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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Charlie<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>></span><span style='font-family:"Garamond","serif";color:black'> I'll be trying Crispin's heterogeneous protocol, since I already periodically record the change in water temperature during tests, to see if my target firepower is consistently maintained. It is definitely tempting to use a pot lid, after being laughed at too many times by cooks in the field when I insist that they do without one for my clumsy tests in their homes. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tom has agreed to create a SeTAR Centre section on the website and there will be many papers, workshops and documents there so you will be able to get the necessary protocols. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The SeTAR HTP method is to take a snapshot of the system performance after a certain time. That time could be per second, per 10 seconds, per minute of per 5 minutes. It only one snapshot is taken, of the whole test, you have a WBT, sort of.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The continuous assessment of all the performance metrics very quickly shows when the stove is working well. At that point, you get a stack of outputs related to <i>why</i> it is so good. The challenge is then to expand the zone of perfection forwards and backwards until it covers nearly all the burn time.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regarding the lid off the pot…………..why on earth are we still hearing about this stupid, stupid, stupid issue ?!? Baldwin got that part wrong!! Accept it!! Get used to it! Swallow it! It is good for you. Use a lid! Good grief.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For heaven’s sake scratch out the portion of any test protocol that requires the lid to be off the pot and glue a blank piece of paper and write on it:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>“Always use lids on pots unless you are certain that the target community you are testing for is known not to use them. If they do not, as part of your programme, always include training on the use of pot lids and their importance for stove performance and monitor the uptake of this important fuel saving measure.” <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>A normal stove that works really well is penalised if it is forced to a) boil an amount of water that is inappropriate for the stove (may are tuned to the community) and b) it the lid is off and normally it is not. Tests of stoves designed for 3.5 litres in a pot + lid tested with 5 litres and no lid are meaningless and directly cause invalid conclusions about performance.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>There is no such thing as a ‘standard 5 litres’ or 2.5 litres. That is completely arbitrary, sucked out of someone’s thumb and is not based on any proper engineering assessment method. If you want to know how a stove is going perform, test it with the fuel, pots and if possible, method of use that will be used in the field. If you need to train people to use a new method, test with both. There is no reason at all for <i>all</i> stoves to be able to bring a pot with no lid containing 5 litres of water to a boil. Literally billions of people do not do that, ever, in their meal preparation. The test protocol has to reflect that reality it the tests are to have any meaning.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks Charlie for your product review. Will it burn ordinary wood?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div></body></html>