Dear Ken >With these and similar drum based biochar kilns becoming more common, I wonder whether it is worthwhile categorising them into their basic mode of operation, so when new designs come available, they can be similarly categorised and their main design points, such as biomass to char conversion efficiency defined.
I am in favour of it but can't get too excited by the category issue because of overlapping features and I also feel that it tends to limit innovation by pigeon-holing ideas. Perhaps there is a way to view a device from several angles. As I make at least one stove that falls into 3 or 4 categories, it has to be done with a grain of salt tied on top. J >- if there are any reports or links to these developments, I would be interested. There is indeed a presentation and is should be available from the Chinese Agricultural University testing methods conference proceedings (still on-going). The presentation will be made on behalf of the college by Amartuvshin Ulziitogtokh who is working in that region. Regards Crispin
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