Our lanstove is a classical example of clean kerosene burning. www.nariphaltan.org/kerosene.pdf
Cheers. Anil On Thu, Jun 13, 2013 at 8:31 AM, Crispin Pemberton-Pigott < [email protected]> wrote: > Dear Paul O**** > > ** ** > > *>*It is so inefficient to burn dirty coal or coal of a high moisture > content.**** > > ** ** > > Please define a ‘dirty coal’. I have used many coals and they all made my > hands dirty. I know you mean they burn badly in devices they are not suited > for, right?**** > > ** ** > > >Some say that there is no such thing as a bad fuels, just bad stoves. *** > * > > ** ** > > I can certainly say that from personal experience of designing coal stoves > and advising coal stove designers. **** > > ** ** > > >Just ask anyone in the coal industry if there is any such thing as a bad > coal.**** > > ** ** > > Let us hear from them what a ‘bad coal’. I would like to know.**** > > ** ** > > >They will immediately point to many things that could make coal unfit > for combustion. **** > > ** ** > > Combustion in what? Good grief. If you build a device to burn anthracite > and load lignite into it there will be all sorts of smoke and CO. If you > put diesel into a gasoline engine you get a similar result – for very > obvious reasons. Is anyone surprised?**** > > ** ** > > >They will point to things such as moisture content, ash content, sulfur > content, grindability, ash fusion temperature, grain size, MAF calorific > value, volatile matter content, fixed carbon content and much more. **** > > ** ** > > Those are all issues that can be addressed when designing a combustor. > When trying to make a short, hot, small, fan powered multi megawatt > combustor, they are very careful to pick a coal to match exactly.**** > > ** ** > > Europeans think they are really good at burning coal – centuries of > experience, right? They bring their power station combustors to South > Africa and show them off. They all fail. None of them work. Why? Lots of > South Africans build coal burners that work really well. They also have > years of experience: *designing combustors that work with their local > coal! **Quelle surprise.** ***** > > ** ** > > The new power station Eskom is building right now can burn coal with 40% > ash. A European ‘coal expert’ will tell you that is a ‘lousy, unburnable > coal’. It works fine if you have a clue what you are doing.**** > > ** ** > > >Imagine how inefficient the coal industry would be if it had to design > power stations around each type of bad coal presented to it.**** > > ** ** > > Imagine trying to design a biomass stove that was tuned to each type of > fuel that happened to be available…oh wait…that is exactly what is > happening on this list! What a surprise, again. Is that not exactly what > you are doing?**** > > ** ** > > >If we prepare fuels correctly, designing stoves is so easy. **** > > Really? If you have unprepared fuel, but you know its characteristics > really well, designing a stove to burn it cleanly is easy.**** > > Why do ethanol stoves stink? Have you ever smelled a Clean Cook stove? > That is a highly prepared fuel. Everyone thinks designing an ethanol stove > is really easy because ‘the fuel is clean’. Rubbish. There is no such thing > as a ‘clean fuel’ and the proof is buy an ethanol stove and light it in a > closed room. Measure the CO. Fuels do *not* a clean burn make, it is a > match between the stove and the fuel and the operational method.**** > > >We focus far too much on designing stoves and surely not enough on > preparing fuels. This is the big mistake that most funding organizations > make in their promotion of clean cook stoves.**** > > We do not focus enough on how to design good stoves and hope that > preparing the fuel will compensate for our collective ignorance. Commercial > companies burn all sorts of things very well. Sometimes it involves fuel > selection or preparation. But it always involves a careful balance of the > combustor and the fuel properties.**** > > The Japanese are burning kerosene with no flame at all. Eskom is burning > coal with 40% ash. The Brits are burning car tires super clean and > recovering the metals from the gas stream. The Mongolians are burning 30% > moisture lignite with 50% volatiles cleaner than a Philips fan stove. Read > the literature: all four are heavily criticised as being ‘dirty fuels’. > There are thousands of negative references as people who have little idea > what they are talking about parrot each other’s ignorance.**** > > Of course power stations are built to deal with the available coal types. > Just like a TLUD rice hull gasifier. It is a one-trick pony. Nothing wrong > with that. **** > > Regards**** > > Crispin**** > > ** ** > > _______________________________________________ > Stoves 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/stoves_lists.bioenergylists.org > > for more Biomass Cooking Stoves, News and Information see our web site: > http://stoves.bioenergylists.org/ > > > -- Nimbkar Agricultural Research Institute (NARI) Tambmal, Phaltan-Lonand Road P.O.Box 44 Phaltan-415523, Maharashtra, India Ph:91-2166-222396/220945 e-mail:[email protected] [email protected] http://www.nariphaltan.org
_______________________________________________ Stoves 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/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
