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DrewM

DrewM

Joined on February 16, 2013

Last Post on January 31, 2014

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Commercial boilers

@ January 31, 2014 8:18 AM in Some recommended installation diagrams

This is a commercial line of 95% efficient boilers, ranging from 750 to 3000 MBH. These are the prescribed system piping diagrams from the IOM.
These aren't something I am on the hook to install- I found them while I was doing some research on a different situation.
However, since IOMs are authorities I typically rely on, I'm curious to find out how effective these pipe designs would be, taking them at face value.
Sort of a "Glitch and Fix", if you will.

For instance...

@ January 30, 2014 11:08 PM in Some recommended installation diagrams

On page 34, boilers connected consecutively to the header. What rate do the later boilers fire at?
Aren't those bypasses redundant?
Same questions on page 35. In addition, the primary pump is nowhere near the expansion tank.
Page 36- How would that air separator work?
Page 37 has pumps in series.
Am I missing something?

Just wanted...

@ January 30, 2014 10:30 PM in Some recommended installation diagrams

Just wanted to hear some commentary. I'm used to pointing to the IOM to support a point to an engineer or project manager, but these drawings don't seem to adhere to the best practices I'm familiar with. Am I missing something?

Some recommended installation diagrams

@ January 30, 2014 9:54 PM in Some recommended installation diagrams

Copied these out of an IO manual and would like to hear some comments about them. Apologies for them being sideways- I couldn't figure out how to rotate them and make it stick.
Thanks-

Soldering

@ February 23, 2013 10:51 PM in Question about pro press

I once crimped 2 sides of a tee, and then couldn't reach the bull because of ductwork.
After scratching my head a little, I pulled out the rubber, wrapped a wet rag around the fitting, and soldered it together.
Still don't like the stuff though.

ProPress

@ February 23, 2013 10:48 PM in Question about pro press

The consensus in our outfit is that it is a crackerjack shutdown tool, but for a full installation is awful. Every time you crimp a fitting it pulls the joint out of line, and if you have to make a change for any reason, you have to throw the old fitting out. Sure, it cuts down on the time it takes to train a guy, but do you really want someone so inexperienced that he can't solder pipe doing your work without supervision?

Real

@ February 21, 2013 9:30 PM in Coal- the cleanest fuel source for steam heat? See link

Real, yes, but a long way from being feasible yet.

Still makes the CO2

@ February 21, 2013 9:28 PM in Coal- the cleanest fuel source for steam heat? See link

If you search the topic, you'll find that the method actually still produces the same amount of CO2, just in a manner that is easier to capture. Which is great, but now what do you do with the CO2? Impressive science, and it sounds like it would help deal with some of the nastier pollution problems like acid rain.

Humidifier

@ February 19, 2013 7:34 PM in Clean Steam generator

Humidifier panels have two steam ports- one for humidifier steam (which could come from a separate source) and one to run a small heat exchanger that guarantees that all the humidifier steam is evaporated. It's the second one that creates the condensate. In our case all this steam is generated from softened water at the (power plant) steam powered steam generator. I am worried about sending back the untreated water from a source outside of the boiler feedwater system. Even if it works in practice, the theory bugs me.

Clean Steam generator

@ February 17, 2013 9:02 PM in Clean Steam generator

We are building a new mechanical room in a hospital, and using power plant steam (90 psi) to generate clean steam (15 psi) from softened water with Aerco steam generators for humidification. We are using Dristeem Ultra-sorb Model XV steam dispersion panels in the ductwork. The panels produce condensate, which our engineer has us collecting and sending back to the power plant along with the regular condensate. Is this a good idea? I would think it would throw off the power plant water chemistry.