[Stoves] Combustion characteristics of biomass fuels in a fixed bed micro-gasifier cook stove

[Frank Shields]

Hi Tom,

This is a very good start and perhaps their methodology could be extended to test other parameters. Like shape and particle size of biomass. Carbon densities (both packed and bulk) along with volatile fractions etc. Rather than ‘coconut shells’, 'Juliflora and pellets'. Stacking fuels vertical or horizontal, high resin fuels etc. etc. Its the set-up they used that is more of interest to me. 

Also nice to rate success based on optimal conditions before the secondary flame (once determined what optimum is) by using Helium surrogate rather than thermal efficiency. That would eliminate the extended potential added variables regarding pots and water heating etc. Goal being to produce and maintain the optimum conditions for the secondary flame. Surrogate yields plotted data resulting in much faster detection and necessary changes to maintain optimum. I am thinking. 

Thanks

Frank 

(on Helium again - : ). 


 



> On Feb 18, 2017, at 8:53 PM, Tom Miles <tmiles at trmiles.com> wrote:
> 
> This is just the abstract but how do these results compare with tests of similar stoves? How would other, or additional, tests that have been mentioned in the last few months change the results or use of the data?  
> Combustion characteristics of biomass fuels in a fixed bed micro-gasifier cook stove 
> Sakthivadivel, D. & Iniyan, S. J Mech Sci Technol (2017) 31: 995. doi:10.1007/s12206-017-0152-y
> https://link.springer.com/article/10.1007/s12206-017-0152-y <https://link.springer.com/article/10.1007/s12206-017-0152-y>
> Abstract
> 
> This paper deals with the effect of different biomass fuels used in a fixed bed advanced micro-gasifier cook stove’s combustion process. Combustion of different biomass fuels like coconut shells, Prosopis Juliflora and wood pellets were investigated in an advanced cook stove for an air velocity of 3 m/s. The actual testing procedure followed to evaluate full performance characteristics of the stove was as per the world standard protocol WBT 4.2.3, and the results were analyzed in terms of thermal efficiency. The measured variables like bed temperatures, mass loss and exit gas composition were used to estimate the combustion characteristics of each fuel in terms of flame propagation, fuel burning rate and the combustion quality. The two mode operations of combustion processes namely flaming and char mode of the fuels were also studied. The experimental outcomes provide a clear idea on the impact of the different fuel properties on flame propagation, burning rate and indoor air quality. Thus, the flame propagation rates are 0.063, 0.071 and 0.05 mm/s with an average fuel burning rate of 16, 12 and 10 g/min are achieved. Also the thermal efficiency of fixed bed micro-gasifier is found to be about 36.7±1 % for coconut shell, 36±1 % for Prosopis Juliflora and for wood pellets it is about 38.5±1 %.
>  
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Thanks

Frank
Frank Shields
Gabilan Laboratory
Keith Day Company, Inc.
1091 Madison Lane
Salinas, CA  93907
(831) 246-0417 cell
(831) 771-0126 office
fShields at keithdaycompany.com



franke at cruzio.com



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