and the NO emission value as 79 ppm as a result of the 10-minute measurement. While the tap water flow rate is 5 lt / min and the combi fan speed is at the maximum level (11.6 m / s), the spent fuel amount is 210 g, the CO emission value is 232 ppm and the NO emission value is 65 ppm after 10 minutes of measurement. Considering the comfort conditions, a monthly cost of 215 TL is incurred as a result of the experiments conducted when using LPG fuel for 30 hours of hot water usage, 3 lt / min flow rate and 45 ° C domestic water. At the same time, the results of the experiments have shown that NOx emissions are approximately appropriate within the scope of the ErP regulation, and the amount of fuel spent is also suitable for other flow rates and water temperatures. In the experiment, when the fan speed was reduced from the maximum fan speed to the minimum fan speed, an increase of 1-2 ° C was observed in the temperature values of the water.