[Stoves] Wonderwerk stove, more information

[kgharris]

Crispin,

It is not really so important to me, all these details.  A good stove will do well whatever the details, and our Wonderwerk is a good stove.  When and if the test you support is available the Wonderwerk will do well when tested by it, as will the other four stoves Aprovecho has developed, and other good stoves everywhere.  The CO and the PM are measured directly with precise instruments.  There are no questions here and good stoves will show their quality.  If you have a test that will show something different about the Wonderwerk stove, then I say bring it on!  The Wonderwerk stove is ready to rumble when and if ever you are!  I have spent the last two years developing a superbly clean burning stove.  Where is your test?

Kirk H.
  ----- Original Message ----- 
  From: Crispin Pemberton-Pigott 
  To: Discussion of biomass cooking stoves 
  Sent: Tuesday, July 12, 2016 10:50 AM
  Subject: Re: [Stoves] Wonderwerk stove, more information


  Dear Kirk
  I think this needs less correction that you offered. There is (as far as I know) no WBT 4.2.4, but there is a WBT 4.2.3 spreadsheet update bearing the number 4.2.4. It is on the GACC website. 
  The difference is that WBT4.2.3 is a test protocol and there is an accompanying spreadsheet. From what I see from Berkeley, they say the Python software reproduces the math and outputs of what is contained in the 4.2.4 spreadsheet, which is different from the 4.2.3 spreadsheet. 
  There are more than 660 differences mostly resulting from the deletion of entries (sort of like example data). It has been removed. 
  There is no longer a tab explaining what the differences are (what was changed from the previous versions) and there is no separate document on the website explaining the changes. There are other documents explaining some of the previous changes between previous version but not the latest one so you are on your own in that regard. 
  In order to see what the differences are in the result, I fill in different version of the spreadsheet using the same inputs. In that way you can see the effect on the calculated performance from different versions as the sheet evolves. 
  ‎Regards Crispin 






  There was a typo in this submission.  The WBT 4.2.3 was used not 4.2.4.

  Kirk H.
    ----- Original Message ----- 
    From: kgharris 
    To: Discussion of biomass cooking stoves 
    Sent: Thursday, July 07, 2016 5:45 PM
    Subject: [Stoves] Wonderwerk stove, more information


    All,

    The engineer at Lawrence Berkley National Labs stove testing lab has supplied the following information concerning the recent tests of the Wonderwerk TLUD-ND stove.
    Kirk H.

    Our plan is to put everything in a publication once we have finished testing all of the stoves.
    ____________

    The numbers I reported to you are calculated using equations in the WBT 4.2.4. We do not use a spreadsheet to calculate those numbers and instead use a Python code we developed to read it our raw data. Also, we do not do the carbon balance method to calculate PM2.5, but instead use the total dry fuel consumed method (fcd). Using Python helps us also analyze our ultra-fine particle data. Before you left, we cross checked our numbers with the WBT 4.2.4 spreadsheet (that we double checked for errors) to make sure nothing looked amiss with our Python analysis. This is something we always to to ensure data was imported correctly.


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