Ah yes, relighting off the back wall or brick work a practice unapproved of by the US navy, but frequently done by those that got away with it the last time without harm. This practice at the least causes stresses to the burner front brick work shortening its' service life, but it can also result in...

75 Years go the world saw the first step in the end of a war that ravaged the world. Today we face a war of a different kind with an enemy that we can't easily see.
We can win again with the same resolve and sacrifice as our parents had during those hard years.

Happy VE-Day

Dave

Mike,
After looking at the 3D rendition, I think that the combustion air and exhaust gases pass through a plate type heat exchanger.

Dave

Many of these ships I’ve seen on the on the Columbia where I live. Calmar, and Olsen ships would call at the mills across the river from us, and the Lumber Lady (pg157), last of the steam schooners, would pass on its’ way to and from the mill in Rainer Oregon. I was four or five years old. In the 19...

Fred, The there is about a full page of text that further explains the ifs and buts of the tube wall graph I posted. You're examples and graphs say the same thing in and easier to understand. Now that said, I think there is a miss type with 210c and 0.42bar, looking at the steam tables reveals 110c ...

Latent Heat is the term I think you're thinking of.

I I hope this one works better

The posted image is in reply to Mikes comments related to the effects of fluid films on heat transfer across a tube wall. The image is from Chapter 8- introduction to thermodynamics, Principles of Naval Engineering, NAVPERS 10788-B

Capt. Mack The easiest way is to not measure the DO at all?! On the ST Portland we are using AGK100 a Drew Marine product that contains Hydrazine and a corrosion inhibitor, also sold as separate compounds under the name Drewplex. We use two test kits one for hydrazine and one for hydrate alkalinity....

I just got a reply that Ron is alive and living in Portland, but the source was not able to provide any other info?

So Where in the World is Ron Fossum?

David Vik