Dear Martin in a playful mood You forget to mention being able to cut wood this afternoon and cook supper immediately. That saves the effort of waiting for it to dry. You know, I like Rok Oblak's drying of fuel on the outside of the stove. That helps the lazy accomplish something else while loafing.
I am picking up Jean-François' comment about the claimed performance for the Envirofit stoves, i.e that they are modest. Well, isn't that better than exaggeration? I spent many years designing production equipment for small industries and a production claim has to go with each system. They are run by ordinary people who learn on the go. What worked well was based on 6 hrs per day of applied effort. After 4 months our estimates were usually exceeded. So if you claim a performance that everyone can achieve after a month or so it leaves most people happy. As you can see most products they showed are some iteration of a Rocket Stove which typically has an efficiency of 27%. The big difference is durability from what I can see. Funders want 5 years now. Regards Crispin Sent from my BlackBerry® PlayBook™ www.blackberry.com ------------------------------ *From:* "Boll, Martin Dr." <[email protected]> *To:* "[email protected]" <[email protected]> *Sent:* April 15, 2012 9:48 PM *Subject:* Re: [Stoves] Product list from Envirofit..so? / laziness Dear stovers, Jean-Francois, bon jour à la France d’Allemagne! It is necessary to continue somehow the line you draw in your posting in that thread. We must consider that laziness (e.g. and especially in preparing fuel) will be our most useful helper in acceptance of a stove. Wez would best construct CO2 neutral-stoves even for use (and with acceptance) in “lazy-advanced” countries. The law of minimal resistance applied on humans is simply called “laziness”; and that is a law of (all the) nature. The conclusion is the need, to construct stoves which burn (mostly) un-split and un-chopped wood, -even when small wood would burns far easier. The stove has to get quickly and brightly to burn without work; even when it has to burn later-on big logs. The nearly unreachable laziness-model is a bottle-gas-stove. If we want to work with wood or something likely we will be forced to work with hybrid-stoves, if we want to create stoves for lazymen/lazywomen. - A T-LUD, started with a gas-torch is likely the same, without being the method of choice. Dealing with wood-like fuel we will have to think always about a “fire-cascade” to get a stove quickly started and without much splitting/Chopping-work. Dealing with different-shaped fuel/wood the stoves must be different; e.g. rockets, T-Luds, saw-dust-stoves, etc., but all hybrid-stoves to deal with laziness. Since some months I am thinking about fuel/wood-pre-warming to facilitate that “fire-cascade” . Some “hand-held” experiments by starting my space heating stove gave me courage to look further. Regards Martin
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