Large eddy simulation of combustion and load increase progress optimization of auxiliary biomass gas boiler of solar heating station
Design of biomass gas furnace is of great value for improving the combination of low-carbon energy.LES method was used to analyze the temperature distribution of the heating pipe zone and the load increase change of outlet.The sensitive temperatureTawas proposed,and the influence of the fuel increase ratio b was analyzed on it.Also,the influence of bottom combustion inlet angles and position was analyzed by studying the enthalpy drop.It is concluded that after adding the bottom inlet,boiler gas flows more smoothly and the uneven temperature of the inlet and outlet areas of the heat pipes are obviously alleviated.Flue gas distribution becomes more uniform during the load increasing.The heat transfer uniformity improves obviously.The difference of flow rate at different positions are relatively small when b=3.The best results is a distance of 0.135 m from the heat pipe area when the bottom inlet angle is 60°.In summary,adding the bottom combustion inlet shows a high application value by leading to the improvement the operation safety and operation efficiency.
biomass gas furnacebottom combustion inlettemperature distributionload increaseenthalpy dropLES
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