Dear Josh
If you have the raw data and know the method used, you can make a recalculation and get (for that test) a correction factor by comparing the initial and adjusted figure. The problem for complex tests is when there are errors of concept or calculation that treat different types of cars with different levels of 'skewing'. For example if the cheat is to use bald tires, it will affect heavier cars slightly more than light cars so although there exists a correction factor for both, they are not the same. If you make a conceptual error in how the test should be conducted, meaning the desired evaluation will be 'unfair' that concept will affect different stoves to a different extent. A 'cheat' amounts to an error and the same cheat will give different errors for non-identical models. It is interesting that if you follow the money you soon find the pressure building to fiddle. Regards Crispin by the volcano "In reality, some models emit 50% more CO2 than the official figures claim, while others emit some 15% more than claimed." .... Fascinating. An article linked in that piece also specified that several efficiency models, according to the manufacturers, "deliver between 70mpg and 75mpg, while the [independent] test figures ranged from 46mpg to 53mpg." Do you think there is enough "real world" data on mileage and emissions to calculate a "correction factor" that could be applied to manufacturers' published claims? On Thu, Mar 14, 2013 at 11:41 AM, Crispin Pemberton-Pigott <[email protected] <mailto:[email protected]> > wrote: Dear Stovers This is interesting: http://www.bbc.co.uk/news/business-21759258 As the money gets bigger and there is more focus on these metrics, the temptation to cut corners, figuratively and literally, is strong. The idea of independent validation of claims is sound. Regards Crispin _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] <mailto:[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://www.bioenergylists.org/ -- Josh Kearns PhD Candidate, Environmental Engineering University of Colorado-Boulder Visiting Researcher, North Carolina State University Director of Science Aqueous Solutions www.aqsolutions.org <http://www.aqsolutions.org> Mobile: 720 989 3959 Skype: joshkearns
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