Dear Prof. Chanakya, congratulations! Yours A.D.Karve On Sun, Oct 21, 2012 at 12:15 AM, Hoysall Chanakya < [email protected]> wrote:
> Dear List users > At this small end of the scale it is best today to adapt motorcycle > engines to 100% biogas [biogas start and biogas run] systems. Modern > motorcycle engines are highly tuned and have multiple spark plugs and > carburettion /ignition advance can be controlled through various software > based engine control units (ECUs]. Therefore one can get > biogas-2-electricity efficiencies upwards of 20-22% i.e. getting > 1.42-1.5kWh electrical per standard cubic metre of biogas. This is > something unheard of at this end of the scale. > > Earlier we did modify the older petrol-start kerosene-run Honda /Yamaha > /Villiers engines for this purpose. The compression ratios of these > engines have been kept low to avoid knocking [4.5 to 5 for running with > kerosene] and so the energy efficiency comes down to about 6-8.5% > (requiring about 1.8-3 cu.m biogas per kWh). Therefore if you have the > wherewithal and required skills then it would be better to take up a 100 > -125cc modern motorcycle engine and get a high efficiency even at > compression ratio of 9 [instead of the ideal 13] and compensating the low > flame velocity by alternative methods of firing such as multiple spark > plugs, etc. which these engines anyway allow in their software. They can > also be tuned for lean burn enormously increasing efficiencies at low > loading!! > > Just for the record > We did just filed a patent and got a company to agree for mass manufacture. > You could ask "Race Dynamics" for engines of this kind > happy hunting > Chanakya > > > > > > > > > > Dear friends, > > > > > > I am looking for advice/information on very small (5-10 kW) > > water-cooled gensets suitable for being fueled by biogas. Prefer > > US-based options, but any information would help. > > > > > > d. > > > > _______________________________________________ > > Digestion mailing list > > > > to Send a Message to the list, use the email address > > [email protected] > > > > to UNSUBSCRIBE or Change your List Settings use the web page > > > http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org > > > > for more information about digestion, see > > Beginner's Guide to Biogas > > http://www.adelaide.edu.au/biogas/ > > and the Biogas Wiki http://biogas.wikispaces.com/ > > > > > > -- > > This message has been scanned for viruses and > > dangerous content by MailScanner, and is > > believed to be clean. > > > > > > > -- > Dr. Hoysall Chanakya > Centre for Sustainable Technologies > (Assoc. Faculty at Centre for Infrastructure, Sustainable Transport and > Urban Planning (CiSTUP) and Centre for Contemporary Studies) > Indian Institute of Science, Bangalore 560 012 > ph 91-80-2293 3046; fax-91 80 2360 0683 > > > -- > This message has been scanned for viruses and > dangerous content by MailScanner, and is > believed to be clean. > > > _______________________________________________ > Digestion mailing list > > to Send a Message to the list, use the email address > [email protected] > > to UNSUBSCRIBE or Change your List Settings use the web page > > http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org > > for more information about digestion, see > Beginner's Guide to Biogas > http://www.adelaide.edu.au/biogas/ > and the Biogas Wiki http://biogas.wikispaces.com/ > > -- *** Dr. A.D. Karve Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)
_______________________________________________ Digestion mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org for more information about digestion, see Beginner's Guide to Biogas http://www.adelaide.edu.au/biogas/ and the Biogas Wiki http://biogas.wikispaces.com/
