Service message #3

Time for a short post about small, interstitial (i.e. squeezed in between work- and family time) updates on Aeolians.net.

Reprints of Johannes Juul’s articles

First, I have done some work on item 3. of the to-do list from the last service message. I have started to type some of Johannes Juul’s papers in a modern format, including a revamp of the figures, map and other graphs, as well as additional information (added in footnotes) when relevant. The article can be found in the (new) section of the website called “Publications“, or by following this direct link.

See how the first reprint article looks like, compared with the original scanned version:

First page of the reprinted article “Measuring Wind Velocities at Varying Heights Above Ground” (1954) by Johannes Juul, originally published in the “Technical Papers Presented to the Wind Power Working Party”. See the Publications section of aeolians,net for the full reference.

Juul published many papers, but no book (as I know); therefore, it is no easy to read his works and studies, compared with the ones of Putnam, Golding or Hütter for instance. And this is unfortunate, because modern turbine design is that of Juul. Furthermore, Juul passed away in November 1969, almost… 50 years ago; so it is about time to have his papers re-edited.

You can see below how a revamped map looks like compared with the original scanned version. I hope that pimping up a bit these figures, as well as adding complementary information will help the Wind & Site community to (re)-discover the work of Johannes Julu, which, as I wrote in many instances on this blog, was of great value. The next reprint will be the 1949 article “Investigation of the Possibilities of Utilization of Wind Power“.

Revamped (top) and original (bottom) map from the reprinted Juul’s article mentioned above.

First public presentation of Aeolians.net

My good friend and ex-colleague at Ørsted, Lucas Marion, invited me to present the Aeolians.net project in their offices (about 10-minutes drive from my office). You can find the presentation in the Publication section of the website, here is the direct link. The talk was quite long, about 2 hours including questions and coffee break. The idea was to first go through an illustrated timeline of wind turbine design (somewhat already known by practioners), and then surprise the audience by drawing a parallel timeline of Wind & Site studies. The last part of the presentation focused on explaining why/how making a geneaology of our profession can make sense, and what problematics I am trying to tackle. I concluded with my humble brag moment, showing the result of the dialogue with the Journal of Energy History / Revue de l’Histoire de l’Energie and the Interpellation published earlier this year.

Photographs from the Smith-Putnam project

Senior researcher Kurt S. Hansen from DTU Wind Energy has kindly accepted to share a set of photographs from the Smith-Putnam project, which originally come from Glidden Doman. You can find the pictures at this link, and in the Publications section. I would like to thank Kurt a millon times for sharing these pictures, which I believe many are nowhere else to be found in the Internet.