Dear Paul >...Another question is how is the WBT used by the EPA different from which version of the other WBT's?
All I know about the inner workings of the WBT that Jim is using is that he is using the method of calculating the thermal efficiency that was proposed for WBT4, which is to say that the thermal efficiency is calculated on the boiling phase only and the simmering phase is ignored. That is encouraging from my perspective. Other critical issues would be the use of the 5 litres of water as the `quantity of water boiled` (because it is) for the specific fuel consumption number, and the manner in which the heat value of the fuel and char remaining is done. Those were three of the most serious errors in the WBT3. Issues like the turn-down ratio are more subjective so I presume that still remains the ratio between the high power and simmer power with the lid off (maybe). Others want the ratio between high and low power which is nearly always a larger ratio. It would be great if Jim let know what they are using. There is still a lot of discussion on the topic. The SeTAR and SEET Lab protocols have been described at the sample sheet (presently v2.593) is available to researchers for the actual code used in the spreadsheet. 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://www.bioenergylists.org/
