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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Dear Friends of Testing<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='background:white'>There is a new document from China “Standards and Test Methods for Household Biomass Cookstoves: Lessons from International Experience”. It is available in two languages. The English version is at:<o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'><a href="https://collaboration.worldbank.org/docs/DOC-15091">https://collaboration.worldbank.org/docs/DOC-15091</a><o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'>The direct link to the document is<o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><a href="https://collaboration.worldbank.org/servlet/JiveServlet/downloadBody/15091-102-2-20396/Stove%20Standards%20Report_6-4-2015.pdf">https://collaboration.worldbank.org/servlet/JiveServlet/downloadBody/15091-102-2-20396/Stove%20Standards%20Report_6-4-2015.pdf</a><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=Default>It contains a great deal of technical discussion about many point addressed on this list, and looks at the following test methods:<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>Indian Emissions Test IS 13152<o:p></o:p></p><p class=Default>WBT v4.2.3 Emissions Test<o:p></o:p></p><p class=Default>HTP Emissions Test<o:p></o:p></p><p class=Default>Chinese Emissions Test NY/T 2370-2013<o:p></o:p></p><p class=Default>And a summary of several comparisons<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>For our discussion purposes there is an excellent chart of heat flow paths from the raw fuel to the final uses or losses. When discussing a performance metric, whatever it is named, it may be helpful to look at the chart to be sure you have selected the portions of the heat or energy that you want to report, either absolutely or relative to one another. See Figure 2.2 on p20.<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>Detailed formulae are given for each element of the chart which provides a snapshot of where the test methods stood and how they calculated things in 2014.<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>Using the chart one can, for example, avoid reporting a ‘thermal efficiency’ using numbers that represent energy that has not been thermalized, or providing as a metric a ratio you have not intended, in the finer details.<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>Another interesting section looks at when to end a test, with a test on emissions <i>after</i> the test indicating that there are considerable emissions of pollutants after the official count has stopped.<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>There are numerous suggestions for correction of calculations and to a certain extent, what to test.<o:p></o:p></p><p class=Default><o:p> </o:p></p><p class=Default>Regards<o:p></o:p></p><p class=Default>Crispin <o:p></o:p></p></div></body></html>